diff options
Diffstat (limited to 'erts/emulator/beam/erl_process.c')
| -rw-r--r-- | erts/emulator/beam/erl_process.c | 6796 |
1 files changed, 5384 insertions, 1412 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 2439a46ab6..66f22979ad 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -1,18 +1,19 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 1996-2013. All Rights Reserved. + * Copyright Ericsson AB 1996-2016. All Rights Reserved. * - * The contents of this file are subject to the Erlang Public License, - * Version 1.1, (the "License"); you may not use this file except in - * compliance with the License. You should have received a copy of the - * Erlang Public License along with this software. If not, it can be - * retrieved online at http://www.erlang.org/. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at * - * Software distributed under the License is distributed on an "AS IS" - * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See - * the License for the specific language governing rights and limitations - * under the License. + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. * * %CopyrightEnd% */ @@ -42,8 +43,13 @@ #include "erl_thr_queue.h" #include "erl_async.h" #include "dtrace-wrapper.h" +#include "lttng-wrapper.h" #include "erl_ptab.h" +#include "erl_bif_unique.h" +#define ERTS_WANT_TIMER_WHEEL_API +#include "erl_time.h" +#define ERTS_CHECK_TIME_REDS CONTEXT_REDS #define ERTS_DELAYED_WAKEUP_INFINITY (~(Uint64) 0) #define ERTS_DELAYED_WAKEUP_REDUCTIONS ((Uint64) CONTEXT_REDS/2) @@ -110,7 +116,7 @@ #define RUNQ_SET_RQ(X, RQ) erts_smp_atomic_set_nob((X), (erts_aint_t) (RQ)) #ifdef DEBUG -# if defined(ARCH_64) && !HALFWORD_HEAP +# if defined(ARCH_64) # define ERTS_DBG_SET_INVALID_RUNQP(RQP, N) \ (RUNQ_SET_RQ((RQP), (0xdeadbeefdead0003LL | ((N) << 4))) # define ERTS_DBG_VERIFY_VALID_RUNQP(RQP) \ @@ -143,8 +149,16 @@ extern BeamInstr beam_apply[]; extern BeamInstr beam_exit[]; extern BeamInstr beam_continue_exit[]; -int erts_sched_compact_load; -Uint erts_no_schedulers; +int ERTS_WRITE_UNLIKELY(erts_default_spo_flags) = SPO_ON_HEAP_MSGQ; +int ERTS_WRITE_UNLIKELY(erts_eager_check_io) = 1; +int ERTS_WRITE_UNLIKELY(erts_sched_compact_load); +int ERTS_WRITE_UNLIKELY(erts_sched_balance_util) = 0; +Uint ERTS_WRITE_UNLIKELY(erts_no_schedulers); +Uint ERTS_WRITE_UNLIKELY(erts_no_dirty_cpu_schedulers) = 0; +Uint ERTS_WRITE_UNLIKELY(erts_no_dirty_io_schedulers) = 0; + +static char *erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_NO_FLAGS] = {0}; +int erts_aux_work_no_flags = ERTS_SSI_AUX_WORK_NO_FLAGS; #define ERTS_THR_PRGR_LATER_CLEANUP_OP_THRESHOLD_VERY_LAZY (4*1024*1024) #define ERTS_THR_PRGR_LATER_CLEANUP_OP_THRESHOLD_LAZY (512*1024) @@ -173,42 +187,176 @@ int erts_disable_proc_not_running_opt; static ErtsAuxWorkData *aux_thread_aux_work_data; -#define ERTS_SCHDLR_SSPND_CHNG_WAITER (((erts_aint32_t) 1) << 0) +#define ERTS_SCHDLR_SSPND_CHNG_NMSB (((erts_aint32_t) 1) << 0) #define ERTS_SCHDLR_SSPND_CHNG_MSB (((erts_aint32_t) 1) << 1) #define ERTS_SCHDLR_SSPND_CHNG_ONLN (((erts_aint32_t) 1) << 2) +#define ERTS_SCHDLR_SSPND_CHNG_DCPU_ONLN (((erts_aint32_t) 1) << 3) -#ifndef DEBUG +typedef enum { + ERTS_SCHED_NORMAL, + ERTS_SCHED_DIRTY_CPU, + ERTS_SCHED_DIRTY_IO +} ErtsSchedType; -#define ERTS_SCHDLR_SSPND_CHNG_SET(VAL, OLD_VAL) \ - erts_smp_atomic32_set_nob(&schdlr_sspnd.changing, (VAL)) +typedef struct { + int ongoing; + ErtsProcList *blckrs; + ErtsProcList *chngq; +} ErtsMultiSchedulingBlock; -#else +static struct { + erts_smp_mtx_t mtx; + Uint32 online; + Uint32 curr_online; + Uint32 active; + erts_smp_atomic32_t changing; + ErtsProcList *chngq; + Eterm changer; + ErtsMultiSchedulingBlock nmsb; /* Normal multi Scheduling Block */ + ErtsMultiSchedulingBlock msb; /* Multi Scheduling Block */ +} schdlr_sspnd; -#define ERTS_SCHDLR_SSPND_CHNG_SET(VAL, OLD_VAL) \ -do { \ - erts_aint32_t old_val__; \ - old_val__ = erts_smp_atomic32_xchg_nob(&schdlr_sspnd.changing, \ - (VAL)); \ - ASSERT(old_val__ == (OLD_VAL)); \ -} while (0) +#define ERTS_SCHDLR_SSPND_S_BITS 10 +#define ERTS_SCHDLR_SSPND_DCS_BITS 11 +#define ERTS_SCHDLR_SSPND_DIS_BITS 11 + +#define ERTS_SCHDLR_SSPND_S_MASK ((1 << ERTS_SCHDLR_SSPND_S_BITS)-1) +#define ERTS_SCHDLR_SSPND_DCS_MASK ((1 << ERTS_SCHDLR_SSPND_DCS_BITS)-1) +#define ERTS_SCHDLR_SSPND_DIS_MASK ((1 << ERTS_SCHDLR_SSPND_DIS_BITS)-1) +#define ERTS_SCHDLR_SSPND_S_SHIFT 0 +#define ERTS_SCHDLR_SSPND_DCS_SHIFT (ERTS_SCHDLR_SSPND_S_SHIFT \ + + ERTS_SCHDLR_SSPND_S_BITS) +#define ERTS_SCHDLR_SSPND_DIS_SHIFT (ERTS_SCHDLR_SSPND_DCS_SHIFT \ + + ERTS_SCHDLR_SSPND_DCS_BITS) + +#if (ERTS_SCHDLR_SSPND_S_BITS \ + + ERTS_SCHDLR_SSPND_DCS_BITS \ + + ERTS_SCHDLR_SSPND_DIS_BITS) > 32 +# error Wont fit in Uint32 #endif +#if (ERTS_MAX_NO_OF_SCHEDULERS-1) > ERTS_SCHDLR_SSPND_S_MASK +# error Max no schedulers wont fit in its bit-field +#endif +#if ERTS_MAX_NO_OF_DIRTY_CPU_SCHEDULERS > ERTS_SCHDLR_SSPND_DCS_MASK +# error Max no dirty cpu schedulers wont fit in its bit-field +#endif +#if ERTS_MAX_NO_OF_DIRTY_IO_SCHEDULERS > ERTS_SCHDLR_SSPND_DIS_MASK +# error Max no dirty io schedulers wont fit in its bit-field +#endif -static struct { - erts_smp_mtx_t mtx; - erts_smp_cnd_t cnd; - int online; - int curr_online; - int wait_curr_online; - erts_smp_atomic32_t changing; - erts_smp_atomic32_t active; - struct { - int ongoing; - long wait_active; - ErtsProcList *procs; - } msb; /* Multi Scheduling Block */ -} schdlr_sspnd; +#define ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(S, DCS, DIS) \ + ((((Uint32) (((S) & ERTS_SCHDLR_SSPND_S_MASK))-1) \ + << ERTS_SCHDLR_SSPND_S_SHIFT) \ + | ((((Uint32) ((DCS) & ERTS_SCHDLR_SSPND_DCS_MASK)) \ + << ERTS_SCHDLR_SSPND_DCS_SHIFT)) \ + | ((((Uint32) ((DIS) & ERTS_SCHDLR_SSPND_DIS_MASK)) \ + << ERTS_SCHDLR_SSPND_DIS_SHIFT))) + +static void init_scheduler_suspend(void); + +static ERTS_INLINE Uint32 +schdlr_sspnd_get_nscheds(Uint32 *valp, ErtsSchedType type) +{ + Uint32 res = (Uint32) (*valp); + switch (type) { + case ERTS_SCHED_NORMAL: + res >>= ERTS_SCHDLR_SSPND_S_SHIFT; + res &= (Uint32) ERTS_SCHDLR_SSPND_S_MASK; + res++; + break; + case ERTS_SCHED_DIRTY_CPU: + res >>= ERTS_SCHDLR_SSPND_DCS_SHIFT; + res &= (Uint32) ERTS_SCHDLR_SSPND_DCS_MASK; + break; + case ERTS_SCHED_DIRTY_IO: + res >>= ERTS_SCHDLR_SSPND_DIS_SHIFT; + res &= (Uint32) ERTS_SCHDLR_SSPND_DIS_MASK; + break; + default: + ERTS_INTERNAL_ERROR("Invalid scheduler type"); + return 0; + } + + return res; +} + +static ERTS_INLINE void +schdlr_sspnd_dec_nscheds(Uint32 *valp, ErtsSchedType type) +{ + ASSERT(schdlr_sspnd_get_nscheds(valp, type) > 0); + + switch (type) { + case ERTS_SCHED_NORMAL: + *valp -= ((Uint32) 1) << ERTS_SCHDLR_SSPND_S_SHIFT; + break; + case ERTS_SCHED_DIRTY_CPU: + *valp -= ((Uint32) 1) << ERTS_SCHDLR_SSPND_DCS_SHIFT; + break; + case ERTS_SCHED_DIRTY_IO: + *valp -= ((Uint32) 1) << ERTS_SCHDLR_SSPND_DIS_SHIFT; + break; + default: + ERTS_INTERNAL_ERROR("Invalid scheduler type"); + } +} + +static ERTS_INLINE void +schdlr_sspnd_inc_nscheds(Uint32 *valp, ErtsSchedType type) +{ + switch (type) { + case ERTS_SCHED_NORMAL: + ASSERT(schdlr_sspnd_get_nscheds(valp, type) + < ERTS_MAX_NO_OF_SCHEDULERS-1); + *valp += ((Uint32) 1) << ERTS_SCHDLR_SSPND_S_SHIFT; + break; + case ERTS_SCHED_DIRTY_CPU: + ASSERT(schdlr_sspnd_get_nscheds(valp, type) + < ERTS_MAX_NO_OF_DIRTY_CPU_SCHEDULERS); + *valp += ((Uint32) 1) << ERTS_SCHDLR_SSPND_DCS_SHIFT; + break; + case ERTS_SCHED_DIRTY_IO: + ASSERT(schdlr_sspnd_get_nscheds(valp, type) + < ERTS_MAX_NO_OF_DIRTY_IO_SCHEDULERS); + *valp += ((Uint32) 1) << ERTS_SCHDLR_SSPND_DIS_SHIFT; + break; + default: + ERTS_INTERNAL_ERROR("Invalid scheduler type"); + } +} + +static ERTS_INLINE void +schdlr_sspnd_set_nscheds(Uint32 *valp, ErtsSchedType type, Uint32 no) +{ + Uint32 val = *valp; + + switch (type) { + case ERTS_SCHED_NORMAL: + ASSERT(no > 0); + val &= ~(((Uint32) ERTS_SCHDLR_SSPND_S_MASK) + << ERTS_SCHDLR_SSPND_S_SHIFT); + val |= (((no-1) & ((Uint32) ERTS_SCHDLR_SSPND_S_MASK)) + << ERTS_SCHDLR_SSPND_S_SHIFT); + break; + case ERTS_SCHED_DIRTY_CPU: + val &= ~(((Uint32) ERTS_SCHDLR_SSPND_DCS_MASK) + << ERTS_SCHDLR_SSPND_DCS_SHIFT); + val |= ((no & ((Uint32) ERTS_SCHDLR_SSPND_DCS_MASK)) + << ERTS_SCHDLR_SSPND_DCS_SHIFT); + break; + case ERTS_SCHED_DIRTY_IO: + val &= ~(((Uint32) ERTS_SCHDLR_SSPND_DIS_MASK) + << ERTS_SCHDLR_SSPND_DIS_SHIFT); + val |= ((no & ((Uint32) ERTS_SCHDLR_SSPND_DIS_MASK)) + << ERTS_SCHDLR_SSPND_DIS_SHIFT); + break; + default: + ERTS_INTERNAL_ERROR("Invalid scheduler type"); + } + + *valp = val; +} static struct { erts_smp_mtx_t update_mtx; @@ -238,7 +386,7 @@ do { \ erts_sched_stat_t erts_sched_stat; #ifdef USE_THREADS -static erts_tsd_key_t sched_data_key; +static erts_tsd_key_t ERTS_WRITE_UNLIKELY(sched_data_key); #endif static erts_smp_atomic32_t function_calls; @@ -258,6 +406,14 @@ ErtsAlignedRunQueue *erts_aligned_run_queues; Uint erts_no_run_queues; ErtsAlignedSchedulerData *erts_aligned_scheduler_data; +#ifdef ERTS_DIRTY_SCHEDULERS +ErtsAlignedSchedulerData *erts_aligned_dirty_cpu_scheduler_data; +ErtsAlignedSchedulerData *erts_aligned_dirty_io_scheduler_data; +typedef union { + Process dsp; + char align[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(Process))]; +} ErtsAlignedDirtyShadowProcess; +#endif typedef union { ErtsSchedulerSleepInfo ssi; @@ -265,24 +421,66 @@ typedef union { } ErtsAlignedSchedulerSleepInfo; static ErtsAlignedSchedulerSleepInfo *aligned_sched_sleep_info; +#ifdef ERTS_DIRTY_SCHEDULERS +#ifdef ERTS_SMP +static ErtsAlignedSchedulerSleepInfo *aligned_dirty_cpu_sched_sleep_info; +static ErtsAlignedSchedulerSleepInfo *aligned_dirty_io_sched_sleep_info; +#endif +#endif static Uint last_reductions; static Uint last_exact_reductions; -Uint erts_default_process_flags; -Eterm erts_system_monitor; -Eterm erts_system_monitor_long_gc; -Uint erts_system_monitor_long_schedule; -Eterm erts_system_monitor_large_heap; +Eterm ERTS_WRITE_UNLIKELY(erts_system_monitor); +Eterm ERTS_WRITE_UNLIKELY(erts_system_monitor_long_gc); +Uint ERTS_WRITE_UNLIKELY(erts_system_monitor_long_schedule); +Eterm ERTS_WRITE_UNLIKELY(erts_system_monitor_large_heap); struct erts_system_monitor_flags_t erts_system_monitor_flags; /* system performance monitor */ Eterm erts_system_profile; struct erts_system_profile_flags_t erts_system_profile_flags; +int erts_system_profile_ts_type = ERTS_TRACE_FLG_NOW_TIMESTAMP; #if ERTS_MAX_PROCESSES > 0x7fffffff #error "Need to store process_count in another type" #endif +typedef enum { + ERTS_PSTT_GC, /* Garbage Collect */ + ERTS_PSTT_CPC, /* Check Process Code */ + ERTS_PSTT_COHMQ, /* Change off heap message queue */ + ERTS_PSTT_FTMQ /* Flush trace msg queue */ +} ErtsProcSysTaskType; + +#define ERTS_MAX_PROC_SYS_TASK_ARGS 2 + +struct ErtsProcSysTask_ { + ErtsProcSysTask *next; + ErtsProcSysTask *prev; + ErtsProcSysTaskType type; + Eterm requester; + Eterm reply_tag; + Eterm req_id; + Uint req_id_sz; + Eterm arg[ERTS_MAX_PROC_SYS_TASK_ARGS]; + ErlOffHeap off_heap; + Eterm heap[1]; +}; + +#define ERTS_PROC_SYS_TASK_SIZE(HSz) \ + (sizeof(ErtsProcSysTask) - sizeof(Eterm) + sizeof(Eterm)*(HSz)) + +struct ErtsProcSysTaskQs_ { + int qmask; + int ncount; + ErtsProcSysTask *q[ERTS_NO_PROC_PRIO_LEVELS]; +}; + +ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(proc_sys_task_queues, + ErtsProcSysTaskQs, + 50, + ERTS_ALC_T_PROC_SYS_TSK_QS) + ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(misc_op_list, ErtsMiscOpList, 10, @@ -294,9 +492,19 @@ ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(proclist, ERTS_ALC_T_PROC_LIST) #define ERTS_SCHED_SLEEP_INFO_IX(IX) \ - (ASSERT_EXPR(-1 <= ((int) (IX)) \ + (ASSERT(-1 <= ((int) (IX)) \ && ((int) (IX)) < ((int) erts_no_schedulers)), \ &aligned_sched_sleep_info[(IX)].ssi) +#ifdef ERTS_DIRTY_SCHEDULERS +#define ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(IX) \ + (ASSERT(0 <= ((int) (IX)) \ + && ((int) (IX)) < ((int) erts_no_dirty_cpu_schedulers)), \ + &aligned_dirty_cpu_sched_sleep_info[(IX)].ssi) +#define ERTS_DIRTY_IO_SCHED_SLEEP_INFO_IX(IX) \ + (ASSERT(0 <= ((int) (IX)) \ + && ((int) (IX)) < ((int) erts_no_dirty_io_schedulers)), \ + &aligned_dirty_io_sched_sleep_info[(IX)].ssi) +#endif #define ERTS_FOREACH_RUNQ(RQVAR, DO) \ do { \ @@ -314,8 +522,10 @@ do { \ do { \ ErtsRunQueue *RQVAR; \ int ix__; \ + int online__ = (int) schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, \ + ERTS_SCHED_NORMAL); \ ERTS_SMP_LC_ASSERT(erts_smp_lc_mtx_is_locked(&schdlr_sspnd.mtx)); \ - for (ix__ = 0; ix__ < schdlr_sspnd.online; ix__++) { \ + for (ix__ = 0; ix__ < online__; ix__++) { \ RQVAR = ERTS_RUNQ_IX(ix__); \ erts_smp_runq_lock(RQVAR); \ { DO; } \ @@ -345,13 +555,20 @@ do { \ static void exec_misc_ops(ErtsRunQueue *); static void print_function_from_pc(int to, void *to_arg, BeamInstr* x); -static int stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp, - int yreg); +static int stack_element_dump(int to, void *to_arg, Eterm* sp, int yreg); static void aux_work_timeout(void *unused); static void aux_work_timeout_early_init(int no_schedulers); static void aux_work_timeout_late_init(void); -static void setup_aux_work_timer(void); +static void setup_aux_work_timer(ErtsSchedulerData *esdp); + +static int execute_sys_tasks(Process *c_p, + erts_aint32_t *statep, + int in_reds); +static int cleanup_sys_tasks(Process *c_p, + erts_aint32_t in_state, + int in_reds); + #if defined(DEBUG) || 0 #define ERTS_DBG_CHK_AUX_WORK_VAL(V) dbg_chk_aux_work_val((V)) @@ -373,20 +590,21 @@ dbg_chk_aux_work_val(erts_aint32_t value) valid |= ERTS_SSI_AUX_WORK_MISC_THR_PRGR; valid |= ERTS_SSI_AUX_WORK_DD; valid |= ERTS_SSI_AUX_WORK_DD_THR_PRGR; + valid |= ERTS_SSI_AUX_WORK_CNCLD_TMRS; + valid |= ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR; valid |= ERTS_SSI_AUX_WORK_THR_PRGR_LATER_OP; + valid |= ERTS_SSI_AUX_WORK_PENDING_EXITERS; #endif #if HAVE_ERTS_MSEG valid |= ERTS_SSI_AUX_WORK_MSEG_CACHE_CHECK; #endif -#ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN - valid |= ERTS_SSI_AUX_WORK_CHECK_CHILDREN; -#endif #ifdef ERTS_SSI_AUX_WORK_REAP_PORTS valid |= ERTS_SSI_AUX_WORK_REAP_PORTS; #endif + valid |= ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED; if (~valid & value) - erl_exit(ERTS_ABORT_EXIT, + erts_exit(ERTS_ABORT_EXIT, "Invalid aux_work value found: 0x%x\n", ~valid & value); } @@ -398,8 +616,8 @@ dbg_chk_aux_work_val(erts_aint32_t value) #endif #ifdef ERTS_SMP -static void handle_pending_exiters(ErtsProcList *); - +static void do_handle_pending_exiters(ErtsProcList *); +static void wake_scheduler(ErtsRunQueue *rq); #endif #if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK) @@ -439,54 +657,83 @@ void erts_pre_init_process(void) { #ifdef USE_THREADS - erts_tsd_key_create(&sched_data_key); -#endif + erts_tsd_key_create(&sched_data_key, "erts_sched_data_key"); +#endif + + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_DELAYED_AW_WAKEUP_IX] + = "DELAYED_AW_WAKEUP"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_DD_IX] + = "DD"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_DD_THR_PRGR_IX] + = "DD_THR_PRGR"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_FIX_ALLOC_DEALLOC_IX] + = "FIX_ALLOC_DEALLOC"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_FIX_ALLOC_LOWER_LIM_IX] + = "FIX_ALLOC_LOWER_LIM"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_THR_PRGR_LATER_OP_IX] + = "THR_PRGR_LATER_OP"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_CNCLD_TMRS_IX] + = "CNCLD_TMRS"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR_IX] + = "CNCLD_TMRS_THR_PRGR"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_ASYNC_READY_IX] + = "ASYNC_READY"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_ASYNC_READY_CLEAN_IX] + = "ASYNC_READY_CLEAN"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_MISC_THR_PRGR_IX] + = "MISC_THR_PRGR"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_MISC_IX] + = "MISC"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_PENDING_EXITERS_IX] + = "PENDING_EXITERS"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_SET_TMO_IX] + = "SET_TMO"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_MSEG_CACHE_CHECK_IX] + = "MSEG_CACHE_CHECK"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_REAP_PORTS_IX] + = "REAP_PORTS"; + erts_aux_work_flag_descr[ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED_IX] + = "DEBUG_WAIT_COMPLETED"; #ifdef ERTS_ENABLE_LOCK_CHECK - { - int ix; - erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].get_locks - = ERTS_PSD_ERROR_HANDLER_BUF_GET_LOCKS; - erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].set_locks - = ERTS_PSD_ERROR_HANDLER_BUF_SET_LOCKS; + erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].get_locks + = ERTS_PSD_ERROR_HANDLER_BUF_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_ERROR_HANDLER].set_locks + = ERTS_PSD_ERROR_HANDLER_BUF_SET_LOCKS; - erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].get_locks - = ERTS_PSD_SAVED_CALLS_BUF_GET_LOCKS; - erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].set_locks - = ERTS_PSD_SAVED_CALLS_BUF_SET_LOCKS; + erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].get_locks + = ERTS_PSD_SAVED_CALLS_BUF_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_SAVED_CALLS_BUF].set_locks + = ERTS_PSD_SAVED_CALLS_BUF_SET_LOCKS; - erts_psd_required_locks[ERTS_PSD_SCHED_ID].get_locks - = ERTS_PSD_SCHED_ID_GET_LOCKS; - erts_psd_required_locks[ERTS_PSD_SCHED_ID].set_locks - = ERTS_PSD_SCHED_ID_SET_LOCKS; + erts_psd_required_locks[ERTS_PSD_SCHED_ID].get_locks + = ERTS_PSD_SCHED_ID_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_SCHED_ID].set_locks + = ERTS_PSD_SCHED_ID_SET_LOCKS; - erts_psd_required_locks[ERTS_PSD_DIST_ENTRY].get_locks - = ERTS_PSD_DIST_ENTRY_GET_LOCKS; - erts_psd_required_locks[ERTS_PSD_DIST_ENTRY].set_locks - = ERTS_PSD_DIST_ENTRY_SET_LOCKS; + erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].get_locks + = ERTS_PSD_CALL_TIME_BP_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].set_locks + = ERTS_PSD_CALL_TIME_BP_SET_LOCKS; - erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].get_locks - = ERTS_PSD_CALL_TIME_BP_GET_LOCKS; - erts_psd_required_locks[ERTS_PSD_CALL_TIME_BP].set_locks - = ERTS_PSD_CALL_TIME_BP_SET_LOCKS; + erts_psd_required_locks[ERTS_PSD_DELAYED_GC_TASK_QS].get_locks + = ERTS_PSD_DELAYED_GC_TASK_QS_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_DELAYED_GC_TASK_QS].set_locks + = ERTS_PSD_DELAYED_GC_TASK_QS_SET_LOCKS; - /* Check that we have locks for all entries */ - for (ix = 0; ix < ERTS_PSD_SIZE; ix++) { - ERTS_SMP_LC_ASSERT(erts_psd_required_locks[ix].get_locks); - ERTS_SMP_LC_ASSERT(erts_psd_required_locks[ix].set_locks); - } - } + erts_psd_required_locks[ERTS_PSD_NIF_TRAP_EXPORT].get_locks + = ERTS_PSD_NIF_TRAP_EXPORT_GET_LOCKS; + erts_psd_required_locks[ERTS_PSD_NIF_TRAP_EXPORT].set_locks + = ERTS_PSD_NIF_TRAP_EXPORT_SET_LOCKS; #endif } -#ifdef ERTS_SMP static void release_process(void *vproc) { - erts_smp_proc_dec_refc((Process *) vproc); + erts_proc_dec_refc((Process *) vproc); } -#endif /* initialize the scheduler */ void @@ -502,20 +749,21 @@ erts_init_process(int ncpu, int proc_tab_size, int legacy_proc_tab) erts_ptab_init_table(&erts_proc, ERTS_ALC_T_PROC_TABLE, -#ifdef ERTS_SMP release_process, -#else - NULL, -#endif (ErtsPTabElementCommon *) &erts_invalid_process.common, proc_tab_size, sizeof(Process), "process_table", - legacy_proc_tab); + legacy_proc_tab, +#ifdef ERTS_SMP + 1 +#else + 0 +#endif + ); last_reductions = 0; last_exact_reductions = 0; - erts_default_process_flags = 0; } void @@ -561,6 +809,7 @@ erts_late_init_process(void) static void init_sched_wall_time(ErtsSchedWallTime *swtp) { + swtp->need = erts_sched_balance_util; swtp->enabled = 0; swtp->start = 0; swtp->working.total = 0; @@ -571,8 +820,8 @@ init_sched_wall_time(ErtsSchedWallTime *swtp) static ERTS_INLINE Uint64 sched_wall_time_ts(void) { -#ifdef HAVE_GETHRTIME - return (Uint64) sys_gethrtime(); +#ifdef ERTS_HAVE_OS_MONOTONIC_TIME_SUPPORT + return (Uint64) erts_os_monotonic_time(); #else Uint64 res; SysTimeval tv; @@ -583,29 +832,213 @@ sched_wall_time_ts(void) #endif } +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + +static ERTS_INLINE Uint64 +aschedtime_read(ErtsAtomicSchedTime *var) +{ + return (Uint64) erts_atomic64_read_nob((erts_atomic64_t *) var); +} + +static ERTS_INLINE void +aschedtime_set(ErtsAtomicSchedTime *var, Uint64 val) +{ + erts_atomic64_set_nob((erts_atomic64_t *) var, (erts_aint64_t) val); +} + +static ERTS_INLINE void +aschedtime_init(ErtsAtomicSchedTime *var) +{ + erts_atomic64_init_nob((erts_atomic64_t *) var, (erts_aint64_t) 0); +} + +#define ERTS_GET_AVG_MAX_UNLOCKED_TRY 50 +#define ERTS_SCHED_AVG_UTIL_WRITE_MARKER (~((Uint64) 0)) + +/* Intervals in nanoseconds */ +#define ERTS_SCHED_UTIL_SHORT_INTERVAL ((Uint64) 1*1000*1000*1000) +#define ERTS_SCHED_UTIL_LONG_INTERVAL ((Uint64) 10*1000*1000*1000) + + +#define ERTS_SCHED_UTIL_IGNORE_IMBALANCE_DIFF 5000 /* ppm */ + +static ERTS_INLINE Uint64 +calc_sched_worktime(int is_working, Uint64 now, Uint64 last, + Uint64 interval, Uint64 old_worktime) +{ + Uint64 worktime; + Uint64 new; + + if (now <= last) + return old_worktime; + + new = now - last; + + if (new >= interval) + return is_working ? interval : (Uint64) 0; + + + /* + * Division by 1000 in order to avoid + * overflow. If changed update assertions + * in init_runq_sched_util(). + */ + worktime = old_worktime; + worktime *= (interval - new)/1000; + worktime /= (interval/1000); + if (is_working) + worktime += new; + + ASSERT(0 <= worktime && worktime <= interval); + + return worktime; +} + +static ERTS_INLINE void +update_avg_sched_util(ErtsSchedulerData *esdp, Uint64 now, int is_working) +{ + ErtsRunQueue *rq; + int worked; + Uint64 swt, lwt, last; + + rq = esdp->run_queue; + last = aschedtime_read(&rq->sched_util.last); + + if (now <= last) { + ASSERT(last == ERTS_SCHED_AVG_UTIL_WRITE_MARKER); + return; + } + + ASSERT(now >= last); + + worked = rq->sched_util.is_working; + + swt = calc_sched_worktime(worked, now, last, ERTS_SCHED_UTIL_SHORT_INTERVAL, + rq->sched_util.worktime.short_interval); + lwt = calc_sched_worktime(worked, now, last, ERTS_SCHED_UTIL_LONG_INTERVAL, + rq->sched_util.worktime.long_interval); + + aschedtime_set(&rq->sched_util.last, ERTS_SCHED_AVG_UTIL_WRITE_MARKER); + ERTS_THR_WRITE_MEMORY_BARRIER; + rq->sched_util.is_working = is_working; + rq->sched_util.worktime.short_interval = swt; + rq->sched_util.worktime.long_interval = lwt; + ERTS_THR_WRITE_MEMORY_BARRIER; + aschedtime_set(&rq->sched_util.last, now); +} + +int +erts_get_sched_util(ErtsRunQueue *rq, int initially_locked, int short_interval) +{ + /* Average scheduler utilization in ppm */ + int util, is_working, try = 0, locked = initially_locked; + Uint64 worktime, old_worktime, now, last, interval, *old_worktimep; + + if (short_interval) { + old_worktimep = &rq->sched_util.worktime.short_interval; + interval = ERTS_SCHED_UTIL_SHORT_INTERVAL; + } + else { + old_worktimep = &rq->sched_util.worktime.long_interval; + interval = ERTS_SCHED_UTIL_LONG_INTERVAL; + } + + while (1) { + Uint64 chk_last; + last = aschedtime_read(&rq->sched_util.last); + ERTS_THR_READ_MEMORY_BARRIER; + is_working = rq->sched_util.is_working; + old_worktime = *old_worktimep; + ERTS_THR_READ_MEMORY_BARRIER; + chk_last = aschedtime_read(&rq->sched_util.last); + if (chk_last == last) + break; + if (!locked) { + if (++try >= ERTS_GET_AVG_MAX_UNLOCKED_TRY) { + /* Writer will eventually block on runq-lock */ + erts_smp_runq_lock(rq); + locked = 1; + } + } + } + + if (!initially_locked && locked) + erts_smp_runq_unlock(rq); + + now = sched_wall_time_ts(); + worktime = calc_sched_worktime(is_working, now, last, interval, old_worktime); + + util = (int) ((worktime * 1000000)/interval); + + ASSERT(0 <= util && util <= 1000000); + + return util; +} + +static void +init_runq_sched_util(ErtsRunQueueSchedUtil *rqsu, int enabled) +{ + aschedtime_init(&rqsu->last); + if (!enabled) + aschedtime_set(&rqsu->last, ERTS_SCHED_AVG_UTIL_WRITE_MARKER); + rqsu->is_working = 0; + rqsu->worktime.short_interval = (Uint64) 0; + rqsu->worktime.long_interval = (Uint64) 0; + +#ifdef DEBUG + { + Uint64 intrvl; + /* + * If one of these asserts fail we may have + * overflow in calc_sched_worktime(). Which + * have to be fixed either by shrinking + * interval size, or fix calculation of + * worktime in calc_sched_worktime(). + */ + intrvl = ERTS_SCHED_UTIL_SHORT_INTERVAL; + ASSERT(intrvl*(intrvl/1000) > intrvl); + intrvl = ERTS_SCHED_UTIL_LONG_INTERVAL; + ASSERT(intrvl*(intrvl/1000) > intrvl); + } +#endif +} + +#endif /* ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT */ + static ERTS_INLINE void sched_wall_time_change(ErtsSchedulerData *esdp, int working) { - if (esdp->sched_wall_time.enabled) { + if (esdp->sched_wall_time.need) { Uint64 ts = sched_wall_time_ts(); - if (working) { +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + update_avg_sched_util(esdp, ts, working); +#endif + if (esdp->sched_wall_time.enabled) { + if (working) { #ifdef DEBUG - ASSERT(!esdp->sched_wall_time.working.currently); - esdp->sched_wall_time.working.currently = 1; + ASSERT(!esdp->sched_wall_time.working.currently); + esdp->sched_wall_time.working.currently = 1; #endif - ts -= esdp->sched_wall_time.start; - esdp->sched_wall_time.working.start = ts; - } - else { + ts -= esdp->sched_wall_time.start; + esdp->sched_wall_time.working.start = ts; + } + else { #ifdef DEBUG - ASSERT(esdp->sched_wall_time.working.currently); - esdp->sched_wall_time.working.currently = 0; + ASSERT(esdp->sched_wall_time.working.currently); + esdp->sched_wall_time.working.currently = 0; #endif - ts -= esdp->sched_wall_time.start; - ts -= esdp->sched_wall_time.working.start; - esdp->sched_wall_time.working.total += ts; + ts -= esdp->sched_wall_time.start; + ts -= esdp->sched_wall_time.working.start; + esdp->sched_wall_time.working.total += ts; + } } } + if (!working) { + ERTS_MSACC_SET_STATE_M_X(ERTS_MSACC_STATE_BUSY_WAIT); + } else { + ERTS_MSACC_SET_STATE_M_X(ERTS_MSACC_STATE_OTHER); + } + } typedef struct { @@ -618,25 +1051,24 @@ typedef struct { erts_smp_atomic32_t refc; } ErtsSchedWallTimeReq; -#if !HALFWORD_HEAP +typedef struct { + Process *proc; + Eterm ref; + Eterm ref_heap[REF_THING_SIZE]; + Uint req_sched; + erts_smp_atomic32_t refc; +} ErtsSystemCheckReq; + + ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(swtreq, ErtsSchedWallTimeReq, 5, ERTS_ALC_T_SCHED_WTIME_REQ) -#else -static ERTS_INLINE ErtsSchedWallTimeReq * -swtreq_alloc(void) -{ - return erts_alloc(ERTS_ALC_T_SCHED_WTIME_REQ, - sizeof(ErtsSchedWallTimeReq)); -} -static ERTS_INLINE void -swtreq_free(ErtsSchedWallTimeReq *ptr) -{ - erts_free(ERTS_ALC_T_SCHED_WTIME_REQ, ptr); -} -#endif +ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(screq, + ErtsSystemCheckReq, + 5, + ERTS_ALC_T_SYS_CHECK_REQ) static void reply_sched_wall_time(void *vswtrp) @@ -653,15 +1085,20 @@ reply_sched_wall_time(void *vswtrp) Eterm **hpp; Uint sz, *szp; ErlOffHeap *ohp = NULL; - ErlHeapFragment *bp = NULL; + ErtsMessage *mp = NULL; ASSERT(esdp); - +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); +#endif if (swtrp->set) { - if (!swtrp->enable && esdp->sched_wall_time.enabled) + if (!swtrp->enable && esdp->sched_wall_time.enabled) { + esdp->sched_wall_time.need = erts_sched_balance_util; esdp->sched_wall_time.enabled = 0; + } else if (swtrp->enable && !esdp->sched_wall_time.enabled) { Uint64 ts = sched_wall_time_ts(); + esdp->sched_wall_time.need = 1; esdp->sched_wall_time.enabled = 1; esdp->sched_wall_time.start = ts; esdp->sched_wall_time.working.total = 0; @@ -704,16 +1141,12 @@ reply_sched_wall_time(void *vswtrp) if (hpp) break; - hp = erts_alloc_message_heap(sz, &bp, &ohp, rp, &rp_locks); + mp = erts_alloc_message_heap(rp, &rp_locks, sz, &hp, &ohp); szp = NULL; hpp = &hp; } - erts_queue_message(rp, &rp_locks, bp, msg, NIL -#ifdef USE_VM_PROBES - , NIL -#endif - ); + erts_queue_message(rp, rp_locks, mp, msg, am_system); if (swtrp->req_sched == esdp->no) rp_locks &= ~ERTS_PROC_LOCK_MAIN; @@ -721,7 +1154,7 @@ reply_sched_wall_time(void *vswtrp) if (rp_locks) erts_smp_proc_unlock(rp, rp_locks); - erts_smp_proc_dec_refc(rp); + erts_proc_dec_refc(rp); if (erts_smp_atomic32_dec_read_nob(&swtrp->refc) == 0) swtreq_free(vswtrp); @@ -730,13 +1163,16 @@ reply_sched_wall_time(void *vswtrp) Eterm erts_sched_wall_time_request(Process *c_p, int set, int enable) { - ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(c_p); + ErtsSchedulerData *esdp = erts_proc_sched_data(c_p); Eterm ref; ErtsSchedWallTimeReq *swtrp; Eterm *hp; if (!set && !esdp->sched_wall_time.enabled) return THE_NON_VALUE; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); +#endif swtrp = swtreq_alloc(); ref = erts_make_ref(c_p); @@ -750,7 +1186,7 @@ erts_sched_wall_time_request(Process *c_p, int set, int enable) erts_smp_atomic32_init_nob(&swtrp->refc, (erts_aint32_t) erts_no_schedulers); - erts_smp_proc_add_refc(c_p, (Sint32) erts_no_schedulers); + erts_proc_add_refc(c_p, (Sint32) erts_no_schedulers); #ifdef ERTS_SMP if (erts_no_schedulers > 1) @@ -765,6 +1201,75 @@ erts_sched_wall_time_request(Process *c_p, int set, int enable) return ref; } +static void +reply_system_check(void *vscrp) +{ + ErtsSchedulerData *esdp = erts_get_scheduler_data(); + ErtsSystemCheckReq *scrp = (ErtsSystemCheckReq *) vscrp; + ErtsProcLocks rp_locks = (scrp->req_sched == esdp->no ? ERTS_PROC_LOCK_MAIN : 0); + Process *rp = scrp->proc; + Eterm msg; + Eterm *hp = NULL; + Eterm **hpp; + Uint sz; + ErlOffHeap *ohp = NULL; + ErtsMessage *mp = NULL; + + ASSERT(esdp); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); +#endif + + sz = REF_THING_SIZE; + mp = erts_alloc_message_heap(rp, &rp_locks, sz, &hp, &ohp); + hpp = &hp; + msg = STORE_NC(hpp, ohp, scrp->ref); + + erts_queue_message(rp, rp_locks, mp, msg, am_system); + + if (scrp->req_sched == esdp->no) + rp_locks &= ~ERTS_PROC_LOCK_MAIN; + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + + erts_proc_dec_refc(rp); + + if (erts_smp_atomic32_dec_read_nob(&scrp->refc) == 0) + screq_free(vscrp); +} + + +Eterm erts_system_check_request(Process *c_p) { + ErtsSchedulerData *esdp = erts_proc_sched_data(c_p); + Eterm ref; + ErtsSystemCheckReq *scrp; + Eterm *hp; + + scrp = screq_alloc(); + ref = erts_make_ref(c_p); + hp = &scrp->ref_heap[0]; + + scrp->proc = c_p; + scrp->ref = STORE_NC(&hp, NULL, ref); + scrp->req_sched = esdp->no; + erts_smp_atomic32_init_nob(&scrp->refc, (erts_aint32_t) erts_no_schedulers); + + erts_proc_add_refc(c_p, (Sint) erts_no_schedulers); + +#ifdef ERTS_SMP + if (erts_no_schedulers > 1) + erts_schedule_multi_misc_aux_work(1, + erts_no_schedulers, + reply_system_check, + (void *) scrp); +#endif + + reply_system_check((void *) scrp); + + return ref; +} + static ERTS_INLINE ErtsProcList * proclist_create(Process *p) { @@ -775,6 +1280,15 @@ proclist_create(Process *p) return plp; } +static ERTS_INLINE ErtsProcList * +proclist_copy(ErtsProcList *plp0) +{ + ErtsProcList *plp1 = proclist_alloc(); + plp1->pid = plp0->pid; + plp1->started_interval = plp0->started_interval; + return plp1; +} + static ERTS_INLINE void proclist_destroy(ErtsProcList *plp) { @@ -782,6 +1296,12 @@ proclist_destroy(ErtsProcList *plp) } ErtsProcList * +erts_proclist_copy(ErtsProcList *plp) +{ + return proclist_copy(plp); +} + +ErtsProcList * erts_proclist_create(Process *p) { return proclist_create(p); @@ -794,46 +1314,25 @@ erts_proclist_destroy(ErtsProcList *plp) } void * -erts_psd_set_init(Process *p, ErtsProcLocks plocks, int ix, void *data) +erts_psd_set_init(Process *p, int ix, void *data) { void *old; - ErtsProcLocks xplocks; - int refc = 0; - ErtsPSD *psd = erts_alloc(ERTS_ALC_T_PSD, sizeof(ErtsPSD)); + ErtsPSD *psd, *new_psd; int i; - for (i = 0; i < ERTS_PSD_SIZE; i++) - psd->data[i] = NULL; - ERTS_SMP_LC_ASSERT(plocks); - ERTS_SMP_LC_ASSERT(plocks == erts_proc_lc_my_proc_locks(p)); + new_psd = erts_alloc(ERTS_ALC_T_PSD, sizeof(ErtsPSD)); + for (i = 0; i < ERTS_PSD_SIZE; i++) + new_psd->data[i] = NULL; - xplocks = ERTS_PROC_LOCKS_ALL; - xplocks &= ~plocks; - if (xplocks && erts_smp_proc_trylock(p, xplocks) == EBUSY) { - if (xplocks & ERTS_PROC_LOCK_MAIN) { - erts_smp_proc_inc_refc(p); - erts_smp_proc_unlock(p, plocks); - erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL); - refc = 1; - } - else { - if (plocks & ERTS_PROC_LOCKS_ALL_MINOR) - erts_smp_proc_unlock(p, plocks & ERTS_PROC_LOCKS_ALL_MINOR); - erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR); - } - } - if (!p->psd) - p->psd = psd; - if (xplocks) - erts_smp_proc_unlock(p, xplocks); - if (refc) - erts_smp_proc_dec_refc(p); - ASSERT(p->psd); - if (p->psd != psd) - erts_free(ERTS_ALC_T_PSD, psd); - old = p->psd->data[ix]; - p->psd->data[ix] = data; - ERTS_SMP_LC_ASSERT(plocks == erts_proc_lc_my_proc_locks(p)); + psd = (ErtsPSD *) erts_smp_atomic_cmpxchg_mb(&p->psd, + (erts_aint_t) new_psd, + (erts_aint_t) NULL); + if (psd) + erts_free(ERTS_ALC_T_PSD, new_psd); + else + psd = new_psd; + old = psd->data[ix]; + psd->data[ix] = data; return old; } @@ -859,7 +1358,7 @@ erts_sched_finish_poke(ErtsSchedulerSleepInfo *ssi, erts_aint32_t flags) case 0: break; default: - erl_exit(ERTS_ABORT_EXIT, "%s:%d: Internal error\n", + erts_exit(ERTS_ABORT_EXIT, "%s:%d: Internal error\n", __FILE__, __LINE__); break; } @@ -876,11 +1375,11 @@ set_aux_work_flags_wakeup_nob(ErtsSchedulerSleepInfo *ssi, ERTS_DBG_CHK_SSI_AUX_WORK(ssi); old_flgs = erts_atomic32_read_nob(&ssi->aux_work); - if ((old_flgs & flgs) == 0) { + if ((old_flgs & flgs) != flgs) { old_flgs = erts_atomic32_read_bor_nob(&ssi->aux_work, flgs); - if ((old_flgs & flgs) == 0) { + if ((old_flgs & flgs) != flgs) { #ifdef ERTS_SMP erts_sched_poke(ssi); #else @@ -900,7 +1399,7 @@ set_aux_work_flags_wakeup_relb(ErtsSchedulerSleepInfo *ssi, old_flgs = erts_atomic32_read_bor_relb(&ssi->aux_work, flgs); - if ((old_flgs & flgs) == 0) { + if ((old_flgs & flgs) != flgs) { #ifdef ERTS_SMP erts_sched_poke(ssi); #else @@ -991,6 +1490,9 @@ static ERTS_INLINE void haw_thr_prgr_current_check_progress(ErtsAuxWorkData *awdp) { ErtsThrPrgrVal current = awdp->current_thr_prgr; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif if (current != ERTS_THR_PRGR_INVALID && !erts_thr_progress_equal(current, erts_thr_progress_current())) { /* @@ -1007,6 +1509,10 @@ handle_delayed_aux_work_wakeup(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, in { int jix, max_jix; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif + ASSERT(awdp->delayed_wakeup.next != ERTS_DELAYED_WAKEUP_INFINITY); if (!waiting && awdp->delayed_wakeup.next > awdp->esdp->reductions) @@ -1162,6 +1668,9 @@ handle_misc_aux_work_thr_prgr(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) { +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif if (!erts_thr_progress_has_reached_this(haw_thr_prgr_current(awdp), awdp->misc.thr_prgr)) return aux_work & ~ERTS_SSI_AUX_WORK_MISC_THR_PRGR; @@ -1214,6 +1723,9 @@ erts_schedule_multi_misc_aux_work(int ignore_self, if (ignore_self) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); +#endif if (esdp) self = (int) esdp->no; } @@ -1243,6 +1755,9 @@ handle_async_ready(ErtsAuxWorkData *awdp, int waiting) { ErtsSchedulerSleepInfo *ssi = awdp->ssi; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_ASYNC_READY); if (erts_check_async_ready(awdp->async_ready.queue)) { if (set_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_ASYNC_READY) @@ -1267,6 +1782,9 @@ handle_async_ready_clean(ErtsAuxWorkData *awdp, { void *thr_prgr_p; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif #ifdef ERTS_SMP if (awdp->async_ready.need_thr_prgr && !erts_thr_progress_has_reached_this(haw_thr_prgr_current(awdp), @@ -1304,6 +1822,9 @@ handle_fix_alloc(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) ErtsSchedulerSleepInfo *ssi = awdp->ssi; erts_aint32_t res; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif unset_aux_work_flags(ssi, (ERTS_SSI_AUX_WORK_FIX_ALLOC_LOWER_LIM | ERTS_SSI_AUX_WORK_FIX_ALLOC_DEALLOC)); aux_work &= ~(ERTS_SSI_AUX_WORK_FIX_ALLOC_LOWER_LIM @@ -1323,7 +1844,7 @@ void erts_alloc_notify_delayed_dealloc(int ix) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); - if (esdp) + if (esdp && !ERTS_SCHEDULER_IS_DIRTY(esdp)) schedule_aux_work_wakeup(&esdp->aux_work_data, ix, ERTS_SSI_AUX_WORK_DD); @@ -1337,7 +1858,7 @@ erts_alloc_ensure_handle_delayed_dealloc_call(int ix) { #ifdef DEBUG ErtsSchedulerData *esdp = erts_get_scheduler_data(); - ASSERT(!esdp || ix == (int) esdp->no); + ASSERT(!esdp || (ERTS_SCHEDULER_IS_DIRTY(esdp) || ix == (int) esdp->no)); #endif set_aux_work_flags_wakeup_nob(ERTS_SCHED_SLEEP_INFO_IX(ix-1), ERTS_SSI_AUX_WORK_DD); @@ -1350,12 +1871,17 @@ handle_delayed_dealloc(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waitin int need_thr_progress = 0; ErtsThrPrgrVal wakeup = ERTS_THR_PRGR_INVALID; int more_work = 0; - + ERTS_MSACC_PUSH_STATE_M_X(); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_DD); + ERTS_MSACC_SET_STATE_CACHED_M_X(ERTS_MSACC_STATE_ALLOC); erts_alloc_scheduler_handle_delayed_dealloc((void *) awdp->esdp, &need_thr_progress, &wakeup, &more_work); + ERTS_MSACC_POP_STATE_M_X(); if (more_work) { if (set_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_DD) & ERTS_SSI_AUX_WORK_DD_THR_PRGR) { @@ -1373,11 +1899,6 @@ handle_delayed_dealloc(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waitin awdp->dd.thr_prgr = wakeup; haw_thr_prgr_soft_wakeup(awdp, wakeup); } - else if (awdp->dd.completed_callback) { - awdp->dd.completed_callback(awdp->dd.completed_arg); - awdp->dd.completed_callback = NULL; - awdp->dd.completed_arg = NULL; - } return aux_work & ~ERTS_SSI_AUX_WORK_DD; } @@ -1390,6 +1911,9 @@ handle_delayed_dealloc_thr_prgr(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, i ErtsThrPrgrVal wakeup = ERTS_THR_PRGR_INVALID; ErtsThrPrgrVal current = haw_thr_prgr_current(awdp); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif if (!erts_thr_progress_has_reached_this(current, awdp->dd.thr_prgr)) return aux_work & ~ERTS_SSI_AUX_WORK_DD_THR_PRGR; @@ -1416,17 +1940,107 @@ handle_delayed_dealloc_thr_prgr(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, i } else { unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_DD_THR_PRGR); - if (awdp->dd.completed_callback) { - awdp->dd.completed_callback(awdp->dd.completed_arg); - awdp->dd.completed_callback = NULL; - awdp->dd.completed_arg = NULL; - } } return aux_work & ~ERTS_SSI_AUX_WORK_DD_THR_PRGR; } /* + * Canceled timers + */ + +void +erts_notify_canceled_timer(ErtsSchedulerData *esdp, int rsid) +{ + ASSERT(esdp && esdp == erts_get_scheduler_data()); + if (esdp && !ERTS_SCHEDULER_IS_DIRTY(esdp)) + schedule_aux_work_wakeup(&esdp->aux_work_data, + rsid, + ERTS_SSI_AUX_WORK_CNCLD_TMRS); + else + set_aux_work_flags_wakeup_relb(ERTS_SCHED_SLEEP_INFO_IX(rsid-1), + ERTS_SSI_AUX_WORK_CNCLD_TMRS); +} + +static ERTS_INLINE erts_aint32_t +handle_canceled_timers(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) +{ + ErtsSchedulerSleepInfo *ssi = awdp->ssi; + int need_thr_progress = 0; + ErtsThrPrgrVal wakeup = ERTS_THR_PRGR_INVALID; + int more_work = 0; + +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif + unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS); + erts_handle_canceled_timers((void *) awdp->esdp, + &need_thr_progress, + &wakeup, + &more_work); + if (more_work) { + if (set_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS) + & ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR) { + unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR); + aux_work &= ~ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR; + } + return aux_work; + } + + if (need_thr_progress) { + if (wakeup == ERTS_THR_PRGR_INVALID) + wakeup = erts_thr_progress_later(awdp->esdp); + awdp->cncld_tmrs.thr_prgr = wakeup; + set_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR); + haw_thr_prgr_soft_wakeup(awdp, wakeup); + } + return aux_work & ~ERTS_SSI_AUX_WORK_CNCLD_TMRS; +} + +static ERTS_INLINE erts_aint32_t +handle_canceled_timers_thr_prgr(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) +{ + ErtsSchedulerSleepInfo *ssi; + int need_thr_progress; + int more_work; + ErtsThrPrgrVal wakeup = ERTS_THR_PRGR_INVALID; + ErtsThrPrgrVal current = haw_thr_prgr_current(awdp); + +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif + if (!erts_thr_progress_has_reached_this(current, awdp->cncld_tmrs.thr_prgr)) + return aux_work & ~ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR; + + ssi = awdp->ssi; + need_thr_progress = 0; + more_work = 0; + + erts_handle_canceled_timers((void *) awdp->esdp, + &need_thr_progress, + &wakeup, + &more_work); + if (more_work) { + set_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS); + unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR); + return ((aux_work & ~ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR) + | ERTS_SSI_AUX_WORK_CNCLD_TMRS); + } + + if (need_thr_progress) { + if (wakeup == ERTS_THR_PRGR_INVALID) + wakeup = erts_thr_progress_later(awdp->esdp); + awdp->cncld_tmrs.thr_prgr = wakeup; + haw_thr_prgr_soft_wakeup(awdp, wakeup); + } + else { + unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR); + } + + return aux_work & ~ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR; +} + +/* * Handle scheduled thread progress later operations. */ #define ERTS_MAX_THR_PRGR_LATER_OPS 50 @@ -1437,6 +2051,9 @@ handle_thr_prgr_later_op(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int wait int lops; ErtsThrPrgrVal current = haw_thr_prgr_current(awdp); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif for (lops = 0; lops < ERTS_MAX_THR_PRGR_LATER_OPS; lops++) { ErtsThrPrgrLaterOp *lop = awdp->later_op.first; if (!erts_thr_progress_has_reached_this(current, lop->later)) @@ -1512,101 +2129,154 @@ erts_schedule_thr_prgr_later_cleanup_op(void (*later_func)(void *), #endif } -#ifdef ERTS_SMP +static ERTS_INLINE erts_aint32_t +handle_debug_wait_completed(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) +{ + ErtsSchedulerSleepInfo *ssi = awdp->ssi; + erts_aint32_t saved_aux_work, flags; + +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); +#endif -static erts_atomic32_t completed_dealloc_count; + flags = awdp->debug.wait_completed.flags; + + if (aux_work & flags) + return aux_work; + + saved_aux_work = erts_atomic32_read_acqb(&ssi->aux_work); + + if (saved_aux_work & flags) + return aux_work & ~ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED; + + awdp->debug.wait_completed.callback(awdp->debug.wait_completed.arg); + + awdp->debug.wait_completed.flags = 0; + awdp->debug.wait_completed.callback = NULL; + awdp->debug.wait_completed.arg = NULL; + + unset_aux_work_flags(ssi, ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED); + + return aux_work & ~ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED; +} + +static erts_atomic32_t debug_wait_completed_count; +static int debug_wait_completed_flags; static void -completed_dealloc(void *vproc) +thr_debug_wait_completed(void *vproc) { - if (erts_atomic32_dec_read_mb(&completed_dealloc_count) == 0) { + if (erts_atomic32_dec_read_mb(&debug_wait_completed_count) == 0) { erts_resume((Process *) vproc, (ErtsProcLocks) 0); - erts_smp_proc_dec_refc((Process *) vproc); + erts_proc_dec_refc((Process *) vproc); } } static void -setup_completed_dealloc(void *vproc) +setup_thr_debug_wait_completed(void *vproc) { ErtsSchedulerData *esdp = erts_get_scheduler_data(); - ErtsAuxWorkData *awdp = (esdp - ? &esdp->aux_work_data - : aux_thread_aux_work_data); - erts_alloc_fix_alloc_shrink(awdp->sched_id, 0); - set_aux_work_flags_wakeup_nob(awdp->ssi, ERTS_SSI_AUX_WORK_DD); - awdp->dd.completed_callback = completed_dealloc; - awdp->dd.completed_arg = vproc; + ErtsAuxWorkData *awdp; + erts_aint32_t wait_flags, aux_work_flags; +#ifdef ERTS_SMP + awdp = esdp ? &esdp->aux_work_data : aux_thread_aux_work_data; +#else + awdp = &esdp->aux_work_data; +#endif + + wait_flags = 0; + aux_work_flags = ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED; + + if (debug_wait_completed_flags & ERTS_DEBUG_WAIT_COMPLETED_DEALLOCATIONS) { + erts_alloc_fix_alloc_shrink(awdp->sched_id, 0); + wait_flags |= (ERTS_SSI_AUX_WORK_DD + | ERTS_SSI_AUX_WORK_DD_THR_PRGR); +#ifdef ERTS_SMP + aux_work_flags |= ERTS_SSI_AUX_WORK_DD; +#endif + } + + if (debug_wait_completed_flags & ERTS_DEBUG_WAIT_COMPLETED_TIMER_CANCELLATIONS) { + wait_flags |= (ERTS_SSI_AUX_WORK_CNCLD_TMRS + | ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR); +#ifdef ERTS_SMP + if (awdp->esdp && !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)) + aux_work_flags |= ERTS_SSI_AUX_WORK_CNCLD_TMRS; +#endif + } + + set_aux_work_flags_wakeup_nob(awdp->ssi, aux_work_flags); + + awdp->debug.wait_completed.flags = wait_flags; + awdp->debug.wait_completed.callback = thr_debug_wait_completed; + awdp->debug.wait_completed.arg = vproc; } -static void -prep_setup_completed_dealloc(void *vproc) +struct debug_lop { + ErtsThrPrgrLaterOp lop; + Process *proc; +}; + +static void later_thr_debug_wait_completed(void *vlop) { - erts_aint32_t count = (erts_aint32_t) (erts_no_schedulers+1); - if (erts_atomic32_dec_read_mb(&completed_dealloc_count) == count) { - /* scheduler threads */ - erts_schedule_multi_misc_aux_work(0, - erts_no_schedulers, - setup_completed_dealloc, - vproc); - /* aux_thread */ - erts_schedule_misc_aux_work(0, - setup_completed_dealloc, - vproc); + struct debug_lop *lop = vlop; + erts_aint32_t count = (erts_aint32_t) erts_no_schedulers; +#ifdef ERTS_SMP + count += 1; /* aux thread */ +#endif + if (erts_atomic32_dec_read_mb(&debug_wait_completed_count) == count) { + /* scheduler threads */ + erts_schedule_multi_misc_aux_work(0, + erts_no_schedulers, + setup_thr_debug_wait_completed, + lop->proc); +#ifdef ERTS_SMP + /* aux_thread */ + erts_schedule_misc_aux_work(0, + setup_thr_debug_wait_completed, + lop->proc); +#endif } + erts_free(ERTS_ALC_T_DEBUG, lop); +} + + +static void +init_thr_debug_wait_completed(void *vproc) +{ + struct debug_lop* lop = erts_alloc(ERTS_ALC_T_DEBUG, + sizeof(struct debug_lop)); + lop->proc = vproc; + erts_schedule_thr_prgr_later_op(later_thr_debug_wait_completed, lop, &lop->lop); } -#endif /* ERTS_SMP */ int -erts_debug_wait_deallocations(Process *c_p) +erts_debug_wait_completed(Process *c_p, int flags) { -#ifndef ERTS_SMP - erts_alloc_fix_alloc_shrink(1, 0); - return 1; -#else /* Only one process at a time can do this */ - erts_aint32_t count = (erts_aint32_t) (2*(erts_no_schedulers+1)); - if (0 == erts_atomic32_cmpxchg_mb(&completed_dealloc_count, + erts_aint32_t count = (erts_aint32_t) (2*erts_no_schedulers); +#ifdef ERTS_SMP + count += 1; /* aux thread */ +#endif + if (0 == erts_atomic32_cmpxchg_mb(&debug_wait_completed_count, count, 0)) { + debug_wait_completed_flags = flags; erts_suspend(c_p, ERTS_PROC_LOCK_MAIN, NULL); - erts_smp_proc_inc_refc(c_p); - /* scheduler threads */ + erts_proc_inc_refc(c_p); + + /* First flush later-ops on all scheduler threads */ erts_schedule_multi_misc_aux_work(0, erts_no_schedulers, - prep_setup_completed_dealloc, + init_thr_debug_wait_completed, (void *) c_p); - /* aux_thread */ - erts_schedule_misc_aux_work(0, - prep_setup_completed_dealloc, - (void *) c_p); return 1; } return 0; -#endif } -#ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN -void -erts_smp_notify_check_children_needed(void) -{ - int i; - for (i = 0; i < erts_no_schedulers; i++) - set_aux_work_flags_wakeup_nob(ERTS_SCHED_SLEEP_INFO_IX(i), - ERTS_SSI_AUX_WORK_CHECK_CHILDREN); -} - -static ERTS_INLINE erts_aint32_t -handle_check_children(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) -{ - unset_aux_work_flags(awdp->ssi, ERTS_SSI_AUX_WORK_CHECK_CHILDREN); - erts_check_children(); - return aux_work & ~ERTS_SSI_AUX_WORK_CHECK_CHILDREN; -} - -#endif - static void notify_reap_ports_relb(void) { @@ -1649,13 +2319,13 @@ handle_reap_ports(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) ERTS_PORT_SFLG_HALT); erts_smp_atomic32_inc_nob(&erts_halt_progress); if (!(state & (ERTS_PORT_SFLG_EXITING|ERTS_PORT_SFLG_CLOSING))) - erts_deliver_port_exit(prt, prt->common.id, am_killed, 0); + erts_deliver_port_exit(prt, prt->common.id, am_killed, 0, 1); } erts_port_release(prt); } if (erts_smp_atomic32_dec_read_nob(&erts_halt_progress) == 0) { - erl_exit_flush_async(erts_halt_code, ""); + erts_flush_async_exit(erts_halt_code, ""); } } return aux_work & ~ERTS_SSI_AUX_WORK_REAP_PORTS; @@ -1673,11 +2343,35 @@ handle_mseg_cache_check(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiti #endif +#ifdef ERTS_SMP + +static ERTS_INLINE erts_aint32_t +handle_pending_exiters(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) +{ + ErtsProcList *pnd_xtrs; + ErtsRunQueue *rq; + + rq = awdp->esdp->run_queue; + unset_aux_work_flags(awdp->ssi, ERTS_SSI_AUX_WORK_PENDING_EXITERS); + + erts_smp_runq_lock(rq); + pnd_xtrs = rq->procs.pending_exiters; + rq->procs.pending_exiters = NULL; + erts_smp_runq_unlock(rq); + + if (erts_proclist_fetch(&pnd_xtrs, NULL)) + do_handle_pending_exiters(pnd_xtrs); + + return aux_work & ~ERTS_SSI_AUX_WORK_PENDING_EXITERS; +} + +#endif + static ERTS_INLINE erts_aint32_t handle_setup_aux_work_timer(ErtsAuxWorkData *awdp, erts_aint32_t aux_work, int waiting) { unset_aux_work_flags(awdp->ssi, ERTS_SSI_AUX_WORK_SET_TMO); - setup_aux_work_timer(); + setup_aux_work_timer(awdp->esdp); return aux_work & ~ERTS_SSI_AUX_WORK_SET_TMO; } @@ -1692,13 +2386,17 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) ERTS_DBG_CHK_AUX_WORK_VAL(aux_work); \ if (!(aux_work & ~ignore)) { \ ERTS_DBG_CHK_AUX_WORK_VAL(aux_work); \ + ERTS_MSACC_UPDATE_CACHE(); \ + ERTS_MSACC_POP_STATE_M(); \ return aux_work; \ } \ } erts_aint32_t aux_work = orig_aux_work; erts_aint32_t ignore = 0; + ERTS_MSACC_PUSH_AND_SET_STATE_M(ERTS_MSACC_STATE_AUX); + ASSERT(!awdp->esdp || !ERTS_SCHEDULER_IS_DIRTY(awdp->esdp)); #ifdef ERTS_SMP haw_thr_prgr_current_reset(awdp); #endif @@ -1737,6 +2435,11 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) #ifdef ERTS_SMP HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_THR_PRGR_LATER_OP, handle_thr_prgr_later_op); + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_CNCLD_TMRS, + handle_canceled_timers); + /* CNCLD_TMRS must be before CNCLD_TMRS_THR_PRGR */ + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_CNCLD_TMRS_THR_PRGR, + handle_canceled_timers_thr_prgr); #endif #if ERTS_USE_ASYNC_READY_Q @@ -1755,9 +2458,9 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_MISC, handle_misc_aux_work); -#ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN - HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_CHECK_CHILDREN, - handle_check_children); +#ifdef ERTS_SMP + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_PENDING_EXITERS, + handle_pending_exiters); #endif HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_SET_TMO, @@ -1771,6 +2474,14 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_REAP_PORTS, handle_reap_ports); + /* + * ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED *need* to be + * the last flag checked! + */ + + HANDLE_AUX_WORK(ERTS_SSI_AUX_WORK_DEBUG_WAIT_COMPLETED, + handle_debug_wait_completed); + ERTS_DBG_CHK_AUX_WORK_VAL(aux_work); #ifdef ERTS_SMP @@ -1778,6 +2489,8 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) haw_thr_prgr_current_check_progress(awdp); #endif + ERTS_MSACC_UPDATE_CACHE(); + ERTS_MSACC_POP_STATE_M(); return aux_work; #undef HANDLE_AUX_WORK @@ -1786,8 +2499,8 @@ handle_aux_work(ErtsAuxWorkData *awdp, erts_aint32_t orig_aux_work, int waiting) typedef struct { union { - ErlTimer data; - char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(ErlTimer))]; + ErtsTWheelTimer data; + char align__[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(ErtsTWheelTimer))]; } timer; int initialized; @@ -1797,6 +2510,22 @@ typedef struct { static ErtsAuxWorkTmo *aux_work_tmo; +static ERTS_INLINE void +start_aux_work_timer(ErtsSchedulerData *esdp) +{ + ErtsMonotonicTime tmo = erts_get_monotonic_time(esdp); + tmo = ERTS_MONOTONIC_TO_CLKTCKS(tmo-1); + tmo += ERTS_MSEC_TO_CLKTCKS(1000) + 1; + erts_twheel_init_timer(&aux_work_tmo->timer.data); + ASSERT(esdp); + erts_twheel_set_timer(esdp->timer_wheel, + &aux_work_tmo->timer.data, + aux_work_timeout, + NULL, + (void *) esdp, + tmo); +} + static void aux_work_timeout_early_init(int no_schedulers) { @@ -1811,6 +2540,9 @@ aux_work_timeout_early_init(int no_schedulers) p = (UWord) malloc((sizeof(ErtsAuxWorkTmo) + sizeof(erts_atomic32_t)*(no_schedulers+1)) + ERTS_CACHE_LINE_SIZE-1); + if (!p) { + ERTS_INTERNAL_ERROR("malloc failed to allocate memory!"); + } if (p & ERTS_CACHE_LINE_MASK) p = (p & ~ERTS_CACHE_LINE_MASK) + ERTS_CACHE_LINE_SIZE; ASSERT((p & ERTS_CACHE_LINE_MASK) == 0); @@ -1826,18 +2558,12 @@ void aux_work_timeout_late_init(void) { aux_work_tmo->initialized = 1; - if (erts_atomic32_read_nob(&aux_work_tmo->refc)) { - aux_work_tmo->timer.data.active = 0; - erts_set_timer(&aux_work_tmo->timer.data, - aux_work_timeout, - NULL, - NULL, - 1000); - } + if (erts_atomic32_read_nob(&aux_work_tmo->refc)) + start_aux_work_timer(erts_get_scheduler_data()); } static void -aux_work_timeout(void *unused) +aux_work_timeout(void *vesdp) { erts_aint32_t refc; int i; @@ -1860,32 +2586,18 @@ aux_work_timeout(void *unused) if (refc != 1 || 1 != erts_atomic32_cmpxchg_relb(&aux_work_tmo->refc, 0, 1)) { /* Setup next timeout... */ - aux_work_tmo->timer.data.active = 0; - erts_set_timer(&aux_work_tmo->timer.data, - aux_work_timeout, - NULL, - NULL, - 1000); + start_aux_work_timer((ErtsSchedulerData *) vesdp); } } static void -setup_aux_work_timer(void) +setup_aux_work_timer(ErtsSchedulerData *esdp) { -#ifndef ERTS_SMP - if (!erts_get_scheduler_data()) + if (!esdp || !esdp->timer_wheel) set_aux_work_flags_wakeup_nob(ERTS_SCHED_SLEEP_INFO_IX(0), ERTS_SSI_AUX_WORK_SET_TMO); else -#endif - { - aux_work_tmo->timer.data.active = 0; - erts_set_timer(&aux_work_tmo->timer.data, - aux_work_timeout, - NULL, - NULL, - 1000); - } + start_aux_work_timer(esdp); } erts_aint32_t @@ -1916,7 +2628,7 @@ erts_set_aux_work_timeout(int ix, erts_aint32_t type, int enable) if (refc == 1) { erts_atomic32_inc_acqb(&aux_work_tmo->refc); if (aux_work_tmo->initialized) - setup_aux_work_timer(); + setup_aux_work_timer(erts_get_scheduler_data()); } } return old; @@ -1942,6 +2654,9 @@ static ERTS_INLINE void sched_active_sys(Uint no, ErtsRunQueue *rq) { ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); +#endif ASSERT(rq->waiting < 0); rq->waiting *= -1; rq->waiting--; @@ -1956,7 +2671,6 @@ erts_active_schedulers(void) ERTS_ATOMIC_FOREACH_RUNQ(rq, as -= abs(rq->waiting)); - ASSERT(as >= 0); return as; } @@ -1977,19 +2691,28 @@ try_set_sys_scheduling(void) #endif static ERTS_INLINE int -prepare_for_sys_schedule(void) +prepare_for_sys_schedule(int non_blocking) { + if (non_blocking && erts_eager_check_io) { #ifdef ERTS_SMP - while (!erts_port_task_have_outstanding_io_tasks() - && try_set_sys_scheduling()) { - if (!erts_port_task_have_outstanding_io_tasks()) - return 1; - clear_sys_scheduling(); + return try_set_sys_scheduling(); +#else + return 1; +#endif } - return 0; + else { +#ifdef ERTS_SMP + while (!erts_port_task_have_outstanding_io_tasks() + && try_set_sys_scheduling()) { + if (!erts_port_task_have_outstanding_io_tasks()) + return 1; + clear_sys_scheduling(); + } + return 0; #else - return !erts_port_task_have_outstanding_io_tasks(); + return !erts_port_task_have_outstanding_io_tasks(); #endif + } } #ifdef ERTS_SMP @@ -1998,6 +2721,9 @@ static ERTS_INLINE void sched_change_waiting_sys_to_waiting(Uint no, ErtsRunQueue *rq) { ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); +#endif ASSERT(rq->waiting < 0); rq->waiting *= -1; } @@ -2013,7 +2739,7 @@ sched_waiting(Uint no, ErtsRunQueue *rq) else rq->waiting++; rq->woken = 0; - if (erts_system_profile_flags.scheduler) + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix) && erts_system_profile_flags.scheduler) profile_scheduler(make_small(no), am_inactive); } @@ -2025,22 +2751,14 @@ sched_active(Uint no, ErtsRunQueue *rq) rq->waiting++; else rq->waiting--; - if (erts_system_profile_flags.scheduler) + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix) && erts_system_profile_flags.scheduler) profile_scheduler(make_small(no), am_active); } -static int ERTS_INLINE -ongoing_multi_scheduling_block(void) -{ - ERTS_SMP_LC_ASSERT(erts_lc_mtx_is_locked(&schdlr_sspnd.mtx)); - return schdlr_sspnd.msb.ongoing; -} - static ERTS_INLINE void -empty_runq(ErtsRunQueue *rq) +empty_runq_aux(ErtsRunQueue *rq, Uint32 old_flags) { - Uint32 old_flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_NONEMPTY|ERTS_RUNQ_FLG_PROTECTED); - if (old_flags & ERTS_RUNQ_FLG_NONEMPTY) { + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix) && old_flags & ERTS_RUNQ_FLG_NONEMPTY) { #ifdef DEBUG erts_aint32_t empty = erts_smp_atomic32_read_nob(&no_empty_run_queues); /* @@ -2060,10 +2778,27 @@ empty_runq(ErtsRunQueue *rq) } static ERTS_INLINE void +empty_runq(ErtsRunQueue *rq) +{ + Uint32 old_flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_NONEMPTY|ERTS_RUNQ_FLG_PROTECTED); + empty_runq_aux(rq, old_flags); +} + +static ERTS_INLINE Uint32 +empty_protected_runq(ErtsRunQueue *rq) +{ + Uint32 old_flags = ERTS_RUNQ_FLGS_BSET(rq, + ERTS_RUNQ_FLG_NONEMPTY|ERTS_RUNQ_FLG_PROTECTED, + ERTS_RUNQ_FLG_PROTECTED); + empty_runq_aux(rq, old_flags); + return old_flags; +} + +static ERTS_INLINE void non_empty_runq(ErtsRunQueue *rq) { Uint32 old_flags = ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_NONEMPTY); - if (!(old_flags & ERTS_RUNQ_FLG_NONEMPTY)) { + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix) && (!(old_flags & ERTS_RUNQ_FLG_NONEMPTY))) { #ifdef DEBUG erts_aint32_t empty = erts_smp_atomic32_read_nob(&no_empty_run_queues); /* @@ -2083,6 +2818,18 @@ non_empty_runq(ErtsRunQueue *rq) } } +void +erts_empty_runq(ErtsRunQueue *rq) +{ + empty_runq(rq); +} + +void +erts_non_empty_runq(ErtsRunQueue *rq) +{ + non_empty_runq(rq); +} + static erts_aint32_t sched_prep_spin_wait(ErtsSchedulerSleepInfo *ssi) { @@ -2219,6 +2966,13 @@ thr_prgr_fin_wait(void *vssi) static void init_aux_work_data(ErtsAuxWorkData *awdp, ErtsSchedulerData *esdp, char *dawwp); +void +erts_interupt_aux_thread_timed(ErtsMonotonicTime timeout_time) +{ + /* TODO only poke when needed (based on timeout_time) */ + erts_sched_poke(ERTS_SCHED_SLEEP_INFO_IX(-1)); +} + static void * aux_thread(void *unused) { @@ -2228,8 +2982,17 @@ aux_thread(void *unused) ErtsThrPrgrCallbacks callbacks; int thr_prgr_active = 1; +#ifdef ERTS_ENABLE_LOCK_CHECK + { + char buf[] = "aux_thread"; + erts_lc_set_thread_name(buf); + } +#endif + ssi->event = erts_tse_fetch(); + erts_msacc_init_thread("aux", 1, 1); + callbacks.arg = (void *) ssi; callbacks.wakeup = thr_prgr_wakeup; callbacks.prepare_wait = thr_prgr_prep_wait; @@ -2240,6 +3003,7 @@ aux_thread(void *unused) init_aux_work_data(awdp, NULL, NULL); awdp->ssi = ssi; + sched_prep_spin_wait(ssi); while (1) { @@ -2293,21 +3057,43 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) #ifdef ERTS_SMP int thr_prgr_active = 1; erts_aint32_t flgs; +#endif + ERTS_MSACC_PUSH_STATE_M(); +#ifdef ERTS_SMP ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) + erts_smp_spin_lock(&rq->sleepers.lock); +#endif flgs = sched_prep_spin_wait(ssi); if (flgs & ERTS_SSI_FLG_SUSPENDED) { /* Go suspend instead... */ +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) + erts_smp_spin_unlock(&rq->sleepers.lock); +#endif return; } +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) { + ssi->prev = NULL; + ssi->next = rq->sleepers.list; + if (rq->sleepers.list) + rq->sleepers.list->prev = ssi; + rq->sleepers.list = ssi; + erts_smp_spin_unlock(&rq->sleepers.lock); + } +#endif + /* * If all schedulers are waiting, one of them *should* * be waiting in erl_sys_schedule() */ - if (!prepare_for_sys_schedule()) { + if (ERTS_SCHEDULER_IS_DIRTY(esdp) || !prepare_for_sys_schedule(0)) { sched_waiting(esdp->no, rq); @@ -2317,45 +3103,96 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) tse_wait: - if (thr_prgr_active != working) + if (!ERTS_SCHEDULER_IS_DIRTY(esdp) && thr_prgr_active != working) sched_wall_time_change(esdp, thr_prgr_active); while (1) { + ErtsMonotonicTime current_time = 0; aux_work = erts_atomic32_read_acqb(&ssi->aux_work); - if (aux_work) { + if (aux_work && !ERTS_SCHEDULER_IS_DIRTY(esdp)) { if (!thr_prgr_active) { erts_thr_progress_active(esdp, thr_prgr_active = 1); sched_wall_time_change(esdp, 1); } aux_work = handle_aux_work(&esdp->aux_work_data, aux_work, 1); + ERTS_MSACC_UPDATE_CACHE(); if (aux_work && erts_thr_progress_update(esdp)) erts_thr_progress_leader_update(esdp); } - if (aux_work) - flgs = erts_smp_atomic32_read_acqb(&ssi->flags); + if (aux_work) { + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + flgs = erts_smp_atomic32_read_acqb(&ssi->flags); + current_time = erts_get_monotonic_time(esdp); + if (current_time >= erts_next_timeout_time(esdp->next_tmo_ref)) { + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } + erts_bump_timers(esdp->timer_wheel, current_time); + } + } + } else { - if (thr_prgr_active) { - erts_thr_progress_active(esdp, thr_prgr_active = 0); - sched_wall_time_change(esdp, 0); + ErtsMonotonicTime timeout_time; + int do_timeout = 0; + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + timeout_time = erts_check_next_timeout_time(esdp); + current_time = erts_get_monotonic_time(esdp); + do_timeout = (current_time >= timeout_time); + } else { + current_time = 0; + timeout_time = ERTS_MONOTONIC_TIME_MAX; } - erts_thr_progress_prepare_wait(esdp); + if (do_timeout) { + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } + } + else { + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + if (thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 0); + sched_wall_time_change(esdp, 0); + } + erts_thr_progress_prepare_wait(esdp); + } - flgs = sched_spin_wait(ssi, spincount); - if (flgs & ERTS_SSI_FLG_SLEEPING) { - ASSERT(flgs & ERTS_SSI_FLG_WAITING); - flgs = sched_set_sleeptype(ssi, ERTS_SSI_FLG_TSE_SLEEPING); + flgs = sched_spin_wait(ssi, spincount); if (flgs & ERTS_SSI_FLG_SLEEPING) { - int res; - ASSERT(flgs & ERTS_SSI_FLG_TSE_SLEEPING); ASSERT(flgs & ERTS_SSI_FLG_WAITING); - do { - res = erts_tse_wait(ssi->event); - } while (res == EINTR); + flgs = sched_set_sleeptype(ssi, ERTS_SSI_FLG_TSE_SLEEPING); + if (flgs & ERTS_SSI_FLG_SLEEPING) { + int res; + ASSERT(flgs & ERTS_SSI_FLG_TSE_SLEEPING); + ASSERT(flgs & ERTS_SSI_FLG_WAITING); + current_time = ERTS_SCHEDULER_IS_DIRTY(esdp) ? 0 : + erts_get_monotonic_time(esdp); + do { + Sint64 timeout; + if (current_time >= timeout_time) + break; + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + timeout = ERTS_MONOTONIC_TO_NSEC(timeout_time + - current_time + - 1) + 1; + } else + timeout = -1; + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_SLEEP); + res = erts_tse_twait(ssi->event, timeout); + ERTS_MSACC_POP_STATE_M(); + current_time = ERTS_SCHEDULER_IS_DIRTY(esdp) ? 0 : + erts_get_monotonic_time(esdp); + } while (res == EINTR); + } } + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) + erts_thr_progress_finalize_wait(esdp); } - erts_thr_progress_finalize_wait(esdp); + if (!ERTS_SCHEDULER_IS_DIRTY(esdp) && current_time >= timeout_time) + erts_bump_timers(esdp->timer_wheel, current_time); } if (!(flgs & ERTS_SSI_FLG_WAITING)) { @@ -2376,7 +3213,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) if (flgs & ~ERTS_SSI_FLG_SUSPENDED) erts_smp_atomic32_read_band_nob(&ssi->flags, ERTS_SSI_FLG_SUSPENDED); - if (!thr_prgr_active) { + if (!ERTS_SCHEDULER_IS_DIRTY(esdp) && !thr_prgr_active) { erts_thr_progress_active(esdp, thr_prgr_active = 1); sched_wall_time_change(esdp, 1); } @@ -2388,14 +3225,15 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) else #endif { - erts_aint_t dt; erts_smp_atomic32_set_relb(&function_calls, 0); *fcalls = 0; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); +#endif sched_waiting_sys(esdp->no, rq); - erts_smp_runq_unlock(rq); ASSERT(working); @@ -2406,18 +3244,26 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) goto sys_aux_work; while (spincount-- > 0) { + ErtsMonotonicTime current_time; sys_poll_aux_work: if (working) sched_wall_time_change(esdp, working = 0); - ASSERT(!erts_port_task_have_outstanding_io_tasks()); + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO); + ASSERT(!erts_port_task_have_outstanding_io_tasks()); + LTTNG2(scheduler_poll, esdp->no, 1); erl_sys_schedule(1); /* Might give us something to do */ - dt = erts_do_time_read_and_reset(); - if (dt) erts_bump_timer(dt); + ERTS_MSACC_POP_STATE_M(); + + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + current_time = erts_get_monotonic_time(esdp); + if (current_time >= erts_next_timeout_time(esdp->next_tmo_ref)) + erts_bump_timers(esdp->timer_wheel, current_time); + } sys_aux_work: #ifndef ERTS_SMP @@ -2425,7 +3271,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) #endif aux_work = erts_atomic32_read_acqb(&ssi->aux_work); - if (aux_work) { + if (aux_work && !ERTS_SCHEDULER_IS_DIRTY(esdp)) { if (!working) sched_wall_time_change(esdp, working = 1); #ifdef ERTS_SMP @@ -2433,6 +3279,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) erts_thr_progress_active(esdp, thr_prgr_active = 1); #endif aux_work = handle_aux_work(&esdp->aux_work_data, aux_work, 1); + ERTS_MSACC_UPDATE_CACHE(); #ifdef ERTS_SMP if (aux_work && erts_thr_progress_update(esdp)) erts_thr_progress_leader_update(esdp); @@ -2440,7 +3287,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) } #ifndef ERTS_SMP - if (rq->len != 0 || rq->misc.start) + if (erts_smp_atomic32_read_dirty(&rq->len) != 0 || rq->misc.start) goto sys_woken; #else flgs = erts_smp_atomic32_read_acqb(&ssi->flags); @@ -2459,7 +3306,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) * Got to check that we still got I/O tasks; otherwise * we have to continue checking for I/O... */ - if (!prepare_for_sys_schedule()) { + if (!prepare_for_sys_schedule(0)) { spincount *= ERTS_SCHED_TSE_SLEEP_SPINCOUNT_FACT; goto tse_wait; } @@ -2481,7 +3328,7 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) * Got to check that we still got I/O tasks; otherwise * we have to wait in erl_sys_schedule() after all... */ - if (!prepare_for_sys_schedule()) { + if (!prepare_for_sys_schedule(0)) { /* * Not allowed to wait in erl_sys_schedule; * do tse wait instead... @@ -2530,13 +3377,21 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq) ASSERT(!erts_port_task_have_outstanding_io_tasks()); + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO); + LTTNG2(scheduler_poll, esdp->no, 0); + erl_sys_schedule(0); - dt = erts_do_time_read_and_reset(); - if (dt) erts_bump_timer(dt); + ERTS_MSACC_POP_STATE_M(); + + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + ErtsMonotonicTime current_time = erts_get_monotonic_time(esdp); + if (current_time >= erts_next_timeout_time(esdp->next_tmo_ref)) + erts_bump_timers(esdp->timer_wheel, current_time); + } #ifndef ERTS_SMP - if (rq->len == 0 && !rq->misc.start) + if (erts_smp_atomic32_read_dirty(&rq->len) == 0 && !rq->misc.start) goto sys_aux_work; sys_woken: #else @@ -2585,7 +3440,7 @@ ssi_flags_set_wake(ErtsSchedulerSleepInfo *ssi) } static void -wake_scheduler(ErtsRunQueue *rq, int incq) +wake_scheduler(ErtsRunQueue *rq) { ErtsSchedulerSleepInfo *ssi; erts_aint32_t flgs; @@ -2598,19 +3453,63 @@ wake_scheduler(ErtsRunQueue *rq, int incq) * so all code *should* handle this without having * the lock on the run queue. */ - ERTS_SMP_LC_ASSERT(!erts_smp_lc_runq_is_locked(rq)); + ERTS_SMP_LC_ASSERT(!erts_smp_lc_runq_is_locked(rq) + || ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); ssi = rq->scheduler->ssi; flgs = ssi_flags_set_wake(ssi); erts_sched_finish_poke(ssi, flgs); +} + +#ifdef ERTS_DIRTY_SCHEDULERS +static void +wake_dirty_schedulers(ErtsRunQueue *rq, int one) +{ + ErtsSchedulerSleepInfo *ssi; + ErtsSchedulerSleepList *sl; + + ASSERT(ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); + + sl = &rq->sleepers; + erts_smp_spin_lock(&sl->lock); + ssi = sl->list; + if (!ssi) { + erts_smp_spin_unlock(&sl->lock); + if (one) + wake_scheduler(rq); + } else if (one) { + erts_aint32_t flgs; + if (ssi->prev) + ssi->prev->next = ssi->next; + else { + ASSERT(sl->list == ssi); + sl->list = ssi->next; + } + if (ssi->next) + ssi->next->prev = ssi->prev; + + erts_smp_spin_unlock(&sl->lock); - if (incq && (flgs & ERTS_SSI_FLG_WAITING)) - non_empty_runq(rq); + ERTS_THR_MEMORY_BARRIER; + flgs = ssi_flags_set_wake(ssi); + erts_sched_finish_poke(ssi, flgs); + } else { + sl->list = NULL; + erts_smp_spin_unlock(&sl->lock); + + ERTS_THR_MEMORY_BARRIER; + do { + ErtsSchedulerSleepInfo *wake_ssi = ssi; + ssi = ssi->next; + erts_sched_finish_poke(wake_ssi, ssi_flags_set_wake(wake_ssi)); + } while (ssi); + } } +#endif #define ERTS_NO_USED_RUNQS_SHIFT 16 -#define ERTS_NO_RUNQS_MASK 0xffff +#define ERTS_NO_RUNQS_MASK 0xffffU #if ERTS_MAX_NO_OF_SCHEDULERS > ERTS_NO_RUNQS_MASK # error "Too large amount of schedulers allowed" @@ -2692,12 +3591,12 @@ chk_wake_sched(ErtsRunQueue *crq, int ix, int activate) return 0; wrq = ERTS_RUNQ_IX(ix); flags = ERTS_RUNQ_FLGS_GET(wrq); + if (activate && !(flags & ERTS_RUNQ_FLG_SUSPENDED)) { + if (try_inc_no_active_runqs(ix+1)) + (void) ERTS_RUNQ_FLGS_UNSET(wrq, ERTS_RUNQ_FLG_INACTIVE); + } if (!(flags & (ERTS_RUNQ_FLG_SUSPENDED|ERTS_RUNQ_FLG_NONEMPTY))) { - if (activate) { - if (try_inc_no_active_runqs(ix+1)) - (void) ERTS_RUNQ_FLGS_UNSET(wrq, ERTS_RUNQ_FLG_INACTIVE); - } - wake_scheduler(wrq, 0); + wake_scheduler(wrq); return 1; } return 0; @@ -2744,8 +3643,14 @@ static ERTS_INLINE void smp_notify_inc_runq(ErtsRunQueue *runq) { #ifdef ERTS_SMP - if (runq) - wake_scheduler(runq, 1); + if (runq) { +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(runq->ix)) + wake_dirty_schedulers(runq, 1); + else +#endif + wake_scheduler(runq); + } #endif } @@ -2763,7 +3668,7 @@ erts_sched_notify_check_cpu_bind(void) for (ix = 0; ix < erts_no_run_queues; ix++) { ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); (void) ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_CHK_CPU_BIND); - wake_scheduler(rq, 0); + wake_scheduler(rq); } #else erts_sched_check_cpu_bind(erts_get_scheduler_data()); @@ -2848,7 +3753,7 @@ dequeue_process(ErtsRunQueue *runq, int prio_q, erts_aint32_t *statep) if (statep) *statep = state; - prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state); rqi = &runq->procs.prio_info[prio]; @@ -2874,6 +3779,13 @@ check_requeue_process(ErtsRunQueue *rq, int prio_q) return 0; } +static ERTS_INLINE void +free_proxy_proc(Process *proxy) +{ + ASSERT(erts_smp_atomic32_read_nob(&proxy->state) & ERTS_PSFLG_PROXY); + erts_free(ERTS_ALC_T_PROC, proxy); +} + #ifdef ERTS_SMP static ErtsRunQueue * @@ -2891,6 +3803,11 @@ check_immigration_need(ErtsRunQueue *c_rq, ErtsMigrationPath *mp, int prio) if (!f_rq) return NULL; +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + if (mp->sched_util) + return NULL; +#endif + f_rq_flags = ERTS_RUNQ_FLGS_GET(f_rq); if (f_rq_flags & ERTS_RUNQ_FLG_PROTECTED) return NULL; @@ -2951,7 +3868,7 @@ immigrate(ErtsRunQueue *c_rq, ErtsMigrationPath *mp) prio = ERTS_PORT_PRIO_LEVEL; break; default: - erl_exit(ERTS_ABORT_EXIT, + erts_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Invalid immigrate queue mask", __FILE__, __LINE__, __func__); prio = 0; @@ -2975,7 +3892,7 @@ immigrate(ErtsRunQueue *c_rq, ErtsMigrationPath *mp) rq = erts_port_runq(prt); if (rq) { if (rq != c_rq) - erl_exit(ERTS_ABORT_EXIT, + erts_exit(ERTS_ABORT_EXIT, "%s:%d:%s(): Internal error", __FILE__, __LINE__, __func__); erts_enqueue_port(c_rq, prt); @@ -2997,7 +3914,7 @@ immigrate(ErtsRunQueue *c_rq, ErtsMigrationPath *mp) erts_aint32_t state; state = erts_smp_atomic32_read_acqb(&proc->state); if (!(ERTS_PSFLG_BOUND & state) - && (prio == (int) (ERTS_PSFLG_PRIO_MASK & state))) { + && (prio == (int) ERTS_PSFLGS_GET_PRQ_PRIO(state))) { ErtsRunQueueInfo *rqi = &rq->procs.prio_info[prio]; unqueue_process(rq, rpq, rqi, prio, prev_proc, proc); erts_smp_runq_unlock(rq); @@ -3030,37 +3947,50 @@ suspend_run_queue(ErtsRunQueue *rq) ERTS_SSI_FLG_SUSPENDED); (void) ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_SUSPENDED); - wake_scheduler(rq, 0); + wake_scheduler(rq); } static void scheduler_ix_resume_wake(Uint ix); +static void scheduler_ssi_resume_wake(ErtsSchedulerSleepInfo *ssi); static ERTS_INLINE void resume_run_queue(ErtsRunQueue *rq) { int pix; + Uint32 oflgs; erts_smp_runq_lock(rq); - (void) ERTS_RUNQ_FLGS_READ_BSET(rq, - (ERTS_RUNQ_FLG_OUT_OF_WORK - | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK - | ERTS_RUNQ_FLG_SUSPENDED), - (ERTS_RUNQ_FLG_OUT_OF_WORK - | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK)); + oflgs = ERTS_RUNQ_FLGS_READ_BSET(rq, + (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK + | ERTS_RUNQ_FLG_SUSPENDED), + (ERTS_RUNQ_FLG_OUT_OF_WORK + | ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK)); + + if (oflgs & ERTS_RUNQ_FLG_SUSPENDED) { + erts_aint32_t len; + + rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; + for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { + len = erts_smp_atomic32_read_dirty(&rq->procs.prio_info[pix].len); + rq->procs.prio_info[pix].max_len = len; + rq->procs.prio_info[pix].reds = 0; + } + len = erts_smp_atomic32_read_dirty(&rq->ports.info.len); + rq->ports.info.max_len = len; + rq->ports.info.reds = 0; + len = erts_smp_atomic32_read_dirty(&rq->len); + rq->max_len = len; - rq->check_balance_reds = ERTS_RUNQ_CALL_CHECK_BALANCE_REDS; - for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) { - rq->procs.prio_info[pix].max_len = 0; - rq->procs.prio_info[pix].reds = 0; } - rq->ports.info.max_len = 0; - rq->ports.info.reds = 0; - rq->max_len = 0; erts_smp_runq_unlock(rq); - scheduler_ix_resume_wake(rq->ix); +#ifdef ERTS_DIRTY_SCHEDULERS + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) +#endif + scheduler_ix_resume_wake(rq->ix); } typedef struct { @@ -3079,11 +4009,38 @@ schedule_bound_processes(ErtsRunQueue *rq, while (proc) { erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state); next = proc->next; - enqueue_process(rq, (int) (ERTS_PSFLG_PRIO_MASK & state), proc); + enqueue_process(rq, (int) ERTS_PSFLGS_GET_PRQ_PRIO(state), proc); proc = next; } } +#ifdef ERTS_DIRTY_SCHEDULERS + +static ERTS_INLINE void +clear_proc_dirty_queue_bit(Process *p, ErtsRunQueue *rq, int prio_bit) +{ +#ifdef DEBUG + erts_aint32_t old; +#endif + erts_aint32_t qb = prio_bit; + if (rq == ERTS_DIRTY_CPU_RUNQ) + qb <<= ERTS_PDSFLGS_IN_CPU_PRQ_MASK_OFFSET; + else { + ASSERT(rq == ERTS_DIRTY_IO_RUNQ); + qb <<= ERTS_PDSFLGS_IN_IO_PRQ_MASK_OFFSET; + } +#ifdef DEBUG + old = (int) +#else + (void) +#endif + erts_smp_atomic32_read_band_mb(&p->dirty_state, ~qb); + ASSERT(old & qb); +} + +#endif /* ERTS_DIRTY_SCHEDULERS */ + + static void evacuate_run_queue(ErtsRunQueue *rq, ErtsStuckBoundProcesses *sbpp) @@ -3091,20 +4048,28 @@ evacuate_run_queue(ErtsRunQueue *rq, int prio_q; ErtsRunQueue *to_rq; ErtsMigrationPaths *mps; - ErtsMigrationPath *mp; + ErtsMigrationPath *mp = NULL; ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); - mps = erts_get_migration_paths_managed(); - mp = &mps->mpath[rq->ix]; +#ifdef ERTS_DIRTY_SCHEDULERS + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) +#endif + { + mps = erts_get_migration_paths_managed(); + mp = &mps->mpath[rq->ix]; + } /* Evacuate scheduled misc ops */ if (rq->misc.start) { ErtsMiscOpList *start, *end; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); +#endif to_rq = mp->misc_evac_runq; if (!to_rq) return; @@ -3122,6 +4087,9 @@ evacuate_run_queue(ErtsRunQueue *rq, to_rq->misc.start = start; to_rq->misc.end = end; + + non_empty_runq(to_rq); + erts_smp_runq_unlock(to_rq); smp_notify_inc_runq(to_rq); erts_smp_runq_lock(to_rq); @@ -3130,6 +4098,9 @@ evacuate_run_queue(ErtsRunQueue *rq, if (rq->ports.start) { Port *prt; +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); +#endif to_rq = mp->prio[ERTS_PORT_PRIO_LEVEL].runq; if (!to_rq) return; @@ -3148,7 +4119,7 @@ evacuate_run_queue(ErtsRunQueue *rq, prt_rq = erts_port_runq(prt); if (prt_rq) { if (prt_rq != to_rq) - erl_exit(ERTS_ABORT_EXIT, + erts_exit(ERTS_ABORT_EXIT, "%s:%d:%s() internal error\n", __FILE__, __LINE__, __func__); erts_enqueue_port(to_rq, prt); @@ -3167,14 +4138,76 @@ evacuate_run_queue(ErtsRunQueue *rq, int notify = 0; to_rq = NULL; - if (!mp->prio[prio_q].runq) - return; - if (prio_q == PRIORITY_NORMAL && !mp->prio[PRIORITY_LOW].runq) - return; +#ifdef ERTS_DIRTY_SCHEDULERS + if (!ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) +#endif + { + if (!mp->prio[prio_q].runq) + return; + if (prio_q == PRIORITY_NORMAL && !mp->prio[PRIORITY_LOW].runq) + return; + } proc = dequeue_process(rq, prio_q, &state); while (proc) { - if (ERTS_PSFLG_BOUND & state) { + Process *real_proc; + int prio; + erts_aint32_t max_qbit, qbit, real_state; + + prio = ERTS_PSFLGS_GET_PRQ_PRIO(state); + qbit = ((erts_aint32_t) 1) << prio; + + if (!(state & ERTS_PSFLG_PROXY)) { + real_proc = proc; + real_state = state; + } + else { + real_proc = erts_proc_lookup_raw(proc->common.id); + if (!real_proc) { + free_proxy_proc(proc); + goto handle_next_proc; + } + real_state = erts_smp_atomic32_read_acqb(&real_proc->state); + } + + max_qbit = (state >> ERTS_PSFLGS_IN_PRQ_MASK_OFFSET); + max_qbit &= ERTS_PSFLGS_QMASK; + max_qbit |= 1 << ERTS_PSFLGS_QMASK_BITS; + max_qbit &= -max_qbit; + + if (qbit > max_qbit) { + /* Process already queued with higher prio; drop it... */ + if (real_proc != proc) + free_proxy_proc(proc); + else { + erts_aint32_t clr_bits; +#ifdef DEBUG + erts_aint32_t old; +#endif + + clr_bits = ERTS_PSFLG_IN_RUNQ; + clr_bits |= qbit << ERTS_PSFLGS_IN_PRQ_MASK_OFFSET; + +#ifdef DEBUG + old = +#else + (void) +#endif + erts_smp_atomic32_read_band_mb(&proc->state, + ~clr_bits); + ASSERT((old & clr_bits) == clr_bits); + + } + + goto handle_next_proc; + } + +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) + clear_proc_dirty_queue_bit(real_proc, rq, qbit); +#endif + + if (ERTS_PSFLG_BOUND & real_state) { /* Bound processes get stuck here... */ proc->next = NULL; if (sbpp->last) @@ -3184,10 +4217,19 @@ evacuate_run_queue(ErtsRunQueue *rq, sbpp->last = proc; } else { - int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + int prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state); erts_smp_runq_unlock(rq); - to_rq = mp->prio[prio].runq; +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) + /* + * dirty run queues evacuate only to run + * queue 0 during multi-scheduling blocking + */ + to_rq = ERTS_RUNQ_IX(0); + else +#endif + to_rq = mp->prio[prio].runq; RUNQ_SET_RQ(&proc->run_queue, to_rq); erts_smp_runq_lock(to_rq); @@ -3197,6 +4239,8 @@ evacuate_run_queue(ErtsRunQueue *rq, erts_smp_runq_lock(rq); } + + handle_next_proc: proc = dequeue_process(rq, prio_q, &state); } if (notify) @@ -3257,7 +4301,7 @@ try_steal_task_from_victim(ErtsRunQueue *rq, int *rq_lockedp, ErtsRunQueue *vrq, erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state); if (!(ERTS_PSFLG_BOUND & state)) { /* Steal process */ - int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); + int prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state); ErtsRunQueueInfo *rqi = &vrq->procs.prio_info[prio]; unqueue_process(vrq, rpq, rqi, prio, prev_proc, proc); erts_smp_runq_unlock(vrq); @@ -3299,7 +4343,7 @@ no_procs: return 0; else { if (prt_rq != rq) - erl_exit(ERTS_ABORT_EXIT, + erts_exit(ERTS_ABORT_EXIT, "%s:%d:%s() internal error\n", __FILE__, __LINE__, __func__); *rq_lockedp = 1; @@ -3334,7 +4378,7 @@ try_steal_task(ErtsRunQueue *rq) Uint32 flags; /* Protect jobs we steal from getting stolen from us... */ - flags = ERTS_RUNQ_FLGS_SET(rq, ERTS_RUNQ_FLG_PROTECTED); + flags = empty_protected_runq(rq); if (flags & ERTS_RUNQ_FLG_SUSPENDED) return 0; /* go suspend instead... */ @@ -3413,6 +4457,9 @@ typedef struct { int full_reds_history_change; int oowc; int max_len; +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + int sched_util; +#endif } ErtsRunQueueBalance; static ErtsRunQueueBalance *run_queue_info; @@ -3576,6 +4623,9 @@ check_balance(ErtsRunQueue *c_rq) Sint64 scheds_reds, full_scheds_reds; int forced, active, current_active, oowc, half_full_scheds, full_scheds, mmax_len, blnc_no_rqs, qix, pix, freds_hist_ix; +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + int sched_util_balancing; +#endif if (erts_smp_atomic32_xchg_nob(&balance_info.checking_balance, 1)) { c_rq->check_balance_reds = INT_MAX; @@ -3631,6 +4681,10 @@ check_balance(ErtsRunQueue *c_rq) return; } +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + sched_util_balancing = 0; +#endif + freds_hist_ix = balance_info.full_reds_history_index; balance_info.full_reds_history_index++; if (balance_info.full_reds_history_index >= ERTS_FULL_REDS_HISTORY_SIZE) @@ -3661,7 +4715,12 @@ check_balance(ErtsRunQueue *c_rq) run_queue_info[qix].oowc = rq->out_of_work_count; run_queue_info[qix].max_len = rq->max_len; rq->check_balance_reds = INT_MAX; - + +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + if (erts_sched_balance_util) + run_queue_info[qix].sched_util = erts_get_sched_util(rq, 1, 0); +#endif + erts_smp_runq_unlock(rq); } @@ -3731,8 +4790,38 @@ check_balance(ErtsRunQueue *c_rq) mmax_len = run_queue_info[qix].max_len; } - if (!erts_sched_compact_load) + if (!erts_sched_compact_load) { +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + if (erts_sched_balance_util && full_scheds < blnc_no_rqs) { + int avg_util = 0; + + for (qix = 0; qix < blnc_no_rqs; qix++) + avg_util += run_queue_info[qix].sched_util; + + avg_util /= blnc_no_rqs; /* in ppm */ + + sched_util_balancing = 1; + /* + * In order to avoid renaming a large amount of fields + * we write utilization values instead of lenght values + * in the 'max_len' and 'migration_limit' fields... + */ + for (qix = 0; qix < blnc_no_rqs; qix++) { + run_queue_info[qix].flags = 0; /* Reset for later use... */ + for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { + run_queue_info[qix].prio[pix].emigrate_to = -1; + run_queue_info[qix].prio[pix].immigrate_from = -1; + run_queue_info[qix].prio[pix].avail = 100; + run_queue_info[qix].prio[pix].max_len = run_queue_info[qix].sched_util; + run_queue_info[qix].prio[pix].migration_limit = avg_util; + } + } + active = blnc_no_rqs; + goto setup_migration_paths; + } +#endif goto all_active; + } if (!forced && half_full_scheds != blnc_no_rqs) { int min = 1; @@ -3849,15 +4938,30 @@ check_balance(ErtsRunQueue *c_rq) } } +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + setup_migration_paths: +#endif + /* Setup migration paths for all priorities */ for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { int low = 0, high = 0; for (qix = 0; qix < blnc_no_rqs; qix++) { int len_diff = run_queue_info[qix].prio[pix].max_len; len_diff -= run_queue_info[qix].prio[pix].migration_limit; + #ifdef DBG_PRINT if (pix == 2) erts_fprintf(stderr, "%d ", len_diff); #endif + +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + if (sched_util_balancing + && -ERTS_SCHED_UTIL_IGNORE_IMBALANCE_DIFF <= len_diff + && len_diff <= ERTS_SCHED_UTIL_IGNORE_IMBALANCE_DIFF) { + /* ignore minor imbalance */ + len_diff = 0; + } +#endif + run_queue_compare[qix].qix = qix; run_queue_compare[qix].len = len_diff; if (len_diff != 0) { @@ -3984,6 +5088,9 @@ erts_fprintf(stderr, "--------------------------------\n"); Uint32 flags = run_queue_info[qix].flags; ErtsMigrationPath *mp = &new_mpaths->mpath[qix]; +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + mp->sched_util = sched_util_balancing; +#endif mp->flags = flags; mp->misc_evac_runq = NULL; @@ -4068,7 +5175,7 @@ erts_fprintf(stderr, "--------------------------------\n"); rq->out_of_work_count = 0; (void) ERTS_RUNQ_FLGS_READ_BSET(rq, ERTS_RUNQ_FLGS_MIGRATION_INFO, flags); - rq->max_len = rq->len; + rq->max_len = erts_smp_atomic32_read_dirty(&rq->len); for (pix = 0; pix < ERTS_NO_PRIO_LEVELS; pix++) { ErtsRunQueueInfo *rqi; rqi = (pix == ERTS_PORT_PRIO_LEVEL @@ -4226,7 +5333,7 @@ wakeup_other_check(ErtsRunQueue *rq, Uint32 flags) { int wo_reds = rq->wakeup_other_reds; if (wo_reds) { - int left_len = rq->len - 1; + int left_len = erts_smp_atomic32_read_dirty(&rq->len) - 1; if (left_len < 1) { int wo_reduce = wo_reds << wakeup_other.dec_shift; wo_reduce &= wakeup_other.dec_mask; @@ -4238,13 +5345,22 @@ wakeup_other_check(ErtsRunQueue *rq, Uint32 flags) rq->wakeup_other += (left_len*wo_reds + ERTS_WAKEUP_OTHER_FIXED_INC); if (rq->wakeup_other > wakeup_other.limit) { - int empty_rqs = - erts_smp_atomic32_read_acqb(&no_empty_run_queues); - if (flags & ERTS_RUNQ_FLG_PROTECTED) - (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); - if (empty_rqs != 0) - wake_scheduler_on_empty_runq(rq); - rq->wakeup_other = 0; +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(rq->ix)) { + if (rq->waiting) { + wake_dirty_schedulers(rq, 1); + } + } else +#endif + { + int empty_rqs = + erts_smp_atomic32_read_acqb(&no_empty_run_queues); + if (flags & ERTS_RUNQ_FLG_PROTECTED) + (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); + if (empty_rqs != 0) + wake_scheduler_on_empty_runq(rq); + rq->wakeup_other = 0; + } } } rq->wakeup_other_reds = 0; @@ -4290,7 +5406,7 @@ wakeup_other_check_legacy(ErtsRunQueue *rq, Uint32 flags) { int wo_reds = rq->wakeup_other_reds; if (wo_reds) { - erts_aint32_t len = rq->len; + erts_aint32_t len = erts_smp_atomic32_read_dirty(&rq->len); if (len < 2) { rq->wakeup_other -= ERTS_WAKEUP_OTHER_DEC_LEGACY*wo_reds; if (rq->wakeup_other < 0) @@ -4386,7 +5502,7 @@ runq_supervisor(void *unused) ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); if (ERTS_RUNQ_FLGS_GET(rq) & ERTS_RUNQ_FLG_NONEMPTY) { erts_smp_runq_lock(rq); - if (rq->len != 0) + if (erts_smp_atomic32_read_dirty(&rq->len) != 0) wake_scheduler_on_empty_runq(rq); /* forced wakeup... */ erts_smp_runq_unlock(rq); } @@ -4525,15 +5641,21 @@ erts_sched_set_wake_cleanup_threshold(char *str) static void init_aux_work_data(ErtsAuxWorkData *awdp, ErtsSchedulerData *esdp, char *dawwp) { - awdp->sched_id = esdp ? (int) esdp->no : 0; + if (!esdp) + awdp->sched_id = 0; +#ifdef ERTS_DIRTY_SCHEDULERS + else if (ERTS_SCHEDULER_IS_DIRTY(esdp)) + awdp->sched_id = (int) ERTS_DIRTY_SCHEDULER_NO(esdp); +#endif + else + awdp->sched_id = (int) esdp->no; awdp->esdp = esdp; awdp->ssi = esdp ? esdp->ssi : NULL; #ifdef ERTS_SMP awdp->latest_wakeup = ERTS_THR_PRGR_VAL_FIRST; awdp->misc.thr_prgr = ERTS_THR_PRGR_VAL_WAITING; awdp->dd.thr_prgr = ERTS_THR_PRGR_VAL_WAITING; - awdp->dd.completed_callback = NULL; - awdp->dd.completed_arg = NULL; + awdp->cncld_tmrs.thr_prgr = ERTS_THR_PRGR_VAL_WAITING; awdp->later_op.thr_prgr = ERTS_THR_PRGR_VAL_FIRST; awdp->later_op.size = 0; awdp->later_op.first = NULL; @@ -4563,43 +5685,148 @@ init_aux_work_data(ErtsAuxWorkData *awdp, ErtsSchedulerData *esdp, char *dawwp) awdp->delayed_wakeup.sched2jix[i] = -1; } #endif + awdp->debug.wait_completed.flags = 0; + awdp->debug.wait_completed.callback = NULL; + awdp->debug.wait_completed.arg = NULL; +} + +static void +init_scheduler_data(ErtsSchedulerData* esdp, int num, + ErtsSchedulerSleepInfo* ssi, + ErtsRunQueue* runq, + char** daww_ptr, size_t daww_sz, + Process *shadow_proc) +{ + esdp->timer_wheel = NULL; +#ifdef ERTS_SMP + erts_bits_init_state(&esdp->erl_bits_state); + esdp->match_pseudo_process = NULL; + esdp->free_process = NULL; +#endif + esdp->x_reg_array = + erts_alloc_permanent_cache_aligned(ERTS_ALC_T_BEAM_REGISTER, + ERTS_X_REGS_ALLOCATED * + sizeof(Eterm)); + esdp->f_reg_array = + erts_alloc_permanent_cache_aligned(ERTS_ALC_T_BEAM_REGISTER, + MAX_REG * sizeof(FloatDef)); +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_RUNQ_IX_IS_DIRTY(runq->ix)) { + esdp->no = 0; + ERTS_DIRTY_SCHEDULER_NO(esdp) = (Uint) num; + } + else { + esdp->no = (Uint) num; + ERTS_DIRTY_SCHEDULER_NO(esdp) = 0; + } + esdp->dirty_shadow_process = shadow_proc; + if (shadow_proc) { + erts_init_empty_process(shadow_proc); + erts_smp_atomic32_init_nob(&shadow_proc->state, + (ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_PROXY)); + shadow_proc->static_flags = ERTS_STC_FLG_SHADOW_PROC; + } +#else + esdp->no = (Uint) num; +#endif + + esdp->ssi = ssi; + esdp->current_process = NULL; + esdp->current_port = NULL; + + esdp->virtual_reds = 0; + esdp->cpu_id = -1; + + erts_init_atom_cache_map(&esdp->atom_cache_map); + + esdp->run_queue = runq; + esdp->run_queue->scheduler = esdp; + + esdp->last_monotonic_time = 0; + esdp->check_time_reds = 0; + + esdp->thr_id = (Uint32) num; + erts_sched_bif_unique_init(esdp); + + esdp->io.out = (Uint64) 0; + esdp->io.in = (Uint64) 0; + + if (daww_ptr) { + init_aux_work_data(&esdp->aux_work_data, esdp, *daww_ptr); +#ifdef ERTS_SMP + *daww_ptr += daww_sz; +#endif + } + + esdp->reductions = 0; + + init_sched_wall_time(&esdp->sched_wall_time); + erts_port_task_handle_init(&esdp->nosuspend_port_task_handle); } void -erts_init_scheduling(int no_schedulers, int no_schedulers_online) +erts_init_scheduling(int no_schedulers, int no_schedulers_online +#ifdef ERTS_DIRTY_SCHEDULERS + , int no_dirty_cpu_schedulers, int no_dirty_cpu_schedulers_online, + int no_dirty_io_schedulers +#endif + ) { int ix, n, no_ssi; char *daww_ptr; -#ifdef ERTS_SMP size_t daww_sz; + size_t size_runqs; +#ifdef ERTS_SMP + erts_aint32_t set_schdlr_sspnd_change_flags; #endif init_misc_op_list_alloc(); + init_proc_sys_task_queues_alloc(); #ifdef ERTS_SMP set_wakeup_other_data(); #endif +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + if (erts_sched_balance_util) + erts_sched_compact_load = 0; +#endif + ASSERT(no_schedulers_online <= no_schedulers); ASSERT(no_schedulers_online >= 1); ASSERT(no_schedulers >= 1); +#ifdef ERTS_DIRTY_SCHEDULERS + ASSERT(no_dirty_cpu_schedulers <= no_schedulers); + ASSERT(no_dirty_cpu_schedulers >= 1); + ASSERT(no_dirty_cpu_schedulers_online <= no_schedulers_online); + ASSERT(no_dirty_cpu_schedulers_online >= 1); +#endif /* Create and initialize run queues */ n = no_schedulers; - - erts_aligned_run_queues = - erts_alloc_permanent_cache_aligned(ERTS_ALC_T_RUNQS, - sizeof(ErtsAlignedRunQueue) * n); + size_runqs = sizeof(ErtsAlignedRunQueue) * (n + ERTS_NUM_DIRTY_RUNQS); + erts_aligned_run_queues = + erts_alloc_permanent_cache_aligned(ERTS_ALC_T_RUNQS, size_runqs); #ifdef ERTS_SMP +#ifdef ERTS_DIRTY_SCHEDULERS + erts_aligned_run_queues += ERTS_NUM_DIRTY_RUNQS; +#endif erts_smp_atomic32_init_nob(&no_empty_run_queues, 0); #endif erts_no_run_queues = n; - for (ix = 0; ix < n; ix++) { + for (ix = -(ERTS_NUM_DIRTY_RUNQS); ix < n; ix++) { int pix, rix; +#ifdef ERTS_DIRTY_SCHEDULERS + ErtsRunQueue *rq = ERTS_RUNQ_IX_IS_DIRTY(ix) ? + ERTS_DIRTY_RUNQ_IX(ix) : ERTS_RUNQ_IX(ix); +#else ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); +#endif rq->ix = ix; @@ -4610,6 +5837,14 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) erts_smp_mtx_init_x(&rq->mtx, "run_queue", make_small(ix + 1)); erts_smp_cnd_init(&rq->cnd); +#ifdef ERTS_DIRTY_SCHEDULERS +#ifdef ERTS_SMP + if (ERTS_RUNQ_IX_IS_DIRTY(ix)) + erts_smp_spinlock_init(&rq->sleepers.lock, "dirty_run_queue_sleep_list"); + rq->sleepers.list = NULL; +#endif +#endif + rq->waiting = 0; rq->woken = 0; ERTS_RUNQ_FLGS_INIT(rq, ERTS_RUNQ_FLG_NONEMPTY); @@ -4621,7 +5856,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) } rq->out_of_work_count = 0; rq->max_len = 0; - rq->len = 0; + erts_smp_atomic32_set_nob(&rq->len, 0); rq->wakeup_other = 0; rq->wakeup_other_reds = 0; rq->halt_in_progress = 0; @@ -4648,6 +5883,11 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) rq->ports.info.reds = 0; rq->ports.start = NULL; rq->ports.end = NULL; + +#if ERTS_HAVE_SCHED_UTIL_BALANCING_SUPPORT + init_runq_sched_util(&rq->sched_util, erts_sched_balance_util); +#endif + } #ifdef ERTS_SMP @@ -4665,6 +5905,10 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) n = (int) no_schedulers; erts_no_schedulers = n; +#ifdef ERTS_DIRTY_SCHEDULERS + erts_no_dirty_cpu_schedulers = no_dirty_cpu_schedulers; + erts_no_dirty_io_schedulers = no_dirty_io_schedulers; +#endif /* Create and initialize scheduler sleep info */ #ifdef ERTS_SMP @@ -4691,6 +5935,29 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) #ifdef ERTS_SMP aligned_sched_sleep_info++; + +#ifdef ERTS_DIRTY_SCHEDULERS + aligned_dirty_cpu_sched_sleep_info = + erts_alloc_permanent_cache_aligned( + ERTS_ALC_T_SCHDLR_SLP_INFO, + no_dirty_cpu_schedulers*sizeof(ErtsAlignedSchedulerSleepInfo)); + for (ix = 0; ix < no_dirty_cpu_schedulers; ix++) { + ErtsSchedulerSleepInfo *ssi = &aligned_dirty_cpu_sched_sleep_info[ix].ssi; + erts_smp_atomic32_init_nob(&ssi->flags, 0); + ssi->event = NULL; /* initialized in sched_dirty_cpu_thread_func */ + erts_atomic32_init_nob(&ssi->aux_work, 0); + } + aligned_dirty_io_sched_sleep_info = + erts_alloc_permanent_cache_aligned( + ERTS_ALC_T_SCHDLR_SLP_INFO, + no_dirty_io_schedulers*sizeof(ErtsAlignedSchedulerSleepInfo)); + for (ix = 0; ix < no_dirty_io_schedulers; ix++) { + ErtsSchedulerSleepInfo *ssi = &aligned_dirty_io_sched_sleep_info[ix].ssi; + erts_smp_atomic32_init_nob(&ssi->flags, 0); + ssi->event = NULL; /* initialized in sched_dirty_io_thread_func */ + erts_atomic32_init_nob(&ssi->aux_work, 0); + } +#endif #endif /* Create and initialize scheduler specific data */ @@ -4701,6 +5968,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) daww_ptr = erts_alloc_permanent_cache_aligned(ERTS_ALC_T_SCHDLR_DATA, daww_sz*n); #else + daww_sz = 0; daww_ptr = NULL; #endif @@ -4710,69 +5978,56 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) for (ix = 0; ix < n; ix++) { ErtsSchedulerData *esdp = ERTS_SCHEDULER_IX(ix); -#ifdef ERTS_SMP - erts_bits_init_state(&esdp->erl_bits_state); - esdp->match_pseudo_process = NULL; - esdp->free_process = NULL; -#endif - esdp->x_reg_array = - erts_alloc_permanent_cache_aligned(ERTS_ALC_T_BEAM_REGISTER, - ERTS_X_REGS_ALLOCATED * - sizeof(Eterm)); - esdp->f_reg_array = - erts_alloc_permanent_cache_aligned(ERTS_ALC_T_BEAM_REGISTER, - MAX_REG * sizeof(FloatDef)); -#if !HEAP_ON_C_STACK - esdp->num_tmp_heap_used = 0; -#endif - esdp->no = (Uint) ix+1; - esdp->ssi = ERTS_SCHED_SLEEP_INFO_IX(ix); - esdp->current_process = NULL; - esdp->current_port = NULL; - - esdp->virtual_reds = 0; - esdp->cpu_id = -1; - - erts_init_atom_cache_map(&esdp->atom_cache_map); - - esdp->run_queue = ERTS_RUNQ_IX(ix); - esdp->run_queue->scheduler = esdp; - - init_aux_work_data(&esdp->aux_work_data, esdp, daww_ptr); -#ifdef ERTS_SMP - daww_ptr += daww_sz; -#endif + init_scheduler_data(esdp, ix+1, ERTS_SCHED_SLEEP_INFO_IX(ix), + ERTS_RUNQ_IX(ix), &daww_ptr, daww_sz, + NULL); + } - esdp->reductions = 0; +#ifdef ERTS_DIRTY_SCHEDULERS + { + int dirty_scheds = no_dirty_cpu_schedulers + no_dirty_io_schedulers; + int adspix = 0; + ErtsAlignedDirtyShadowProcess *adsp = + erts_alloc_permanent_cache_aligned( + ERTS_ALC_T_SCHDLR_DATA, + dirty_scheds * sizeof(ErtsAlignedDirtyShadowProcess)); + + erts_aligned_dirty_cpu_scheduler_data = + erts_alloc_permanent_cache_aligned( + ERTS_ALC_T_SCHDLR_DATA, + dirty_scheds * sizeof(ErtsAlignedSchedulerData)); - init_sched_wall_time(&esdp->sched_wall_time); - erts_port_task_handle_init(&esdp->nosuspend_port_task_handle); + erts_aligned_dirty_io_scheduler_data = + &erts_aligned_dirty_cpu_scheduler_data[no_dirty_cpu_schedulers]; + for (ix = 0; ix < no_dirty_cpu_schedulers; ix++) { + ErtsSchedulerData *esdp = ERTS_DIRTY_CPU_SCHEDULER_IX(ix); + init_scheduler_data(esdp, ix+1, ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix), + ERTS_DIRTY_CPU_RUNQ, NULL, 0, + &adsp[adspix++].dsp); + } + for (ix = 0; ix < no_dirty_io_schedulers; ix++) { + ErtsSchedulerData *esdp = ERTS_DIRTY_IO_SCHEDULER_IX(ix); + init_scheduler_data(esdp, ix+1, ERTS_DIRTY_IO_SCHED_SLEEP_INFO_IX(ix), + ERTS_DIRTY_IO_RUNQ, NULL, 0, + &adsp[adspix++].dsp); + } } +#endif init_misc_aux_work(); -#if !HALFWORD_HEAP init_swtreq_alloc(); -#endif + init_screq_alloc(); + erts_atomic32_init_nob(&debug_wait_completed_count, 0); /* debug only */ + debug_wait_completed_flags = 0; #ifdef ERTS_SMP - erts_atomic32_init_nob(&completed_dealloc_count, 0); /* debug only */ - aux_thread_aux_work_data = erts_alloc_permanent_cache_aligned(ERTS_ALC_T_SCHDLR_DATA, sizeof(ErtsAuxWorkData)); - erts_smp_mtx_init(&schdlr_sspnd.mtx, "schdlr_sspnd"); - erts_smp_cnd_init(&schdlr_sspnd.cnd); - - erts_smp_atomic32_init_nob(&schdlr_sspnd.changing, 0); - schdlr_sspnd.online = no_schedulers_online; - schdlr_sspnd.curr_online = no_schedulers; - schdlr_sspnd.msb.ongoing = 0; - erts_smp_atomic32_init_nob(&schdlr_sspnd.active, no_schedulers); - schdlr_sspnd.msb.procs = NULL; init_no_runqs(no_schedulers_online, no_schedulers_online); balance_info.last_active_runqs = no_schedulers; erts_smp_mtx_init(&balance_info.update_mtx, "migration_info_update"); @@ -4787,16 +6042,65 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) init_migration_paths(); - if (no_schedulers_online < no_schedulers) { + init_scheduler_suspend(); + + set_schdlr_sspnd_change_flags = 0; + + schdlr_sspnd_set_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL, + no_schedulers_online); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.curr_online, + ERTS_SCHED_NORMAL, + no_schedulers); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL, + no_schedulers); + + if (no_schedulers_online != no_schedulers) { + ASSERT(no_schedulers_online < no_schedulers); + set_schdlr_sspnd_change_flags |= ERTS_SCHDLR_SSPND_CHNG_ONLN; + schdlr_sspnd.changer = am_init; change_no_used_runqs(no_schedulers_online); for (ix = no_schedulers_online; ix < erts_no_run_queues; ix++) suspend_run_queue(ERTS_RUNQ_IX(ix)); } - schdlr_sspnd.wait_curr_online = no_schedulers_online; - schdlr_sspnd.curr_online *= 2; /* Boot strapping... */ - ERTS_SCHDLR_SSPND_CHNG_SET((ERTS_SCHDLR_SSPND_CHNG_ONLN - | ERTS_SCHDLR_SSPND_CHNG_WAITER), 0); +#ifdef ERTS_DIRTY_SCHEDULERS + + schdlr_sspnd_set_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_CPU, + no_dirty_cpu_schedulers_online); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.curr_online, + ERTS_SCHED_DIRTY_CPU, + no_dirty_cpu_schedulers); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_DIRTY_CPU, + no_dirty_cpu_schedulers); + + if (no_dirty_cpu_schedulers_online != no_dirty_cpu_schedulers) { + ASSERT(no_dirty_cpu_schedulers_online < no_dirty_cpu_schedulers); + set_schdlr_sspnd_change_flags |= ERTS_SCHDLR_SSPND_CHNG_DCPU_ONLN; + for (ix = no_dirty_cpu_schedulers_online; ix < no_dirty_cpu_schedulers; ix++) { + ErtsSchedulerData* esdp = ERTS_DIRTY_CPU_SCHEDULER_IX(ix); + erts_smp_atomic32_read_bor_nob(&esdp->ssi->flags, ERTS_SSI_FLG_SUSPENDED); + } + } + + schdlr_sspnd_set_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_IO, + no_dirty_io_schedulers); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.curr_online, + ERTS_SCHED_DIRTY_IO, + no_dirty_io_schedulers); + schdlr_sspnd_set_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_DIRTY_IO, + no_dirty_io_schedulers); + +#endif + + if (set_schdlr_sspnd_change_flags) + erts_smp_atomic32_set_nob(&schdlr_sspnd.changing, + set_schdlr_sspnd_change_flags); erts_smp_atomic32_init_nob(&doing_sys_schedule, 0); @@ -4812,6 +6116,8 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online) #endif } erts_no_schedulers = 1; + erts_no_dirty_cpu_schedulers = 0; + erts_no_dirty_io_schedulers = 0; #endif erts_smp_atomic32_init_nob(&function_calls, 0); @@ -4858,182 +6164,734 @@ erts_get_scheduler_data(void) #endif +static Process * +make_proxy_proc(Process *prev_proxy, Process *proc, erts_aint32_t prio) +{ + erts_aint32_t state; + Process *proxy; +#ifdef ERTS_SMP + ErtsRunQueue *rq = RUNQ_READ_RQ(&proc->run_queue); +#endif + + state = (ERTS_PSFLG_PROXY + | ERTS_PSFLG_IN_RUNQ + | (((erts_aint32_t) 1) << (prio + ERTS_PSFLGS_IN_PRQ_MASK_OFFSET)) + | (prio << ERTS_PSFLGS_PRQ_PRIO_OFFSET) + | (prio << ERTS_PSFLGS_USR_PRIO_OFFSET) + | (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET)); + + if (prev_proxy) { + proxy = prev_proxy; + ASSERT(erts_smp_atomic32_read_nob(&proxy->state) & ERTS_PSFLG_PROXY); + erts_smp_atomic32_set_nob(&proxy->state, state); +#ifdef ERTS_SMP + RUNQ_SET_RQ(&proc->run_queue, rq); +#endif + } + else { + proxy = erts_alloc(ERTS_ALC_T_PROC, sizeof(Process)); +#ifdef DEBUG + { + int i; + Uint32 *ui32 = (Uint32 *) (char *) proxy; + for (i = 0; i < sizeof(Process)/sizeof(Uint32); i++) + ui32[i] = (Uint32) 0xdeadbeef; + } +#endif + erts_smp_atomic32_init_nob(&proxy->state, state); +#ifdef ERTS_SMP + erts_smp_atomic_init_nob(&proxy->run_queue, + erts_smp_atomic_read_nob(&proc->run_queue)); +#endif + } + + proxy->common.id = proc->common.id; + + return proxy; +} + +#define ERTS_ENQUEUE_NOT 0 +#define ERTS_ENQUEUE_NORMAL_QUEUE 1 +#define ERTS_ENQUEUE_DIRTY_CPU_QUEUE 2 +#define ERTS_ENQUEUE_DIRTY_IO_QUEUE 3 + +#ifdef ERTS_DIRTY_SCHEDULERS + +static int +check_dirty_enqueue_in_prio_queue(Process *c_p, + erts_aint32_t *newp, + erts_aint32_t actual, + erts_aint32_t aprio, + erts_aint32_t qbit) +{ + int queue; + erts_aint32_t dact, max_qbit; + + /* Termination should be done on an ordinary scheduler */ + if ((*newp) & ERTS_PSFLG_EXITING) { + *newp &= ~ERTS_PSFLGS_DIRTY_WORK; + return ERTS_ENQUEUE_NORMAL_QUEUE; + } + + /* + * If we have system tasks, we enqueue on ordinary run-queue + * and take care of those system tasks first. + */ + if ((*newp) & ERTS_PSFLG_ACTIVE_SYS) + return ERTS_ENQUEUE_NORMAL_QUEUE; + + dact = erts_smp_atomic32_read_mb(&c_p->dirty_state); + if (actual & (ERTS_PSFLG_DIRTY_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_CPU_PROC)) { + max_qbit = ((dact >> ERTS_PDSFLGS_IN_CPU_PRQ_MASK_OFFSET) + & ERTS_PDSFLGS_QMASK); + queue = ERTS_ENQUEUE_DIRTY_CPU_QUEUE; + } + else { + ASSERT(actual & ERTS_PSFLG_DIRTY_IO_PROC); + max_qbit = ((dact >> ERTS_PDSFLGS_IN_IO_PRQ_MASK_OFFSET) + & ERTS_PDSFLGS_QMASK); + queue = ERTS_ENQUEUE_DIRTY_IO_QUEUE; + } + + max_qbit |= 1 << ERTS_PSFLGS_QMASK_BITS; + max_qbit &= -max_qbit; + + if (qbit >= max_qbit) + return ERTS_ENQUEUE_NOT; /* Already queued in higher or equal prio */ + if ((actual & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLGS_USR_PRIO_MASK)) + != (aprio << ERTS_PSFLGS_USR_PRIO_OFFSET)) { + /* + * Process struct already enqueued, or actual prio not + * equal to user prio, i.e., enqueue using proxy. + */ + return -1*queue; + } + + *newp |= ERTS_PSFLG_IN_RUNQ; + return queue; +} + +static ERTS_INLINE int +fin_dirty_enq_s_change(Process *p, + int pstruct_reserved, + erts_aint32_t enq_prio, + int qmask_offset) +{ + erts_aint32_t qbit = 1 << enq_prio; + qbit <<= qmask_offset; + + if (qbit & erts_smp_atomic32_read_bor_mb(&p->dirty_state, qbit)) { + /* Already enqueue by someone else... */ + if (pstruct_reserved) { + /* We reserved process struct for enqueue; clear it... */ +#ifdef DEBUG + erts_aint32_t old = +#else + (void) +#endif + erts_smp_atomic32_read_band_nob(&p->state, ~ERTS_PSFLG_IN_RUNQ); + ASSERT(old & ERTS_PSFLG_IN_RUNQ); + } + return 0; + } + + return !0; +} + +#endif /* ERTS_DIRTY_SCHEDULERS */ + +static ERTS_INLINE int +check_enqueue_in_prio_queue(Process *c_p, + erts_aint32_t *prq_prio_p, + erts_aint32_t *newp, + erts_aint32_t actual) +{ + erts_aint32_t aprio, qbit, max_qbit; + + aprio = (actual >> ERTS_PSFLGS_ACT_PRIO_OFFSET) & ERTS_PSFLGS_PRIO_MASK; + qbit = 1 << aprio; + + *prq_prio_p = aprio; + +#ifdef ERTS_DIRTY_SCHEDULERS + if (actual & ERTS_PSFLGS_DIRTY_WORK) { + int res = check_dirty_enqueue_in_prio_queue(c_p, newp, actual, + aprio, qbit); + if (res != ERTS_ENQUEUE_NORMAL_QUEUE) + return res; + } +#endif + + max_qbit = (actual >> ERTS_PSFLGS_IN_PRQ_MASK_OFFSET) & ERTS_PSFLGS_QMASK; + max_qbit |= 1 << ERTS_PSFLGS_QMASK_BITS; + max_qbit &= -max_qbit; + /* + * max_qbit now either contain bit set for highest prio queue or a bit + * out of range (which will have a value larger than valid range). + */ + + if (qbit >= max_qbit) + return ERTS_ENQUEUE_NOT; /* Already queued in higher or equal prio */ + + /* Need to enqueue (if already enqueued, it is in lower prio) */ + *newp |= qbit << ERTS_PSFLGS_IN_PRQ_MASK_OFFSET; + + if ((actual & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLGS_USR_PRIO_MASK)) + != (aprio << ERTS_PSFLGS_USR_PRIO_OFFSET)) { + /* + * Process struct already enqueued, or actual prio not + * equal to user prio, i.e., enqueue using proxy. + */ + return -ERTS_ENQUEUE_NORMAL_QUEUE; + } + + /* + * Enqueue using process struct. + */ + *newp &= ~ERTS_PSFLGS_PRQ_PRIO_MASK; + *newp |= ERTS_PSFLG_IN_RUNQ | (aprio << ERTS_PSFLGS_PRQ_PRIO_OFFSET); + return ERTS_ENQUEUE_NORMAL_QUEUE; +} + +static ERTS_INLINE ErtsRunQueue * +select_enqueue_run_queue(int enqueue, int enq_prio, Process *p, erts_aint32_t state) +{ + + switch (enqueue) { + + case ERTS_ENQUEUE_NOT: + + return NULL; + +#ifdef ERTS_DIRTY_SCHEDULERS + + case ERTS_ENQUEUE_DIRTY_CPU_QUEUE: + case -ERTS_ENQUEUE_DIRTY_CPU_QUEUE: + + if (fin_dirty_enq_s_change(p, enqueue > 0, enq_prio, + ERTS_PDSFLGS_IN_CPU_PRQ_MASK_OFFSET)) + return ERTS_DIRTY_CPU_RUNQ; + + return NULL; + + + case ERTS_ENQUEUE_DIRTY_IO_QUEUE: + case -ERTS_ENQUEUE_DIRTY_IO_QUEUE: + + if (fin_dirty_enq_s_change(p, enqueue > 0, enq_prio, + ERTS_PDSFLGS_IN_IO_PRQ_MASK_OFFSET)) + return ERTS_DIRTY_IO_RUNQ; + + return NULL; + +#endif + + default: { + ErtsRunQueue* runq; + + ASSERT(enqueue == ERTS_ENQUEUE_NORMAL_QUEUE + || enqueue == -ERTS_ENQUEUE_NORMAL_QUEUE); + + runq = erts_get_runq_proc(p); + +#ifdef ERTS_SMP + if (!(ERTS_PSFLG_BOUND & state)) { + ErtsRunQueue *new_runq = erts_check_emigration_need(runq, enq_prio); + if (new_runq) { + RUNQ_SET_RQ(&p->run_queue, new_runq); + runq = new_runq; + } + } +#endif + + ASSERT(runq); + + return runq; + } + } +} + + /* - * scheduler_out_process() return with c_rq locked. + * schedule_out_process() return with c_rq locked. */ static ERTS_INLINE int -schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p) +schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p, + Process *proxy, int is_normal_sched) { - erts_aint32_t a, e, n; - int res = 0; + erts_aint32_t a, e, n, enq_prio = -1, running_flgs; + int enqueue; /* < 0 -> use proxy */ + ErtsRunQueue* runq; + + if (is_normal_sched) + running_flgs = ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS; + else + running_flgs = ERTS_PSFLG_DIRTY_RUNNING|ERTS_PSFLG_DIRTY_RUNNING_SYS; a = state; while (1) { n = e = a; - ASSERT(a & ERTS_PSFLG_RUNNING); - ASSERT(!(a & ERTS_PSFLG_IN_RUNQ)); + ASSERT(a & running_flgs); + + enqueue = ERTS_ENQUEUE_NOT; - n &= ~ERTS_PSFLG_RUNNING; - if ((a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) - n |= ERTS_PSFLG_IN_RUNQ; + n &= ~running_flgs; + if ((a & (ERTS_PSFLG_ACTIVE_SYS|ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + || (a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) { + enqueue = check_enqueue_in_prio_queue(p, &enq_prio, &n, a); + } a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); if (a == e) break; } - if (!(n & ERTS_PSFLG_IN_RUNQ)) { - if (erts_system_profile_flags.runnable_procs) - profile_runnable_proc(p, am_inactive); + runq = select_enqueue_run_queue(enqueue, enq_prio, p, n); + + if (!runq) { + + if (erts_system_profile_flags.runnable_procs) { + + /* Status lock prevents out of order "runnable proc" trace msgs */ + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); + + if (!(a & (ERTS_PSFLG_ACTIVE_SYS|ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + && (!(a & ERTS_PSFLG_ACTIVE) || (a & ERTS_PSFLG_SUSPENDED))) { + /* Process inactive */ + profile_runnable_proc(p, am_inactive); + } + } + + if (proxy) + free_proxy_proc(proxy); + + erts_smp_runq_lock(c_rq); + + return 0; + } else { - int prio = (int) (ERTS_PSFLG_PRIO_MASK & n); - ErtsRunQueue *runq = erts_get_runq_proc(p); + Process* sched_p; - ASSERT(!(n & ERTS_PSFLG_SUSPENDED)); + ASSERT(!(n & ERTS_PSFLG_SUSPENDED) || (n & (ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_ACTIVE_SYS))); -#ifdef ERTS_SMP - if (!(ERTS_PSFLG_BOUND & n)) { - ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio); - if (new_runq) { - RUNQ_SET_RQ(&p->run_queue, new_runq); - runq = new_runq; - } + if (enqueue < 0) + sched_p = make_proxy_proc(proxy, p, enq_prio); + else { + sched_p = p; + if (proxy) + free_proxy_proc(proxy); } -#endif + ASSERT(runq); - res = 1; erts_smp_runq_lock(runq); /* Enqueue the process */ - enqueue_process(runq, prio, p); + enqueue_process(runq, (int) enq_prio, sched_p); if (runq == c_rq) - return res; + return 1; + erts_smp_runq_unlock(runq); + smp_notify_inc_runq(runq); + + erts_smp_runq_lock(c_rq); + + return 1; } - erts_smp_runq_lock(c_rq); - return res; + } static ERTS_INLINE void -add2runq(Process *p, erts_aint32_t state) +add2runq(int enqueue, erts_aint32_t prio, + Process *proc, erts_aint32_t state, + Process **proxy) { - int prio = (int) (ERTS_PSFLG_PRIO_MASK & state); - ErtsRunQueue *runq = erts_get_runq_proc(p); + ErtsRunQueue *runq; -#ifdef ERTS_SMP - if (!(ERTS_PSFLG_BOUND & state)) { - ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio); - if (new_runq) { - RUNQ_SET_RQ(&p->run_queue, new_runq); - runq = new_runq; + runq = select_enqueue_run_queue(enqueue, prio, proc, state); + + if (runq) { + Process *sched_p; + + if (enqueue > 0) + sched_p = proc; + else { + Process *pxy; + + if (!proxy) + pxy = NULL; + else { + pxy = *proxy; + *proxy = NULL; + } + sched_p = make_proxy_proc(pxy, proc, prio); } + + erts_smp_runq_lock(runq); + + /* Enqueue the process */ + enqueue_process(runq, (int) prio, sched_p); + + erts_smp_runq_unlock(runq); + smp_notify_inc_runq(runq); } +} + +static ERTS_INLINE int +change_proc_schedule_state(Process *p, + erts_aint32_t clear_state_flags, + erts_aint32_t set_state_flags, + erts_aint32_t *statep, + erts_aint32_t *enq_prio_p, + ErtsProcLocks locks) +{ + /* + * NOTE: ERTS_PSFLG_RUNNING, ERTS_PSFLG_RUNNING_SYS, + * ERTS_PSFLG_DIRTY_RUNNING, ERTS_PSFLG_DIRTY_RUNNING_SYS + * and ERTS_PSFLG_ACTIVE_SYS are not allowed to be + * altered by this function! + */ + erts_aint32_t a = *statep, n; + int enqueue; /* < 0 -> use proxy */ + unsigned int prof_runnable_procs = erts_system_profile_flags.runnable_procs; + unsigned int lock_status = (prof_runnable_procs + && !(locks & ERTS_PROC_LOCK_STATUS)); + + ERTS_SMP_LC_ASSERT(locks == erts_proc_lc_my_proc_locks(p)); + + ASSERT(!(a & ERTS_PSFLG_PROXY)); + ASSERT((clear_state_flags & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS + | ERTS_PSFLG_ACTIVE_SYS)) == 0); + ASSERT((set_state_flags & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS + | ERTS_PSFLG_ACTIVE_SYS)) == 0); + + if (lock_status) + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + + while (1) { + erts_aint32_t e; + n = e = a; + + enqueue = ERTS_ENQUEUE_NOT; + + if (a & ERTS_PSFLG_FREE) + break; /* We don't want to schedule free processes... */ + + if (clear_state_flags) + n &= ~clear_state_flags; + + if (set_state_flags) + n |= set_state_flags; + + if ((n & (ERTS_PSFLG_SUSPENDED + | ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS + | ERTS_PSFLG_IN_RUNQ + | ERTS_PSFLG_ACTIVE)) == ERTS_PSFLG_ACTIVE +#ifdef ERTS_DIRTY_SCHEDULERS + || (n & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_EXITING)) == ERTS_PSFLG_EXITING #endif - ASSERT(runq); + ) { + /* + * Active and seemingly need to be enqueued, but + * process may be in a run queue via proxy, need + * further inspection... + */ + enqueue = check_enqueue_in_prio_queue(p, enq_prio_p, &n, a); + } + + a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + if (a == e) + break; + if (enqueue == ERTS_ENQUEUE_NOT && n == a) + break; + } - erts_smp_runq_lock(runq); + if (prof_runnable_procs) { - /* Enqueue the process */ - enqueue_process(runq, prio, p); + /* Status lock prevents out of order "runnable proc" trace msgs */ + + if (((n & (ERTS_PSFLG_SUSPENDED + | ERTS_PSFLG_ACTIVE)) == ERTS_PSFLG_ACTIVE) + && (!(a & (ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS) + && (!(a & ERTS_PSFLG_ACTIVE) + || (a & ERTS_PSFLG_SUSPENDED))))) { + /* We activated a prevously inactive process */ + profile_runnable_proc(p, am_active); + } + + if (lock_status) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } - erts_smp_runq_unlock(runq); - smp_notify_inc_runq(runq); + *statep = a; + + return enqueue; } static ERTS_INLINE void -schedule_process(Process *p, erts_aint32_t state, int active_enq) +schedule_process(Process *p, erts_aint32_t in_state, ErtsProcLocks locks) { - erts_aint32_t a = state, n; + erts_aint32_t enq_prio = -1; + erts_aint32_t state = in_state; + int enqueue = change_proc_schedule_state(p, + 0, + ERTS_PSFLG_ACTIVE, + &state, + &enq_prio, + locks); + add2runq(enqueue, enq_prio, p, state, NULL); +} + +void +erts_schedule_process(Process *p, erts_aint32_t state, ErtsProcLocks locks) +{ + schedule_process(p, state, locks); +} + +static int +schedule_process_sys_task(Process *p, erts_aint32_t prio, ErtsProcSysTask *st) +{ + int res; + int locked; + ErtsProcSysTaskQs *stqs, *free_stqs; + erts_aint32_t state, a, n, enq_prio; + int enqueue; /* < 0 -> use proxy */ + unsigned int prof_runnable_procs; + + res = 1; /* prepare for success */ + st->next = st->prev = st; /* Prep for empty prio queue */ + state = erts_smp_atomic32_read_nob(&p->state); + prof_runnable_procs = erts_system_profile_flags.runnable_procs; + locked = 0; + free_stqs = NULL; + if (state & ERTS_PSFLG_ACTIVE_SYS) + stqs = NULL; + else { + alloc_qs: + stqs = proc_sys_task_queues_alloc(); + stqs->qmask = 1 << prio; + stqs->ncount = 0; + stqs->q[PRIORITY_MAX] = NULL; + stqs->q[PRIORITY_HIGH] = NULL; + stqs->q[PRIORITY_NORMAL] = NULL; + stqs->q[PRIORITY_LOW] = NULL; + stqs->q[prio] = st; + } + + if (!locked) { + locked = 1; + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + + state = erts_smp_atomic32_read_nob(&p->state); + if (state & ERTS_PSFLG_EXITING) { + free_stqs = stqs; + res = 0; + goto cleanup; + } + } + + if (!p->sys_task_qs) { + if (stqs) + p->sys_task_qs = stqs; + else + goto alloc_qs; + } + else { + free_stqs = stqs; + stqs = p->sys_task_qs; + if (!stqs->q[prio]) { + stqs->q[prio] = st; + stqs->qmask |= 1 << prio; + } + else { + st->next = stqs->q[prio]; + st->prev = stqs->q[prio]->prev; + st->next->prev = st; + st->prev->next = st; + ASSERT(stqs->qmask & (1 << prio)); + } + } + + if (ERTS_PSFLGS_GET_ACT_PRIO(state) > prio) { + erts_aint32_t n, a, e; + /* Need to elevate actual prio */ + + a = state; + do { + if (ERTS_PSFLGS_GET_ACT_PRIO(a) <= prio) { + n = a; + break; + } + n = e = a; + n &= ~ERTS_PSFLGS_ACT_PRIO_MASK; + n |= (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET); + a = erts_smp_atomic32_cmpxchg_nob(&p->state, n, e); + } while (a != e); + state = n; + } + + + a = state; + enq_prio = -1; + + /* Status lock prevents out of order "runnable proc" trace msgs */ + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); + + if (!prof_runnable_procs) { + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + locked = 0; + } + + ASSERT(!(state & ERTS_PSFLG_PROXY)); while (1) { erts_aint32_t e; n = e = a; if (a & ERTS_PSFLG_FREE) - return; /* We don't want to schedule free processes... */ - n |= ERTS_PSFLG_ACTIVE; - if (!(a & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_RUNNING))) - n |= ERTS_PSFLG_IN_RUNQ; + goto cleanup; /* We don't want to schedule free processes... */ + + enqueue = ERTS_ENQUEUE_NOT; + n |= ERTS_PSFLG_ACTIVE_SYS; + if (!(a & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS))) + enqueue = check_enqueue_in_prio_queue(p, &enq_prio, &n, a); a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); if (a == e) break; - if (!active_enq && (a & ERTS_PSFLG_ACTIVE)) - return; /* Someone else activated process ... */ + if (a == n && enqueue == ERTS_ENQUEUE_NOT) + goto cleanup; } - if (erts_system_profile_flags.runnable_procs - && !(a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) { - profile_runnable_proc(p, am_active); + if (prof_runnable_procs) { + + if (!(a & (ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS)) + && (!(a & ERTS_PSFLG_ACTIVE) || (a & ERTS_PSFLG_SUSPENDED))) { + /* We activated a prevously inactive process */ + profile_runnable_proc(p, am_active); + } + + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + locked = 0; } - if ((n & ERTS_PSFLG_IN_RUNQ) && !(a & ERTS_PSFLG_IN_RUNQ)) - add2runq(p, n); -} + add2runq(enqueue, enq_prio, p, n, NULL); -void -erts_schedule_process(Process *p, erts_aint32_t state) -{ - schedule_process(p, state, 0); +cleanup: + + if (locked) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + + if (free_stqs) + proc_sys_task_queues_free(free_stqs); + + ERTS_SMP_LC_ASSERT(!(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p))); + + return res; } static ERTS_INLINE int suspend_process(Process *c_p, Process *p) { - erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); + erts_aint32_t state; int suspended = 0; ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); + state = erts_smp_atomic32_read_acqb(&p->state); + if ((state & ERTS_PSFLG_SUSPENDED)) suspended = -1; else { if (c_p == p) { state = erts_smp_atomic32_read_bor_relb(&p->state, ERTS_PSFLG_SUSPENDED); - state |= ERTS_PSFLG_SUSPENDED; - ASSERT(state & ERTS_PSFLG_RUNNING); - suspended = 1; + ASSERT(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS)); + suspended = (state & ERTS_PSFLG_SUSPENDED) ? -1: 1; } else { - while (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_EXITING))) { - erts_aint32_t e, n; + while (!(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_EXITING))) { + erts_aint32_t n, e; + n = e = state; n |= ERTS_PSFLG_SUSPENDED; state = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e); if (state == e) { - state = n; suspended = 1; break; } + if (state & ERTS_PSFLG_SUSPENDED) { + suspended = -1; + break; + } } } } - if (state & ERTS_PSFLG_SUSPENDED) { + if (suspended) { + + if (suspended > 0 && erts_system_profile_flags.runnable_procs) { - ASSERT(!(ERTS_PSFLG_RUNNING & state) - || p == erts_get_current_process()); + /* 'state' is before our change... */ + + if ((state & (ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_ACTIVE_SYS + | ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS + | ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) { + /* We made process inactive */ + profile_runnable_proc(p, am_inactive); + } - if (erts_system_profile_flags.runnable_procs - && (p->rcount == 0) - && (state & ERTS_PSFLG_ACTIVE)) { - profile_runnable_proc(p, am_inactive); } p->rcount++; /* count number of suspend */ } + return suspended; } static ERTS_INLINE void -resume_process(Process *p) +resume_process(Process *p, ErtsProcLocks locks) { - erts_aint32_t state; + erts_aint32_t state, enq_prio = -1; + int enqueue; + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); ASSERT(p->rcount > 0); @@ -5041,27 +6899,14 @@ resume_process(Process *p) if (--p->rcount > 0) /* multiple suspend */ return; - state = erts_smp_atomic32_read_band_mb(&p->state, ~ERTS_PSFLG_SUSPENDED); - state &= ~ERTS_PSFLG_SUSPENDED; - if ((state & (ERTS_PSFLG_EXITING - | ERTS_PSFLG_ACTIVE - | ERTS_PSFLG_IN_RUNQ - | ERTS_PSFLG_RUNNING)) == ERTS_PSFLG_ACTIVE) { - schedule_process(p, state, 1); - } -} - -int -erts_get_max_no_executing_schedulers(void) -{ -#ifdef ERTS_SMP - if (erts_smp_atomic32_read_nob(&schdlr_sspnd.changing)) - return (int) erts_no_schedulers; - ERTS_THR_MEMORY_BARRIER; - return (int) erts_smp_atomic32_read_nob(&schdlr_sspnd.active); -#else - return 1; -#endif + state = erts_smp_atomic32_read_nob(&p->state); + enqueue = change_proc_schedule_state(p, + ERTS_PSFLG_SUSPENDED, + 0, + &state, + &enq_prio, + locks); + add2runq(enqueue, enq_prio, p, state, NULL); } #ifdef ERTS_SMP @@ -5070,6 +6915,12 @@ static void scheduler_ix_resume_wake(Uint ix) { ErtsSchedulerSleepInfo *ssi = ERTS_SCHED_SLEEP_INFO_IX(ix); + scheduler_ssi_resume_wake(ssi); +} + +static void +scheduler_ssi_resume_wake(ErtsSchedulerSleepInfo *ssi) +{ erts_aint32_t xflgs = (ERTS_SSI_FLG_SLEEPING | ERTS_SSI_FLG_TSE_SLEEPING | ERTS_SSI_FLG_WAITING @@ -5161,145 +7012,377 @@ sched_set_suspended_sleeptype(ErtsSchedulerSleepInfo *ssi) } static void +init_scheduler_suspend(void) +{ + erts_smp_mtx_init(&schdlr_sspnd.mtx, "schdlr_sspnd"); + schdlr_sspnd.online = ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0); + schdlr_sspnd.curr_online = ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0); + schdlr_sspnd.active = ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0); + erts_smp_atomic32_init_nob(&schdlr_sspnd.changing, 0); + schdlr_sspnd.chngq = NULL; + schdlr_sspnd.changer = am_false; + schdlr_sspnd.nmsb.ongoing = 0; + schdlr_sspnd.nmsb.blckrs = NULL; + schdlr_sspnd.nmsb.chngq = NULL; + schdlr_sspnd.msb.ongoing = 0; + schdlr_sspnd.msb.blckrs = NULL; + schdlr_sspnd.msb.chngq = NULL; +} + +typedef struct { + struct { + Eterm chngr; + Eterm nxt; + } onln; + struct { + ErtsProcList *chngrs; + } msb; +} ErtsSchdlrSspndResume; + +static void +schdlr_sspnd_resume_proc(Eterm pid) +{ + Process *p = erts_pid2proc(NULL, 0, pid, ERTS_PROC_LOCK_STATUS); + if (p) { + resume_process(p, ERTS_PROC_LOCK_STATUS); + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } +} + +static ERTS_INLINE void +schdlr_sspnd_resume_procs(ErtsSchedType sched_type, + ErtsSchdlrSspndResume *resume) +{ + if (is_internal_pid(resume->onln.chngr)) { + schdlr_sspnd_resume_proc(resume->onln.chngr); + resume->onln.chngr = NIL; + } + if (is_internal_pid(resume->onln.nxt)) { + schdlr_sspnd_resume_proc(resume->onln.nxt); + resume->onln.nxt = NIL; + } + while (resume->msb.chngrs) { + ErtsProcList *plp = resume->msb.chngrs; + resume->msb.chngrs = plp->next; + schdlr_sspnd_resume_proc(plp->pid); + proclist_destroy(plp); + } +} + +static void suspend_scheduler(ErtsSchedulerData *esdp) { erts_aint32_t flgs; erts_aint32_t changing; - long no = (long) esdp->no; + long no; ErtsSchedulerSleepInfo *ssi = esdp->ssi; - long active_schedulers; int curr_online = 1; - int wake = 0; + ErtsSchdlrSspndResume resume = {{NIL, NIL}, {NULL}}; erts_aint32_t aux_work; int thr_prgr_active = 1; ErtsStuckBoundProcesses sbp = {NULL, NULL}; + ErtsSchedType sched_type; + erts_aint32_t online_flag; /* * Schedulers may be suspended in two different ways: * - A scheduler may be suspended since it is not online. - * All schedulers with scheduler ids greater than - * schdlr_sspnd.online are suspended. * - Multi scheduling is blocked. All schedulers except the - * scheduler with scheduler id 1 are suspended. + * scheduler with scheduler id 1 are suspended, and all + * dirty CPU and dirty I/O schedulers are suspended. * * Regardless of why a scheduler is suspended, it ends up here. */ - ASSERT(no != 1); +#ifdef ERTS_DIRTY_SCHEDULERS + if (ERTS_SCHEDULER_IS_DIRTY(esdp)) { + no = ERTS_DIRTY_SCHEDULER_NO(esdp); + if (ERTS_RUNQ_IS_DIRTY_CPU_RUNQ(esdp->run_queue)) { + online_flag = ERTS_SCHDLR_SSPND_CHNG_DCPU_ONLN; + sched_type = ERTS_SCHED_DIRTY_CPU; + } + else { + online_flag = 0; + sched_type = ERTS_SCHED_DIRTY_IO; + } + } + else +#endif + { + online_flag = ERTS_SCHDLR_SSPND_CHNG_ONLN; + no = esdp->no; + sched_type = ERTS_SCHED_NORMAL; + } - evacuate_run_queue(esdp->run_queue, &sbp); + ASSERT(sched_type != ERTS_SCHED_NORMAL || no != 1); - erts_smp_runq_unlock(esdp->run_queue); + if (sched_type != ERTS_SCHED_NORMAL) { + if (erts_smp_mtx_trylock(&schdlr_sspnd.mtx) == EBUSY) { + erts_smp_runq_unlock(esdp->run_queue); + erts_smp_mtx_lock(&schdlr_sspnd.mtx); + erts_smp_runq_lock(esdp->run_queue); + } + if (schdlr_sspnd.msb.ongoing) + evacuate_run_queue(esdp->run_queue, &sbp); + erts_smp_runq_unlock(esdp->run_queue); + } + else { + evacuate_run_queue(esdp->run_queue, &sbp); - erts_sched_check_cpu_bind_prep_suspend(esdp); + erts_smp_runq_unlock(esdp->run_queue); - if (erts_system_profile_flags.scheduler) - profile_scheduler(make_small(esdp->no), am_inactive); + erts_sched_check_cpu_bind_prep_suspend(esdp); - sched_wall_time_change(esdp, 0); + if (erts_system_profile_flags.scheduler) + profile_scheduler(make_small(esdp->no), am_inactive); - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + sched_wall_time_change(esdp, 0); + + erts_smp_mtx_lock(&schdlr_sspnd.mtx); + } flgs = sched_prep_spin_suspended(ssi, ERTS_SSI_FLG_SUSPENDED); if (flgs & ERTS_SSI_FLG_SUSPENDED) { - active_schedulers = erts_smp_atomic32_dec_read_nob(&schdlr_sspnd.active); - ASSERT(active_schedulers >= 1); + schdlr_sspnd_dec_nscheds(&schdlr_sspnd.active, sched_type); + + ASSERT(schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL) >= 1); + changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); - if (changing & ERTS_SCHDLR_SSPND_CHNG_MSB) { - if (active_schedulers == schdlr_sspnd.msb.wait_active) - wake = 1; - if (active_schedulers == 1) { - changing = erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, - ~ERTS_SCHDLR_SSPND_CHNG_MSB); - changing &= ~ERTS_SCHDLR_SSPND_CHNG_MSB; - } - } while (1) { - if (changing & ERTS_SCHDLR_SSPND_CHNG_ONLN) { + + if (changing & (ERTS_SCHDLR_SSPND_CHNG_NMSB + | ERTS_SCHDLR_SSPND_CHNG_MSB)) { + int i = 0; + ErtsMultiSchedulingBlock *msb[3] = {0}; + if (changing & ERTS_SCHDLR_SSPND_CHNG_NMSB) + msb[i++] = &schdlr_sspnd.nmsb; + if (changing & ERTS_SCHDLR_SSPND_CHNG_MSB) + msb[i++] = &schdlr_sspnd.msb; + + for (i = 0; msb[i]; i++) { + erts_aint32_t clr_flg = 0; + + if (msb[i] == &schdlr_sspnd.nmsb + && schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL) == 1) { + clr_flg = ERTS_SCHDLR_SSPND_CHNG_NMSB; + } + else if (schdlr_sspnd.active + == ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0)) { + clr_flg = ERTS_SCHDLR_SSPND_CHNG_MSB; + } + + if (clr_flg) { + ErtsProcList *plp, *end_plp; + changing = erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, + ~clr_flg); + changing &= ~clr_flg; + (void) erts_proclist_fetch(&msb[i]->chngq, &end_plp); + /* resume processes that initiated the multi scheduling block... */ + plp = msb[i]->chngq; + while (plp) { + erts_proclist_store_last(&msb[i]->blckrs, + proclist_copy(plp)); + plp = plp->next; + } + if (end_plp) + end_plp->next = resume.msb.chngrs; + resume.msb.chngrs = msb[i]->chngq; + msb[i]->chngq = NULL; + } + } + } + + if (changing & online_flag) { int changed = 0; - if (no > schdlr_sspnd.online && curr_online) { - schdlr_sspnd.curr_online--; + Uint32 st_online; + + st_online = schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + sched_type); + if (no > st_online && curr_online) { + schdlr_sspnd_dec_nscheds(&schdlr_sspnd.curr_online, + sched_type); curr_online = 0; changed = 1; } - else if (no <= schdlr_sspnd.online && !curr_online) { - schdlr_sspnd.curr_online++; + else if (no <= st_online && !curr_online) { + schdlr_sspnd_inc_nscheds(&schdlr_sspnd.curr_online, + sched_type); curr_online = 1; changed = 1; } if (changed - && schdlr_sspnd.curr_online == schdlr_sspnd.wait_curr_online) - wake = 1; - if (schdlr_sspnd.online == schdlr_sspnd.curr_online) { + && (schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + sched_type) + == schdlr_sspnd_get_nscheds(&schdlr_sspnd.curr_online, + sched_type))) { + ErtsProcList *plp; changing = erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, - ~ERTS_SCHDLR_SSPND_CHNG_ONLN); - changing &= ~ERTS_SCHDLR_SSPND_CHNG_ONLN; + ~online_flag); + changing &= ~online_flag; + if (sched_type == ERTS_SCHED_NORMAL) { + ASSERT(is_internal_pid(schdlr_sspnd.changer) + || schdlr_sspnd.changer == am_init); + /* resume process that initiated this change... */ + resume.onln.chngr = schdlr_sspnd.changer; + plp = erts_proclist_peek_first(schdlr_sspnd.chngq); + if (!plp) + schdlr_sspnd.changer = am_false; + else { + schdlr_sspnd.changer = am_true; /* change right in transit */ + /* resume process that is queued for next change... */ + resume.onln.nxt = plp->pid; + ASSERT(is_internal_pid(resume.onln.nxt)); + } + } } } - if (wake) { - erts_smp_cnd_signal(&schdlr_sspnd.cnd); - wake = 0; - } - - if (curr_online && !ongoing_multi_scheduling_block()) { + if (curr_online + && (sched_type == ERTS_SCHED_NORMAL + ? !(schdlr_sspnd.msb.ongoing|schdlr_sspnd.nmsb.ongoing) + : !schdlr_sspnd.msb.ongoing)) { flgs = erts_smp_atomic32_read_acqb(&ssi->flags); if (!(flgs & ERTS_SSI_FLG_SUSPENDED)) break; } erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + schdlr_sspnd_resume_procs(sched_type, &resume); + while (1) { + ErtsMonotonicTime current_time; erts_aint32_t qmask; erts_aint32_t flgs; qmask = (ERTS_RUNQ_FLGS_GET(esdp->run_queue) & ERTS_RUNQ_FLGS_QMASK); - aux_work = erts_atomic32_read_acqb(&ssi->aux_work); - if (aux_work|qmask) { - if (!thr_prgr_active) { - erts_thr_progress_active(esdp, thr_prgr_active = 1); - sched_wall_time_change(esdp, 1); - } - if (aux_work) - aux_work = handle_aux_work(&esdp->aux_work_data, - aux_work, - 1); - if (aux_work && erts_thr_progress_update(esdp)) - erts_thr_progress_leader_update(esdp); + + if (sched_type != ERTS_SCHED_NORMAL) { if (qmask) { + erts_smp_mtx_lock(&schdlr_sspnd.mtx); erts_smp_runq_lock(esdp->run_queue); - evacuate_run_queue(esdp->run_queue, &sbp); + if (schdlr_sspnd.msb.ongoing) + evacuate_run_queue(esdp->run_queue, &sbp); erts_smp_runq_unlock(esdp->run_queue); + erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + } + aux_work = 0; + } + else { + + aux_work = erts_atomic32_read_acqb(&ssi->aux_work); + + if (aux_work|qmask) { + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } + if (aux_work) + aux_work = handle_aux_work(&esdp->aux_work_data, + aux_work, + 1); + + if (aux_work && erts_thr_progress_update(esdp)) + erts_thr_progress_leader_update(esdp); + if (qmask) { + erts_smp_runq_lock(esdp->run_queue); + evacuate_run_queue(esdp->run_queue, &sbp); + erts_smp_runq_unlock(esdp->run_queue); + } } + } - if (!aux_work) { - if (thr_prgr_active) { - erts_thr_progress_active(esdp, thr_prgr_active = 0); - sched_wall_time_change(esdp, 0); + if (aux_work) { + ASSERT(sched_type == ERTS_SCHED_NORMAL); + current_time = erts_get_monotonic_time(esdp); + if (current_time >= erts_next_timeout_time(esdp->next_tmo_ref)) { + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } + erts_bump_timers(esdp->timer_wheel, current_time); } - erts_thr_progress_prepare_wait(esdp); - flgs = sched_spin_suspended(ssi, - ERTS_SCHED_SUSPEND_SLEEP_SPINCOUNT); - if (flgs == (ERTS_SSI_FLG_SLEEPING - | ERTS_SSI_FLG_WAITING - | ERTS_SSI_FLG_SUSPENDED)) { - flgs = sched_set_suspended_sleeptype(ssi); + } + else { + ErtsMonotonicTime timeout_time; + int do_timeout; + + if (sched_type == ERTS_SCHED_NORMAL) { + timeout_time = erts_check_next_timeout_time(esdp); + current_time = erts_get_monotonic_time(esdp); + do_timeout = (current_time >= timeout_time); + } + else { + timeout_time = ERTS_MONOTONIC_TIME_MAX; + current_time = 0; + do_timeout = 0; + } + + if (do_timeout) { + ASSERT(sched_type == ERTS_SCHED_NORMAL); + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } + } + else { + if (sched_type == ERTS_SCHED_NORMAL) { + if (thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 0); + sched_wall_time_change(esdp, 0); + } + erts_thr_progress_prepare_wait(esdp); + } + flgs = sched_spin_suspended(ssi, + ERTS_SCHED_SUSPEND_SLEEP_SPINCOUNT); if (flgs == (ERTS_SSI_FLG_SLEEPING - | ERTS_SSI_FLG_TSE_SLEEPING | ERTS_SSI_FLG_WAITING | ERTS_SSI_FLG_SUSPENDED)) { - int res; - - do { - res = erts_tse_wait(ssi->event); - } while (res == EINTR); + flgs = sched_set_suspended_sleeptype(ssi); + if (flgs == (ERTS_SSI_FLG_SLEEPING + | ERTS_SSI_FLG_TSE_SLEEPING + | ERTS_SSI_FLG_WAITING + | ERTS_SSI_FLG_SUSPENDED)) { + int res; + + if (sched_type == ERTS_SCHED_NORMAL) + current_time = erts_get_monotonic_time(esdp); + else + current_time = 0; + + do { + Sint64 timeout; + if (current_time >= timeout_time) + break; + if (sched_type != ERTS_SCHED_NORMAL) + timeout = -1; + else + timeout = ERTS_MONOTONIC_TO_NSEC(timeout_time + - current_time + - 1) + 1; + res = erts_tse_twait(ssi->event, timeout); + + if (sched_type == ERTS_SCHED_NORMAL) + current_time = erts_get_monotonic_time(esdp); + else + current_time = 0; + + } while (res == EINTR); + } } + if (sched_type == ERTS_SCHED_NORMAL) + erts_thr_progress_finalize_wait(esdp); + } + + if (current_time >= timeout_time) { + ASSERT(sched_type == ERTS_SCHED_NORMAL); + erts_bump_timers(esdp->timer_wheel, current_time); } - erts_thr_progress_finalize_wait(esdp); } flgs = sched_prep_spin_suspended(ssi, (ERTS_SSI_FLG_WAITING @@ -5307,7 +7390,7 @@ suspend_scheduler(ErtsSchedulerData *esdp) if (!(flgs & ERTS_SSI_FLG_SUSPENDED)) break; changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); - if (changing & ~ERTS_SCHDLR_SSPND_CHNG_WAITER) + if (changing) break; } @@ -5315,327 +7398,583 @@ suspend_scheduler(ErtsSchedulerData *esdp) changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); } - active_schedulers = erts_smp_atomic32_inc_read_nob(&schdlr_sspnd.active); + schdlr_sspnd_inc_nscheds(&schdlr_sspnd.active, sched_type); changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); if ((changing & ERTS_SCHDLR_SSPND_CHNG_MSB) - && schdlr_sspnd.online == active_schedulers) { + && schdlr_sspnd.online == schdlr_sspnd.active) { erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, ~ERTS_SCHDLR_SSPND_CHNG_MSB); } - ASSERT(no <= schdlr_sspnd.online); - ASSERT(!ongoing_multi_scheduling_block()); - + ASSERT(no <= schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, sched_type)); + ASSERT((sched_type == ERTS_SCHED_NORMAL + ? !(schdlr_sspnd.msb.ongoing|schdlr_sspnd.nmsb.ongoing) + : !schdlr_sspnd.msb.ongoing)); } erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + ASSERT(!resume.msb.chngrs); + schdlr_sspnd_resume_procs(sched_type, &resume); + ASSERT(curr_online); - if (erts_system_profile_flags.scheduler) - profile_scheduler(make_small(esdp->no), am_active); + if (!ERTS_SCHEDULER_IS_DIRTY(esdp)) { + if (erts_system_profile_flags.scheduler) + profile_scheduler(make_small(esdp->no), am_active); - if (!thr_prgr_active) { - erts_thr_progress_active(esdp, thr_prgr_active = 1); - sched_wall_time_change(esdp, 1); + if (!thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 1); + sched_wall_time_change(esdp, 1); + } } + if (sched_type == ERTS_SCHED_NORMAL) + (void) erts_get_monotonic_time(esdp); erts_smp_runq_lock(esdp->run_queue); non_empty_runq(esdp->run_queue); - schedule_bound_processes(esdp->run_queue, &sbp); + if (sched_type == ERTS_SCHED_NORMAL) { + schedule_bound_processes(esdp->run_queue, &sbp); - erts_sched_check_cpu_bind_post_suspend(esdp); + erts_sched_check_cpu_bind_post_suspend(esdp); + } } -ErtsSchedSuspendResult +void erts_schedulers_state(Uint *total, Uint *online, Uint *active, - int yield_allowed) + Uint *dirty_cpu, + Uint *dirty_cpu_online, + Uint *dirty_cpu_active, + Uint *dirty_io, + Uint *dirty_io_active) +{ + if (active || online || dirty_cpu_online + || dirty_cpu_active || dirty_io_active) { + erts_smp_mtx_lock(&schdlr_sspnd.mtx); + if (active) + *active = schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL); + if (online) + *online = schdlr_sspnd_get_nscheds(&schdlr_sspnd.curr_online, + ERTS_SCHED_NORMAL); + if (dirty_cpu_active) + *dirty_cpu_active = schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_DIRTY_CPU); + if (dirty_cpu_online) + *dirty_cpu_online = schdlr_sspnd_get_nscheds(&schdlr_sspnd.curr_online, + ERTS_SCHED_DIRTY_CPU); + if (dirty_io_active) + *dirty_io_active = schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_DIRTY_IO); + erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + } + + if (total) + *total = erts_no_schedulers; + if (dirty_cpu) + *dirty_cpu = erts_no_dirty_cpu_schedulers; + if (dirty_io) + *dirty_io = erts_no_dirty_io_schedulers; +} + +static void +abort_sched_onln_chng_waitq(Process *p) { - int res; - erts_aint32_t changing; + Eterm resume = NIL; + erts_smp_mtx_lock(&schdlr_sspnd.mtx); - changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); - if (yield_allowed && (changing & ~ERTS_SCHDLR_SSPND_CHNG_WAITER)) - res = ERTS_SCHDLR_SSPND_YIELD_RESTART; - else { - *active = *online = schdlr_sspnd.online; - if (ongoing_multi_scheduling_block()) - *active = 1; - res = ERTS_SCHDLR_SSPND_DONE; + +#ifdef DEBUG + { + int found_it = 0; + ErtsProcList *plp = erts_proclist_peek_first(schdlr_sspnd.chngq); + while (plp) { + if (erts_proclist_same(plp, p)) + found_it++; + plp = erts_proclist_peek_next(schdlr_sspnd.chngq, plp); + } + ASSERT(found_it == !!(p->flags & F_SCHDLR_ONLN_WAITQ)); } +#endif + + if (p->flags & F_SCHDLR_ONLN_WAITQ) { + ErtsProcList *plp = NULL; + + plp = erts_proclist_peek_first(schdlr_sspnd.chngq); + if (plp) { + if (erts_proclist_same(plp, p) + && schdlr_sspnd.changer == am_true) { + p->flags &= ~F_SCHDLR_ONLN_WAITQ; + /* + * Change right was in transit to us; + * transfer it to the next process by + * resuming it... + */ + erts_proclist_remove(&schdlr_sspnd.chngq, plp); + proclist_destroy(plp); + plp = erts_proclist_peek_first(schdlr_sspnd.chngq); + if (plp) + resume = plp->pid; + else + schdlr_sspnd.changer = am_false; + } + else { + do { + if (erts_proclist_same(plp, p)) { + p->flags &= ~F_SCHDLR_ONLN_WAITQ; + erts_proclist_remove(&schdlr_sspnd.chngq, plp); + proclist_destroy(plp); + break; + } + plp = erts_proclist_peek_next(schdlr_sspnd.chngq, plp); + } while (plp); + } + } + } + erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - *total = erts_no_schedulers; - return res; + + if (is_internal_pid(resume)) + schdlr_sspnd_resume_proc(resume); } ErtsSchedSuspendResult erts_set_schedulers_online(Process *p, ErtsProcLocks plocks, Sint new_no, - Sint *old_no) + Sint *old_no, + int dirty_only) { - ErtsSchedulerData *esdp; - int ix, res, no, have_unlocked_plocks, end_wait; - erts_aint32_t changing; + int resume_proc, ix, res = -1, no, have_unlocked_plocks; + erts_aint32_t changing = 0, change_flags; + int online, increase; + ErtsProcList *plp; +#ifdef ERTS_DIRTY_SCHEDULERS + int dirty_no, change_dirty, dirty_online; +#else + ASSERT(!dirty_only); +#endif - if (new_no < 1 || erts_no_schedulers < new_no) + if (new_no < 1) + return ERTS_SCHDLR_SSPND_EINVAL; + else if (dirty_only && erts_no_dirty_cpu_schedulers < new_no) + return ERTS_SCHDLR_SSPND_EINVAL; + else if (erts_no_schedulers < new_no) return ERTS_SCHDLR_SSPND_EINVAL; - esdp = ERTS_PROC_GET_SCHDATA(p); - end_wait = 0; +#ifdef ERTS_DIRTY_SCHEDULERS + if (dirty_only) + resume_proc = 0; + else +#endif + { + resume_proc = 1; + /* + * If we suspend current process we need to suspend before + * requesting the change; otherwise, we got a resume/suspend + * race... + */ + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + suspend_process(p, p); + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } erts_smp_mtx_lock(&schdlr_sspnd.mtx); + change_flags = 0; have_unlocked_plocks = 0; no = (int) new_no; - changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); - if (changing) { - res = ERTS_SCHDLR_SSPND_YIELD_RESTART; - } - else { - int online = *old_no = schdlr_sspnd.online; - if (no == schdlr_sspnd.online) { - res = ERTS_SCHDLR_SSPND_DONE; +#ifdef ERTS_DIRTY_SCHEDULERS + if (!dirty_only) +#endif + { + changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); + if (changing & ERTS_SCHDLR_SSPND_CHNG_ONLN) { + enqueue_wait: + p->flags |= F_SCHDLR_ONLN_WAITQ; + plp = proclist_create(p); + erts_proclist_store_last(&schdlr_sspnd.chngq, plp); + resume_proc = 0; + res = ERTS_SCHDLR_SSPND_YIELD_RESTART; + goto done; + } + plp = erts_proclist_peek_first(schdlr_sspnd.chngq); + if (!plp) { + ASSERT(schdlr_sspnd.changer == am_false); } else { - ERTS_SCHDLR_SSPND_CHNG_SET((ERTS_SCHDLR_SSPND_CHNG_ONLN - | ERTS_SCHDLR_SSPND_CHNG_WAITER), 0); - schdlr_sspnd.online = no; - if (no > online) { - int ix; - schdlr_sspnd.wait_curr_online = no; - if (ongoing_multi_scheduling_block()) { - for (ix = online; ix < no; ix++) - erts_sched_poke(ERTS_SCHED_SLEEP_INFO_IX(ix)); - } - else { - if (plocks) { - have_unlocked_plocks = 1; - erts_smp_proc_unlock(p, plocks); - } - change_no_used_runqs(no); + ASSERT(schdlr_sspnd.changer == am_true); + if (!erts_proclist_same(plp, p)) + goto enqueue_wait; + p->flags &= ~F_SCHDLR_ONLN_WAITQ; + erts_proclist_remove(&schdlr_sspnd.chngq, plp); + proclist_destroy(plp); + } + } - for (ix = online; ix < no; ix++) - resume_run_queue(ERTS_RUNQ_IX(ix)); + *old_no = online = schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL); +#ifndef ERTS_DIRTY_SCHEDULERS + if (no == online) { + res = ERTS_SCHDLR_SSPND_DONE; + goto done; + } +#else /* ERTS_DIRTY_SCHEDULERS */ + dirty_online = schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_CPU); + if (dirty_only) + *old_no = dirty_online; - for (ix = no; ix < erts_no_run_queues; ix++) - suspend_run_queue(ERTS_RUNQ_IX(ix)); - } + ASSERT(dirty_online <= erts_no_dirty_cpu_schedulers); + + if (dirty_only) { + if (no > online) { + res = ERTS_SCHDLR_SSPND_EINVAL; + goto done; + } + dirty_no = no; + if (dirty_no == dirty_online) { + res = ERTS_SCHDLR_SSPND_DONE; + goto done; + } + change_dirty = 1; + } else { + /* + * Adjust the number of dirty CPU schedulers online relative to the + * adjustment made to the number of normal schedulers online. + */ + int total_pct = erts_no_dirty_cpu_schedulers*100/erts_no_schedulers; + int onln_pct = no*total_pct/online; + dirty_no = dirty_online*onln_pct/100; + if (dirty_no == 0) + dirty_no = 1; + ASSERT(dirty_no <= erts_no_dirty_cpu_schedulers); + + if (no != online) + change_dirty = (dirty_no != dirty_online); + else { + dirty_only = 1; + if (dirty_no == dirty_online) { res = ERTS_SCHDLR_SSPND_DONE; + goto done; } - else /* if (no < online) */ { - if (p->scheduler_data->no <= no) { - res = ERTS_SCHDLR_SSPND_DONE; - schdlr_sspnd.wait_curr_online = no; + change_dirty = 1; + } + } + if (change_dirty) { + change_flags |= ERTS_SCHDLR_SSPND_CHNG_DCPU_ONLN; + schdlr_sspnd_set_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_CPU, + dirty_no); + } + + if (dirty_only) + increase = (dirty_no > dirty_online); + else +#endif /* ERTS_DIRTY_SCHEDULERS */ + { + change_flags |= ERTS_SCHDLR_SSPND_CHNG_ONLN; + schdlr_sspnd_set_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL, + no); + increase = (no > online); + } + + erts_smp_atomic32_read_bor_nob(&schdlr_sspnd.changing, change_flags); + + res = ERTS_SCHDLR_SSPND_DONE; + if (increase) { + int ix; +#ifdef ERTS_DIRTY_SCHEDULERS + if (change_dirty) { + ErtsSchedulerSleepInfo* ssi; + if (schdlr_sspnd.msb.ongoing) { + for (ix = dirty_online; ix < dirty_no; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + erts_sched_poke(ssi); } - else { - /* - * Yield! Current process needs to migrate - * before bif returns. - */ - res = ERTS_SCHDLR_SSPND_YIELD_DONE; - schdlr_sspnd.wait_curr_online = no+1; + } else { + for (ix = dirty_online; ix < dirty_no; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + scheduler_ssi_resume_wake(ssi); } - - if (ongoing_multi_scheduling_block()) { - for (ix = no; ix < online; ix++) - erts_sched_poke(ERTS_SCHED_SLEEP_INFO_IX(ix)); + } + } + if (!dirty_only) +#endif + { + if (schdlr_sspnd.msb.ongoing|schdlr_sspnd.nmsb.ongoing) { + for (ix = online; ix < no; ix++) + erts_sched_poke(ERTS_SCHED_SLEEP_INFO_IX(ix)); + } + else { + if (plocks) { + have_unlocked_plocks = 1; + erts_smp_proc_unlock(p, plocks); } - else { - if (plocks) { - have_unlocked_plocks = 1; - erts_smp_proc_unlock(p, plocks); - } + change_no_used_runqs(no); - change_no_used_runqs(no); - for (ix = no; ix < erts_no_run_queues; ix++) - suspend_run_queue(ERTS_RUNQ_IX(ix)); + for (ix = online; ix < no; ix++) + resume_run_queue(ERTS_RUNQ_IX(ix)); - for (ix = no; ix < online; ix++) { - ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - wake_scheduler(rq, 0); - } + for (ix = no; ix < erts_no_run_queues; ix++) + suspend_run_queue(ERTS_RUNQ_IX(ix)); + } + } + } + else /* if decrease */ { +#ifdef ERTS_DIRTY_SCHEDULERS + if (change_dirty) { + ErtsSchedulerSleepInfo* ssi; + if (schdlr_sspnd.msb.ongoing) { + for (ix = dirty_no; ix < dirty_online; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + erts_sched_poke(ssi); + } + } else { + for (ix = dirty_no; ix < dirty_online; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + erts_smp_atomic32_read_bor_nob(&ssi->flags, + ERTS_SSI_FLG_SUSPENDED); } + wake_dirty_schedulers(ERTS_DIRTY_CPU_RUNQ, 0); } - - if (schdlr_sspnd.curr_online != schdlr_sspnd.wait_curr_online) { - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - if (plocks && !have_unlocked_plocks) { + } + if (!dirty_only) +#endif + { + if (schdlr_sspnd.msb.ongoing|schdlr_sspnd.nmsb.ongoing) { + for (ix = no; ix < online; ix++) + erts_sched_poke(ERTS_SCHED_SLEEP_INFO_IX(ix)); + } + else { + if (plocks) { have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); } - erts_thr_progress_active(esdp, 0); - erts_thr_progress_prepare_wait(esdp); - end_wait = 1; - erts_smp_mtx_lock(&schdlr_sspnd.mtx); - } - - while (schdlr_sspnd.curr_online != schdlr_sspnd.wait_curr_online) - erts_smp_cnd_wait(&schdlr_sspnd.cnd, &schdlr_sspnd.mtx); - ASSERT(res != ERTS_SCHDLR_SSPND_DONE - ? (ERTS_SCHDLR_SSPND_CHNG_WAITER - & erts_smp_atomic32_read_nob(&schdlr_sspnd.changing)) - : (ERTS_SCHDLR_SSPND_CHNG_WAITER - == erts_smp_atomic32_read_nob(&schdlr_sspnd.changing))); - erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, - ~ERTS_SCHDLR_SSPND_CHNG_WAITER); + change_no_used_runqs(no); + for (ix = no; ix < erts_no_run_queues; ix++) + suspend_run_queue(ERTS_RUNQ_IX(ix)); + for (ix = no; ix < online; ix++) { + ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); + wake_scheduler(rq); + } + } } } - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - if (end_wait) { - erts_thr_progress_finalize_wait(esdp); - erts_thr_progress_active(esdp, 1); + if (change_flags & ERTS_SCHDLR_SSPND_CHNG_ONLN) { + /* Suspend and wait for requested change to complete... */ + schdlr_sspnd.changer = p->common.id; + resume_proc = 0; + res = ERTS_SCHDLR_SSPND_YIELD_DONE; } + +done: + + ASSERT(schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_CPU) + <= schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL)); + + erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + if (have_unlocked_plocks) erts_smp_proc_lock(p, plocks); + if (resume_proc) { + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + resume_process(p, plocks|ERTS_PROC_LOCK_STATUS); + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } + return res; } ErtsSchedSuspendResult -erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) +erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int normal, int all) { - int ix, res, have_unlocked_plocks = 0; - erts_aint32_t changing; + int resume_proc, ix, res, have_unlocked_plocks = 0; ErtsProcList *plp; +#ifdef ERTS_DIRTY_SCHEDULERS + ErtsSchedulerSleepInfo* ssi; +#endif + ErtsMultiSchedulingBlock *msbp; + erts_aint32_t chng_flg; + int have_blckd_flg; - erts_smp_mtx_lock(&schdlr_sspnd.mtx); - changing = erts_smp_atomic32_read_nob(&schdlr_sspnd.changing); - if (changing) { - res = ERTS_SCHDLR_SSPND_YIELD_RESTART; /* Yield */ + if (normal) { + chng_flg = ERTS_SCHDLR_SSPND_CHNG_NMSB; + have_blckd_flg = F_HAVE_BLCKD_NMSCHED; + msbp = &schdlr_sspnd.nmsb; } - else if (on) { /* ------ BLOCK ------ */ - if (schdlr_sspnd.msb.procs) { + else { + chng_flg = ERTS_SCHDLR_SSPND_CHNG_MSB; + have_blckd_flg = F_HAVE_BLCKD_MSCHED; + msbp = &schdlr_sspnd.msb; + } + + /* + * If we suspend current process we need to suspend before + * requesting the change; otherwise, we got a resume/suspend + * race... + */ + if (!on) { + /* We never suspend current process when unblocking... */ + resume_proc = 0; + } + else { + resume_proc = 1; + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + suspend_process(p, p); + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } + + erts_smp_mtx_lock(&schdlr_sspnd.mtx); + if (on) { /* ------ BLOCK ------ */ + if (msbp->chngq) { + ASSERT(msbp->ongoing); + p->flags |= have_blckd_flg; + goto wait_until_msb; + } + else if (msbp->blckrs) { + ASSERT(msbp->ongoing); plp = proclist_create(p); - erts_proclist_store_last(&schdlr_sspnd.msb.procs, plp); - p->flags |= F_HAVE_BLCKD_MSCHED; - ASSERT(erts_smp_atomic32_read_nob(&schdlr_sspnd.active) == 1); - ASSERT(p->scheduler_data->no == 1); - res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; + erts_proclist_store_last(&msbp->blckrs, plp); + p->flags |= have_blckd_flg; + ASSERT(normal + ? 1 == schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, ERTS_SCHED_NORMAL) + : schdlr_sspnd.active == ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0)); + ASSERT(erts_proc_sched_data(p)->no == 1); + if (schdlr_sspnd.msb.ongoing) + res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; + else + res = ERTS_SCHDLR_SSPND_DONE_NMSCHED_BLOCKED; } else { - int online = schdlr_sspnd.online; - p->flags |= F_HAVE_BLCKD_MSCHED; + int online = (int) schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL); + ASSERT(!msbp->ongoing); + p->flags |= have_blckd_flg; if (plocks) { have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); } - ASSERT(!ongoing_multi_scheduling_block()); - schdlr_sspnd.msb.ongoing = 1; - if (online == 1) { - res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; - ASSERT(erts_smp_atomic32_read_nob(&schdlr_sspnd.active) == 1); - ASSERT(p->scheduler_data->no == 1); + ASSERT(!msbp->ongoing); + msbp->ongoing = 1; + if (schdlr_sspnd.active == ERTS_SCHDLR_SSPND_MAKE_NSCHEDS_VAL(1, 0, 0) + || (normal && schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL) == 1)) { + ASSERT(erts_proc_sched_data(p)->no == 1); + plp = proclist_create(p); + erts_proclist_store_last(&msbp->blckrs, plp); + if (schdlr_sspnd.msb.ongoing) + res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; + else + res = ERTS_SCHDLR_SSPND_DONE_NMSCHED_BLOCKED; } else { - ERTS_SCHDLR_SSPND_CHNG_SET((ERTS_SCHDLR_SSPND_CHNG_MSB - | ERTS_SCHDLR_SSPND_CHNG_WAITER), 0); - if (p->scheduler_data->no == 1) { - res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; - schdlr_sspnd.msb.wait_active = 1; - } - else { - /* - * Yield! Current process needs to migrate - * before bif returns. - */ - res = ERTS_SCHDLR_SSPND_YIELD_DONE_MSCHED_BLOCKED; - schdlr_sspnd.msb.wait_active = 2; - } - + erts_smp_atomic32_read_bor_nob(&schdlr_sspnd.changing, + chng_flg); change_no_used_runqs(1); for (ix = 1; ix < erts_no_run_queues; ix++) suspend_run_queue(ERTS_RUNQ_IX(ix)); for (ix = 1; ix < online; ix++) { ErtsRunQueue *rq = ERTS_RUNQ_IX(ix); - wake_scheduler(rq, 0); + wake_scheduler(rq); } - if (erts_smp_atomic32_read_nob(&schdlr_sspnd.active) - != schdlr_sspnd.msb.wait_active) { - ErtsSchedulerData *esdp; - - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - - if (plocks && !have_unlocked_plocks) { - have_unlocked_plocks = 1; - erts_smp_proc_unlock(p, plocks); +#ifdef ERTS_DIRTY_SCHEDULERS + if (!normal) { + for (ix = 0; ix < erts_no_dirty_cpu_schedulers; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + erts_smp_atomic32_read_bor_nob(&ssi->flags, + ERTS_SSI_FLG_SUSPENDED); } + wake_dirty_schedulers(ERTS_DIRTY_CPU_RUNQ, 0); - esdp = ERTS_PROC_GET_SCHDATA(p); - - erts_thr_progress_active(esdp, 0); - erts_thr_progress_prepare_wait(esdp); - - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + for (ix = 0; ix < erts_no_dirty_io_schedulers; ix++) { + ssi = ERTS_DIRTY_IO_SCHED_SLEEP_INFO_IX(ix); + erts_smp_atomic32_read_bor_nob(&ssi->flags, + ERTS_SSI_FLG_SUSPENDED); + } + wake_dirty_schedulers(ERTS_DIRTY_IO_RUNQ, 0); + } +#endif - while (erts_smp_atomic32_read_nob(&schdlr_sspnd.active) - != schdlr_sspnd.msb.wait_active) - erts_smp_cnd_wait(&schdlr_sspnd.cnd, - &schdlr_sspnd.mtx); - - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); - - erts_thr_progress_active(esdp, 1); - erts_thr_progress_finalize_wait(esdp); + wait_until_msb: - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + ASSERT(chng_flg & erts_smp_atomic32_read_nob(&schdlr_sspnd.changing)); - } - ASSERT(res != ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED - ? (ERTS_SCHDLR_SSPND_CHNG_WAITER - & erts_smp_atomic32_read_nob(&schdlr_sspnd.changing)) - : (ERTS_SCHDLR_SSPND_CHNG_WAITER - == erts_smp_atomic32_read_nob(&schdlr_sspnd.changing))); - erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, - ~ERTS_SCHDLR_SSPND_CHNG_WAITER); + plp = proclist_create(p); + erts_proclist_store_last(&msbp->chngq, plp); + resume_proc = 0; + if (schdlr_sspnd.msb.ongoing) + res = ERTS_SCHDLR_SSPND_YIELD_DONE_MSCHED_BLOCKED; + else + res = ERTS_SCHDLR_SSPND_YIELD_DONE_NMSCHED_BLOCKED; } - plp = proclist_create(p); - erts_proclist_store_last(&schdlr_sspnd.msb.procs, plp); - ASSERT(p->scheduler_data); + ASSERT(erts_proc_sched_data(p)); } } - else if (!ongoing_multi_scheduling_block()) { - /* unblock not ongoing */ - ASSERT(!schdlr_sspnd.msb.procs); - res = ERTS_SCHDLR_SSPND_DONE; + else if (!msbp->ongoing) { + ASSERT(!msbp->blckrs); + goto unblock_res; } else { /* ------ UNBLOCK ------ */ - if (p->flags & F_HAVE_BLCKD_MSCHED) { - ErtsProcList *plp = erts_proclist_peek_first(schdlr_sspnd.msb.procs); - - while (plp) { - ErtsProcList *tmp_plp = plp; - plp = erts_proclist_peek_next(schdlr_sspnd.msb.procs, plp); - if (erts_proclist_same(tmp_plp, p)) { - erts_proclist_remove(&schdlr_sspnd.msb.procs, tmp_plp); - proclist_destroy(tmp_plp); - if (!all) - break; + if (p->flags & have_blckd_flg) { + ErtsProcList *plps[2]; + ErtsProcList *plp; + int limit = 0; + + plps[limit++] = erts_proclist_peek_first(msbp->blckrs); + if (all) + plps[limit++] = erts_proclist_peek_first(msbp->chngq); + + for (ix = 0; ix < limit; ix++) { + plp = plps[ix]; + while (plp) { + ErtsProcList *tmp_plp = plp; + plp = erts_proclist_peek_next(msbp->blckrs, plp); + if (erts_proclist_same(tmp_plp, p)) { + erts_proclist_remove(&msbp->blckrs, tmp_plp); + proclist_destroy(tmp_plp); + if (!all) + break; + } } } } - if (schdlr_sspnd.msb.procs) - res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; - else { - ERTS_SCHDLR_SSPND_CHNG_SET(ERTS_SCHDLR_SSPND_CHNG_MSB, 0); - p->flags &= ~F_HAVE_BLCKD_MSCHED; - schdlr_sspnd.msb.ongoing = 0; - if (schdlr_sspnd.online == 1) { - /* No schedulers to resume */ - ASSERT(erts_smp_atomic32_read_nob(&schdlr_sspnd.active) == 1); - ERTS_SCHDLR_SSPND_CHNG_SET(0, ERTS_SCHDLR_SSPND_CHNG_MSB); + if (!msbp->blckrs && !msbp->chngq) { + int online = (int) schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_NORMAL); + erts_smp_atomic32_read_bor_nob(&schdlr_sspnd.changing, + chng_flg); + p->flags &= ~have_blckd_flg; + msbp->ongoing = 0; + if (online == 1) { + /* No normal schedulers to resume */ + ASSERT(schdlr_sspnd_get_nscheds(&schdlr_sspnd.active, + ERTS_SCHED_NORMAL) == 1); +#ifndef ERTS_DIRTY_SCHEDULERS + erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, + ~chng_flg); +#endif } - else { - int online = schdlr_sspnd.online; + else if (!(schdlr_sspnd.msb.ongoing|schdlr_sspnd.nmsb.ongoing)) { if (plocks) { have_unlocked_plocks = 1; erts_smp_proc_unlock(p, plocks); @@ -5650,63 +7989,92 @@ erts_block_multi_scheduling(Process *p, ErtsProcLocks plocks, int on, int all) for (ix = online; ix < erts_no_run_queues; ix++) suspend_run_queue(ERTS_RUNQ_IX(ix)); } - res = ERTS_SCHDLR_SSPND_DONE; +#ifdef ERTS_DIRTY_SCHEDULERS + if (!normal) { + ASSERT(!schdlr_sspnd.msb.ongoing); + online = (int) schdlr_sspnd_get_nscheds(&schdlr_sspnd.online, + ERTS_SCHED_DIRTY_CPU); + for (ix = 0; ix < online; ix++) { + ssi = ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(ix); + scheduler_ssi_resume_wake(ssi); + } + + for (ix = 0; ix < erts_no_dirty_io_schedulers; ix++) { + ssi = ERTS_DIRTY_IO_SCHED_SLEEP_INFO_IX(ix); + scheduler_ssi_resume_wake(ssi); + } + } +#endif } + + unblock_res: + if (schdlr_sspnd.msb.ongoing) + res = ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED; + else if (schdlr_sspnd.nmsb.ongoing) + res = ERTS_SCHDLR_SSPND_DONE_NMSCHED_BLOCKED; + else + res = ERTS_SCHDLR_SSPND_DONE; } erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + if (have_unlocked_plocks) erts_smp_proc_lock(p, plocks); - return res; -} -#ifdef DEBUG -void -erts_dbg_multi_scheduling_return_trap(Process *p, Eterm return_value) -{ - if (return_value == am_blocked) { - erts_aint32_t active = erts_smp_atomic32_read_nob(&schdlr_sspnd.active); - ASSERT(1 <= active && active <= 2); - ASSERT(ERTS_PROC_GET_SCHDATA(p)->no == 1); + if (resume_proc) { + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + resume_process(p, plocks|ERTS_PROC_LOCK_STATUS); + if (!(plocks & ERTS_PROC_LOCK_STATUS)) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); } + + return res; } -#endif int erts_is_multi_scheduling_blocked(void) { int res; erts_smp_mtx_lock(&schdlr_sspnd.mtx); - res = schdlr_sspnd.msb.procs != NULL; + if (schdlr_sspnd.msb.blckrs) + res = 1; + else if (schdlr_sspnd.nmsb.blckrs) + res = -1; + else + res = 0; erts_smp_mtx_unlock(&schdlr_sspnd.mtx); return res; } Eterm -erts_multi_scheduling_blockers(Process *p) +erts_multi_scheduling_blockers(Process *p, int normal) { Eterm res = NIL; + ErtsMultiSchedulingBlock *msbp; + + msbp = normal ? &schdlr_sspnd.nmsb : &schdlr_sspnd.msb; erts_smp_mtx_lock(&schdlr_sspnd.mtx); - if (!erts_proclist_is_empty(schdlr_sspnd.msb.procs)) { + if (!erts_proclist_is_empty(msbp->blckrs)) { Eterm *hp, *hp_end; ErtsProcList *plp1, *plp2; Uint max_size = 0; - for (plp1 = erts_proclist_peek_first(schdlr_sspnd.msb.procs); + for (plp1 = erts_proclist_peek_first(msbp->blckrs); plp1; - plp1 = erts_proclist_peek_next(schdlr_sspnd.msb.procs, plp1)) { + plp1 = erts_proclist_peek_next(msbp->blckrs, plp1)) { max_size += 2; } ASSERT(max_size); hp = HAlloc(p, max_size); hp_end = hp + max_size; - for (plp1 = erts_proclist_peek_first(schdlr_sspnd.msb.procs); + for (plp1 = erts_proclist_peek_first(msbp->blckrs); plp1; - plp1 = erts_proclist_peek_next(schdlr_sspnd.msb.procs, plp1)) { - for (plp2 = erts_proclist_peek_first(schdlr_sspnd.msb.procs); + plp1 = erts_proclist_peek_next(msbp->blckrs, plp1)) { + for (plp2 = erts_proclist_peek_first(msbp->blckrs); plp2->pid != plp1->pid; - plp2 = erts_proclist_peek_next(schdlr_sspnd.msb.procs, plp2)); + plp2 = erts_proclist_peek_next(msbp->blckrs, plp2)); if (plp2 == plp1) { res = CONS(hp, plp1->pid, res); hp += 2; @@ -5726,13 +8094,26 @@ sched_thread_func(void *vesdp) ErtsSchedulerData *esdp = vesdp; Uint no = esdp->no; #ifdef ERTS_SMP - ERTS_SCHED_SLEEP_INFO_IX(no - 1)->event = erts_tse_fetch(); + erts_tse_t *tse; +#endif + + erts_sched_init_time_sup(esdp); + + (void) ERTS_RUNQ_FLGS_SET_NOB(esdp->run_queue, + ERTS_RUNQ_FLG_EXEC); + +#ifdef ERTS_SMP + tse = erts_tse_fetch(); + erts_tse_prepare_timed(tse); + ERTS_SCHED_SLEEP_INFO_IX(no - 1)->event = tse; callbacks.arg = (void *) esdp->ssi; callbacks.wakeup = thr_prgr_wakeup; callbacks.prepare_wait = thr_prgr_prep_wait; callbacks.wait = thr_prgr_wait; callbacks.finalize_wait = thr_prgr_fin_wait; + erts_msacc_init_thread("scheduler", no, 1); + erts_thr_progress_register_managed_thread(esdp, &callbacks, 0); erts_alloc_register_scheduler(vesdp); #endif @@ -5762,49 +8143,114 @@ sched_thread_func(void *vesdp) #endif erts_thread_init_float(); - if (no == 1) { - erts_thr_progress_active(esdp, 0); - erts_thr_progress_prepare_wait(esdp); - } +#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC + esdp->verify_unused_temp_alloc + = erts_alloc_get_verify_unused_temp_alloc( + &esdp->verify_unused_temp_alloc_data); + ERTS_VERIFY_UNUSED_TEMP_ALLOC(NULL); +#endif - erts_smp_mtx_lock(&schdlr_sspnd.mtx); + process_main(); + /* No schedulers should *ever* terminate */ + erts_exit(ERTS_ABORT_EXIT, + "Scheduler thread number %beu terminated\n", + no); + return NULL; +} + +#ifdef ERTS_DIRTY_SCHEDULERS +#ifdef ERTS_SMP +static void* +sched_dirty_cpu_thread_func(void *vesdp) +{ + ErtsThrPrgrCallbacks callbacks; + ErtsSchedulerData *esdp = vesdp; + Uint no = ERTS_DIRTY_SCHEDULER_NO(esdp); + ERTS_DIRTY_SCHEDULER_TYPE(esdp) = ERTS_DIRTY_CPU_SCHEDULER; + ASSERT(no != 0); + ERTS_DIRTY_CPU_SCHED_SLEEP_INFO_IX(no-1)->event = erts_tse_fetch(); + callbacks.arg = (void *) esdp->ssi; + callbacks.wakeup = thr_prgr_wakeup; + callbacks.prepare_wait = NULL; + callbacks.wait = NULL; + callbacks.finalize_wait = NULL; - ASSERT(erts_smp_atomic32_read_nob(&schdlr_sspnd.changing) - & ERTS_SCHDLR_SSPND_CHNG_ONLN); + esdp->thr_id += erts_no_schedulers; - if (--schdlr_sspnd.curr_online == schdlr_sspnd.wait_curr_online) { - erts_smp_atomic32_read_band_nob(&schdlr_sspnd.changing, - ~ERTS_SCHDLR_SSPND_CHNG_ONLN); - if (no != 1) - erts_smp_cnd_signal(&schdlr_sspnd.cnd); + erts_thr_progress_register_unmanaged_thread(&callbacks); +#ifdef ERTS_ENABLE_LOCK_CHECK + { + char buf[31]; + erts_snprintf(&buf[0], 31, "dirty cpu scheduler %beu", no); + erts_lc_set_thread_name(&buf[0]); } +#endif + erts_tsd_set(sched_data_key, vesdp); +#if ERTS_USE_ASYNC_READY_Q + esdp->aux_work_data.async_ready.queue = NULL; +#endif - if (no == 1) { - while (schdlr_sspnd.curr_online != schdlr_sspnd.wait_curr_online) - erts_smp_cnd_wait(&schdlr_sspnd.cnd, &schdlr_sspnd.mtx); - ERTS_SCHDLR_SSPND_CHNG_SET(0, ERTS_SCHDLR_SSPND_CHNG_WAITER); - } - erts_smp_mtx_unlock(&schdlr_sspnd.mtx); + erts_proc_lock_prepare_proc_lock_waiter(); + +#ifdef HIPE + hipe_thread_signal_init(); +#endif + erts_thread_init_float(); - if (no == 1) { - erts_thr_progress_finalize_wait(esdp); - erts_thr_progress_active(esdp, 1); + erts_dirty_process_main(esdp); + /* No schedulers should *ever* terminate */ + erts_exit(ERTS_ABORT_EXIT, + "Dirty CPU scheduler thread number %beu terminated\n", + no); + return NULL; +} + +static void* +sched_dirty_io_thread_func(void *vesdp) +{ + ErtsThrPrgrCallbacks callbacks; + ErtsSchedulerData *esdp = vesdp; + Uint no = ERTS_DIRTY_SCHEDULER_NO(esdp); + ERTS_DIRTY_SCHEDULER_TYPE(esdp) = ERTS_DIRTY_IO_SCHEDULER; + ASSERT(no != 0); + ERTS_DIRTY_IO_SCHED_SLEEP_INFO_IX(no-1)->event = erts_tse_fetch(); + callbacks.arg = (void *) esdp->ssi; + callbacks.wakeup = thr_prgr_wakeup; + callbacks.prepare_wait = NULL; + callbacks.wait = NULL; + callbacks.finalize_wait = NULL; + + esdp->thr_id += erts_no_schedulers + erts_no_dirty_cpu_schedulers; + + erts_thr_progress_register_unmanaged_thread(&callbacks); +#ifdef ERTS_ENABLE_LOCK_CHECK + { + char buf[31]; + erts_snprintf(&buf[0], 31, "dirty io scheduler %beu", no); + erts_lc_set_thread_name(&buf[0]); } +#endif + erts_tsd_set(sched_data_key, vesdp); +#if ERTS_USE_ASYNC_READY_Q + esdp->aux_work_data.async_ready.queue = NULL; +#endif -#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC - esdp->verify_unused_temp_alloc - = erts_alloc_get_verify_unused_temp_alloc( - &esdp->verify_unused_temp_alloc_data); - ERTS_VERIFY_UNUSED_TEMP_ALLOC(NULL); + erts_proc_lock_prepare_proc_lock_waiter(); + +#ifdef HIPE + hipe_thread_signal_init(); #endif + erts_thread_init_float(); - process_main(); + erts_dirty_process_main(esdp); /* No schedulers should *ever* terminate */ - erl_exit(ERTS_ABORT_EXIT, - "Scheduler thread number %beu terminated\n", + erts_exit(ERTS_ABORT_EXIT, + "Dirty I/O scheduler thread number %beu terminated\n", no); return NULL; } +#endif +#endif static ethr_tid aux_tid; @@ -5812,24 +8258,28 @@ void erts_start_schedulers(void) { int res = 0; - Uint actual = 0; + Uint actual; Uint wanted = erts_no_schedulers; Uint wanted_no_schedulers = erts_no_schedulers; + char name[16]; ethr_thr_opts opts = ETHR_THR_OPTS_DEFAULT_INITER; opts.detached = 1; + opts.name = name; + #ifdef ERTS_SMP if (erts_runq_supervision_interval) { opts.suggested_stack_size = 16; + erts_snprintf(opts.name, 16, "runq_supervisor"); erts_atomic_init_nob(&runq_supervisor_sleeping, 0); if (0 != ethr_event_init(&runq_supervision_event)) - erl_exit(1, "Failed to create run-queue supervision event\n"); + erts_exit(ERTS_ERROR_EXIT, "Failed to create run-queue supervision event\n"); if (0 != ethr_thr_create(&runq_supervisor_tid, runq_supervisor, NULL, &opts)) - erl_exit(1, "Failed to create run-queue supervision thread\n"); + erts_exit(ERTS_ERROR_EXIT, "Failed to create run-queue supervision thread\n"); } #endif @@ -5843,27 +8293,53 @@ erts_start_schedulers(void) res = ENOTSUP; } - while (actual < wanted) { + for (actual = 0; actual < wanted; actual++) { ErtsSchedulerData *esdp = ERTS_SCHEDULER_IX(actual); - actual++; - ASSERT(actual == esdp->no); - res = ethr_thr_create(&esdp->tid,sched_thread_func,(void*)esdp,&opts); + + ASSERT(actual == esdp->no - 1); + + erts_snprintf(opts.name, 16, "%lu_scheduler", actual + 1); + + res = ethr_thr_create(&esdp->tid, sched_thread_func, (void*)esdp, &opts); + if (res != 0) { - actual--; - break; + break; } } - erts_no_schedulers = actual; +#ifdef ERTS_DIRTY_SCHEDULERS +#ifdef ERTS_SMP + { + int ix; + for (ix = 0; ix < erts_no_dirty_cpu_schedulers; ix++) { + ErtsSchedulerData *esdp = ERTS_DIRTY_CPU_SCHEDULER_IX(ix); + erts_snprintf(opts.name, 16, "%d_dirty_cpu_scheduler", ix + 1); + res = ethr_thr_create(&esdp->tid,sched_dirty_cpu_thread_func,(void*)esdp,&opts); + if (res != 0) + erts_exit(ERTS_ERROR_EXIT, "Failed to create dirty cpu scheduler thread %d\n", ix); + } + for (ix = 0; ix < erts_no_dirty_io_schedulers; ix++) { + ErtsSchedulerData *esdp = ERTS_DIRTY_IO_SCHEDULER_IX(ix); + erts_snprintf(opts.name, 16, "%d_dirty_io_scheduler", ix + 1); + res = ethr_thr_create(&esdp->tid,sched_dirty_io_thread_func,(void*)esdp,&opts); + if (res != 0) + erts_exit(ERTS_ERROR_EXIT, "Failed to create dirty io scheduler thread %d\n", ix); + } + } +#endif +#endif + ERTS_THR_MEMORY_BARRIER; + erts_snprintf(opts.name, 16, "aux"); + res = ethr_thr_create(&aux_tid, aux_thread, NULL, &opts); if (res != 0) - erl_exit(1, "Failed to create aux thread\n"); + erts_exit(ERTS_ERROR_EXIT, "Failed to create aux thread\n"); if (actual < 1) - erl_exit(1, + erts_exit(ERTS_ERROR_EXIT, "Failed to create any scheduler-threads: %s (%d)\n", erl_errno_id(res), res); @@ -5895,7 +8371,7 @@ add_pend_suspend(Process *suspendee, sizeof(ErtsPendingSuspend)); psp->next = NULL; #ifdef DEBUG -#if defined(ARCH_64) && !HALFWORD_HEAP +#if defined(ARCH_64) psp->end = (ErtsPendingSuspend *) 0xdeaddeaddeaddead; #else psp->end = (ErtsPendingSuspend *) 0xdeaddead; @@ -5978,7 +8454,8 @@ handle_pend_sync_suspend(Process *suspendee, } /* suspender is suspended waiting for suspendee to suspend; resume suspender */ - resume_process(suspender); + ASSERT(suspendee != suspender); + resume_process(suspender, ERTS_PROC_LOCK_STATUS); erts_smp_proc_unlock(suspender, ERTS_PROC_LOCK_STATUS); } } @@ -6013,12 +8490,11 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks, ASSERT(c_p->flags & F_P2PNR_RESCHED); c_p->flags &= ~F_P2PNR_RESCHED; if (!suspend && rp) - resume_process(rp); + resume_process(rp, rp_locks); } else { - rp = erts_pid2proc(c_p, c_p_locks|ERTS_PROC_LOCK_STATUS, - pid, pid_locks|ERTS_PROC_LOCK_STATUS); + pid, ERTS_PROC_LOCK_STATUS); if (!rp) { c_p->flags &= ~F_P2PNR_RESCHED; @@ -6027,39 +8503,98 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks, ASSERT(!(c_p->flags & F_P2PNR_RESCHED)); - if (suspend) { - if (suspend_process(c_p, rp)) - goto done; - } - else { - if (!(ERTS_PSFLG_RUNNING & erts_smp_atomic32_read_acqb(&rp->state))) + /* + * Suspend the other process in order to prevent + * it from being selected for normal execution. + * This will however not prevent it from being + * selected for execution of a system task. If + * it is selected for execution of a system task + * we might be blocked for quite a while if the + * try-lock below fails. That is, there is room + * for improvement here... + */ + + if (!suspend_process(c_p, rp)) { + /* Other process running */ + + ASSERT((ERTS_PSFLG_RUNNING | ERTS_PSFLG_DIRTY_RUNNING) + & erts_smp_atomic32_read_nob(&rp->state)); + +#ifdef ERTS_DIRTY_SCHEDULERS + if (!suspend + && (erts_smp_atomic32_read_nob(&rp->state) + & ERTS_PSFLG_DIRTY_RUNNING)) { + ErtsProcLocks need_locks = pid_locks & ~ERTS_PROC_LOCK_STATUS; + if (need_locks && erts_smp_proc_trylock(rp, need_locks) == EBUSY) { + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); + rp = erts_pid2proc(c_p, c_p_locks|ERTS_PROC_LOCK_STATUS, + pid, pid_locks|ERTS_PROC_LOCK_STATUS); + } goto done; + } +#endif - } + running: - /* Other process running */ + /* + * If we got pending suspenders and suspend ourselves waiting + * to suspend another process we might deadlock. + * In this case we have to yield, be suspended by + * someone else and then do it all over again. + */ + if (!c_p->pending_suspenders) { + /* Mark rp pending for suspend by c_p */ + add_pend_suspend(rp, c_p->common.id, handle_pend_sync_suspend); + ASSERT(is_nil(c_p->suspendee)); + + /* Suspend c_p; when rp is suspended c_p will be resumed. */ + suspend_process(c_p, c_p); + c_p->flags |= F_P2PNR_RESCHED; + } + /* Yield (caller is assumed to yield immediately in bif). */ + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); + rp = ERTS_PROC_LOCK_BUSY; + } + else { + ErtsProcLocks need_locks = pid_locks & ~ERTS_PROC_LOCK_STATUS; + if (need_locks && erts_smp_proc_trylock(rp, need_locks) == EBUSY) { + if ((ERTS_PSFLG_RUNNING_SYS|ERTS_PSFLG_DIRTY_RUNNING_SYS) + & erts_smp_atomic32_read_nob(&rp->state)) { + /* Executing system task... */ + resume_process(rp, ERTS_PROC_LOCK_STATUS); + goto running; + } + erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); + /* + * If we are unlucky, the process just got selected for + * execution of a system task. In this case we may be + * blocked here for quite a while... Execution of system + * tasks are fortunately quite rare events. We try to + * avoid this by checking if it is in a state executing + * system tasks (above), but it will not prevent all + * scenarios for a long block here... + */ + rp = erts_pid2proc(c_p, c_p_locks|ERTS_PROC_LOCK_STATUS, + pid, pid_locks|ERTS_PROC_LOCK_STATUS); + if (!rp) + goto done; + } - /* - * If we got pending suspenders and suspend ourselves waiting - * to suspend another process we might deadlock. - * In this case we have to yield, be suspended by - * someone else and then do it all over again. - */ - if (!c_p->pending_suspenders) { - /* Mark rp pending for suspend by c_p */ - add_pend_suspend(rp, c_p->common.id, handle_pend_sync_suspend); - ASSERT(is_nil(c_p->suspendee)); + /* + * The previous suspend has prevented the process + * from being selected for normal execution regardless + * of locks held or not held on it... + */ + ASSERT(!((ERTS_PSFLG_RUNNING|ERTS_PSFLG_DIRTY_RUNNING_SYS) + & erts_smp_atomic32_read_nob(&rp->state))); - /* Suspend c_p; when rp is suspended c_p will be resumed. */ - suspend_process(c_p, c_p); - c_p->flags |= F_P2PNR_RESCHED; + if (!suspend) + resume_process(rp, pid_locks|ERTS_PROC_LOCK_STATUS); } - /* Yield (caller is assumed to yield immediately in bif). */ - erts_smp_proc_unlock(rp, pid_locks|ERTS_PROC_LOCK_STATUS); - rp = ERTS_PROC_LOCK_BUSY; } done: + if (rp && rp != ERTS_PROC_LOCK_BUSY && !(pid_locks & ERTS_PROC_LOCK_STATUS)) erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS); if (unlock_c_p_status) @@ -6170,7 +8705,8 @@ handle_pend_bif_sync_suspend(Process *suspendee, } /* suspender is suspended waiting for suspendee to suspend; resume suspender */ - resume_process(suspender); + ASSERT(suspender != suspendee); + resume_process(suspender, ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS); erts_smp_proc_unlock(suspender, ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS); } @@ -6530,7 +9066,8 @@ resume_process_1(BIF_ALIST_1) ASSERT(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&suspendee->state)); - resume_process(suspendee); + ASSERT(BIF_P != suspendee); + resume_process(suspendee, ERTS_PROC_LOCK_STATUS); erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS); } @@ -6552,50 +9089,80 @@ resume_process_1(BIF_ALIST_1) } Uint -erts_run_queues_len(Uint *qlen) +erts_run_queues_len(Uint *qlen, int atomic_queues_read, int incl_active_sched) { int i = 0; Uint len = 0; - ERTS_ATOMIC_FOREACH_RUNQ(rq, - { - Sint pqlen = 0; - int pix; - for (pix = 0; pix < ERTS_NO_PROC_PRIO_LEVELS; pix++) - pqlen += RUNQ_READ_LEN(&rq->procs.prio_info[pix].len); + if (atomic_queues_read) + ERTS_ATOMIC_FOREACH_RUNQ(rq, + { + Sint rq_len = (Sint) erts_smp_atomic32_read_dirty(&rq->len); + ASSERT(rq_len >= 0); + if (incl_active_sched + && (ERTS_RUNQ_FLGS_GET_NOB(rq) & ERTS_RUNQ_FLG_EXEC)) { + rq_len++; + } + if (qlen) + qlen[i++] = rq_len; + len += (Uint) rq_len; + } + ); + else { + for (i = 0; i < erts_no_run_queues; i++) { + ErtsRunQueue *rq = ERTS_RUNQ_IX(i); + Sint rq_len = (Sint) erts_smp_atomic32_read_nob(&rq->len); + ASSERT(rq_len >= 0); + if (incl_active_sched + && (ERTS_RUNQ_FLGS_GET_NOB(rq) & ERTS_RUNQ_FLG_EXEC)) { + rq_len++; + } + if (qlen) + qlen[i] = rq_len; + len += (Uint) rq_len; + } - if (pqlen < 0) - pqlen = 0; - if (qlen) - qlen[i++] = pqlen; - len += pqlen; } - ); return len; } Eterm -erts_process_status(Process *c_p, ErtsProcLocks c_p_locks, - Process *rp, Eterm rpid) +erts_process_state2status(erts_aint32_t state) +{ + if (state & ERTS_PSFLG_FREE) + return am_free; + + if (state & ERTS_PSFLG_EXITING) + return am_exiting; + + if (state & ERTS_PSFLG_GC) + return am_garbage_collecting; + + if (state & ERTS_PSFLG_SUSPENDED) + return am_suspended; + + if (state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS)) + return am_running; + + if (state & (ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + return am_runnable; + + return am_waiting; +} + +Eterm +erts_process_status(Process *rp, Eterm rpid) { Eterm res = am_undefined; Process *p = rp ? rp : erts_proc_lookup_raw(rpid); if (p) { erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); - if (state & ERTS_PSFLG_FREE) - res = am_free; - else if (state & ERTS_PSFLG_EXITING) - res = am_exiting; - else if (state & ERTS_PSFLG_GC) - res = am_garbage_collecting; - else if (state & ERTS_PSFLG_SUSPENDED) - res = am_suspended; - else if (state & ERTS_PSFLG_RUNNING) - res = am_running; - else if (state & ERTS_PSFLG_ACTIVE) - res = am_runnable; - else - res = am_waiting; + res = erts_process_state2status(state); } #ifdef ERTS_SMP else { @@ -6660,7 +9227,7 @@ erts_resume(Process* process, ErtsProcLocks process_locks) ERTS_SMP_LC_ASSERT(process_locks == erts_proc_lc_my_proc_locks(process)); if (!(process_locks & ERTS_PROC_LOCK_STATUS)) erts_smp_proc_lock(process, ERTS_PROC_LOCK_STATUS); - resume_process(process); + resume_process(process, process_locks|ERTS_PROC_LOCK_STATUS); if (!(process_locks & ERTS_PROC_LOCK_STATUS)) erts_smp_proc_unlock(process, ERTS_PROC_LOCK_STATUS); } @@ -6679,7 +9246,7 @@ erts_resume_processes(ErtsProcList *list) proc = erts_pid2proc(NULL, 0, plp->pid, ERTS_PROC_LOCK_STATUS); if (proc) { if (erts_proclist_same(plp, proc)) { - resume_process(proc); + resume_process(proc, ERTS_PROC_LOCK_STATUS); nresumed++; } erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_STATUS); @@ -6695,7 +9262,7 @@ Eterm erts_get_process_priority(Process *p) { erts_aint32_t state = erts_smp_atomic32_read_nob(&p->state); - switch (state & ERTS_PSFLG_PRIO_MASK) { + switch (ERTS_PSFLGS_GET_USR_PRIO(state)) { case PRIORITY_MAX: return am_max; case PRIORITY_HIGH: return am_high; case PRIORITY_NORMAL: return am_normal; @@ -6718,20 +9285,74 @@ erts_set_process_priority(Process *p, Eterm value) } a = erts_smp_atomic32_read_nob(&p->state); - if (nprio == (a & ERTS_PSFLG_PRIO_MASK)) + if (nprio == ERTS_PSFLGS_GET_USR_PRIO(a)) oprio = nprio; else { - erts_aint32_t e, n; + int slocked = 0; + erts_aint32_t e, n, aprio; + + if (a & ERTS_PSFLG_ACTIVE_SYS) { + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + slocked = 1; + } + do { - oprio = a & ERTS_PSFLG_PRIO_MASK; + oprio = ERTS_PSFLGS_GET_USR_PRIO(a); n = e = a; - ASSERT(!(a & ERTS_PSFLG_IN_RUNQ)); + if (!(a & (ERTS_PSFLG_ACTIVE_SYS|ERTS_PSFLG_DELAYED_SYS))) + aprio = nprio; + else { + int max_qbit; + + if (!slocked) { + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + slocked = 1; + } + + max_qbit = 0; + if (a & ERTS_PSFLG_ACTIVE_SYS) + max_qbit |= p->sys_task_qs->qmask; + if (a & ERTS_PSFLG_DELAYED_SYS) { + ErtsProcSysTaskQs *qs; + qs = ERTS_PROC_GET_DELAYED_GC_TASK_QS(p); + ASSERT(qs); + max_qbit |= qs->qmask; + } + max_qbit &= -max_qbit; + switch (max_qbit) { + case MAX_BIT: + aprio = PRIORITY_MAX; + break; + case HIGH_BIT: + aprio = PRIORITY_HIGH; + break; + case NORMAL_BIT: + aprio = PRIORITY_NORMAL; + break; + case LOW_BIT: + aprio = PRIORITY_LOW; + break; + default: + ERTS_INTERNAL_ERROR("Invalid qmask"); + aprio = -1; + } + + if (aprio > nprio) /* low value -> high prio */ + aprio = nprio; + } + + n &= ~(ERTS_PSFLGS_USR_PRIO_MASK + | ERTS_PSFLGS_ACT_PRIO_MASK); + n |= ((nprio << ERTS_PSFLGS_USR_PRIO_OFFSET) + | (aprio << ERTS_PSFLGS_ACT_PRIO_OFFSET)); - n &= ~ERTS_PSFLG_PRIO_MASK; - n |= nprio; a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); } while (a != e); + + if (slocked) + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + } switch (oprio) { @@ -6743,6 +9364,19 @@ erts_set_process_priority(Process *p, Eterm value) } } +static int +scheduler_gc_proc(Process *c_p, int reds_left) +{ + int fcalls, reds; + if (!ERTS_PROC_GET_SAVED_CALLS_BUF(c_p)) + fcalls = reds_left; + else + fcalls = reds_left - CONTEXT_REDS; + reds = erts_garbage_collect_nobump(c_p, 0, c_p->arg_reg, c_p->arity, fcalls); + ASSERT(reds_left >= reds); + return reds; +} + /* * schedule() is called from BEAM (process_main()) or HiPE * (hipe_mode_switch()) when the current process is to be @@ -6761,11 +9395,10 @@ erts_set_process_priority(Process *p, Eterm value) * so that normal processes get to run more frequently. */ -Process *schedule(Process *p, int calls) +Process *erts_schedule(ErtsSchedulerData *esdp, Process *p, int calls) { + Process *proxy_p = NULL; ErtsRunQueue *rq; - erts_aint_t dt; - ErtsSchedulerData *esdp; int context_reds; int fcalls; int input_reductions; @@ -6773,6 +9406,9 @@ Process *schedule(Process *p, int calls) int reds; Uint32 flags; erts_aint32_t state = 0; /* Supress warning... */ + int is_normal_sched; + + ERTS_MSACC_DECLARE_CACHE(); #ifdef USE_VM_PROBES if (p != NULL && DTRACE_ENABLED(process_unscheduled)) { @@ -6792,13 +9428,26 @@ Process *schedule(Process *p, int calls) input_reductions = INPUT_REDUCTIONS; } - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); + ERTS_SMP_LC_ASSERT(ERTS_SCHEDULER_IS_DIRTY(erts_get_scheduler_data()) + || !erts_thr_progress_is_blocking()); /* * Clean up after the process being scheduled out. */ if (!p) { /* NULL in the very first schedule() call */ +#ifdef ERTS_DIRTY_SCHEDULERS + is_normal_sched = !esdp; + if (is_normal_sched) { + esdp = erts_get_scheduler_data(); + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); + } + else { + ASSERT(ERTS_SCHEDULER_IS_DIRTY(esdp)); + } +#else esdp = erts_get_scheduler_data(); + is_normal_sched = 1; +#endif rq = erts_get_runq_current(esdp); ASSERT(esdp); fcalls = (int) erts_smp_atomic32_read_acqb(&function_calls); @@ -6806,15 +9455,34 @@ Process *schedule(Process *p, int calls) erts_smp_runq_lock(rq); } else { #ifdef ERTS_SMP - ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); +#ifdef ERTS_DIRTY_SCHEDULERS + is_normal_sched = !esdp; + if (is_normal_sched) { + esdp = p->scheduler_data; + ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp)); + } + else { + ASSERT(ERTS_SCHEDULER_IS_DIRTY(esdp)); + } +#else esdp = p->scheduler_data; + is_normal_sched = 1; +#endif ASSERT(esdp->current_process == p || esdp->free_process == p); #else esdp = erts_scheduler_data; ASSERT(esdp->current_process == p); + is_normal_sched = 1; #endif + + sched_out_proc: + + ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); + reds = actual_reds = calls - esdp->virtual_reds; + + ASSERT(actual_reds >= 0); if (reds < ERTS_PROC_MIN_CONTEXT_SWITCH_REDS_COST) reds = ERTS_PROC_MIN_CONTEXT_SWITCH_REDS_COST; esdp->virtual_reds = 0; @@ -6826,29 +9494,41 @@ Process *schedule(Process *p, int calls) p->reds += actual_reds; - erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); +#ifdef ERTS_SMP + erts_smp_proc_lock(p, ERTS_PROC_LOCK_TRACE); + if (p->trace_msg_q) { + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_TRACE); + erts_schedule_flush_trace_messages(p->common.id); + } else + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_TRACE); +#endif - state = erts_smp_atomic32_read_acqb(&p->state); + state = erts_smp_atomic32_read_nob(&p->state); if (IS_TRACED(p)) { if (IS_TRACED_FL(p, F_TRACE_CALLS) && !(state & ERTS_PSFLG_FREE)) erts_schedule_time_break(p, ERTS_BP_CALL_TIME_SCHEDULE_OUT); - if (state & (ERTS_PSFLG_FREE|ERTS_PSFLG_EXITING)) { + if ((state & (ERTS_PSFLG_FREE|ERTS_PSFLG_EXITING)) == ERTS_PSFLG_EXITING) { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_EXIT)) - trace_sched(p, ((state & ERTS_PSFLG_FREE) - ? am_out_exited - : am_out_exiting)); + trace_sched(p, ERTS_PROC_LOCK_MAIN, + ((state & ERTS_PSFLG_FREE) + ? am_out_exited + : am_out_exiting)); } else { - if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED)) - trace_sched(p, am_out); - else if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) - trace_virtual_sched(p, am_out); + if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED) || + ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) + trace_sched(p, ERTS_PROC_LOCK_MAIN, am_out); } } + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + + /* have to re-read state after taking lock */ + state = erts_smp_atomic32_read_nob(&p->state); + #ifdef ERTS_SMP - if (state & ERTS_PSFLG_PENDING_EXIT) + if (is_normal_sched && (state & ERTS_PSFLG_PENDING_EXIT)) erts_handle_pending_exit(p, (ERTS_PROC_LOCK_MAIN | ERTS_PROC_LOCK_STATUS)); if (p->pending_suspenders) @@ -6858,10 +9538,12 @@ Process *schedule(Process *p, int calls) esdp->reductions += reds; - schedule_out_process(rq, state, p); /* Returns with rq locked! */ + /* schedule_out_process() returns with rq locked! */ + schedule_out_process(rq, state, p, proxy_p, is_normal_sched); + proxy_p = NULL; - ERTS_PROC_REDUCTIONS_EXECUTED(rq, - (int) (state & ERTS_PSFLG_PRIO_MASK), + ERTS_PROC_REDUCTIONS_EXECUTED(esdp, rq, + (int) ERTS_PSFLGS_GET_USR_PRIO(state), reds, actual_reds); @@ -6870,18 +9552,25 @@ Process *schedule(Process *p, int calls) p->scheduler_data = NULL; #endif + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); + + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_OTHER); if (state & ERTS_PSFLG_FREE) { + if (!is_normal_sched) { + ASSERT(p->flags & F_DELAYED_DEL_PROC); + erts_proc_dec_refc(p); + } + else { #ifdef ERTS_SMP - ASSERT(esdp->free_process == p); - esdp->free_process = NULL; -#else - erts_free_proc(p); + ASSERT(esdp->free_process == p); + esdp->free_process = NULL; +#else + erts_proc_dec_refc(p); #endif + } } - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); - #ifdef ERTS_SMP ASSERT(!esdp->free_process); #endif @@ -6889,69 +9578,74 @@ Process *schedule(Process *p, int calls) ERTS_SMP_CHK_NO_PROC_LOCKS; - dt = erts_do_time_read_and_reset(); - if (dt) { - erts_smp_runq_unlock(rq); - erts_bump_timer(dt); - erts_smp_runq_lock(rq); + if (is_normal_sched) { + if (esdp->check_time_reds >= ERTS_CHECK_TIME_REDS) + (void) erts_get_monotonic_time(esdp); + + if (esdp->last_monotonic_time >= erts_next_timeout_time(esdp->next_tmo_ref)) { + erts_smp_runq_unlock(rq); + erts_bump_timers(esdp->timer_wheel, esdp->last_monotonic_time); + erts_smp_runq_lock(rq); + } } BM_STOP_TIMER(system); } - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); + ERTS_SMP_LC_ASSERT(!is_normal_sched || !erts_thr_progress_is_blocking()); check_activities_to_run: { + erts_aint32_t psflg_running, psflg_running_sys; #ifdef ERTS_SMP ErtsMigrationPaths *mps; ErtsMigrationPath *mp; -#ifdef ERTS_SMP - { - ErtsProcList *pnd_xtrs = rq->procs.pending_exiters; - if (erts_proclist_fetch(&pnd_xtrs, NULL)) { - rq->procs.pending_exiters = NULL; - erts_smp_runq_unlock(rq); - handle_pending_exiters(pnd_xtrs); - erts_smp_runq_lock(rq); - } - - } -#endif - - if (rq->check_balance_reds <= 0) - check_balance(rq); + if (is_normal_sched) { + if (rq->check_balance_reds <= 0) + check_balance(rq); - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); - ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); + ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); - mps = erts_get_migration_paths_managed(); - mp = &mps->mpath[rq->ix]; + mps = erts_get_migration_paths_managed(); + mp = &mps->mpath[rq->ix]; - if (mp->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK) - immigrate(rq, mp); + if (mp->flags & ERTS_RUNQ_FLGS_IMMIGRATE_QMASK) + immigrate(rq, mp); + } + ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); continue_check_activities_to_run: flags = ERTS_RUNQ_FLGS_GET_NOB(rq); continue_check_activities_to_run_known_flags: + ASSERT(!is_normal_sched || (flags & ERTS_RUNQ_FLG_NONEMPTY)); - - if (flags & (ERTS_RUNQ_FLG_CHK_CPU_BIND|ERTS_RUNQ_FLG_SUSPENDED)) { - - if (flags & ERTS_RUNQ_FLG_SUSPENDED) { + if (!is_normal_sched) { + if (erts_smp_atomic32_read_acqb(&esdp->ssi->flags) + & ERTS_SSI_FLG_SUSPENDED) { suspend_scheduler(esdp); - flags = ERTS_RUNQ_FLGS_GET_NOB(rq); - } - if (flags & ERTS_RUNQ_FLG_CHK_CPU_BIND) { - flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_CHK_CPU_BIND); - flags &= ~ ERTS_RUNQ_FLG_CHK_CPU_BIND; - erts_sched_check_cpu_bind(esdp); } } - - { + else { erts_aint32_t aux_work; - int leader_update = erts_thr_progress_update(esdp); + int leader_update; + + ASSERT(is_normal_sched); + + if (flags & (ERTS_RUNQ_FLG_CHK_CPU_BIND|ERTS_RUNQ_FLG_SUSPENDED)) { + if (flags & ERTS_RUNQ_FLG_SUSPENDED) { + (void) ERTS_RUNQ_FLGS_UNSET_NOB(rq, ERTS_RUNQ_FLG_EXEC); + suspend_scheduler(esdp); + flags = ERTS_RUNQ_FLGS_SET_NOB(rq, ERTS_RUNQ_FLG_EXEC); + flags |= ERTS_RUNQ_FLG_EXEC; + } + if (flags & ERTS_RUNQ_FLG_CHK_CPU_BIND) { + flags = ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_CHK_CPU_BIND); + flags &= ~ERTS_RUNQ_FLG_CHK_CPU_BIND; + erts_sched_check_cpu_bind(esdp); + } + } + + leader_update = erts_thr_progress_update(esdp); aux_work = erts_atomic32_read_acqb(&esdp->ssi->aux_work); if (aux_work | leader_update) { erts_smp_runq_unlock(rq); @@ -6961,9 +9655,9 @@ Process *schedule(Process *p, int calls) handle_aux_work(&esdp->aux_work_data, aux_work, 0); erts_smp_runq_lock(rq); } - } - ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); + ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking()); + } ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); #else /* ERTS_SMP */ @@ -6977,8 +9671,13 @@ Process *schedule(Process *p, int calls) flags = ERTS_RUNQ_FLGS_GET_NOB(rq); - if ((!(flags & ERTS_RUNQ_FLGS_QMASK) && !rq->misc.start) - || (rq->halt_in_progress && ERTS_EMPTY_RUNQ_PORTS(rq))) { + if (!is_normal_sched && rq->halt_in_progress) { + /* Wait for emulator to terminate... */ + while (1) + erts_milli_sleep(1000*1000); + } + else if ((!(flags & ERTS_RUNQ_FLGS_QMASK) && !rq->misc.start) + || (rq->halt_in_progress && ERTS_EMPTY_RUNQ_PORTS(rq))) { /* Prepare for scheduler wait */ #ifdef ERTS_SMP ERTS_SMP_LC_ASSERT(erts_smp_lc_runq_is_locked(rq)); @@ -6986,20 +9685,16 @@ Process *schedule(Process *p, int calls) rq->wakeup_other = 0; rq->wakeup_other_reds = 0; - empty_runq(rq); - flags = ERTS_RUNQ_FLGS_GET_NOB(rq); - if (flags & ERTS_RUNQ_FLG_SUSPENDED) { - non_empty_runq(rq); + if (flags & ERTS_RUNQ_FLG_SUSPENDED) goto continue_check_activities_to_run_known_flags; - } - else if (!(flags & ERTS_RUNQ_FLG_INACTIVE)) { - if (try_steal_task(rq)) { - non_empty_runq(rq); + if (flags & ERTS_RUNQ_FLG_INACTIVE) + empty_runq(rq); + else { + if (is_normal_sched && try_steal_task(rq)) goto continue_check_activities_to_run; - } - (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); + empty_runq(rq); /* * Check for ERTS_RUNQ_FLG_SUSPENDED has to be done @@ -7008,37 +9703,50 @@ Process *schedule(Process *p, int calls) flags = ERTS_RUNQ_FLGS_GET_NOB(rq); if (flags & ERTS_RUNQ_FLG_SUSPENDED) { non_empty_runq(rq); + flags |= ERTS_RUNQ_FLG_NONEMPTY; goto continue_check_activities_to_run_known_flags; } } - #endif + (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_EXEC); scheduler_wait(&fcalls, esdp, rq); - + flags = ERTS_RUNQ_FLGS_SET_NOB(rq, ERTS_RUNQ_FLG_EXEC); + flags |= ERTS_RUNQ_FLG_EXEC; + ERTS_MSACC_UPDATE_CACHE(); #ifdef ERTS_SMP non_empty_runq(rq); #endif goto check_activities_to_run; } - else if (fcalls > input_reductions && prepare_for_sys_schedule()) { + else if (is_normal_sched + && (fcalls > input_reductions + && prepare_for_sys_schedule(!0))) { + ErtsMonotonicTime current_time; /* * Schedule system-level activities. */ + ERTS_MSACC_PUSH_STATE_CACHED_M(); + erts_smp_atomic32_set_relb(&function_calls, 0); fcalls = 0; - ASSERT(!erts_port_task_have_outstanding_io_tasks()); - #if 0 /* Not needed since we wont wait in sys schedule */ erts_sys_schedule_interrupt(0); #endif erts_smp_runq_unlock(rq); + + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_CHECK_IO); + LTTNG2(scheduler_poll, esdp->no, 1); + erl_sys_schedule(1); - dt = erts_do_time_read_and_reset(); - if (dt) erts_bump_timer(dt); + ERTS_MSACC_POP_STATE_M(); + + current_time = erts_get_monotonic_time(esdp); + if (current_time >= erts_next_timeout_time(esdp->next_tmo_ref)) + erts_bump_timers(esdp->timer_wheel, current_time); #ifdef ERTS_SMP erts_smp_runq_lock(rq); @@ -7063,7 +9771,9 @@ Process *schedule(Process *p, int calls) if (RUNQ_READ_LEN(&rq->ports.info.len)) { int have_outstanding_io; have_outstanding_io = erts_port_task_execute(rq, &esdp->current_port); - if ((have_outstanding_io && fcalls > 2*input_reductions) + if ((!erts_eager_check_io + && have_outstanding_io + && fcalls > 2*input_reductions) || rq->halt_in_progress) { /* * If we have performed more than 2*INPUT_REDUCTIONS since @@ -7088,12 +9798,14 @@ Process *schedule(Process *p, int calls) * Find a new process to run. */ pick_next_process: { + erts_aint32_t psflg_band_mask; int prio_q; - int qmask; + int qmask, qbit; flags = ERTS_RUNQ_FLGS_GET_NOB(rq); qmask = (int) (flags & ERTS_RUNQ_FLGS_PROCS_QMASK); - switch (qmask & -qmask) { + qbit = qmask & -qmask; + switch (qbit) { case MAX_BIT: prio_q = PRIORITY_MAX; break; @@ -7109,9 +9821,12 @@ Process *schedule(Process *p, int calls) case 0: /* No process at all */ default: ASSERT(qmask == 0); + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_OTHER); goto check_activities_to_run; } + ERTS_MSACC_SET_STATE_CACHED_M(ERTS_MSACC_STATE_EMULATOR); + BM_START_TIMER(system); /* @@ -7121,18 +9836,88 @@ Process *schedule(Process *p, int calls) ASSERT(p); /* Wrong qmask in rq->flags? */ + if (is_normal_sched) { + psflg_running = ERTS_PSFLG_RUNNING; + psflg_running_sys = ERTS_PSFLG_RUNNING_SYS; + psflg_band_mask = ~(((erts_aint32_t) 1) << (ERTS_PSFLGS_GET_PRQ_PRIO(state) + + ERTS_PSFLGS_IN_PRQ_MASK_OFFSET)); + } + else { + psflg_running = ERTS_PSFLG_DIRTY_RUNNING; + psflg_running_sys = ERTS_PSFLG_DIRTY_RUNNING_SYS; + psflg_band_mask = ~((erts_aint32_t) 0); + } + + if (!(state & ERTS_PSFLG_PROXY)) + psflg_band_mask &= ~ERTS_PSFLG_IN_RUNQ; + else { + proxy_p = p; + p = erts_proc_lookup_raw(proxy_p->common.id); + if (!p) { + free_proxy_proc(proxy_p); + proxy_p = NULL; + goto pick_next_process; + } + state = erts_smp_atomic32_read_nob(&p->state); + } + +#ifdef ERTS_DIRTY_SCHEDULERS + if (!is_normal_sched) + clear_proc_dirty_queue_bit(p, rq, qbit); +#endif + while (1) { - erts_aint32_t exp, new, tmp; - tmp = new = exp = state; - new &= ~ERTS_PSFLG_IN_RUNQ; - tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); - if (tmp != ERTS_PSFLG_SUSPENDED) - new |= ERTS_PSFLG_RUNNING; + erts_aint32_t exp, new; + int run_process; + new = exp = state; + new &= psflg_band_mask; + /* + * Run process if not already running (or free) + * or exiting and not running on a normal + * scheduler, and not suspended (and not in a + * state where suspend should be ignored). + */ + run_process = (((!(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS + | ERTS_PSFLG_FREE))) +#ifdef ERTS_DIRTY_SCHEDULERS + | (((state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_FREE + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_EXITING)) + == ERTS_PSFLG_EXITING) + & (!!is_normal_sched)) +#endif + ) + & ((state & (ERTS_PSFLG_SUSPENDED + | ERTS_PSFLG_EXITING + | ERTS_PSFLG_FREE + | ERTS_PSFLG_PENDING_EXIT + | ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + != ERTS_PSFLG_SUSPENDED)); + if (run_process) { + if (state & (ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + new |= psflg_running_sys; + else + new |= psflg_running; + } state = erts_smp_atomic32_cmpxchg_relb(&p->state, new, exp); if (state == exp) { - tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); - if (tmp == ERTS_PSFLG_SUSPENDED) + if (!run_process) { + if (proxy_p) { + free_proxy_proc(proxy_p); + proxy_p = NULL; + } + else if (state & ERTS_PSFLG_FREE) { + /* free and not queued by proxy */ + erts_proc_dec_refc(p); + } goto pick_next_process; + } state = new; break; } @@ -7142,10 +9927,14 @@ Process *schedule(Process *p, int calls) esdp->current_process = p; + calls = 0; + reds = context_reds; + + erts_smp_runq_unlock(rq); + } #ifdef ERTS_SMP - erts_smp_runq_unlock(rq); if (flags & ERTS_RUNQ_FLG_PROTECTED) (void) ERTS_RUNQ_FLGS_UNSET(rq, ERTS_RUNQ_FLG_PROTECTED); @@ -7154,15 +9943,16 @@ Process *schedule(Process *p, int calls) erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); + state = erts_smp_atomic32_read_nob(&p->state); + if (erts_sched_stat.enabled) { int prio; - UWord old = ERTS_PROC_SCHED_ID(p, - (ERTS_PROC_LOCK_MAIN - | ERTS_PROC_LOCK_STATUS), - (UWord) esdp->no); + UWord old = ERTS_PROC_SCHED_ID(p, (UWord) esdp->no); int migrated = old && old != esdp->no; - prio = (int) (state & ERTS_PSFLG_PRIO_MASK); + ASSERT(is_normal_sched); + + prio = (int) ERTS_PSFLGS_GET_USR_PRIO(state); erts_smp_spin_lock(&erts_sched_stat.lock); erts_sched_stat.prio[prio].total_executed++; @@ -7174,57 +9964,849 @@ Process *schedule(Process *p, int calls) erts_smp_spin_unlock(&erts_sched_stat.lock); } - if (ERTS_PROC_PENDING_EXIT(p)) { + state = erts_smp_atomic32_read_nob(&p->state); + + ASSERT(!p->scheduler_data); +#ifndef ERTS_DIRTY_SCHEDULERS + p->scheduler_data = esdp; +#else /* ERTS_DIRTY_SCHEDULERS */ + if (is_normal_sched) { + if ((!!(state & ERTS_PSFLGS_DIRTY_WORK)) + & (!(state & ERTS_PSFLG_ACTIVE_SYS))) { + /* Migrate to dirty scheduler... */ + sunlock_sched_out_proc: + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + goto sched_out_proc; + } + p->scheduler_data = esdp; + } + else { + if (state & (ERTS_PSFLG_ACTIVE_SYS + | ERTS_PSFLG_PENDING_EXIT + | ERTS_PSFLG_EXITING)) { + /* Migrate to normal scheduler... */ + goto sunlock_sched_out_proc; + } + if ((state & ERTS_PSFLG_DIRTY_ACTIVE_SYS) + && rq == ERTS_DIRTY_IO_RUNQ) { + /* Migrate to dirty cpu scheduler... */ + goto sunlock_sched_out_proc; + } + + ASSERT((state & ERTS_PSFLG_DIRTY_ACTIVE_SYS) + || *p->i == (BeamInstr) em_call_nif); + + ASSERT(rq == ERTS_DIRTY_CPU_RUNQ + ? (state & (ERTS_PSFLG_DIRTY_CPU_PROC + | ERTS_PSFLG_DIRTY_ACTIVE_SYS)) + : (rq == ERTS_DIRTY_IO_RUNQ + && (state & ERTS_PSFLG_DIRTY_IO_PROC))); + } +#endif + + if (state & ERTS_PSFLG_PENDING_EXIT) { erts_handle_pending_exit(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS); state = erts_smp_atomic32_read_nob(&p->state); } - ASSERT(!p->scheduler_data); - p->scheduler_data = esdp; -#endif - /* Never run a suspended process */ - ASSERT(!(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&p->state))); - reds = context_reds; +#endif /* ERTS_SMP */ + + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + + /* Clear tracer if it has been removed */ + if (IS_TRACED(p) && erts_is_tracer_proc_enabled( + p, ERTS_PROC_LOCK_MAIN, &p->common)) { - if (IS_TRACED(p)) { if (state & ERTS_PSFLG_EXITING) { if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_EXIT)) - trace_sched(p, am_in_exiting); + trace_sched(p, ERTS_PROC_LOCK_MAIN, am_in_exiting); } else { - if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED)) - trace_sched(p, am_in); - else if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) - trace_virtual_sched(p, am_in); + if (ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED) || + ARE_TRACE_FLAGS_ON(p, F_TRACE_SCHED_PROCS)) + trace_sched(p, ERTS_PROC_LOCK_MAIN, am_in); } if (IS_TRACED_FL(p, F_TRACE_CALLS)) { erts_schedule_time_break(p, ERTS_BP_CALL_TIME_SCHEDULE_IN); } } - erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); + if (state & (ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING_SYS)) { + /* + * GC is normally never delayed when a process + * is scheduled out, but might be when executing + * hand written beam assembly in + * prim_eval:'receive'. If GC is delayed we are + * not allowed to execute system tasks. + */ + if (!(p->flags & F_DELAY_GC)) { + int cost = execute_sys_tasks(p, &state, reds); + calls += cost; + reds -= cost; + if (reds <= 0 +#ifdef ERTS_DIRTY_SCHEDULERS + || !is_normal_sched + || (state & ERTS_PSFLGS_DIRTY_WORK) +#endif + ) { + goto sched_out_proc; + } + } -#ifdef ERTS_SMP - if (is_not_nil(ERTS_TRACER_PROC(p))) - erts_check_my_tracer_proc(p); -#endif + ASSERT(state & psflg_running_sys); + ASSERT(!(state & psflg_running)); + + while (1) { + erts_aint32_t n, e; + + if (((state & (ERTS_PSFLG_SUSPENDED + | ERTS_PSFLG_ACTIVE)) != ERTS_PSFLG_ACTIVE) + && !(state & ERTS_PSFLG_EXITING)) { + goto sched_out_proc; + } + + n = e = state; + n &= ~psflg_running_sys; + n |= psflg_running; - if (!(state & ERTS_PSFLG_EXITING) - && ((FLAGS(p) & F_FORCE_GC) - || (MSO(p).overhead > BIN_VHEAP_SZ(p)))) { - reds -= erts_garbage_collect(p, 0, p->arg_reg, p->arity); - if (reds < 0) { - reds = 1; + state = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); + if (state == e) { + state = n; + break; + } + + ASSERT(state & psflg_running_sys); + ASSERT(!(state & psflg_running)); } } - + + if (ERTS_IS_GC_DESIRED(p) && !ERTS_SCHEDULER_IS_DIRTY_IO(esdp)) { + if (!(state & ERTS_PSFLG_EXITING) && !(p->flags & (F_DELAY_GC|F_DISABLE_GC))) { + int cost = scheduler_gc_proc(p, reds); + calls += cost; + reds -= cost; + if (reds <= 0) + goto sched_out_proc; + } + } + + if (proxy_p) { + free_proxy_proc(proxy_p); + proxy_p = NULL; + } + p->fcalls = reds; + ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); + + /* Never run a suspended process */ + ASSERT(!(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&p->state))); + + ASSERT(erts_proc_read_refc(p) > 0); + + if (!(state & ERTS_PSFLG_EXITING) && ERTS_PTMR_IS_TIMED_OUT(p)) { + BeamInstr** pi; +#ifdef ERTS_SMP + ETHR_MEMBAR(ETHR_LoadLoad|ETHR_LoadStore); +#endif + pi = (BeamInstr **) p->def_arg_reg; + p->i = *pi; + p->flags &= ~F_INSLPQUEUE; + p->flags |= F_TIMO; + ERTS_PTMR_CLEAR(p); + } + return p; } } +static int +notify_sys_task_executed(Process *c_p, ErtsProcSysTask *st, Eterm st_result) +{ + Process *rp = erts_proc_lookup(st->requester); + if (rp) { + ErtsProcLocks rp_locks; + ErlOffHeap *ohp; + ErtsMessage *mp; + Eterm *hp, msg, req_id, result; + Uint st_result_sz, hsz; +#ifdef DEBUG + Eterm *hp_start; +#endif + + rp_locks = (c_p == rp) ? ERTS_PROC_LOCK_MAIN : 0; + + st_result_sz = is_immed(st_result) ? 0 : size_object(st_result); + hsz = st->req_id_sz + st_result_sz + 4 /* 3-tuple */; + + mp = erts_alloc_message_heap(rp, &rp_locks, hsz, &hp, &ohp); + +#ifdef DEBUG + hp_start = hp; +#endif + + req_id = st->req_id_sz == 0 ? st->req_id : copy_struct(st->req_id, + st->req_id_sz, + &hp, + ohp); + + result = st_result_sz == 0 ? st_result : copy_struct(st_result, + st_result_sz, + &hp, + ohp); + + ASSERT(is_immed(st->reply_tag)); + + msg = TUPLE3(hp, st->reply_tag, req_id, result); + +#ifdef DEBUG + hp += 4; + ASSERT(hp_start + hsz == hp); +#endif + + erts_queue_message(rp, rp_locks, mp, msg, c_p->common.id); + + if (c_p == rp) + rp_locks &= ~ERTS_PROC_LOCK_MAIN; + + if (rp_locks) + erts_smp_proc_unlock(rp, rp_locks); + } + + erts_cleanup_offheap(&st->off_heap); + + erts_free(ERTS_ALC_T_PROC_SYS_TSK, st); + + return rp ? 1 : 0; +} + +static ERTS_INLINE ErtsProcSysTask * +fetch_sys_task(Process *c_p, erts_aint32_t state, int *qmaskp, int *priop) +{ + ErtsProcSysTaskQs *unused_qs = NULL; + int qbit, qmask; + ErtsProcSysTask *st, **qp; + + *priop = -1; /* Shut up annoying erroneous warning */ + + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS); + + if (!c_p->sys_task_qs) { + qmask = 0; + st = NULL; + goto update_state; + } + + qmask = c_p->sys_task_qs->qmask; + + if ((state & (ERTS_PSFLG_ACTIVE + | ERTS_PSFLG_EXITING + | ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) { + /* No sys tasks if we got exclusively higher prio user work to do */ + st = NULL; + switch (ERTS_PSFLGS_GET_USR_PRIO(state)) { + case PRIORITY_MAX: + if (!(qmask & MAX_BIT)) + goto done; + break; + case PRIORITY_HIGH: + if (!(qmask & (MAX_BIT|HIGH_BIT))) + goto done; + break; + default: + break; + } + } + + qbit = qmask & -qmask; + switch (qbit) { + case MAX_BIT: + qp = &c_p->sys_task_qs->q[PRIORITY_MAX]; + *priop = PRIORITY_MAX; + break; + case HIGH_BIT: + qp = &c_p->sys_task_qs->q[PRIORITY_HIGH]; + *priop = PRIORITY_HIGH; + break; + case NORMAL_BIT: + if (!(qmask & PRIORITY_LOW) + || ++c_p->sys_task_qs->ncount <= RESCHEDULE_LOW) { + qp = &c_p->sys_task_qs->q[PRIORITY_NORMAL]; + *priop = PRIORITY_NORMAL; + break; + } + c_p->sys_task_qs->ncount = 0; + /* Fall through */ + case LOW_BIT: + qp = &c_p->sys_task_qs->q[PRIORITY_LOW]; + *priop = PRIORITY_LOW; + break; + default: + ERTS_INTERNAL_ERROR("Invalid qmask"); + } + + st = *qp; + ASSERT(st); + if (st->next != st) { + *qp = st->next; + st->next->prev = st->prev; + st->prev->next = st->next; + } + else { + erts_aint32_t a, e, n, st_prio, qmask2; + + *qp = NULL; + qmask &= ~qbit; + c_p->sys_task_qs->qmask = qmask; + + update_state: + + qmask2 = qmask; + + if (state & ERTS_PSFLG_DELAYED_SYS) { + ErtsProcSysTaskQs *qs = ERTS_PROC_GET_DELAYED_GC_TASK_QS(c_p); + ASSERT(qs); + qmask2 |= qs->qmask; + } + + switch (qmask2 & -qmask2) { + case MAX_BIT: + st_prio = PRIORITY_MAX; + break; + case HIGH_BIT: + st_prio = PRIORITY_HIGH; + break; + case NORMAL_BIT: + st_prio = PRIORITY_NORMAL; + break; + case LOW_BIT: + case 0: + st_prio = PRIORITY_LOW; + break; + default: + ERTS_INTERNAL_ERROR("Invalid qmask"); + } + + if (!qmask) { + unused_qs = c_p->sys_task_qs; + c_p->sys_task_qs = NULL; + } + + a = state; + do { + erts_aint32_t prio = ERTS_PSFLGS_GET_USR_PRIO(a); + + if (prio > st_prio) + prio = st_prio; + + n = e = a; + + n &= ~ERTS_PSFLGS_ACT_PRIO_MASK; + n |= (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET); + + if (!qmask) + n &= ~ERTS_PSFLG_ACTIVE_SYS; + + if (a == n) + break; + a = erts_smp_atomic32_cmpxchg_nob(&c_p->state, n, e); + } while (a != e); + } + +done: + + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); + + if (unused_qs) + proc_sys_task_queues_free(unused_qs); + + *qmaskp = qmask; + + return st; +} + +static void save_gc_task(Process *c_p, ErtsProcSysTask *st, int prio); + +static int +execute_sys_tasks(Process *c_p, erts_aint32_t *statep, int in_reds) +{ + int garbage_collected = 0; + erts_aint32_t state = *statep; + int reds = in_reds; + int qmask = 0; + + ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCK_MAIN); + + do { + ErtsProcSysTask *st; + int st_prio; + Eterm st_res; + + if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) { +#ifdef ERTS_SMP + if (state & ERTS_PSFLG_PENDING_EXIT) + erts_handle_pending_exit(c_p, ERTS_PROC_LOCK_MAIN); +#endif + ASSERT(ERTS_PROC_IS_EXITING(c_p)); + break; + } + + st = fetch_sys_task(c_p, state, &qmask, &st_prio); + if (!st) + break; + + switch (st->type) { + case ERTS_PSTT_GC: + if (c_p->flags & F_DISABLE_GC) { + save_gc_task(c_p, st, st_prio); + st = NULL; + reds--; + } + else { + if (!garbage_collected) { + FLAGS(c_p) |= F_NEED_FULLSWEEP; + reds -= scheduler_gc_proc(c_p, reds); + garbage_collected = 1; + } + st_res = am_true; + } + break; + case ERTS_PSTT_CPC: { + int fcalls; + int cpc_reds = 0; + if (!ERTS_PROC_GET_SAVED_CALLS_BUF(c_p)) + fcalls = reds; + else + fcalls = reds - CONTEXT_REDS; + st_res = erts_check_process_code(c_p, + st->arg[0], + unsigned_val(st->arg[1]), + &cpc_reds, + fcalls); + reds -= cpc_reds; + if (is_non_value(st_res)) { + /* Needed gc, but gc was disabled */ + save_gc_task(c_p, st, st_prio); + st = NULL; + } + break; + } + case ERTS_PSTT_COHMQ: + reds -= erts_complete_off_heap_message_queue_change(c_p); + st_res = am_true; + break; +#ifdef ERTS_SMP + case ERTS_PSTT_FTMQ: + reds -= erts_flush_trace_messages(c_p, ERTS_PROC_LOCK_MAIN); + st_res = am_true; + break; +#endif + default: + ERTS_INTERNAL_ERROR("Invalid process sys task type"); + st_res = am_false; + } + + if (st) + reds += notify_sys_task_executed(c_p, st, st_res); + + state = erts_smp_atomic32_read_acqb(&c_p->state); + } while (qmask && reds > 0); + + *statep = state; + + if (in_reds < reds) + return in_reds; + + return in_reds - reds; +} + +static int +cleanup_sys_tasks(Process *c_p, erts_aint32_t in_state, int in_reds) +{ + erts_aint32_t state = in_state; + int max_reds = in_reds; + int reds = 0; + int qmask = 0; + + ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCK_MAIN); + + do { + ErtsProcSysTask *st; + Eterm st_res; + int st_prio; + + st = fetch_sys_task(c_p, state, &qmask, &st_prio); + if (!st) + break; + + switch (st->type) { + case ERTS_PSTT_GC: + st_res = am_false; + break; + case ERTS_PSTT_CPC: + st_res = am_false; + break; + case ERTS_PSTT_COHMQ: + st_res = am_false; + break; +#ifdef ERTS_SMP + case ERTS_PSTT_FTMQ: + reds -= erts_flush_trace_messages(c_p, ERTS_PROC_LOCK_MAIN); + st_res = am_true; + break; +#endif + default: + ERTS_INTERNAL_ERROR("Invalid process sys task type"); + st_res = am_false; + break; + } + + reds += notify_sys_task_executed(c_p, st, st_res); + + state = erts_smp_atomic32_read_acqb(&c_p->state); + } while (qmask && reds < max_reds); + + return reds; +} + +BIF_RETTYPE +erts_internal_request_system_task_3(BIF_ALIST_3) +{ + Process *rp = erts_proc_lookup(BIF_ARG_1); + ErtsProcSysTask *st = NULL; + erts_aint32_t prio; + Eterm noproc_res, req_type; + + if (!rp && !is_internal_pid(BIF_ARG_1)) { + if (!is_external_pid(BIF_ARG_1)) + goto badarg; + if (external_pid_dist_entry(BIF_ARG_1) != erts_this_dist_entry) + goto badarg; + } + + switch (BIF_ARG_2) { + case am_max: prio = PRIORITY_MAX; break; + case am_high: prio = PRIORITY_HIGH; break; + case am_normal: prio = PRIORITY_NORMAL; break; + case am_low: prio = PRIORITY_LOW; break; + default: goto badarg; + } + + if (is_not_tuple(BIF_ARG_3)) + goto badarg; + else { + int i; + Eterm *tp = tuple_val(BIF_ARG_3); + Uint arity = arityval(*tp); + Eterm req_id; + Uint req_id_sz; + Eterm arg[ERTS_MAX_PROC_SYS_TASK_ARGS]; + Uint arg_sz[ERTS_MAX_PROC_SYS_TASK_ARGS]; + Uint tot_sz; + Eterm *hp; + + if (arity < 2) + goto badarg; + if (arity > 2 + ERTS_MAX_PROC_SYS_TASK_ARGS) + goto badarg; + req_type = tp[1]; + req_id = tp[2]; + req_id_sz = is_immed(req_id) ? req_id : size_object(req_id); + tot_sz = req_id_sz; + for (i = 0; i < ERTS_MAX_PROC_SYS_TASK_ARGS; i++) { + int tix = 3 + i; + if (tix > arity) { + arg[i] = THE_NON_VALUE; + arg_sz[i] = 0; + } + else { + arg[i] = tp[tix]; + if (is_immed(arg[i])) + arg_sz[i] = 0; + else { + arg_sz[i] = size_object(arg[i]); + tot_sz += arg_sz[i]; + } + } + } + st = erts_alloc(ERTS_ALC_T_PROC_SYS_TSK, + ERTS_PROC_SYS_TASK_SIZE(tot_sz)); + ERTS_INIT_OFF_HEAP(&st->off_heap); + hp = &st->heap[0]; + + st->requester = BIF_P->common.id; + st->reply_tag = req_type; + st->req_id_sz = req_id_sz; + st->req_id = req_id_sz == 0 ? req_id : copy_struct(req_id, + req_id_sz, + &hp, + &st->off_heap); + + for (i = 0; i < ERTS_MAX_PROC_SYS_TASK_ARGS; i++) + st->arg[i] = arg_sz[i] == 0 ? arg[i] : copy_struct(arg[i], + arg_sz[i], + &hp, + &st->off_heap); + ASSERT(&st->heap[0] + tot_sz == hp); + } + + switch (req_type) { + + case am_garbage_collect: + st->type = ERTS_PSTT_GC; + noproc_res = am_false; + if (!rp) + goto noproc; + break; + + case am_check_process_code: + if (is_not_atom(st->arg[0])) + goto badarg; + if (is_not_small(st->arg[1]) || (unsigned_val(st->arg[1]) & ~ERTS_CPC_ALL)) + goto badarg; + noproc_res = am_false; + st->type = ERTS_PSTT_CPC; + if (!rp) + goto noproc; + break; + + default: + goto badarg; + } + + if (!schedule_process_sys_task(rp, prio, st)) { + noproc: + notify_sys_task_executed(BIF_P, st, noproc_res); + } + + BIF_RET(am_ok); + +badarg: + + if (st) { + erts_cleanup_offheap(&st->off_heap); + erts_free(ERTS_ALC_T_PROC_SYS_TSK, st); + } + BIF_ERROR(BIF_P, BADARG); +} + +static void +erts_schedule_generic_sys_task(Eterm pid, ErtsProcSysTaskType type) +{ + Process *rp = erts_proc_lookup(pid); + if (rp) { + ErtsProcSysTask *st; + erts_aint32_t state; + int i; + + st = erts_alloc(ERTS_ALC_T_PROC_SYS_TSK, + ERTS_PROC_SYS_TASK_SIZE(0)); + st->type = type; + st->requester = NIL; + st->reply_tag = NIL; + st->req_id = NIL; + st->req_id_sz = 0; + for (i = 0; i < ERTS_MAX_PROC_SYS_TASK_ARGS; i++) + st->arg[i] = NIL; + ERTS_INIT_OFF_HEAP(&st->off_heap); + state = erts_smp_atomic32_read_nob(&rp->state); + + if (!schedule_process_sys_task(rp, ERTS_PSFLGS_GET_USR_PRIO(state), st)) + erts_free(ERTS_ALC_T_PROC_SYS_TSK, st); + } +} + +void +erts_schedule_complete_off_heap_message_queue_change(Eterm pid) +{ + erts_schedule_generic_sys_task(pid, ERTS_PSTT_COHMQ); +} + +void +erts_schedule_flush_trace_messages(Eterm pid) +{ + erts_schedule_generic_sys_task(pid, ERTS_PSTT_FTMQ); +} + +static void +save_gc_task(Process *c_p, ErtsProcSysTask *st, int prio) +{ + erts_aint32_t state; + ErtsProcSysTaskQs *qs; + + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(c_p)); + + qs = ERTS_PROC_GET_DELAYED_GC_TASK_QS(c_p); + if (!qs) { + st->next = st->prev = st; + qs = proc_sys_task_queues_alloc(); + qs->qmask = 1 << prio; + qs->ncount = 0; + qs->q[PRIORITY_MAX] = NULL; + qs->q[PRIORITY_HIGH] = NULL; + qs->q[PRIORITY_NORMAL] = NULL; + qs->q[PRIORITY_LOW] = NULL; + qs->q[prio] = st; + (void) ERTS_PROC_SET_DELAYED_GC_TASK_QS(c_p, qs); + } + else { + if (!qs->q[prio]) { + st->next = st->prev = st; + qs->q[prio] = st; + qs->qmask |= 1 << prio; + } + else { + st->next = qs->q[prio]; + st->prev = qs->q[prio]->prev; + st->next->prev = st; + st->prev->next = st; + ASSERT(qs->qmask & (1 << prio)); + } + } + + state = erts_smp_atomic32_read_nob(&c_p->state); + ASSERT((ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS) & state); + + while (!(state & ERTS_PSFLG_DELAYED_SYS) + || prio < ERTS_PSFLGS_GET_ACT_PRIO(state)) { + erts_aint32_t n, e; + + n = e = state; + n |= ERTS_PSFLG_DELAYED_SYS; + if (prio < ERTS_PSFLGS_GET_ACT_PRIO(state)) { + n &= ~ERTS_PSFLGS_ACT_PRIO_MASK; + n |= prio << ERTS_PSFLGS_ACT_PRIO_OFFSET; + } + state = erts_smp_atomic32_cmpxchg_relb(&c_p->state, n, e); + if (state == e) + break; + } +} + +int +erts_set_gc_state(Process *c_p, int enable) +{ + ErtsProcSysTaskQs *dgc_tsk_qs; + ASSERT(c_p == erts_get_current_process()); + ASSERT((ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS) + & erts_smp_atomic32_read_nob(&c_p->state)); + ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(c_p)); + + if (!enable) { + c_p->flags |= F_DISABLE_GC; + return 0; + } + + c_p->flags &= ~F_DISABLE_GC; + + dgc_tsk_qs = ERTS_PROC_GET_DELAYED_GC_TASK_QS(c_p); + if (!dgc_tsk_qs) + return 0; + + /* Move delayed gc tasks into sys tasks queues. */ + + erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS); + + if (!c_p->sys_task_qs) { + c_p->sys_task_qs = dgc_tsk_qs; + dgc_tsk_qs = NULL; + } + else { + ErtsProcSysTaskQs *stsk_qs; + int prio; + + /* + * We push delayed tasks to the front of the queue + * since they have already made it to the front + * once and then been delayed after that. + */ + + stsk_qs = c_p->sys_task_qs; + + while (dgc_tsk_qs->qmask) { + int qbit = dgc_tsk_qs->qmask & -dgc_tsk_qs->qmask; + dgc_tsk_qs->qmask &= ~qbit; + switch (qbit) { + case MAX_BIT: + prio = PRIORITY_MAX; + break; + case HIGH_BIT: + prio = PRIORITY_HIGH; + break; + case NORMAL_BIT: + prio = PRIORITY_NORMAL; + break; + case LOW_BIT: + prio = PRIORITY_LOW; + break; + default: + ERTS_INTERNAL_ERROR("Invalid qmask"); + prio = -1; + break; + } + + ASSERT(dgc_tsk_qs->q[prio]); + + if (!stsk_qs->q[prio]) { + stsk_qs->q[prio] = dgc_tsk_qs->q[prio]; + stsk_qs->qmask |= 1 << prio; + } + else { + ErtsProcSysTask *first1, *last1, *first2, *last2; + + ASSERT(stsk_qs->qmask & (1 << prio)); + first1 = dgc_tsk_qs->q[prio]; + last1 = first1->prev; + first2 = stsk_qs->q[prio]; + last2 = first1->prev; + + last1->next = first2; + first2->prev = last1; + + first1->prev = last2; + last2->next = first1; + + stsk_qs->q[prio] = first1; + } + + } + } + +#ifdef DEBUG + { + int qmask; + erts_aint32_t aprio, state = +#endif + + erts_smp_atomic32_read_bset_nob(&c_p->state, + (ERTS_PSFLG_DELAYED_SYS + | ERTS_PSFLG_ACTIVE_SYS), + ERTS_PSFLG_ACTIVE_SYS); + +#ifdef DEBUG + ASSERT(state & ERTS_PSFLG_DELAYED_SYS); + qmask = c_p->sys_task_qs->qmask; + aprio = ERTS_PSFLGS_GET_ACT_PRIO(state); + ASSERT(ERTS_PSFLGS_GET_USR_PRIO(state) >= aprio); + ASSERT((qmask & -qmask) >= (1 << aprio)); + } +#endif + + erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS); + + (void) ERTS_PROC_SET_DELAYED_GC_TASK_QS(c_p, NULL); + + if (dgc_tsk_qs) + proc_sys_task_queues_free(dgc_tsk_qs); + + return 1; +} + void erts_sched_stat_modify(int what) { @@ -7237,7 +10819,7 @@ erts_sched_stat_modify(int what) break; case ERTS_SCHED_STAT_MODIFY_DISABLE: erts_smp_thr_progress_block(); - erts_sched_stat.enabled = 1; + erts_sched_stat.enabled = 0; erts_smp_thr_progress_unblock(); break; case ERTS_SCHED_STAT_MODIFY_CLEAR: @@ -7324,6 +10906,10 @@ erts_schedule_misc_op(void (*func)(void *), void *arg) rq->misc.start = molp; rq->misc.end = molp; +#ifdef ERTS_SMP + non_empty_runq(rq); +#endif + erts_smp_runq_unlock(rq); smp_notify_inc_runq(rq); @@ -7409,12 +10995,18 @@ erts_get_exact_total_reductions(Process *c_p, Uint *redsp, Uint *diffp) erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MAIN); } +static void delete_process(Process* p); + void erts_free_proc(Process *p) { #ifdef ERTS_SMP erts_proc_lock_fin(p); #endif + ASSERT(erts_smp_atomic32_read_nob(&p->state) & ERTS_PSFLG_FREE); + ASSERT(0 == erts_proc_read_refc(p)); + if (p->flags & F_DELAYED_DEL_PROC) + delete_process(p); erts_free(ERTS_ALC_T_PROC, (void *) p); } @@ -7430,6 +11022,9 @@ static void early_init_process_struct(void *varg, Eterm data) Process *proc = arg->proc; proc->common.id = make_internal_pid(data); +#ifdef ERTS_DIRTY_SCHEDULERS + erts_smp_atomic32_init_nob(&proc->dirty_state, 0); +#endif erts_smp_atomic32_init_relb(&proc->state, arg->state); #ifdef ERTS_SMP @@ -7457,7 +11052,7 @@ alloc_process(ErtsRunQueue *rq, erts_aint32_t state) init_arg.run_queue = rq; init_arg.state = state; - ASSERT(((char *) p) == ((char *) &p->common)); + ERTS_CT_ASSERT(offsetof(Process,common) == 0); if (!erts_ptab_new_element(&erts_proc, &p->common, @@ -7467,10 +11062,13 @@ alloc_process(ErtsRunQueue *rq, erts_aint32_t state) return NULL; } + ASSERT(erts_proc_read_refc(p) > 0); + ASSERT(internal_pid_serial(p->common.id) <= ERTS_MAX_PID_SERIAL); p->approx_started = erts_get_approx_time(); p->rcount = 0; + p->heap = NULL; ASSERT(p == (Process *) (erts_ptab_pix2intptr_nob( @@ -7487,6 +11085,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). Eterm args, /* Arguments for function (must be well-formed list). */ ErlSpawnOpts* so) /* Options for spawn. */ { + Uint flags = 0; ErtsRunQueue *rq = NULL; Process *p; Sint arity; /* Number of arguments. */ @@ -7496,16 +11095,19 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). Eterm res = THE_NON_VALUE; erts_aint32_t state = 0; erts_aint32_t prio = (erts_aint32_t) PRIORITY_NORMAL; + ErtsProcLocks locks = ERTS_PROC_LOCKS_ALL; +#ifdef SHCOPY_SPAWN + erts_shcopy_t info; + INITIALIZE_SHCOPY(info); +#endif -#ifdef ERTS_SMP erts_smp_proc_lock(parent, ERTS_PROC_LOCKS_ALL_MINOR); -#endif /* * Check for errors. */ - if (is_not_atom(mod) || is_not_atom(func) || ((arity = list_length(args)) < 0)) { + if (is_not_atom(mod) || is_not_atom(func) || ((arity = erts_list_length(args)) < 0)) { so->error_code = BADARG; goto error; } @@ -7515,12 +11117,25 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). int ix = so->scheduler-1; ASSERT(0 <= ix && ix < erts_no_run_queues); rq = ERTS_RUNQ_IX(ix); + /* Unsupported feature... */ state |= ERTS_PSFLG_BOUND; } prio = (erts_aint32_t) so->priority; } - state |= (prio & ERTS_PSFLG_PRIO_MASK); + state |= (((prio & ERTS_PSFLGS_PRIO_MASK) << ERTS_PSFLGS_ACT_PRIO_OFFSET) + | ((prio & ERTS_PSFLGS_PRIO_MASK) << ERTS_PSFLGS_USR_PRIO_OFFSET)); + + if (so->flags & SPO_OFF_HEAP_MSGQ) { + state |= ERTS_PSFLG_OFF_HEAP_MSGQ; + flags |= F_OFF_HEAP_MSGQ; + } + else if (so->flags & SPO_ON_HEAP_MSGQ) { + state |= ERTS_PSFLG_ON_HEAP_MSGQ; + flags |= F_ON_HEAP_MSGQ; + } + + ASSERT((flags & F_ON_HEAP_MSGQ) || (flags & F_OFF_HEAP_MSGQ)); if (!rq) rq = erts_get_runq_proc(parent); @@ -7534,33 +11149,49 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). goto error; } + ASSERT((erts_smp_atomic32_read_nob(&p->state) + & ERTS_PSFLG_ON_HEAP_MSGQ) + || (erts_smp_atomic32_read_nob(&p->state) + & ERTS_PSFLG_OFF_HEAP_MSGQ)); + #ifdef BM_COUNTERS processes_busy++; #endif BM_COUNT(processes_spawned); BM_SWAP_TIMER(system,size); +#ifdef SHCOPY_SPAWN + arg_size = copy_shared_calculate(args, &info); +#else arg_size = size_object(args); +#endif BM_SWAP_TIMER(size,system); heap_need = arg_size; - p->flags = erts_default_process_flags; + p->flags = flags; + p->static_flags = 0; + if (so->flags & SPO_SYSTEM_PROC) + p->static_flags |= ERTS_STC_FLG_SYSTEM_PROC; if (so->flags & SPO_USE_ARGS) { p->min_heap_size = so->min_heap_size; p->min_vheap_size = so->min_vheap_size; p->max_gen_gcs = so->max_gen_gcs; + MAX_HEAP_SIZE_SET(p, so->max_heap_size); + MAX_HEAP_SIZE_FLAGS_SET(p, so->max_heap_flags); } else { p->min_heap_size = H_MIN_SIZE; p->min_vheap_size = BIN_VH_MIN_SIZE; + MAX_HEAP_SIZE_SET(p, H_MAX_SIZE); + MAX_HEAP_SIZE_FLAGS_SET(p, H_MAX_FLAGS); p->max_gen_gcs = (Uint16) erts_smp_atomic32_read_nob(&erts_max_gen_gcs); } p->schedule_count = 0; ASSERT(p->min_heap_size == erts_next_heap_size(p->min_heap_size, 0)); - p->initial[INITIAL_MOD] = mod; - p->initial[INITIAL_FUN] = func; - p->initial[INITIAL_ARI] = (Uint) arity; + p->u.initial[INITIAL_MOD] = mod; + p->u.initial[INITIAL_FUN] = func; + p->u.initial[INITIAL_ARI] = (Uint) arity; /* * Must initialize binary lists here before copying binaries to process. @@ -7583,7 +11214,6 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). hipe_init_process_smp(&p->hipe_smp); #endif #endif - p->heap = (Eterm *) ERTS_HEAP_ALLOC(ERTS_ALC_T_HEAP, sizeof(Eterm)*sz); p->old_hend = p->old_htop = p->old_heap = NULL; p->high_water = p->heap; @@ -7591,17 +11221,19 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->stop = p->hend = p->heap + sz; p->htop = p->heap; p->heap_sz = sz; + p->abandoned_heap = NULL; + p->live_hf_end = ERTS_INVALID_HFRAG_PTR; p->catches = 0; - p->extra_root = NULL; p->bin_vheap_sz = p->min_vheap_size; p->bin_old_vheap_sz = p->min_vheap_size; p->bin_old_vheap = 0; - p->bin_vheap_mature = 0; + + p->sys_task_qs = NULL; /* No need to initialize p->fcalls. */ - p->current = p->initial+INITIAL_MOD; + p->current = p->u.initial+INITIAL_MOD; p->i = (BeamInstr *) beam_apply; p->cp = (BeamInstr *) beam_apply+1; @@ -7614,7 +11246,12 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). BM_MESSAGE(args,p,parent); BM_START_TIMER(system); BM_SWAP_TIMER(system,copy); +#ifdef SHCOPY_SPAWN + p->arg_reg[2] = copy_shared_perform(args, arg_size, &info, &p->htop, &p->off_heap); + DESTROY_SHCOPY(info); +#else p->arg_reg[2] = copy_struct(args, arg_size, &p->htop, &p->off_heap); +#endif BM_MESSAGE_COPIED(arg_size); BM_SWAP_TIMER(copy,system); p->arity = 3; @@ -7624,11 +11261,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->ftrace = NIL; p->reds = 0; -#ifdef ERTS_SMP - p->common.u.alive.ptimer = NULL; -#else - sys_memset(&p->common.u.alive.tm, 0, sizeof(ErlTimer)); -#endif + ERTS_PTMR_INIT(p); p->common.u.alive.reg = NULL; ERTS_P_LINKS(p) = NULL; @@ -7648,7 +11281,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). : STORE_NC(&p->htop, &p->off_heap, parent->group_leader); } - erts_get_default_tracing(&ERTS_TRACE_FLAGS(p), &ERTS_TRACER_PROC(p)); + erts_get_default_proc_tracing(&ERTS_TRACE_FLAGS(p), &ERTS_TRACER(p)); p->msg.first = NULL; p->msg.last = &p->msg.first; @@ -7659,10 +11292,14 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->msg_inq.last = &p->msg_inq.first; p->msg_inq.len = 0; #endif - p->u.bif_timers = NULL; + p->bif_timers = NULL; +#ifdef ERTS_BTM_ACCESSOR_SUPPORT + p->accessor_bif_timers = NULL; +#endif p->mbuf = NULL; + p->msg_frag = NULL; p->mbuf_sz = 0; - p->psd = NULL; + erts_smp_atomic_init_nob(&p->psd, (erts_aint_t) NULL); p->dictionary = NULL; p->seq_trace_lastcnt = 0; p->seq_trace_clock = 0; @@ -7680,21 +11317,60 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). p->last_old_htop = NULL; #endif +#ifdef ERTS_SMP + p->trace_msg_q = NULL; + p->scheduler_data = NULL; + p->suspendee = NIL; + p->pending_suspenders = NULL; + p->pending_exit.reason = THE_NON_VALUE; + p->pending_exit.bp = NULL; +#endif + +#if !defined(NO_FPE_SIGNALS) || defined(HIPE) + p->fp_exception = 0; +#endif + if (IS_TRACED(parent)) { if (ERTS_TRACE_FLAGS(parent) & F_TRACE_SOS) { ERTS_TRACE_FLAGS(p) |= (ERTS_TRACE_FLAGS(parent) & TRACEE_FLAGS); - ERTS_TRACER_PROC(p) = ERTS_TRACER_PROC(parent); - } - if (ARE_TRACE_FLAGS_ON(parent, F_TRACE_PROCS)) { - trace_proc_spawn(parent, p->common.id, mod, func, args); + erts_tracer_replace(&p->common, ERTS_TRACER(parent)); } - if (ERTS_TRACE_FLAGS(parent) & F_TRACE_SOS1) { + if (ERTS_TRACE_FLAGS(parent) & F_TRACE_SOS1) { /* Overrides TRACE_CHILDREN */ ERTS_TRACE_FLAGS(p) |= (ERTS_TRACE_FLAGS(parent) & TRACEE_FLAGS); - ERTS_TRACER_PROC(p) = ERTS_TRACER_PROC(parent); + erts_tracer_replace(&p->common, ERTS_TRACER(parent)); ERTS_TRACE_FLAGS(p) &= ~(F_TRACE_SOS1 | F_TRACE_SOS); ERTS_TRACE_FLAGS(parent) &= ~(F_TRACE_SOS1 | F_TRACE_SOS); } + if (so->flags & SPO_LINK && ERTS_TRACE_FLAGS(parent) & (F_TRACE_SOL|F_TRACE_SOL1)) { + ERTS_TRACE_FLAGS(p) |= (ERTS_TRACE_FLAGS(parent)&TRACEE_FLAGS); + erts_tracer_replace(&p->common, ERTS_TRACER(parent)); + if (ERTS_TRACE_FLAGS(parent) & F_TRACE_SOL1) {/*maybe override*/ + ERTS_TRACE_FLAGS(p) &= ~(F_TRACE_SOL1 | F_TRACE_SOL); + ERTS_TRACE_FLAGS(parent) &= ~(F_TRACE_SOL1 | F_TRACE_SOL); + } + } + if (ARE_TRACE_FLAGS_ON(parent, F_TRACE_PROCS)) { + locks &= ~(ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + erts_smp_proc_unlock(parent, ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + trace_proc_spawn(parent, am_spawn, p->common.id, mod, func, args); + if (so->flags & SPO_LINK) + trace_proc(parent, locks, parent, am_link, p->common.id); + } + } + + if (IS_TRACED_FL(p, F_TRACE_PROCS)) { + if ((locks & (ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE)) + == (ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE)) { + /* This happens when parent was not traced, but child is */ + locks &= ~(ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + erts_smp_proc_unlock(parent, ERTS_PROC_LOCK_STATUS|ERTS_PROC_LOCK_TRACE); + } + trace_proc_spawn(p, am_spawned, parent->common.id, mod, func, args); + if (so->flags & SPO_LINK) + trace_proc(p, locks, p, am_getting_linked, parent->common.id); } /* @@ -7705,10 +11381,6 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). #ifdef DEBUG int ret; #endif - if (IS_TRACED_FL(parent, F_TRACE_PROCS)) { - trace_proc(parent, parent, am_link, p->common.id); - } - #ifdef DEBUG ret = erts_add_link(&ERTS_P_LINKS(parent), LINK_PID, p->common.id); ASSERT(ret == 0); @@ -7719,17 +11391,6 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). erts_add_link(&ERTS_P_LINKS(p), LINK_PID, parent->common.id); #endif - if (IS_TRACED(parent)) { - if (ERTS_TRACE_FLAGS(parent) & (F_TRACE_SOL|F_TRACE_SOL1)) { - ERTS_TRACE_FLAGS(p) |= (ERTS_TRACE_FLAGS(parent)&TRACEE_FLAGS); - ERTS_TRACER_PROC(p) = ERTS_TRACER_PROC(parent); /*maybe steal*/ - - if (ERTS_TRACE_FLAGS(parent) & F_TRACE_SOL1) {/*maybe override*/ - ERTS_TRACE_FLAGS(p) &= ~(F_TRACE_SOL1 | F_TRACE_SOL); - ERTS_TRACE_FLAGS(parent) &= ~(F_TRACE_SOL1 | F_TRACE_SOL); - } - } - } } /* @@ -7744,19 +11405,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). so->mref = mref; } -#ifdef ERTS_SMP - p->scheduler_data = NULL; - p->suspendee = NIL; - p->pending_suspenders = NULL; - p->pending_exit.reason = THE_NON_VALUE; - p->pending_exit.bp = NULL; -#endif - -#if !defined(NO_FPE_SIGNALS) || defined(HIPE) - p->fp_exception = 0; -#endif - - erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + erts_smp_proc_unlock(p, locks); res = p->common.id; @@ -7764,6 +11413,8 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). * Schedule process for execution. */ + erts_smp_proc_unlock(parent, locks & ERTS_PROC_LOCKS_ALL_MINOR); + schedule_process(p, state, 0); VERBOSE(DEBUG_PROCESSES, ("Created a new process: %T\n",p->common.id)); @@ -7777,10 +11428,11 @@ erl_create_process(Process* parent, /* Parent of process (default group leader). DTRACE2(process_spawn, process_name, mfa); } #endif + return res; error: - erts_smp_proc_unlock(parent, ERTS_PROC_LOCKS_ALL_MINOR); + erts_smp_proc_unlock(parent, locks & ERTS_PROC_LOCKS_ALL_MINOR); return res; } @@ -7796,6 +11448,8 @@ void erts_init_empty_process(Process *p) p->stop = NULL; p->hend = NULL; p->heap = NULL; + p->abandoned_heap = NULL; + p->live_hf_end = ERTS_INVALID_HFRAG_PTR; p->gen_gcs = 0; p->max_gen_gcs = 0; p->min_heap_size = 0; @@ -7803,7 +11457,7 @@ void erts_init_empty_process(Process *p) p->rcount = 0; p->common.id = ERTS_INVALID_PID; p->reds = 0; - ERTS_TRACER_PROC(p) = NIL; + ERTS_TRACER(p) = erts_tracer_nil; ERTS_TRACE_FLAGS(p) = F_INITIAL_TRACE_FLAGS; p->group_leader = ERTS_INVALID_PID; p->flags = 0; @@ -7815,12 +11469,8 @@ void erts_init_empty_process(Process *p) p->bin_vheap_sz = BIN_VH_MIN_SIZE; p->bin_old_vheap_sz = BIN_VH_MIN_SIZE; p->bin_old_vheap = 0; - p->bin_vheap_mature = 0; -#ifdef ERTS_SMP - p->common.u.alive.ptimer = NULL; -#else - memset(&(p->common.u.alive.tm), 0, sizeof(ErlTimer)); -#endif + p->sys_task_qs = NULL; + ERTS_PTMR_INIT(p); p->next = NULL; p->off_heap.first = NULL; p->off_heap.overhead = 0; @@ -7831,8 +11481,9 @@ void erts_init_empty_process(Process *p) p->old_htop = NULL; p->old_heap = NULL; p->mbuf = NULL; + p->msg_frag = NULL; p->mbuf_sz = 0; - p->psd = NULL; + erts_smp_atomic_init_nob(&p->psd, (erts_aint_t) NULL); ERTS_P_MONITORS(p) = NULL; ERTS_P_LINKS(p) = NULL; /* List of links */ p->nodes_monitors = NULL; @@ -7841,14 +11492,17 @@ void erts_init_empty_process(Process *p) p->msg.last = &p->msg.first; p->msg.save = &p->msg.first; p->msg.len = 0; - p->u.bif_timers = NULL; + p->bif_timers = NULL; +#ifdef ERTS_BTM_ACCESSOR_SUPPORT + p->accessor_bif_timers = NULL; +#endif p->dictionary = NULL; p->seq_trace_clock = 0; p->seq_trace_lastcnt = 0; p->seq_trace_token = NIL; - p->initial[0] = 0; - p->initial[1] = 0; - p->initial[2] = 0; + p->u.initial[0] = 0; + p->u.initial[1] = 0; + p->u.initial[2] = 0; p->catches = 0; p->cp = NULL; p->i = NULL; @@ -7869,6 +11523,8 @@ void erts_init_empty_process(Process *p) p->parent = NIL; p->approx_started = 0; + p->static_flags = 0; + p->common.u.alive.started_interval = 0; #ifdef HIPE @@ -7883,6 +11539,9 @@ void erts_init_empty_process(Process *p) p->last_old_htop = NULL; #endif +#ifdef ERTS_DIRTY_SCHEDULERS + erts_smp_atomic32_init_nob(&p->dirty_state, 0); +#endif erts_smp_atomic32_init_nob(&p->state, (erts_aint32_t) PRIORITY_NORMAL); #ifdef ERTS_SMP @@ -7914,9 +11573,11 @@ erts_debug_verify_clean_empty_process(Process* p) ASSERT(p->htop == NULL); ASSERT(p->stop == NULL); ASSERT(p->hend == NULL); + ASSERT(p->abandoned_heap == NULL); + ASSERT(p->live_hf_end == ERTS_INVALID_HFRAG_PTR); ASSERT(p->heap == NULL); ASSERT(p->common.id == ERTS_INVALID_PID); - ASSERT(ERTS_TRACER_PROC(p) == NIL); + ASSERT(ERTS_TRACER_IS_NIL(ERTS_TRACER(p))); ASSERT(ERTS_TRACE_FLAGS(p) == F_INITIAL_TRACE_FLAGS); ASSERT(p->group_leader == ERTS_INVALID_PID); ASSERT(p->next == NULL); @@ -7933,7 +11594,10 @@ erts_debug_verify_clean_empty_process(Process* p) ASSERT(p->suspend_monitors == NULL); ASSERT(p->msg.first == NULL); ASSERT(p->msg.len == 0); - ASSERT(p->u.bif_timers == NULL); + ASSERT(p->bif_timers == NULL); +#ifdef ERTS_BTM_ACCESSOR_SUPPORT + ASSERT(p->accessor_bif_timers == NULL); +#endif ASSERT(p->dictionary == NULL); ASSERT(p->catches == 0); ASSERT(p->cp == NULL); @@ -7982,20 +11646,42 @@ erts_cleanup_empty_process(Process* p) #endif } -/* - * p must be the currently executing process. - */ static void delete_process(Process* p) { - ErlMessage* mp; + Eterm *heap; + ErtsPSD *psd; + struct saved_calls *scb; + process_breakpoint_time_t *pbt; + void *nif_export; VERBOSE(DEBUG_PROCESSES, ("Removing process: %T\n",p->common.id)); + VERBOSE(DEBUG_SHCOPY, ("[pid=%T] delete process: %p %p %p %p\n", p->common.id, + HEAP_START(p), HEAP_END(p), OLD_HEAP(p), OLD_HEND(p))); + + scb = ERTS_PROC_SET_SAVED_CALLS_BUF(p, NULL); + + if (scb) { + p->fcalls += CONTEXT_REDS; /* Reduction counting depends on this... */ + erts_free(ERTS_ALC_T_CALLS_BUF, (void *) scb); + } + + pbt = ERTS_PROC_SET_CALL_TIME(p, NULL); + if (pbt) + erts_free(ERTS_ALC_T_BPD, (void *) pbt); + + nif_export = ERTS_PROC_SET_NIF_TRAP_EXPORT(p, NULL); + if (nif_export) + erts_destroy_nif_export(nif_export); /* Cleanup psd */ - if (p->psd) - erts_free(ERTS_ALC_T_PSD, p->psd); + psd = (ErtsPSD *) erts_smp_atomic_read_nob(&p->psd); + + if (psd) { + erts_smp_atomic_set_nob(&p->psd, (erts_aint_t) NULL); /* Reduction counting depends on this... */ + erts_free(ERTS_ALC_T_PSD, psd); + } /* Clean binaries and funs */ erts_cleanup_offheap(&p->off_heap); @@ -8014,16 +11700,17 @@ delete_process(Process* p) * Release heaps. Clobber contents in DEBUG build. */ - -#ifdef DEBUG - sys_memset(p->heap, DEBUG_BAD_BYTE, p->heap_sz*sizeof(Eterm)); -#endif - #ifdef HIPE hipe_delete_process(&p->hipe); #endif - ERTS_HEAP_FREE(ERTS_ALC_T_HEAP, (void*) p->heap, p->heap_sz*sizeof(Eterm)); + heap = p->abandoned_heap ? p->abandoned_heap : p->heap; + +#ifdef DEBUG + sys_memset(heap, DEBUG_BAD_BYTE, p->heap_sz*sizeof(Eterm)); +#endif + + ERTS_HEAP_FREE(ERTS_ALC_T_HEAP, (void*) heap, p->heap_sz*sizeof(Eterm)); if (p->old_heap != NULL) { #ifdef DEBUG @@ -8042,27 +11729,14 @@ delete_process(Process* p) free_message_buffer(p->mbuf); } + if (p->msg_frag) + erts_cleanup_messages(p->msg_frag); + erts_erase_dicts(p); /* free all pending messages */ - mp = p->msg.first; - while(mp != NULL) { - ErlMessage* next_mp = mp->next; - if (mp->data.attached) { - if (is_value(mp->m[0])) - free_message_buffer(mp->data.heap_frag); - else { - if (is_not_nil(mp->m[1])) { - ErlHeapFragment *heap_frag; - heap_frag = (ErlHeapFragment *) mp->data.dist_ext->ext_endp; - erts_cleanup_offheap(&heap_frag->off_heap); - } - erts_free_dist_ext_copy(mp->data.dist_ext); - } - } - free_message(mp); - mp = next_mp; - } + erts_cleanup_messages(p->msg.first); + p->msg.first = NULL; ASSERT(!p->nodes_monitors); ASSERT(!p->suspend_monitors); @@ -8070,33 +11744,24 @@ delete_process(Process* p) p->fvalue = NIL; } -static ERTS_INLINE erts_aint32_t -set_proc_exiting_state(Process *p, erts_aint32_t state) -{ - erts_aint32_t a, n, e; - a = state; - while (1) { - n = e = a; - n &= ~(ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT); - n |= ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE; - if (!(a & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING))) - n |= ERTS_PSFLG_IN_RUNQ; - a = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e); - if (a == e) - break; - } - return a; -} - static ERTS_INLINE void set_proc_exiting(Process *p, - erts_aint32_t state, + erts_aint32_t in_state, Eterm reason, ErlHeapFragment *bp) { + erts_aint32_t state = in_state, enq_prio = -1; + int enqueue; ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(p) == ERTS_PROC_LOCKS_ALL); - state = set_proc_exiting_state(p, state); + enqueue = change_proc_schedule_state(p, + (ERTS_PSFLG_SUSPENDED + | ERTS_PSFLG_PENDING_EXIT + | ERTS_PSFLGS_DIRTY_WORK), + ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE, + &state, + &enq_prio, + ERTS_PROC_LOCKS_ALL); p->fvalue = reason; if (bp) @@ -8108,18 +11773,57 @@ set_proc_exiting(Process *p, */ p->freason = EXTAG_EXIT; KILL_CATCHES(p); - cancel_timer(p); p->i = (BeamInstr *) beam_exit; - if (erts_system_profile_flags.runnable_procs - && !(state & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) { - profile_runnable_proc(p, am_active); +#ifndef ERTS_SMP + if (state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS) + && !(state & ERTS_PSFLG_GC)) { + /* + * I non smp case: + * + * Currently executing process might be sent an exit + * signal if it is traced by a port that it also is + * linked to, and the port terminates during the + * trace. In this case we want schedule out the + * process as quickly as possible in order to detect + * the event as fast as possible. + */ + ERTS_VBUMP_ALL_REDS(p); } +#endif - if (!(state & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING))) - add2runq(p, state); + add2runq(enqueue, enq_prio, p, state, NULL); } +static ERTS_INLINE erts_aint32_t +set_proc_self_exiting(Process *c_p) +{ +#ifdef DEBUG + int enqueue; +#endif + erts_aint32_t state, enq_prio = -1; + + ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCKS_ALL); + + state = erts_smp_atomic32_read_nob(&c_p->state); + ASSERT(state & (ERTS_PSFLG_RUNNING + |ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS)); + +#ifdef DEBUG + enqueue = +#endif + change_proc_schedule_state(c_p, + ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT, + ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE, + &state, + &enq_prio, + ERTS_PROC_LOCKS_ALL); + + ASSERT(!enqueue); + return state; +} #ifdef ERTS_SMP @@ -8155,49 +11859,85 @@ erts_handle_pending_exit(Process *c_p, ErtsProcLocks locks) erts_smp_proc_unlock(c_p, xlocks); } +static void save_pending_exiter(Process *p, ErtsProcList *plp); + static void -handle_pending_exiters(ErtsProcList *pnd_xtrs) +do_handle_pending_exiters(ErtsProcList *pnd_xtrs) { /* 'list' is expected to have been fetched (i.e. not a ring anymore) */ ErtsProcList *plp = pnd_xtrs; while (plp) { - ErtsProcList *free_plp; - Process *p = erts_pid2proc(NULL, 0, plp->pid, ERTS_PROC_LOCKS_ALL); + ErtsProcList *next_plp = plp->next; + Process *p = erts_proc_lookup(plp->pid); if (p) { - if (erts_proclist_same(plp, p)) { - erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state); - if (!(state & ERTS_PSFLG_RUNNING)) { - ASSERT(state & ERTS_PSFLG_PENDING_EXIT); - erts_handle_pending_exit(p, ERTS_PROC_LOCKS_ALL); + erts_aint32_t state; + /* + * If the process is running on a normal scheduler, the + * pending exit will soon be detected and handled by the + * scheduler running the process (at schedule in/out). + */ + if (erts_smp_proc_trylock(p, ERTS_PROC_LOCKS_ALL) != EBUSY) { + if (erts_proclist_same(plp, p)) { + state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_EXITING))) { + ASSERT(state & ERTS_PSFLG_PENDING_EXIT); + erts_handle_pending_exit(p, ERTS_PROC_LOCKS_ALL); + } } + erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); + } + else { + erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS); + if (erts_proclist_same(plp, p)) { + state = erts_smp_atomic32_read_acqb(&p->state); + if (!(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_EXITING))) { + /* + * Save process and try to acquire all + * locks at a later time... + */ + save_pending_exiter(p, plp); + plp = NULL; + } + } + erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS); } - erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); } - free_plp = plp; - plp = plp->next; - proclist_destroy(free_plp); + if (plp) + proclist_destroy(plp); + plp = next_plp; } } static void -save_pending_exiter(Process *p) +save_pending_exiter(Process *p, ErtsProcList *plp) { - ErtsProcList *plp; + ErtsSchedulerSleepInfo *ssi; ErtsRunQueue *rq; ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)); - rq = erts_get_runq_current(NULL); + rq = RUNQ_READ_RQ(&p->run_queue); + ASSERT(rq && !ERTS_RUNQ_IX_IS_DIRTY(rq->ix)); - plp = proclist_create(p); + if (!plp) + plp = proclist_create(p); erts_smp_runq_lock(rq); erts_proclist_store_last(&rq->procs.pending_exiters, plp); + non_empty_runq(rq); + + ssi = rq->scheduler->ssi; + erts_smp_runq_unlock(rq); - wake_scheduler(rq, 1); + + set_aux_work_flags_wakeup_nob(ssi, ERTS_SSI_AUX_WORK_PENDING_EXITERS); } #endif @@ -8211,43 +11951,47 @@ static ERTS_INLINE void send_exit_message(Process *to, ErtsProcLocks *to_locksp, Eterm exit_term, Uint term_size, Eterm token) { - if (token == NIL -#ifdef USE_VM_PROBES - || token == am_have_dt_utag -#endif - ) { - Eterm* hp; - Eterm mess; - ErlHeapFragment* bp; - ErlOffHeap *ohp; - - hp = erts_alloc_message_heap(term_size, &bp, &ohp, to, to_locksp); + ErtsMessage *mp; + ErlOffHeap *ohp; + Eterm* hp; + Eterm mess; +#ifdef SHCOPY_SEND + erts_shcopy_t info; +#endif + + if (!have_seqtrace(token)) { +#ifdef SHCOPY_SEND + INITIALIZE_SHCOPY(info); + term_size = copy_shared_calculate(exit_term, &info); + mp = erts_alloc_message_heap(to, to_locksp, term_size, &hp, &ohp); + mess = copy_shared_perform(exit_term, term_size, &info, &hp, ohp); + DESTROY_SHCOPY(info); +#else + mp = erts_alloc_message_heap(to, to_locksp, term_size, &hp, &ohp); mess = copy_struct(exit_term, term_size, &hp, ohp); - erts_queue_message(to, to_locksp, bp, mess, NIL -#ifdef USE_VM_PROBES - , NIL #endif - ); + erts_queue_message(to, *to_locksp, mp, mess, am_system); } else { - ErlHeapFragment* bp; - Eterm* hp; - Eterm mess; Eterm temp_token; Uint sz_token; ASSERT(is_tuple(token)); sz_token = size_object(token); - bp = new_message_buffer(term_size+sz_token); - hp = bp->mem; - mess = copy_struct(exit_term, term_size, &hp, &bp->off_heap); - /* the trace token must in this case be updated by the caller */ - seq_trace_output(token, mess, SEQ_TRACE_SEND, to->common.id, NULL); - temp_token = copy_struct(token, sz_token, &hp, &bp->off_heap); - erts_queue_message(to, to_locksp, bp, mess, temp_token -#ifdef USE_VM_PROBES - , NIL +#ifdef SHCOPY_SEND + INITIALIZE_SHCOPY(info); + term_size = copy_shared_calculate(exit_term, &info); + mp = erts_alloc_message_heap(to, to_locksp, term_size+sz_token, &hp, &ohp); + mess = copy_shared_perform(exit_term, term_size, &info, &hp, ohp); + DESTROY_SHCOPY(info); +#else + mp = erts_alloc_message_heap(to, to_locksp, term_size+sz_token, &hp, &ohp); + mess = copy_struct(exit_term, term_size, &hp, ohp); #endif - ); + /* the trace token must in this case be updated by the caller */ + seq_trace_output(token, mess, SEQ_TRACE_SEND, to->common.id, to); + temp_token = copy_struct(token, sz_token, &hp, ohp); + ERL_MESSAGE_TOKEN(mp) = temp_token; + erts_queue_message(to, *to_locksp, mp, mess, am_system); } } @@ -8349,18 +12093,17 @@ send_exit_signal(Process *c_p, /* current process if and only dtrace_pid_str(from, sender_str); dtrace_proc_str(rp, receiver_str); - erts_snprintf(reason_buf, sizeof(reason_buf) - 1, "%T", reason); + erts_snprintf(reason_buf, sizeof(DTRACE_CHARBUF_NAME(reason_buf)) - 1, "%T", reason); DTRACE3(process_exit_signal, sender_str, receiver_str, reason_buf); } #endif if ((state & ERTS_PSFLG_TRAP_EXIT) && (reason != am_kill || (flags & ERTS_XSIG_FLG_IGN_KILL))) { - if (is_not_nil(token) -#ifdef USE_VM_PROBES - && token != am_have_dt_utag -#endif - && token_update) + /* have to release the status lock in order to send the exit message */ + erts_smp_proc_unlock(rp, *rp_locks & ERTS_PROC_LOCKS_XSIG_SEND); + *rp_locks &= ~ERTS_PROC_LOCKS_XSIG_SEND; + if (have_seqtrace(token) && token_update) seq_trace_update_send(token_update); if (is_value(exit_tuple)) send_exit_message(rp, rp_locks, exit_tuple, exit_tuple_sz, token); @@ -8388,29 +12131,27 @@ send_exit_signal(Process *c_p, /* current process if and only } set_proc_exiting(c_p, state, rsn, NULL); } - else if (!(state & ERTS_PSFLG_RUNNING)) { + else if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS))) { /* Process not running ... */ ErtsProcLocks need_locks = ~(*rp_locks) & ERTS_PROC_LOCKS_ALL; if (need_locks && erts_smp_proc_trylock(rp, need_locks) == EBUSY) { /* ... but we havn't got all locks on it ... */ - save_pending_exiter(rp); + save_pending_exiter(rp, NULL); /* * The pending exit will be discovered when next * process is scheduled in */ - goto set_pending_exit; - } - else { - /* ...and we have all locks on it... */ - *rp_locks = ERTS_PROC_LOCKS_ALL; - set_proc_exiting(rp, - state, - (is_immed(rsn) - ? rsn - : copy_object(rsn, rp)), - NULL); + goto set_pending_exit; } + /* ...and we have all locks on it... */ + *rp_locks = ERTS_PROC_LOCKS_ALL; + set_proc_exiting(rp, + state, + (is_immed(rsn) + ? rsn + : copy_object(rsn, rp)), + NULL); } else { /* Process running... */ @@ -8498,9 +12239,9 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) ExitMonitorContext *pcontext = vpcontext; DistEntry *dep; ErtsMonitor *rmon; - Process *rp; - if (mon->type == MON_ORIGIN) { + switch (mon->type) { + case MON_ORIGIN: /* We are monitoring someone else, we need to demonitor that one.. */ if (is_atom(mon->pid)) { /* remote by name */ ASSERT(is_node_name_atom(mon->pid)); @@ -8526,9 +12267,10 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) erts_deref_dist_entry(dep); } } else { - ASSERT(is_pid(mon->pid)); - if (is_internal_pid(mon->pid)) { /* local by pid or name */ - rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK); + ASSERT(is_pid(mon->pid) || is_port(mon->pid)); + /* if is local by pid or name */ + if (is_internal_pid(mon->pid)) { + Process *rp = erts_pid2proc(NULL, 0, mon->pid, ERTS_PROC_LOCK_LINK); if (!rp) { goto done; } @@ -8538,7 +12280,17 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) goto done; } erts_destroy_monitor(rmon); - } else { /* remote by pid */ + } else if (is_internal_port(mon->pid)) { + /* Is a local port */ + Port *prt = erts_port_lookup_raw(mon->pid); + if (!prt) { + goto done; + } + erts_port_demonitor(pcontext->p, + ERTS_PORT_DEMONITOR_ORIGIN_ON_DEATHBED, + prt, mon->ref, NULL); + return; /* let erts_port_demonitor do the deletion */ + } else { /* remote by pid */ ASSERT(is_external_pid(mon->pid)); dep = external_pid_dist_entry(mon->pid); ASSERT(dep != NULL); @@ -8563,7 +12315,8 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) } } } - } else { /* type == MON_TARGET */ + break; + case MON_TARGET: ASSERT(mon->type == MON_TARGET); ASSERT(is_pid(mon->pid) || is_internal_port(mon->pid)); if (is_internal_port(mon->pid)) { @@ -8575,6 +12328,7 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) erts_port_release(prt); } else if (is_internal_pid(mon->pid)) {/* local by name or pid */ Eterm watched; + Process *rp; DeclareTmpHeapNoproc(lhp,3); ErtsProcLocks rp_locks = (ERTS_PROC_LOCK_LINK | ERTS_PROC_LOCKS_MSG_SEND); @@ -8622,6 +12376,12 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext) } } } + break; + case MON_TIME_OFFSET: + erts_demonitor_time_offset(mon->ref); + break; + default: + ERTS_INTERNAL_ERROR("Invalid monitor type"); } done: /* As the monitors are previously removed from the process, @@ -8651,6 +12411,7 @@ static void doit_exit_link(ErtsLink *lnk, void *vpcontext) DistEntry *dep; Process *rp; + switch(lnk->type) { case LINK_PID: if(is_internal_port(item)) { @@ -8698,7 +12459,11 @@ static void doit_exit_link(ErtsLink *lnk, void *vpcontext) if (xres >= 0 && IS_TRACED_FL(rp, F_TRACE_PROCS)) { /* We didn't exit the process and it is traced */ if (IS_TRACED_FL(rp, F_TRACE_PROCS)) { - trace_proc(p, rp, am_getting_unlinked, p->common.id); + if (rp_locks & ERTS_PROC_LOCKS_XSIG_SEND) { + erts_smp_proc_unlock(rp, ERTS_PROC_LOCKS_XSIG_SEND); + rp_locks &= ~ERTS_PROC_LOCKS_XSIG_SEND; + } + trace_proc(NULL, 0, rp, am_getting_unlinked, p->common.id); } } } @@ -8741,7 +12506,7 @@ static void doit_exit_link(ErtsLink *lnk, void *vpcontext) break; default: - erl_exit(1, "bad type in link list\n"); + erts_exit(ERTS_ERROR_EXIT, "bad type in link list\n"); break; } erts_destroy_link(lnk); @@ -8753,8 +12518,9 @@ resume_suspend_monitor(ErtsSuspendMonitor *smon, void *vc_p) Process *suspendee = erts_pid2proc((Process *) vc_p, ERTS_PROC_LOCK_MAIN, smon->pid, ERTS_PROC_LOCK_STATUS); if (suspendee) { + ASSERT(suspendee != vc_p); if (smon->active) - resume_process(suspendee); + resume_process(suspendee, ERTS_PROC_LOCK_STATUS); erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS); } erts_destroy_suspend_monitor(smon); @@ -8765,11 +12531,9 @@ resume_suspend_monitor(ErtsSuspendMonitor *smon, void *vc_p) void erts_do_exit_process(Process* p, Eterm reason) { -#ifdef ERTS_SMP - erts_aint32_t state; -#endif p->arity = 0; /* No live registers */ p->fvalue = reason; + #ifdef USE_VM_PROBES if (DTRACE_ENABLED(process_exit)) { @@ -8782,6 +12546,10 @@ erts_do_exit_process(Process* p, Eterm reason) } #endif + if (p->static_flags & ERTS_STC_FLG_SYSTEM_PROC) + erts_exit(ERTS_DUMP_EXIT, "System process %T terminated: %T\n", + p->common.id, reason); + #ifdef ERTS_SMP ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p); /* By locking all locks (main lock is already locked) when going @@ -8792,10 +12560,9 @@ erts_do_exit_process(Process* p, Eterm reason) #endif #ifndef ERTS_SMP - set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state)); + set_proc_self_exiting(p); #else - state = set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state)); - if (state & ERTS_PSFLG_PENDING_EXIT) { + if (ERTS_PSFLG_PENDING_EXIT & set_proc_self_exiting(p)) { /* Process exited before pending exit was received... */ p->pending_exit.reason = THE_NON_VALUE; if (p->pending_exit.bp) { @@ -8813,8 +12580,6 @@ erts_do_exit_process(Process* p, Eterm reason) if (IS_TRACED_FL(p, F_TRACE_CALLS)) erts_schedule_time_break(p, ERTS_BP_CALL_TIME_SCHEDULE_EXITING); - if (IS_TRACED_FL(p,F_TRACE_PROCS)) - trace_proc(p, p, am_exit, reason); } erts_trace_check_exiting(p->common.id); @@ -8822,20 +12587,24 @@ erts_do_exit_process(Process* p, Eterm reason) ASSERT((ERTS_TRACE_FLAGS(p) & F_INITIAL_TRACE_FLAGS) == F_INITIAL_TRACE_FLAGS); - cancel_timer(p); /* Always cancel timer just in case */ - - if (p->u.bif_timers) - erts_cancel_bif_timers(p, ERTS_PROC_LOCKS_ALL); + ASSERT(erts_proc_read_refc(p) > 0); + if (ERTS_PTMR_IS_SET(p)) { + erts_cancel_proc_timer(p); + ASSERT(erts_proc_read_refc(p) > 0); + } erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL_MINOR); + if (IS_TRACED_FL(p,F_TRACE_PROCS)) + trace_proc(p, ERTS_PROC_LOCK_MAIN, p, am_exit, reason); + + /* - * The p->u.bif_timers of this process can *not* be used anymore; + * p->u.initial of this process can *not* be used anymore; * will be overwritten by misc termination data. */ p->u.terminate = NULL; - erts_continue_exit_process(p); } @@ -8847,8 +12616,8 @@ erts_continue_exit_process(Process *p) ErtsProcLocks curr_locks = ERTS_PROC_LOCK_MAIN; Eterm reason = p->fvalue; DistEntry *dep; - struct saved_calls *scb; - process_breakpoint_time_t *pbt; + erts_aint32_t state; + int delay_del_proc = 0; #ifdef DEBUG int yield_allowed = 1; @@ -8858,22 +12627,70 @@ erts_continue_exit_process(Process *p) ASSERT(ERTS_PROC_IS_EXITING(p)); + ASSERT(erts_proc_read_refc(p) > 0); + if (p->bif_timers) { + if (erts_cancel_bif_timers(p, p->bif_timers, &p->u.terminate)) { + ASSERT(erts_proc_read_refc(p) > 0); + goto yield; + } + ASSERT(erts_proc_read_refc(p) > 0); + p->bif_timers = NULL; + } + +#ifdef ERTS_BTM_ACCESSOR_SUPPORT + if (p->accessor_bif_timers) { + if (erts_detach_accessor_bif_timers(p, + p->accessor_bif_timers, + &p->u.terminate)) { + ASSERT(erts_proc_read_refc(p) > 0); + goto yield; + } + ASSERT(erts_proc_read_refc(p) > 0); + p->accessor_bif_timers = NULL; + } +#endif + #ifdef ERTS_SMP + if (p->flags & F_SCHDLR_ONLN_WAITQ) + abort_sched_onln_chng_waitq(p); + if (p->flags & F_HAVE_BLCKD_MSCHED) { ErtsSchedSuspendResult ssr; - ssr = erts_block_multi_scheduling(p, ERTS_PROC_LOCK_MAIN, 0, 1); + ssr = erts_block_multi_scheduling(p, ERTS_PROC_LOCK_MAIN, 0, 0, 1); + switch (ssr) { + case ERTS_SCHDLR_SSPND_YIELD_RESTART: + goto yield; + case ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_DONE_NMSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_YIELD_DONE_MSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_YIELD_DONE_NMSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_DONE: + case ERTS_SCHDLR_SSPND_YIELD_DONE: + p->flags &= ~F_HAVE_BLCKD_MSCHED; + break; + case ERTS_SCHDLR_SSPND_EINVAL: + default: + erts_exit(ERTS_ABORT_EXIT, "%s:%d: Internal error: %d\n", + __FILE__, __LINE__, (int) ssr); + } + } + if (p->flags & F_HAVE_BLCKD_NMSCHED) { + ErtsSchedSuspendResult ssr; + ssr = erts_block_multi_scheduling(p, ERTS_PROC_LOCK_MAIN, 0, 1, 1); switch (ssr) { case ERTS_SCHDLR_SSPND_YIELD_RESTART: goto yield; case ERTS_SCHDLR_SSPND_DONE_MSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_DONE_NMSCHED_BLOCKED: case ERTS_SCHDLR_SSPND_YIELD_DONE_MSCHED_BLOCKED: + case ERTS_SCHDLR_SSPND_YIELD_DONE_NMSCHED_BLOCKED: case ERTS_SCHDLR_SSPND_DONE: case ERTS_SCHDLR_SSPND_YIELD_DONE: p->flags &= ~F_HAVE_BLCKD_MSCHED; break; case ERTS_SCHDLR_SSPND_EINVAL: default: - erl_exit(ERTS_ABORT_EXIT, "%s:%d: Internal error: %d\n", + erts_exit(ERTS_ABORT_EXIT, "%s:%d: Internal error: %d\n", __FILE__, __LINE__, (int) ssr); } } @@ -8885,6 +12702,13 @@ erts_continue_exit_process(Process *p) p->flags &= ~F_USING_DB; } + erts_set_gc_state(p, 1); + state = erts_smp_atomic32_read_acqb(&p->state); + if (state & ERTS_PSFLG_ACTIVE_SYS) { + if (cleanup_sys_tasks(p, state, CONTEXT_REDS) >= CONTEXT_REDS/2) + goto yield; + } + if (p->flags & F_USING_DDLL) { erts_ddll_proc_dead(p, ERTS_PROC_LOCK_MAIN); p->flags &= ~F_USING_DDLL; @@ -8912,6 +12736,9 @@ erts_continue_exit_process(Process *p) ASSERT(!p->common.u.alive.reg); } + if (IS_TRACED_FL(p, F_TRACE_SCHED_EXIT)) + trace_sched(p, curr_locks, am_out_exited); + erts_smp_proc_lock(p, ERTS_PROC_LOCKS_ALL_MINOR); curr_locks = ERTS_PROC_LOCKS_ALL; @@ -8933,7 +12760,7 @@ erts_continue_exit_process(Process *p) { /* Do *not* use erts_get_runq_proc() */ ErtsRunQueue *rq; - rq = erts_get_runq_current(ERTS_GET_SCHEDULER_DATA_FROM_PROC(p)); + rq = erts_get_runq_current(erts_proc_sched_data(p)); erts_smp_runq_lock(rq); @@ -8944,6 +12771,8 @@ erts_continue_exit_process(Process *p) p->scheduler_data->current_process = NULL; p->scheduler_data->free_process = p; +#else + erts_proc_inc_refc(p); /* Decremented in schedule() */ #endif /* Time of death! */ @@ -8962,22 +12791,39 @@ erts_continue_exit_process(Process *p) { /* Inactivate and notify free */ erts_aint32_t n, e, a = erts_smp_atomic32_read_nob(&p->state); + int refc_inced = 0; while (1) { n = e = a; ASSERT(a & ERTS_PSFLG_EXITING); n |= ERTS_PSFLG_FREE; n &= ~ERTS_PSFLG_ACTIVE; + if ((n & ERTS_PSFLG_IN_RUNQ) && !refc_inced) { + erts_proc_inc_refc(p); + refc_inced = 1; + } a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e); if (a == e) break; } - } - dep = ((p->flags & F_DISTRIBUTION) - ? ERTS_PROC_SET_DIST_ENTRY(p, ERTS_PROC_LOCKS_ALL, NULL) - : NULL); - scb = ERTS_PROC_SET_SAVED_CALLS_BUF(p, ERTS_PROC_LOCKS_ALL, NULL); - pbt = ERTS_PROC_SET_CALL_TIME(p, ERTS_PROC_LOCKS_ALL, NULL); +#ifdef ERTS_DIRTY_SCHEDULERS + if (a & (ERTS_PSFLG_DIRTY_RUNNING + | ERTS_PSFLG_DIRTY_RUNNING_SYS)) { + p->flags |= F_DELAYED_DEL_PROC; + delay_del_proc = 1; + /* + * The dirty scheduler will also decrease + * refc when done... + */ + erts_proc_inc_refc(p); + } +#endif + + if (refc_inced && !(n & ERTS_PSFLG_IN_RUNQ)) + erts_proc_dec_refc(p); + } + + dep = (p->flags & F_DISTRIBUTION) ? erts_this_dist_entry : NULL; erts_smp_proc_unlock(p, ERTS_PROC_LOCKS_ALL); #ifdef BM_COUNTERS @@ -8986,8 +12832,6 @@ erts_continue_exit_process(Process *p) if (dep) { erts_do_net_exits(dep, reason); - if(dep) - erts_deref_dist_entry(dep); } /* @@ -9019,19 +12863,14 @@ erts_continue_exit_process(Process *p) have none here */ } - if (scb) - erts_free(ERTS_ALC_T_CALLS_BUF, (void *) scb); - - if (pbt) - erts_free(ERTS_ALC_T_BPD, (void *) pbt); +#ifdef ERTS_SMP + erts_flush_trace_messages(p, 0); +#endif - if (p->extra_root != NULL) { - (p->extra_root->cleanup)(p->extra_root); /* Should deallocate - whole structure */ - p->extra_root = NULL; - } + ERTS_TRACER_CLEAR(&ERTS_TRACER(p)); - delete_process(p); + if (!delay_del_proc) + delete_process(p); #ifdef ERTS_SMP erts_smp_proc_lock(p, ERTS_PROC_LOCK_MAIN); @@ -9061,64 +12900,7 @@ erts_continue_exit_process(Process *p) ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN == erts_proc_lc_my_proc_locks(p)); -} - -/* Callback for process timeout */ -static void -timeout_proc(Process* p) -{ - erts_aint32_t state; - BeamInstr** pi = (BeamInstr **) p->def_arg_reg; - p->i = *pi; - p->flags |= F_TIMO; - p->flags &= ~F_INSLPQUEUE; - - state = erts_smp_atomic32_read_acqb(&p->state); - if (!(state & ERTS_PSFLG_ACTIVE)) - schedule_process(p, state, 0); -} - - -void -cancel_timer(Process* p) -{ - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN & erts_proc_lc_my_proc_locks(p)); - p->flags &= ~(F_INSLPQUEUE|F_TIMO); -#ifdef ERTS_SMP - erts_cancel_smp_ptimer(p->common.u.alive.ptimer); -#else - erts_cancel_timer(&p->common.u.alive.tm); -#endif -} - -/* - * Insert a process into the time queue, with a timeout 'timeout' in ms. - */ -void -set_timer(Process* p, Uint timeout) -{ - ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN & erts_proc_lc_my_proc_locks(p)); - - /* check for special case timeout=0 DONT ADD TO time queue */ - if (timeout == 0) { - p->flags |= F_TIMO; - return; - } - p->flags |= F_INSLPQUEUE; - p->flags &= ~F_TIMO; - -#ifdef ERTS_SMP - erts_create_smp_ptimer(&p->common.u.alive.ptimer, - p->common.id, - (ErlTimeoutProc) timeout_proc, - timeout); -#else - erts_set_timer(&p->common.u.alive.tm, - (ErlTimeoutProc) timeout_proc, - NULL, - (void*) p, - timeout); -#endif + BUMP_ALL_REDS(p); } /* @@ -9136,7 +12918,7 @@ erts_stack_dump(int to, void *to_arg, Process *p) } erts_program_counter_info(to, to_arg, p); for (sp = p->stop; sp < STACK_START(p); sp++) { - yreg = stack_element_dump(to, to_arg, p, sp, yreg); + yreg = stack_element_dump(to, to_arg, sp, yreg); } } @@ -9153,7 +12935,9 @@ erts_program_counter_info(int to, void *to_arg, Process *p) print_function_from_pc(to, to_arg, p->cp); erts_print(to, to_arg, ")\n"); state = erts_smp_atomic32_read_acqb(&p->state); - if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_GC))) { + if (!(state & (ERTS_PSFLG_RUNNING + | ERTS_PSFLG_RUNNING_SYS + | ERTS_PSFLG_GC))) { erts_print(to, to_arg, "arity = %d\n",p->arity); if (!ERTS_IS_CRASH_DUMPING) { /* @@ -9191,7 +12975,7 @@ print_function_from_pc(int to, void *to_arg, BeamInstr* x) } static int -stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp, int yreg) +stack_element_dump(int to, void *to_arg, Eterm* sp, int yreg) { Eterm x = *sp; @@ -9205,7 +12989,7 @@ stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp, int yreg) } if (is_CP(x)) { - erts_print(to, to_arg, "Return addr %p (", (Eterm *) EXPAND_POINTER(x)); + erts_print(to, to_arg, "Return addr %p (", (Eterm *) x); print_function_from_pc(to, to_arg, cp_val(x)); erts_print(to, to_arg, ")\n"); yreg = 0; @@ -9220,6 +13004,188 @@ stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp, int yreg) } /* + * Print scheduler information + */ +void +erts_print_scheduler_info(int to, void *to_arg, ErtsSchedulerData *esdp) { + int i; + erts_aint32_t flg; + Process *p; + + erts_print(to, to_arg, "=scheduler:%u\n", esdp->no); + +#ifdef ERTS_SMP + flg = erts_smp_atomic32_read_dirty(&esdp->ssi->flags); + erts_print(to, to_arg, "Scheduler Sleep Info Flags: "); + for (i = 0; i < ERTS_SSI_FLGS_MAX && flg; i++) { + erts_aint32_t chk = (1 << i); + if (flg & chk) { + switch (chk) { + case ERTS_SSI_FLG_SLEEPING: + erts_print(to, to_arg, "SLEEPING"); break; + case ERTS_SSI_FLG_POLL_SLEEPING: + erts_print(to, to_arg, "POLL_SLEEPING"); break; + case ERTS_SSI_FLG_TSE_SLEEPING: + erts_print(to, to_arg, "TSE_SLEEPING"); break; + case ERTS_SSI_FLG_WAITING: + erts_print(to, to_arg, "WAITING"); break; + case ERTS_SSI_FLG_SUSPENDED: + erts_print(to, to_arg, "SUSPENDED"); break; + default: + erts_print(to, to_arg, "UNKNOWN(%d)", flg); break; + } + if (flg > chk) + erts_print(to, to_arg, " | "); + flg -= chk; + } + } + erts_print(to, to_arg, "\n"); +#endif + + flg = erts_atomic32_read_dirty(&esdp->ssi->aux_work); + erts_print(to, to_arg, "Scheduler Sleep Info Aux Work: "); + for (i = 0; i < ERTS_SSI_AUX_WORK_NO_FLAGS && flg; i++) { + erts_aint32_t chk = (1 << i); + if (flg & chk) { + if (erts_aux_work_flag_descr[i]) + erts_print(to, to_arg, "%s", erts_aux_work_flag_descr[i]); + else + erts_print(to, to_arg, "1<<%d", i); + if (flg > chk) + erts_print(to, to_arg, " | "); + flg -= chk; + } + } + erts_print(to, to_arg, "\n"); + + erts_print(to, to_arg, "Current Port: "); + if (esdp->current_port) + erts_print(to, to_arg, "%T", esdp->current_port->common.id); + erts_print(to, to_arg, "\n"); + + for (i = 0; i < ERTS_NO_PROC_PRIO_LEVELS; i++) { + erts_print(to, to_arg, "Run Queue "); + switch (i) { + case PRIORITY_MAX: + erts_print(to, to_arg, "Max "); + break; + case PRIORITY_HIGH: + erts_print(to, to_arg, "High "); + break; + case PRIORITY_NORMAL: + erts_print(to, to_arg, "Normal "); + break; + case PRIORITY_LOW: + erts_print(to, to_arg, "Low "); + break; + default: + erts_print(to, to_arg, "Unknown "); + break; + } + erts_print(to, to_arg, "Length: %d\n", + erts_smp_atomic32_read_dirty(&esdp->run_queue->procs.prio_info[i].len)); + } + erts_print(to, to_arg, "Run Queue Port Length: %d\n", + erts_smp_atomic32_read_dirty(&esdp->run_queue->ports.info.len)); + + flg = erts_smp_atomic32_read_dirty(&esdp->run_queue->flags); + erts_print(to, to_arg, "Run Queue Flags: "); + for (i = 0; i < ERTS_RUNQ_FLG_MAX && flg; i++) { + erts_aint32_t chk = (1 << i); + if (flg & chk) { + switch (chk) { + case (1 << PRIORITY_MAX): + erts_print(to, to_arg, "NONEMPTY_MAX"); break; + case (1 << PRIORITY_HIGH): + erts_print(to, to_arg, "NONEMPTY_HIGH"); break; + case (1 << PRIORITY_NORMAL): + erts_print(to, to_arg, "NONEMPTY_NORMAL"); break; + case (1 << PRIORITY_LOW): + erts_print(to, to_arg, "NONEMPTY_LOW"); break; + case (1 << (PRIORITY_MAX + ERTS_RUNQ_FLGS_EMIGRATE_SHFT)): + erts_print(to, to_arg, "EMIGRATE_MAX"); break; + case (1 << (PRIORITY_HIGH + ERTS_RUNQ_FLGS_EMIGRATE_SHFT)): + erts_print(to, to_arg, "EMIGRATE_HIGH"); break; + case (1 << (PRIORITY_NORMAL + ERTS_RUNQ_FLGS_EMIGRATE_SHFT)): + erts_print(to, to_arg, "EMIGRATE_NORMAL"); break; + case (1 << (PRIORITY_LOW + ERTS_RUNQ_FLGS_EMIGRATE_SHFT)): + erts_print(to, to_arg, "EMIGRATE_LOW"); break; + case (1 << (PRIORITY_MAX + ERTS_RUNQ_FLGS_IMMIGRATE_SHFT)): + erts_print(to, to_arg, "IMMIGRATE_MAX"); break; + case (1 << (PRIORITY_HIGH + ERTS_RUNQ_FLGS_IMMIGRATE_SHFT)): + erts_print(to, to_arg, "IMMIGRATE_HIGH"); break; + case (1 << (PRIORITY_NORMAL + ERTS_RUNQ_FLGS_IMMIGRATE_SHFT)): + erts_print(to, to_arg, "IMMIGRATE_NORMAL"); break; + case (1 << (PRIORITY_LOW + ERTS_RUNQ_FLGS_IMMIGRATE_SHFT)): + erts_print(to, to_arg, "IMMIGRATE_LOW"); break; + case (1 << (PRIORITY_MAX + ERTS_RUNQ_FLGS_EVACUATE_SHFT)): + erts_print(to, to_arg, "EVACUATE_MAX"); break; + case (1 << (PRIORITY_HIGH + ERTS_RUNQ_FLGS_EVACUATE_SHFT)): + erts_print(to, to_arg, "EVACUATE_HIGH"); break; + case (1 << (PRIORITY_NORMAL + ERTS_RUNQ_FLGS_EVACUATE_SHFT)): + erts_print(to, to_arg, "EVACUATE_NORMAL"); break; + case (1 << (PRIORITY_LOW + ERTS_RUNQ_FLGS_EVACUATE_SHFT)): + erts_print(to, to_arg, "EVACUATE_LOW"); break; + case ERTS_RUNQ_FLG_OUT_OF_WORK: + erts_print(to, to_arg, "OUT_OF_WORK"); break; + case ERTS_RUNQ_FLG_HALFTIME_OUT_OF_WORK: + erts_print(to, to_arg, "HALFTIME_OUT_OF_WORK"); break; + case ERTS_RUNQ_FLG_SUSPENDED: + erts_print(to, to_arg, "SUSPENDED"); break; + case ERTS_RUNQ_FLG_CHK_CPU_BIND: + erts_print(to, to_arg, "CHK_CPU_BIND"); break; + case ERTS_RUNQ_FLG_INACTIVE: + erts_print(to, to_arg, "INACTIVE"); break; + case ERTS_RUNQ_FLG_NONEMPTY: + erts_print(to, to_arg, "NONEMPTY"); break; + case ERTS_RUNQ_FLG_PROTECTED: + erts_print(to, to_arg, "PROTECTED"); break; + default: + erts_print(to, to_arg, "UNKNOWN(%d)", flg); break; + } + if (flg > chk) + erts_print(to, to_arg, " | "); + flg -= chk; + } + } + erts_print(to, to_arg, "\n"); + + /* This *MUST* to be the last information in scheduler block */ + p = esdp->current_process; + erts_print(to, to_arg, "Current Process: "); + if (esdp->current_process && !(ERTS_TRACE_FLAGS(p) & F_SENSITIVE)) { + flg = erts_smp_atomic32_read_dirty(&p->state); + erts_print(to, to_arg, "%T\n", p->common.id); + + erts_print(to, to_arg, "Current Process State: "); + erts_dump_process_state(to, to_arg, flg); + + erts_print(to, to_arg, "Current Process Internal State: "); + erts_dump_extended_process_state(to, to_arg, flg); + + erts_print(to, to_arg, "Current Process Program counter: %p (", p->i); + print_function_from_pc(to, to_arg, p->i); + erts_print(to, to_arg, ")\n"); + erts_print(to, to_arg, "Current Process CP: %p (", p->cp); + print_function_from_pc(to, to_arg, p->cp); + erts_print(to, to_arg, ")\n"); + + /* Getting this stacktrace can segfault if we are very very + unlucky if called while a process is being garbage collected. + Therefore we only call this on other schedulers if we either + have protection against segfaults, or we know that the process + is not garbage collecting. It *should* always be safe to call + on a process owned by us, even if it is currently being garbage + collected. + */ + erts_print(to, to_arg, "Current Process Limited Stack Trace:\n"); + erts_limited_stack_trace(to, to_arg, p); + } else + erts_print(to, to_arg, "\n"); + +} + +/* * A nice system halt closing all open port goes as follows: * 1) This function schedules the aux work ERTS_SSI_AUX_WORK_REAP_PORTS * on all schedulers, then schedules itself out. @@ -9233,14 +13199,18 @@ stack_element_dump(int to, void *to_arg, Process* p, Eterm* sp, int yreg) * The same global atomic is used as refcount. * * A BIF that calls this should make sure to schedule out to never come back: - * erl_halt((int)(- code)); + * erts_halt(code); * ERTS_BIF_YIELD1(bif_export[BIF_erlang_halt_1], BIF_P, NIL); */ -void erl_halt(int code) +void erts_halt(int code) { if (-1 == erts_smp_atomic32_cmpxchg_acqb(&erts_halt_progress, erts_no_schedulers, -1)) { +#ifdef ERTS_DIRTY_SCHEDULERS + ERTS_DIRTY_CPU_RUNQ->halt_in_progress = 1; + ERTS_DIRTY_IO_RUNQ->halt_in_progress = 1; +#endif erts_halt_code = code; notify_reap_ports_relb(); } @@ -9250,11 +13220,13 @@ void erl_halt(int code) int erts_dbg_check_halloc_lock(Process *p) { + ErtsSchedulerData *esdp; if (ERTS_PROC_LOCK_MAIN & erts_proc_lc_my_proc_locks(p)) return 1; if (p->common.id == ERTS_INVALID_PID) return 1; - if (p->scheduler_data && p == p->scheduler_data->match_pseudo_process) + esdp = erts_proc_sched_data(p); + if (esdp && p == esdp->match_pseudo_process) return 1; if (erts_thr_progress_is_blocking()) return 1; |