diff options
Diffstat (limited to 'erts/emulator')
| -rw-r--r-- | erts/emulator/beam/erl_process.c | 191 |
1 files changed, 95 insertions, 96 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c index 2a34410d5b..624b907fb6 100644 --- a/erts/emulator/beam/erl_process.c +++ b/erts/emulator/beam/erl_process.c @@ -7024,18 +7024,24 @@ sched_spin_suspended(ErtsSchedulerSleepInfo *ssi, int spincount) } static erts_aint32_t -sched_set_suspended_sleeptype(ErtsSchedulerSleepInfo *ssi) +sched_set_suspended_sleeptype(ErtsSchedulerSleepInfo *ssi, + erts_aint32_t sleep_type) { erts_aint32_t oflgs; - erts_aint32_t nflgs = (ERTS_SSI_FLG_SLEEPING - | ERTS_SSI_FLG_TSE_SLEEPING - | ERTS_SSI_FLG_WAITING - | ERTS_SSI_FLG_SUSPENDED); + erts_aint32_t nflgs = ((ERTS_SSI_FLG_SLEEPING + | ERTS_SSI_FLG_WAITING + | ERTS_SSI_FLG_SUSPENDED) + | sleep_type); erts_aint32_t xflgs = (ERTS_SSI_FLG_SLEEPING | ERTS_SSI_FLG_WAITING | ERTS_SSI_FLG_SUSPENDED); - erts_tse_reset(ssi->event); + if (sleep_type == ERTS_SSI_FLG_TSE_SLEEPING) + erts_tse_reset(ssi->event); + else { + ASSERT(sleep_type == ERTS_SSI_FLG_POLL_SLEEPING); + erts_check_io_interrupt(ssi->esdp->pollset, 0); + } while (1) { oflgs = erts_atomic32_cmpxchg_acqb(&ssi->flags, nflgs, xflgs); @@ -7371,6 +7377,61 @@ msb_scheduler_type_switch(ErtsSchedType sched_type, } +static ERTS_INLINE void +suspend_dirty_scheduler_sleep(ErtsSchedulerData *esdp) +{ + ErtsSchedulerSleepInfo *ssi = esdp->ssi; + erts_aint32_t 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, ERTS_SSI_FLG_TSE_SLEEPING); + 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); + } + } +} + +static ERTS_INLINE void +suspend_normal_scheduler_sleep(ErtsSchedulerData *esdp) +{ + ErtsSchedulerSleepInfo *ssi = esdp->ssi; + erts_aint32_t flgs; + int spincount; + + spincount = sched_busy_wait.sys_schedule; + + while (spincount-- > 0) { + + erl_sys_schedule(1); + + flgs = erts_smp_atomic32_read_acqb(&ssi->flags); + if (flgs != (ERTS_SSI_FLG_SLEEPING + | ERTS_SSI_FLG_WAITING + | ERTS_SSI_FLG_SUSPENDED)) { + return; + } + } + + flgs = sched_set_suspended_sleeptype(ssi, ERTS_SSI_FLG_POLL_SLEEPING); + if (flgs != (ERTS_SSI_FLG_SLEEPING + | ERTS_SSI_FLG_POLL_SLEEPING + | ERTS_SSI_FLG_WAITING + | ERTS_SSI_FLG_SUSPENDED)) { + return; + } + + /* Sleep on pollset... */ + erl_sys_schedule(0); +} static void suspend_scheduler(ErtsSchedulerData *esdp) @@ -7559,14 +7620,15 @@ suspend_scheduler(ErtsSchedulerData *esdp) schdlr_sspnd_resume_procs(sched_type, &resume); while (1) { - ErtsMonotonicTime current_time; - erts_aint32_t flgs; - if (sched_type != ERTS_SCHED_NORMAL) - aux_work = 0; - else { + suspend_dirty_scheduler_sleep(esdp); + else + { + ErtsMonotonicTime current_time, timeout_time; int evacuate = no == 1 ? 0 : !ERTS_EMPTY_RUNQ(esdp->run_queue); + ASSERT(sched_type == ERTS_SCHED_NORMAL); + aux_work = erts_atomic32_read_acqb(&ssi->aux_work); if (aux_work|evacuate) { @@ -7588,95 +7650,32 @@ suspend_scheduler(ErtsSchedulerData *esdp) } } - } - 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); - } - } - else { - ErtsMonotonicTime timeout_time; - int do_timeout; + if (aux_work) + timeout_time = erts_next_timeout_time(esdp->next_tmo_ref); + else + timeout_time = erts_check_next_timeout_time(esdp); - 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; - } + current_time = erts_get_monotonic_time(esdp); - 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_WAITING - | ERTS_SSI_FLG_SUSPENDED)) { - 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 (!aux_work && current_time < timeout_time) { + /* go to sleep... */ + if (thr_prgr_active) { + erts_thr_progress_active(esdp, thr_prgr_active = 0); + sched_wall_time_change(esdp, 0); + } + suspend_normal_scheduler_sleep(esdp); + current_time = erts_get_monotonic_time(esdp);; + } - if (current_time >= timeout_time) { - ASSERT(sched_type == ERTS_SCHED_NORMAL); - erts_bump_timers(esdp->timer_wheel, current_time); - } - } + if (current_time >= timeout_time) { + 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); + } + } flgs = sched_prep_spin_suspended(ssi, (ERTS_SSI_FLG_WAITING | ERTS_SSI_FLG_SUSPENDED)); |