From fe1c0d26d4e6180b79fc8497b827ac2ef1f471d5 Mon Sep 17 00:00:00 2001 From: Rickard Green Date: Fri, 5 Jun 2015 17:25:22 +0200 Subject: Delayed node table GC --- erts/emulator/beam/dist.c | 2 +- erts/emulator/beam/erl_bif_info.c | 20 +++ erts/emulator/beam/erl_init.c | 36 ++++- erts/emulator/beam/erl_node_tables.c | 202 +++++++++++++++++++++++----- erts/emulator/beam/erl_node_tables.h | 16 ++- erts/emulator/test/node_container_SUITE.erl | 47 ++++--- 6 files changed, 264 insertions(+), 59 deletions(-) (limited to 'erts/emulator') diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c index 142fcb3c00..cfdede793c 100644 --- a/erts/emulator/beam/dist.c +++ b/erts/emulator/beam/dist.c @@ -2522,7 +2522,7 @@ info_dist_entry(int to, void *arg, DistEntry *dep, int visible, int connected) erts_print(to, arg, "Name: %T", dep->sysname); #ifdef DEBUG - erts_print(to, arg, " (refc=%d)", erts_refc_read(&dep->refc, 1)); + erts_print(to, arg, " (refc=%d)", erts_refc_read(&dep->refc, 0)); #endif erts_print(to, arg, "\n"); if (!connected && is_nil(dep->cid)) { diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c index ae8a5c266a..23fc4f915e 100644 --- a/erts/emulator/beam/erl_bif_info.c +++ b/erts/emulator/beam/erl_bif_info.c @@ -2687,6 +2687,15 @@ BIF_RETTYPE system_info_1(BIF_ALIST_1) hp = hsz ? HAlloc(BIF_P, hsz) : NULL; res = erts_bld_uint(&hp, NULL, erts_dist_buf_busy_limit); BIF_RET(res); + } else if (ERTS_IS_ATOM_STR("delayed_node_table_gc", BIF_ARG_1)) { + Uint hsz = 0; + Uint dntgc = erts_delayed_node_table_gc(); + if (dntgc == ERTS_NODE_TAB_DELAY_GC_INFINITY) + BIF_RET(am_infinity); + (void) erts_bld_uint(NULL, &hsz, dntgc); + hp = hsz ? HAlloc(BIF_P, hsz) : NULL; + res = erts_bld_uint(&hp, NULL, dntgc); + BIF_RET(res); } else if (ERTS_IS_ATOM_STR("ethread_info", BIF_ARG_1)) { BIF_RET(erts_get_ethread_info(BIF_P)); } @@ -4069,6 +4078,17 @@ BIF_RETTYPE erts_debug_set_internal_state_2(BIF_ALIST_2) int res = erts_debug_set_unique_monotonic_integer_state(BIF_ARG_2); BIF_RET(res ? am_true : am_false); } + else if (ERTS_IS_ATOM_STR("node_tab_delayed_delete", BIF_ARG_1)) { + /* node_container_SUITE */ + Sint64 msecs; + if (term_to_Sint64(BIF_ARG_2, &msecs)) { + /* Negative value restore original value... */ + erts_smp_proc_unlock(BIF_P, ERTS_PROC_LOCK_MAIN); + erts_debug_test_node_tab_delayed_delete(msecs); + erts_smp_proc_lock(BIF_P, ERTS_PROC_LOCK_MAIN); + BIF_RET(am_ok); + } + } } BIF_ERROR(BIF_P, BADARG); diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c index 988ff0e2b5..a2d2a3befc 100644 --- a/erts/emulator/beam/erl_init.c +++ b/erts/emulator/beam/erl_init.c @@ -141,7 +141,8 @@ static void erl_init(int ncpu, int port_tab_sz_ignore_files, int legacy_port_tab, int time_correction, - ErtsTimeWarpMode time_warp_mode); + ErtsTimeWarpMode time_warp_mode, + int node_tab_delete_delay); static erts_atomic_t exiting; @@ -314,7 +315,8 @@ erts_short_init(void) 0, 0, time_correction, - time_warp_mode); + time_warp_mode, + ERTS_NODE_TAB_DELAY_GC_DEFAULT); erts_initialized = 1; } @@ -326,7 +328,8 @@ erl_init(int ncpu, int port_tab_sz_ignore_files, int legacy_port_tab, int time_correction, - ErtsTimeWarpMode time_warp_mode) + ErtsTimeWarpMode time_warp_mode, + int node_tab_delete_delay) { init_benchmarking(); @@ -367,7 +370,7 @@ erl_init(int ncpu, erts_init_binary(); /* Must be after init_emulator() */ erts_bp_init(); init_db(); /* Must be after init_emulator */ - erts_init_node_tables(); + erts_init_node_tables(node_tab_delete_delay); init_dist(); erl_drv_thr_init(); erts_init_async(); @@ -629,6 +632,9 @@ void erts_usage(void) erts_fprintf(stderr, " see error_logger documentation for details\n"); erts_fprintf(stderr, "-zdbbl size set the distribution buffer busy limit in kilobytes\n"); erts_fprintf(stderr, " valid range is [1-%d]\n", INT_MAX/1024); + erts_fprintf(stderr, "-zdntgc time set delayed node table gc in seconds\n"); + erts_fprintf(stderr, " valid values are infinity or intergers in the range [0-%d]\n", + ERTS_NODE_TAB_DELAY_GC_MAX); erts_fprintf(stderr, "\n"); erts_fprintf(stderr, "Note that if the emulator is started with erlexec (typically\n"); erts_fprintf(stderr, "from the erl script), these flags should be specified with +.\n"); @@ -1219,6 +1225,7 @@ erl_start(int argc, char **argv) int legacy_port_tab = 0; int time_correction; ErtsTimeWarpMode time_warp_mode; + int node_tab_delete_delay = ERTS_NODE_TAB_DELAY_GC_DEFAULT; set_default_time_adj(&time_correction, &time_warp_mode); @@ -2004,9 +2011,9 @@ erl_start(int argc, char **argv) case 'z': { char *sub_param = argv[i]+2; - int new_limit; if (has_prefix("dbbl", sub_param)) { + int new_limit; arg = get_arg(sub_param+4, argv[i+1], &i); new_limit = atoi(arg); if (new_limit < 1 || INT_MAX/1024 < new_limit) { @@ -2015,6 +2022,22 @@ erl_start(int argc, char **argv) } else { erts_dist_buf_busy_limit = new_limit*1024; } + } + else if (has_prefix("dntgc", sub_param)) { + long secs; + + arg = get_arg(sub_param+5, argv[i+1], &i); + if (sys_strcmp(arg, "infinity") == 0) + secs = ERTS_NODE_TAB_DELAY_GC_INFINITY; + else { + errno = 0; + secs = strtol(arg, NULL, 10); + if (errno != 0 || secs < 0 || ERTS_NODE_TAB_DELAY_GC_MAX < secs) { + erts_fprintf(stderr, "Invalid delayed node table gc: %ld\n", secs); + erts_usage(); + } + } + node_tab_delete_delay = (int) secs; } else { erts_fprintf(stderr, "bad -z option %s\n", argv[i]); erts_usage(); @@ -2088,7 +2111,8 @@ erl_start(int argc, char **argv) port_tab_sz_ignore_files, legacy_port_tab, time_correction, - time_warp_mode); + time_warp_mode, + node_tab_delete_delay); load_preloaded(); erts_end_staging_code_ix(); diff --git a/erts/emulator/beam/erl_node_tables.c b/erts/emulator/beam/erl_node_tables.c index 900fdb3ab5..c2acaea0bc 100644 --- a/erts/emulator/beam/erl_node_tables.c +++ b/erts/emulator/beam/erl_node_tables.c @@ -51,6 +51,9 @@ static Uint dist_entries; static int references_atoms_need_init = 1; +static ErtsMonotonicTime orig_node_tab_delete_delay; +static ErtsMonotonicTime node_tab_delete_delay; + /* -- The distribution table ---------------------------------------------- */ #ifdef DEBUG @@ -290,21 +293,46 @@ DistEntry *erts_find_dist_entry(Eterm sysname) return res; } -void erts_delete_dist_entry(DistEntry *dep) +static void try_delete_dist_entry(void *vdep) +{ + DistEntry *dep = (DistEntry *) vdep; + erts_aint_t refc; + + erts_smp_rwmtx_rwlock(&erts_dist_table_rwmtx); + /* + * Another thread might have looked up this dist entry after + * we decided to delete it (refc became zero). If so, the other + * thread incremented refc twice. Once for the new reference + * and once for this thread. + * + * If refc reach -1, noone has used the entry since we + * set up the timer. Delete the entry. + * + * If refc reach 0, the entry is currently not in use + * but has been used since we set up the timer. Set up a + * new timer. + * + * If refc > 0, the entry is in use. Keep the entry. + */ + refc = erts_refc_dectest(&dep->refc, -1); + if (refc == -1) + (void) hash_erase(&erts_dist_table, (void *) dep); + erts_smp_rwmtx_rwunlock(&erts_dist_table_rwmtx); + + if (refc == 0) + erts_schedule_delete_dist_entry(dep); +} + +void erts_schedule_delete_dist_entry(DistEntry *dep) { ASSERT(dep != erts_this_dist_entry); - if(dep != erts_this_dist_entry) { - erts_smp_rwmtx_rwlock(&erts_dist_table_rwmtx); - /* - * Another thread might have looked up this dist entry after - * we decided to delete it (refc became zero). If so, the other - * thread incremented refc twice. Once for the new reference - * and once for this thread. Therefore, delete dist entry if - * refc is 0 or -1 after a decrement. - */ - if (erts_refc_dectest(&dep->refc, -1) <= 0) - (void) hash_erase(&erts_dist_table, (void *) dep); - erts_smp_rwmtx_rwunlock(&erts_dist_table_rwmtx); + if (dep != erts_this_dist_entry) { + if (node_tab_delete_delay == 0) + try_delete_dist_entry((void *) dep); + else if (node_tab_delete_delay > 0) + erts_start_timer_callback(node_tab_delete_delay, + try_delete_dist_entry, + (void *) dep); } } @@ -609,21 +637,46 @@ ErlNode *erts_find_or_insert_node(Eterm sysname, Uint creation) return res; } -void erts_delete_node(ErlNode *enp) +static void try_delete_node(void *venp) +{ + ErlNode *enp = (ErlNode *) venp; + erts_aint_t refc; + + erts_smp_rwmtx_rwlock(&erts_node_table_rwmtx); + /* + * Another thread might have looked up this node after we + * decided to delete it (refc became zero). If so, the other + * thread incremented refc twice. Once for the new reference + * and once for this thread. + * + * If refc reach -1, noone has used the entry since we + * set up the timer. Delete the entry. + * + * If refc reach 0, the entry is currently not in use + * but has been used since we set up the timer. Set up a + * new timer. + * + * If refc > 0, the entry is in use. Keep the entry. + */ + refc = erts_refc_dectest(&enp->refc, -1); + if (refc == -1) + (void) hash_erase(&erts_node_table, (void *) enp); + erts_smp_rwmtx_rwunlock(&erts_node_table_rwmtx); + + if (refc == 0) + erts_schedule_delete_node(enp); +} + +void erts_schedule_delete_node(ErlNode *enp) { ASSERT(enp != erts_this_node); - if(enp != erts_this_node) { - erts_smp_rwmtx_rwlock(&erts_node_table_rwmtx); - /* - * Another thread might have looked up this node after we - * decided to delete it (refc became zero). If so, the other - * thread incremented refc twice. Once for the new reference - * and once for this thread. Therefore, delete node if refc - * is 0 or -1 after a decrement. - */ - if (erts_refc_dectest(&enp->refc, -1) <= 0) - (void) hash_erase(&erts_node_table, (void *) enp); - erts_smp_rwmtx_rwunlock(&erts_node_table_rwmtx); + if (enp != erts_this_node) { + if (node_tab_delete_delay == 0) + try_delete_node((void *) enp); + else if (node_tab_delete_delay > 0) + erts_start_timer_callback(node_tab_delete_delay, + try_delete_node, + (void *) enp); } } @@ -651,7 +704,7 @@ static void print_node(void *venp, void *vpndp) erts_print(pndp->to, pndp->to_arg, " %d", enp->creation); #ifdef DEBUG erts_print(pndp->to, pndp->to_arg, " (refc=%ld)", - erts_refc_read(&enp->refc, 1)); + erts_refc_read(&enp->refc, 0)); #endif pndp->no_sysname++; } @@ -714,11 +767,28 @@ erts_set_this_node(Eterm sysname, Uint creation) } -void erts_init_node_tables(void) +Uint +erts_delayed_node_table_gc(void) +{ + if (node_tab_delete_delay < 0) + return (Uint) ERTS_NODE_TAB_DELAY_GC_INFINITY; + if (node_tab_delete_delay == 0) + return (Uint) 0; + return (Uint) ((node_tab_delete_delay-1)/1000 + 1); +} + +void erts_init_node_tables(int dd_sec) { erts_smp_rwmtx_opt_t rwmtx_opt = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER; HashFunctions f; + if (dd_sec == ERTS_NODE_TAB_DELAY_GC_INFINITY) + node_tab_delete_delay = (ErtsMonotonicTime) -1; + else + node_tab_delete_delay = ((ErtsMonotonicTime) dd_sec)*1000; + + orig_node_tab_delete_delay = node_tab_delete_delay; + rwmtx_opt.type = ERTS_SMP_RWMTX_TYPE_FREQUENT_READ; rwmtx_opt.lived = ERTS_SMP_RWMTX_LONG_LIVED; @@ -847,6 +917,7 @@ static Eterm AM_dist_references; static Eterm AM_node_references; static Eterm AM_system; static Eterm AM_timer; +static Eterm AM_delayed_delete_timer; static void setup_reference_table(void); static Eterm reference_table_term(Uint **hpp, Uint *szp); @@ -881,8 +952,10 @@ typedef struct dist_referrer_ { int heap_ref; int node_ref; int ctrl_ref; + int system_ref; Eterm id; Uint creation; + Uint id_heap[ID_HEAP_SIZE]; } DistReferrer; typedef struct { @@ -931,6 +1004,7 @@ erts_get_node_and_dist_references(struct process *proc) INIT_AM(node_references); INIT_AM(timer); INIT_AM(system); + INIT_AM(delayed_delete_timer); references_atoms_need_init = 0; } @@ -988,17 +1062,25 @@ insert_dist_referrer(ReferredDist *referred_dist, sizeof(DistReferrer)); drp->next = referred_dist->referrers; referred_dist->referrers = drp; - drp->id = id; + if(IS_CONST(id)) + drp->id = id; + else { + Uint *hp = &drp->id_heap[0]; + ASSERT(is_tuple(id)); + drp->id = copy_struct(id, size_object(id), &hp, NULL); + } drp->creation = creation; drp->heap_ref = 0; drp->node_ref = 0; drp->ctrl_ref = 0; + drp->system_ref = 0; } switch (type) { case NODE_REF: drp->node_ref++; break; case CTRL_REF: drp->ctrl_ref++; break; case HEAP_REF: drp->heap_ref++; break; + case SYSTEM_REF: drp->system_ref++; break; default: ASSERT(0); } } @@ -1260,6 +1342,33 @@ insert_sys_msg(Eterm from, Eterm to, Eterm msg, ErlHeapFragment *bp) } #endif +static void +insert_delayed_delete_node(void *state, + ErtsMonotonicTime timeout_pos, + void *vnp) +{ + DeclareTmpHeapNoproc(heap,3); + UseTmpHeapNoproc(3); + insert_node((ErlNode *) vnp, + SYSTEM_REF, + TUPLE2(&heap[0], AM_system, AM_delayed_delete_timer)); + UnUseTmpHeapNoproc(3); +} + +static void +insert_delayed_delete_dist_entry(void *state, + ErtsMonotonicTime timeout_pos, + void *vdep) +{ + DeclareTmpHeapNoproc(heap,3); + UseTmpHeapNoproc(3); + insert_dist_entry((DistEntry *) vdep, + SYSTEM_REF, + TUPLE2(&heap[0], AM_system, AM_delayed_delete_timer), + 0); + UnUseTmpHeapNoproc(3); +} + static void setup_reference_table(void) { @@ -1288,6 +1397,13 @@ setup_reference_table(void) /* Go through the hole system, and build a table of all references to ErlNode and DistEntry structures */ + erts_debug_callback_timer_foreach(try_delete_node, + insert_delayed_delete_node, + NULL); + erts_debug_callback_timer_foreach(try_delete_dist_entry, + insert_delayed_delete_dist_entry, + NULL); + UseTmpHeapNoproc(3); insert_node(erts_this_node, SYSTEM_REF, @@ -1601,7 +1717,7 @@ reference_table_term(Uint **hpp, Uint *szp) tup = MK_2TUP(referred_nodes[i].node->sysname, MK_UINT(referred_nodes[i].node->creation)); - tup = MK_3TUP(tup, MK_UINT(erts_refc_read(&referred_nodes[i].node->refc, 1)), nril); + tup = MK_3TUP(tup, MK_UINT(erts_refc_read(&referred_nodes[i].node->refc, 0)), nril); nl = MK_CONS(tup, nl); } @@ -1624,6 +1740,10 @@ reference_table_term(Uint **hpp, Uint *szp) tup = MK_2TUP(AM_heap, MK_UINT(drp->heap_ref)); drl = MK_CONS(tup, drl); } + if(drp->system_ref) { + tup = MK_2TUP(AM_system, MK_UINT(drp->system_ref)); + drl = MK_CONS(tup, drl); + } if (is_internal_pid(drp->id)) { ASSERT(!drp->node_ref); @@ -1633,6 +1753,14 @@ reference_table_term(Uint **hpp, Uint *szp) ASSERT(drp->ctrl_ref && !drp->node_ref); tup = MK_2TUP(AM_port, drp->id); } + else if (is_tuple(drp->id)) { + Eterm *t; + ASSERT(drp->system_ref && !drp->node_ref + && !drp->ctrl_ref && !drp->heap_ref); + t = tuple_val(drp->id); + ASSERT(2 == arityval(t[0])); + tup = MK_2TUP(t[1], t[2]); + } else { ASSERT(!drp->ctrl_ref && drp->node_ref); ASSERT(is_atom(drp->id)); @@ -1650,7 +1778,7 @@ reference_table_term(Uint **hpp, Uint *szp) /* DistList = [{Dist, Refc, ReferenceIdList}] */ tup = MK_3TUP(referred_dists[i].dist->sysname, - MK_UINT(erts_refc_read(&referred_dists[i].dist->refc, 1)), + MK_UINT(erts_refc_read(&referred_dists[i].dist->refc, 0)), dril); dl = MK_CONS(tup, dl); } @@ -1705,3 +1833,15 @@ delete_reference_table(void) } } +void +erts_debug_test_node_tab_delayed_delete(Sint64 millisecs) +{ + erts_smp_thr_progress_block(); + + if (millisecs < 0) + node_tab_delete_delay = orig_node_tab_delete_delay; + else + node_tab_delete_delay = millisecs; + + erts_smp_thr_progress_unblock(); +} diff --git a/erts/emulator/beam/erl_node_tables.h b/erts/emulator/beam/erl_node_tables.h index af60071ea5..54c5cd1d11 100644 --- a/erts/emulator/beam/erl_node_tables.h +++ b/erts/emulator/beam/erl_node_tables.h @@ -46,6 +46,10 @@ #define ERTS_PORT_TASK_ONLY_BASIC_TYPES__ #include "erl_port_task.h" #undef ERTS_PORT_TASK_ONLY_BASIC_TYPES__ + +#define ERTS_NODE_TAB_DELAY_GC_DEFAULT (60) +#define ERTS_NODE_TAB_DELAY_GC_MAX (100*1000*1000) +#define ERTS_NODE_TAB_DELAY_GC_INFINITY (ERTS_NODE_TAB_DELAY_GC_MAX+1) #define ERST_INTERNAL_CHANNEL_NO 0 @@ -166,20 +170,21 @@ extern DistEntry *erts_this_dist_entry; extern ErlNode *erts_this_node; extern char *erts_this_node_sysname; /* must match erl_node_tables.c */ +Uint erts_delayed_node_table_gc(void); DistEntry *erts_channel_no_to_dist_entry(Uint); DistEntry *erts_sysname_to_connected_dist_entry(Eterm); DistEntry *erts_find_or_insert_dist_entry(Eterm); DistEntry *erts_find_dist_entry(Eterm); -void erts_delete_dist_entry(DistEntry *); +void erts_schedule_delete_dist_entry(DistEntry *); Uint erts_dist_table_size(void); void erts_dist_table_info(int, void *); void erts_set_dist_entry_not_connected(DistEntry *); void erts_set_dist_entry_connected(DistEntry *, Eterm, Uint); ErlNode *erts_find_or_insert_node(Eterm, Uint); -void erts_delete_node(ErlNode *); +void erts_schedule_delete_node(ErlNode *); void erts_set_this_node(Eterm, Uint); Uint erts_node_table_size(void); -void erts_init_node_tables(void); +void erts_init_node_tables(int); void erts_node_table_info(int, void *); void erts_print_node_info(int, void *, Eterm, int*, int*); Eterm erts_get_node_and_dist_references(struct process *); @@ -204,7 +209,7 @@ erts_deref_dist_entry(DistEntry *dep) { ASSERT(dep); if (erts_refc_dectest(&dep->refc, 0) == 0) - erts_delete_dist_entry(dep); + erts_schedule_delete_dist_entry(dep); } ERTS_GLB_INLINE void @@ -212,7 +217,7 @@ erts_deref_node_entry(ErlNode *np) { ASSERT(np); if (erts_refc_dectest(&np->refc, 0) == 0) - erts_delete_node(np); + erts_schedule_delete_node(np); } ERTS_GLB_INLINE void @@ -253,5 +258,6 @@ erts_smp_de_links_unlock(DistEntry *dep) #endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */ +void erts_debug_test_node_tab_delayed_delete(Sint64 millisecs); #endif diff --git a/erts/emulator/test/node_container_SUITE.erl b/erts/emulator/test/node_container_SUITE.erl index 2f505893b4..479e6f200a 100644 --- a/erts/emulator/test/node_container_SUITE.erl +++ b/erts/emulator/test/node_container_SUITE.erl @@ -73,6 +73,8 @@ init_per_suite(Config) -> Config. end_per_suite(_Config) -> + erts_debug:set_internal_state(available_internal_state, true), + erts_debug:set_internal_state(node_tab_delayed_delete, -1), %% restore original value available_internal_state(false). init_per_group(_GroupName, Config) -> @@ -419,6 +421,8 @@ node_table_gc(doc) -> ["Tests that node tables are garbage collected."]; node_table_gc(suite) -> []; node_table_gc(Config) when is_list(Config) -> + erts_debug:set_internal_state(available_internal_state, true), + erts_debug:set_internal_state(node_tab_delayed_delete, 0), ?line PreKnown = nodes(known), ?line ?t:format("PreKnown = ~p~n", [PreKnown]), ?line make_node_garbage(0, 200000, 1000, []), @@ -428,6 +432,7 @@ node_table_gc(Config) when is_list(Config) -> ?line ?t:format("PostAreas = ~p~n", [PostAreas]), ?line true = length(PostKnown) =< length(PreKnown), ?line nc_refc_check(node()), + erts_debug:set_internal_state(node_tab_delayed_delete, -1), %% restore original value ?line ok. make_node_garbage(N, L, I, Ps) when N < L -> @@ -579,6 +584,8 @@ node_controller_refc(doc) -> "as they should for entities controlling a connections."]; node_controller_refc(suite) -> []; node_controller_refc(Config) when is_list(Config) -> + erts_debug:set_internal_state(available_internal_state, true), + erts_debug:set_internal_state(node_tab_delayed_delete, 0), ?line NodeFirstName = get_nodefirstname(), ?line ?line {ok, Node} = start_node(NodeFirstName), ?line true = lists:member(Node, nodes()), @@ -606,6 +613,7 @@ node_controller_refc(Config) when is_list(Config) -> ?line false = get_dist_references(Node), ?line false = lists:member(Node, nodes(known)), ?line nc_refc_check(node()), + erts_debug:set_internal_state(node_tab_delayed_delete, -1), %% restore original value ?line ok. %% @@ -686,9 +694,6 @@ timer_refc(doc) -> "as they should for data stored in bif timers."]; timer_refc(suite) -> []; timer_refc(Config) when is_list(Config) -> - {skipped, "Test needs to be UPDATED for new timer implementation"}. - -timer_refc_test(Config) when is_list(Config) -> ?line RNode = {get_nodename(), 1}, ?line RPid = mk_pid(RNode, 4711, 2), ?line RPort = mk_port(RNode, 4711), @@ -992,23 +997,32 @@ check_nd_refc({ThisNodeName, ThisCreation}, NodeRefs, DistRefs, Fail) -> check_refc(ThisNodeName,ThisCreation,Table,EntryList) when is_list(EntryList) -> lists:foreach( fun ({Entry, Refc, ReferrerList}) -> - FoundRefs = + {DelayedDeleteTimer, + FoundRefs} = lists:foldl( - fun ({_Referrer, ReferencesList}, A1) -> - A1 + lists:foldl(fun ({_T,Rs},A2) -> - A2+Rs - end, - 0, - ReferencesList) + fun ({Referrer, ReferencesList}, {DDT, A1}) -> + {case Referrer of + {system,delayed_delete_timer} -> + true; + _ -> + DDT + end, + A1 + lists:foldl(fun ({_T,Rs},A2) -> + A2+Rs + end, + 0, + ReferencesList)} end, - 0, + {false, 0}, ReferrerList), - %% Reference count equals found references ? - case Refc =:= FoundRefs of - true -> + %% Reference count equals found references? + case {Refc, FoundRefs, DelayedDeleteTimer} of + {X, X, _} -> + ok; + {0, 1, true} -> ok; - false -> + _ -> exit({invalid_reference_count, Table, Entry}) end, @@ -1016,7 +1030,8 @@ check_refc(ThisNodeName,ThisCreation,Table,EntryList) when is_list(EntryList) -> case {Entry, Refc} of {ThisNodeName, 0} -> ok; {{ThisNodeName, ThisCreation}, 0} -> ok; - {_, 0} -> exit({not_referred_entry_in_table, Table, Entry}); + {_, 0} when DelayedDeleteTimer == false -> + exit({not_referred_entry_in_table, Table, Entry}); {_, _} -> ok end -- cgit v1.2.3