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authorErlang/OTP <[email protected]>2013-04-18 13:06:51 +0200
committerBjörn Gustavsson <[email protected]>2013-04-18 13:10:03 +0200
commit966ca9d0dd541817f033d72b7163f64a98a81fe8 (patch)
treef5c78f8534dc98c844b3fc76ffbc214afa9b5324 /erts/emulator
parent0d9d402d50e803f1efdd1a1ce96fdbb78229c4a9 (diff)
parent3039afdb65d42ef2b300560cfafaa50ba5d4473f (diff)
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Merge branch 'rickard/sched/OTP-11022' into maint-r16
* rickard/sched/OTP-11022: Do not count offline run-queues as empty
Diffstat (limited to 'erts/emulator')
-rw-r--r--erts/emulator/beam/erl_process.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 7e0884f55f..f9ef4eac65 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -2625,6 +2625,8 @@ set_no_active_runqs(int active)
erts_aint32_t exp = erts_smp_atomic32_read_nob(&balance_info.no_runqs);
while (1) {
erts_aint32_t act, new;
+ if ((exp & ERTS_NO_RUNQS_MASK) == active)
+ break;
new = exp & (ERTS_NO_RUNQS_MASK << ERTS_NO_USED_RUNQS_SHIFT);
new |= active & ERTS_NO_RUNQS_MASK;
act = erts_smp_atomic32_cmpxchg_nob(&balance_info.no_runqs, new, exp);
@@ -3171,9 +3173,6 @@ evacuate_run_queue(ErtsRunQueue *rq,
if (notify)
smp_notify_inc_runq(to_rq);
}
-
- if (ERTS_EMPTY_RUNQ(rq))
- empty_runq(rq);
}
static int
@@ -4067,9 +4066,8 @@ static void
change_no_used_runqs(int used)
{
ErtsMigrationPaths *new_mpaths, *old_mpaths;
- int active, qix;
+ int qix;
erts_smp_mtx_lock(&balance_info.update_mtx);
- get_no_runqs(&active, NULL);
set_no_used_runqs(used);
old_mpaths = erts_get_migration_paths_managed();
@@ -4697,7 +4695,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online)
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, no_schedulers_online);
+ 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");
balance_info.forced_check_balance = 0;