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| author | Pavankumar Kondeti <pkondeti@codeaurora.org> | 2017-03-21 15:03:35 +0530 |
|---|---|---|
| committer | Pavankumar Kondeti <pkondeti@codeaurora.org> | 2017-03-21 15:14:24 +0530 |
| commit | d71b1a76b1a797648ec6740f1a206e597d6b139a (patch) | |
| tree | 4acf9949038746630b48f8f794cce216af5fb0dc | |
| parent | f39a5999e2473e890390e3a5aa794a2fd4256544 (diff) | |
sched/core_ctl: Fix state_lock spinlock contention
There is no need to call core_ctl_check() from scheduler tick path
on all CPUs. This results in core_ctl's state_lock spin lock
contention. Assign this job to the CPU which is responsible
for updating the ticks.
Change-Id: I9664037cc25c204d532bdd0f006c7e27ef143497
Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
| -rw-r--r-- | kernel/sched/core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 312ffdad034a..1017a3f77391 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -88,6 +88,7 @@ #include "sched.h" #include "../workqueue_internal.h" #include "../smpboot.h" +#include "../time/tick-internal.h" #define CREATE_TRACE_POINTS #include <trace/events/sched.h> @@ -3260,7 +3261,8 @@ void scheduler_tick(void) if (curr->sched_class == &fair_sched_class) check_for_migration(rq, curr); - core_ctl_check(wallclock); + if (cpu == tick_do_timer_cpu) + core_ctl_check(wallclock); } #ifdef CONFIG_NO_HZ_FULL |