The following commit has been merged into the perf/core branch of tip:
Commit-ID: 3e15a3fe3a2a170c5be52783667706875c088f96
Gitweb: https://git.kernel.org/tip/3e15a3fe3a2a170c5be52783667706875c088f96
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Wed, 07 Aug 2024 13:29:29 +02:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Thu, 08 Aug 2024 12:27:32 +02:00
perf: Optimize __pmu_ctx_sched_out()
There is is no point in doing the perf_pmu_disable() dance just to do
nothing. This happens for ctx_sched_out(.type = EVENT_TIME) for
instance.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240807115550.392851915@infradead.org
---
kernel/events/core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 197d3be..9893ba5 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3312,7 +3312,7 @@ static void __pmu_ctx_sched_out(struct perf_event_pmu_context *pmu_ctx,
cpc->task_epc = NULL;
}
- if (!event_type)
+ if (!(event_type & EVENT_ALL))
return;
perf_pmu_disable(pmu);