[tip: perf/core] perf: Optimize __pmu_ctx_sched_out()

[tip-bot2 for Peter Zijlstra]

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@xxxxxxxxxxxxx>
AuthorDate:    Wed, 07 Aug 2024 13:29:29 +02:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Reviewed-by: Kan Liang <kan.liang@xxxxxxxxxxxxxxx>
Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240807115550.392851915@xxxxxxxxxxxxx
---
 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);