From cb04ff9ac424d0e689d9b612e9f73cb443ab4b7e Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Tue, 8 May 2012 18:56:04 +0200 Subject: sched, perf: Use a single callback into the scheduler We can easily use a single callback for both sched-in and sched-out. This reduces the code footprint in the scheduler path as well as removes the PMU black spot otherwise present between the out and in callback. Signed-off-by: Peter Zijlstra Link: http://lkml.kernel.org/n/tip-o56ajxp1edwqg6x9d31wb805@git.kernel.org Signed-off-by: Ingo Molnar --- kernel/events/core.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'kernel/events/core.c') diff --git a/kernel/events/core.c b/kernel/events/core.c index 00c58df9f4e..e82c7a1face 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2039,8 +2039,8 @@ static void perf_event_context_sched_out(struct task_struct *task, int ctxn, * accessing the event control register. If a NMI hits, then it will * not restart the event. */ -void __perf_event_task_sched_out(struct task_struct *task, - struct task_struct *next) +static void __perf_event_task_sched_out(struct task_struct *task, + struct task_struct *next) { int ctxn; @@ -2279,8 +2279,8 @@ static void perf_branch_stack_sched_in(struct task_struct *prev, * accessing the event control register. If a NMI hits, then it will * keep the event running. */ -void __perf_event_task_sched_in(struct task_struct *prev, - struct task_struct *task) +static void __perf_event_task_sched_in(struct task_struct *prev, + struct task_struct *task) { struct perf_event_context *ctx; int ctxn; @@ -2305,6 +2305,12 @@ void __perf_event_task_sched_in(struct task_struct *prev, perf_branch_stack_sched_in(prev, task); } +void __perf_event_task_sched(struct task_struct *prev, struct task_struct *next) +{ + __perf_event_task_sched_out(prev, next); + __perf_event_task_sched_in(prev, next); +} + static u64 perf_calculate_period(struct perf_event *event, u64 nsec, u64 count) { u64 frequency = event->attr.sample_freq; -- cgit v1.2.3