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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2012-05-08 18:56:04 +0200
committerIngo Molnar <mingo@kernel.org>2012-05-09 15:23:17 +0200
commitcb04ff9ac424d0e689d9b612e9f73cb443ab4b7e (patch)
tree7335f4ca82dc0366ffbf9dc8de5396259213435a /kernel/events
parent8b1e13638d465863572c8207a5cfceeef0cf0441 (diff)
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 <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-o56ajxp1edwqg6x9d31wb805@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c14
1 files changed, 10 insertions, 4 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 00c58df9f4e2..e82c7a1face9 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;