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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 /include/linux/perf_event.h
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 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h24
1 files changed, 6 insertions, 18 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index f32578634d9d..8adf70e9e3cc 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1084,10 +1084,8 @@ extern void perf_pmu_unregister(struct pmu *pmu);
extern int perf_num_counters(void);
extern const char *perf_pmu_name(void);
-extern void __perf_event_task_sched_in(struct task_struct *prev,
- struct task_struct *task);
-extern void __perf_event_task_sched_out(struct task_struct *prev,
- struct task_struct *next);
+extern void __perf_event_task_sched(struct task_struct *prev,
+ struct task_struct *next);
extern int perf_event_init_task(struct task_struct *child);
extern void perf_event_exit_task(struct task_struct *child);
extern void perf_event_free_task(struct task_struct *task);
@@ -1207,20 +1205,13 @@ perf_sw_event(u32 event_id, u64 nr, struct pt_regs *regs, u64 addr)
extern struct static_key_deferred perf_sched_events;
-static inline void perf_event_task_sched_in(struct task_struct *prev,
+static inline void perf_event_task_sched(struct task_struct *prev,
struct task_struct *task)
{
- if (static_key_false(&perf_sched_events.key))
- __perf_event_task_sched_in(prev, task);
-}
-
-static inline void perf_event_task_sched_out(struct task_struct *prev,
- struct task_struct *next)
-{
perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, NULL, 0);
if (static_key_false(&perf_sched_events.key))
- __perf_event_task_sched_out(prev, next);
+ __perf_event_task_sched(prev, task);
}
extern void perf_event_mmap(struct vm_area_struct *vma);
@@ -1295,11 +1286,8 @@ extern void perf_event_disable(struct perf_event *event);
extern void perf_event_task_tick(void);
#else
static inline void
-perf_event_task_sched_in(struct task_struct *prev,
- struct task_struct *task) { }
-static inline void
-perf_event_task_sched_out(struct task_struct *prev,
- struct task_struct *next) { }
+perf_event_task_sched(struct task_struct *prev,
+ struct task_struct *task) { }
static inline int perf_event_init_task(struct task_struct *child) { return 0; }
static inline void perf_event_exit_task(struct task_struct *child) { }
static inline void perf_event_free_task(struct task_struct *task) { }