aboutsummaryrefslogtreecommitdiffstats
path: root/include/linux/perf_event.h
diff options
context:
space:
mode:
authorPeter Zijlstra <a.p.zijlstra@chello.nl>2010-11-26 13:49:04 +0100
committerIngo Molnar <mingo@elte.hu>2010-11-26 15:00:59 +0100
commitee6dcfa40a50fe12a3ae0fb4d2653c66c3ed6556 (patch)
treee77ac01a6bf2106f7a2c22f00e43cb2960d72ba5 /include/linux/perf_event.h
parentcc2067a51424dd25c10c1b1230b4222d8baec94d (diff)
downloadmrst-s0i3-test-ee6dcfa40a50fe12a3ae0fb4d2653c66c3ed6556.tar.gz
mrst-s0i3-test-ee6dcfa40a50fe12a3ae0fb4d2653c66c3ed6556.tar.xz
mrst-s0i3-test-ee6dcfa40a50fe12a3ae0fb4d2653c66c3ed6556.zip
perf: Fix the software context switch counter
Stephane noticed that because the perf_sw_event() call is inside the perf_event_task_sched_out() call it won't get called unless we have a per-task counter. Reported-by: Stephane Eranian <eranian@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h29
1 files changed, 15 insertions, 14 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 142e3d6042c..de2c41758e2 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -909,20 +909,6 @@ extern int perf_num_counters(void);
extern const char *perf_pmu_name(void);
extern void __perf_event_task_sched_in(struct task_struct *task);
extern void __perf_event_task_sched_out(struct task_struct *task, struct task_struct *next);
-
-extern atomic_t perf_task_events;
-
-static inline void perf_event_task_sched_in(struct task_struct *task)
-{
- COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));
-}
-
-static inline
-void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
-{
- COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, 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);
@@ -1031,6 +1017,21 @@ have_event:
__perf_sw_event(event_id, nr, nmi, regs, addr);
}
+extern atomic_t perf_task_events;
+
+static inline void perf_event_task_sched_in(struct task_struct *task)
+{
+ COND_STMT(&perf_task_events, __perf_event_task_sched_in(task));
+}
+
+static inline
+void perf_event_task_sched_out(struct task_struct *task, struct task_struct *next)
+{
+ perf_sw_event(PERF_COUNT_SW_CONTEXT_SWITCHES, 1, 1, NULL, 0);
+
+ COND_STMT(&perf_task_events, __perf_event_task_sched_out(task, next));
+}
+
extern void perf_event_mmap(struct vm_area_struct *vma);
extern struct perf_guest_info_callbacks *perf_guest_cbs;
extern int perf_register_guest_info_callbacks(struct perf_guest_info_callbacks *callbacks);