Commit-ID: 895dd92c032e1604aa0d7afaef7716e058343b67 Gitweb: http://git.kernel.org/tip/895dd92c032e1604aa0d7afaef7716e058343b67 Author: Andrew Vagin <ava...@openvz.org> AuthorDate: Thu, 12 Jul 2012 14:14:29 +0400 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Thu, 26 Jul 2012 12:23:10 +0200
sched: Deliver sched_switch events to the current task Otherwise they can't be filtered for a defined task: perf record -e sched:sched_switch ./foo This command doesn't report any events without this patch. I think it isn't a security concern if someone knows who will be executed next - this can already be observed by polling /proc state. By default perf is disabled for non-root users in any case. I need these events for profiling sleep times. sched_switch is used for getting callchains and sched_stat_* is used for getting time periods. These events are combined in user space, then it can be analyzed by perf tools. Signed-off-by: Andrew Vagin <ava...@openvz.org> Signed-off-by: Peter Zijlstra <a.p.zijls...@chello.nl> Cc: Steven Rostedt <rost...@goodmis.org> Cc: Arun Sharma <asha...@fb.com> Link: http://lkml.kernel.org/r/1342088069-1005148-1-git-send-email-ava...@openvz.org Signed-off-by: Ingo Molnar <mi...@kernel.org> --- kernel/sched/core.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 468bdd4..ad732b5 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -1910,12 +1910,12 @@ static inline void prepare_task_switch(struct rq *rq, struct task_struct *prev, struct task_struct *next) { + trace_sched_switch(prev, next); sched_info_switch(prev, next); perf_event_task_sched_out(prev, next); fire_sched_out_preempt_notifiers(prev, next); prepare_lock_switch(rq, next); prepare_arch_switch(next); - trace_sched_switch(prev, next); } /** -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
