diff options
author | Andrew Vagin <avagin@openvz.org> | 2012-07-12 14:14:29 +0400 |
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committer | Ingo Molnar <mingo@kernel.org> | 2012-07-26 12:23:10 +0200 |
commit | 895dd92c032e1604aa0d7afaef7716e058343b67 (patch) | |
tree | 8662091be28c24a44287fc43790cf92547499a83 /arch/x86/kernel | |
parent | 045e7e6047037d93824d265cc30c33eb631f8883 (diff) |
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 <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Arun Sharma <asharma@fb.com>
Link: http://lkml.kernel.org/r/1342088069-1005148-1-git-send-email-avagin@openvz.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel')
0 files changed, 0 insertions, 0 deletions