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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2013-08-02 18:29:55 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-08-16 17:55:51 +0200 |
| commit | 948b26b6ddd08a57cb95ebb0dc96fde2edd5c383 (patch) | |
| tree | 7b358b7d8ab23ffadd170aba686768a74d7b8b01 /init | |
| parent | fc3b86d673e41ac66b4ba5b75a90c2fcafb90089 (diff) | |
| download | op-kernel-dev-948b26b6ddd08a57cb95ebb0dc96fde2edd5c383.zip op-kernel-dev-948b26b6ddd08a57cb95ebb0dc96fde2edd5c383.tar.gz | |
perf: Account freq events globally
Freq events may not always be affine to a particular CPU. As such,
account_event_cpu() may crash if we account per cpu a freq event
that has event->cpu == -1.
To solve this, lets account freq events globally. In practice
this doesn't change much the picture because perf tools create
per-task perf events with one event per CPU by default. Profiling a
single CPU is usually a corner case so there is no much point in
optimizing things that way.
Reported-by: Jiri Olsa <jolsa@redhat.com>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1375460996-16329-3-git-send-email-fweisbec@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions
