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| author | Stephane Eranian <eranian@google.com> | 2013-04-03 14:21:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2013-05-28 09:13:51 +0200 |
| commit | 62b8563979273424d6ebe9201e34d1acc133ad4f (patch) | |
| tree | 913ae791ea01842768a0a71a472779a62fc6ddcc /include/linux/perf_event.h | |
| parent | 9e6302056f8029f438e853432a856b9f13de26a6 (diff) | |
| download | lwn-62b8563979273424d6ebe9201e34d1acc133ad4f.tar.gz lwn-62b8563979273424d6ebe9201e34d1acc133ad4f.zip | |
perf: Add sysfs entry to adjust multiplexing interval per PMU
This patch adds /sys/device/xxx/perf_event_mux_interval_ms to ajust
the multiplexing interval per PMU. The unit is milliseconds. Value has
to be >= 1.
In the 4th version, we renamed the sysfs file to be more consistent
with the other /proc/sys/kernel entries for perf_events.
In the 5th version, we handle the reprogramming of the hrtimer using
hrtimer_forward_now(). That way, we sync up to new timer value quickly
(suggested by Jiri Olsa).
Signed-off-by: Stephane Eranian <eranian@google.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: http://lkml.kernel.org/r/1364991694-5876-3-git-send-email-eranian@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 72138d75a60a..6fddac1b27cb 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -194,6 +194,7 @@ struct pmu { int * __percpu pmu_disable_count; struct perf_cpu_context * __percpu pmu_cpu_context; int task_ctx_nr; + int hrtimer_interval_ms; /* * Fully disable/enable this PMU, can be used to protect from the PMI |