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authorStephane Eranian <eranian@google.com>2013-04-03 14:21:34 +0200
committerIngo Molnar <mingo@kernel.org>2013-05-28 09:13:51 +0200
commit62b8563979273424d6ebe9201e34d1acc133ad4f (patch)
tree913ae791ea01842768a0a71a472779a62fc6ddcc /include/linux/perf_event.h
parent9e6302056f8029f438e853432a856b9f13de26a6 (diff)
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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.h1
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