From b5e58793c7a8ec35e72ea6ec6c353499dd189809 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 21 May 2010 14:43:12 +0200 Subject: [PATCH] perf: Add perf_event_count() Create a helper function for those sites that want to read the event count. Signed-off-by: Peter Zijlstra Cc: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker Cc: Paul Mackerras Cc: Mike Galbraith Cc: Steven Rostedt LKML-Reference: Signed-off-by: Ingo Molnar --- kernel/perf_event.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/kernel/perf_event.c b/kernel/perf_event.c index f75c9c9c8177..ab4c0ffc271c 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -1736,6 +1736,11 @@ static void __perf_event_read(void *info) event->pmu->read(event); } +static inline u64 perf_event_count(struct perf_event *event) +{ + return atomic64_read(&event->count); +} + static u64 perf_event_read(struct perf_event *event) { /* @@ -1755,7 +1760,7 @@ static u64 perf_event_read(struct perf_event *event) raw_spin_unlock_irqrestore(&ctx->lock, flags); } - return atomic64_read(&event->count); + return perf_event_count(event); } /* @@ -2352,7 +2357,7 @@ void perf_event_update_userpage(struct perf_event *event) ++userpg->lock; barrier(); userpg->index = perf_event_index(event); - userpg->offset = atomic64_read(&event->count); + userpg->offset = perf_event_count(event); if (event->state == PERF_EVENT_STATE_ACTIVE) userpg->offset -= atomic64_read(&event->hw.prev_count); @@ -3211,7 +3216,7 @@ static void perf_output_read_one(struct perf_output_handle *handle, u64 values[4]; int n = 0; - values[n++] = atomic64_read(&event->count); + values[n++] = perf_event_count(event); if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { values[n++] = event->total_time_enabled + atomic64_read(&event->child_total_time_enabled); @@ -3248,7 +3253,7 @@ static void perf_output_read_group(struct perf_output_handle *handle, if (leader != event) leader->pmu->read(leader); - values[n++] = atomic64_read(&leader->count); + values[n++] = perf_event_count(leader); if (read_format & PERF_FORMAT_ID) values[n++] = primary_event_id(leader); @@ -3260,7 +3265,7 @@ static void perf_output_read_group(struct perf_output_handle *handle, if (sub != event) sub->pmu->read(sub); - values[n++] = atomic64_read(&sub->count); + values[n++] = perf_event_count(sub); if (read_format & PERF_FORMAT_ID) values[n++] = primary_event_id(sub); @@ -5369,7 +5374,7 @@ static void sync_child_event(struct perf_event *child_event, if (child_event->attr.inherit_stat) perf_event_read_event(child_event, child); - child_val = atomic64_read(&child_event->count); + child_val = perf_event_count(child_event); /* * Add back the child's count to the parent's count: -- GitLab