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authorPeter Zijlstra <peterz@infradead.org>2013-07-16 17:09:07 +0200
committerIngo Molnar <mingo@kernel.org>2013-07-23 12:17:08 +0200
commita5cdd40c9877e9aba704c020fd65d26b5cfecf18 (patch)
treec982579a4e7dc506c16b822b02b768a28616af35 /kernel/events
parent17f41571bb2c4a398785452ac2718a6c5d77180e (diff)
perf: Update perf_event_type documentation
Due to a discussion with Adrian I had a good look at the perf_event_type record layout and found the documentation to be somewhat unclear. Cc: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20130716150907.GL23818@dyad.programming.kicks-ass.net Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/events')
-rw-r--r--kernel/events/core.c31
1 files changed, 16 insertions, 15 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 5e2bce90b477..127411400116 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -4462,20 +4462,6 @@ void perf_output_sample(struct perf_output_handle *handle,
}
}
- if (!event->attr.watermark) {
- int wakeup_events = event->attr.wakeup_events;
-
- if (wakeup_events) {
- struct ring_buffer *rb = handle->rb;
- int events = local_inc_return(&rb->events);
-
- if (events >= wakeup_events) {
- local_sub(wakeup_events, &rb->events);
- local_inc(&rb->wakeup);
- }
- }
- }
-
if (sample_type & PERF_SAMPLE_BRANCH_STACK) {
if (data->br_stack) {
size_t size;
@@ -4511,16 +4497,31 @@ void perf_output_sample(struct perf_output_handle *handle,
}
}
- if (sample_type & PERF_SAMPLE_STACK_USER)
+ if (sample_type & PERF_SAMPLE_STACK_USER) {
perf_output_sample_ustack(handle,
data->stack_user_size,
data->regs_user.regs);
+ }
if (sample_type & PERF_SAMPLE_WEIGHT)
perf_output_put(handle, data->weight);
if (sample_type & PERF_SAMPLE_DATA_SRC)
perf_output_put(handle, data->data_src.val);
+
+ if (!event->attr.watermark) {
+ int wakeup_events = event->attr.wakeup_events;
+
+ if (wakeup_events) {
+ struct ring_buffer *rb = handle->rb;
+ int events = local_inc_return(&rb->events);
+
+ if (events >= wakeup_events) {
+ local_sub(wakeup_events, &rb->events);
+ local_inc(&rb->wakeup);
+ }
+ }
+ }
}
void perf_prepare_sample(struct perf_event_header *header,