Commit 92e51938 authored Sep 26, 2011 by Andrew Vagin Committed by Ingo Molnar Oct 04, 2011

perf: Fix counter of ftrace events



Each event adds some points to its counters. By default it adds 1,
and a number of points may be transmited in event's parameters.

E.g. sched:sched_stat_runtime adds how long process has been running.

But this functionality was broken by v2.6.31-rc5-392-gf413cdb
and now the event's parameters doesn't affect on a number of points.

TP_perf_assign isn't defined, so __perf_count(c) isn't executed and
__count is always equal to 1.

Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1317052535-1765247-2-git-send-email-avagin@openvz.org


Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 87ffef79

include/trace/ftrace.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -711,6 +711,9 @@ __attribute__((section("_ftrace_events"))) *__event_##call = &event_##call
		#undef __perf_count
		#define __perf_count(c) __count = (c)

		#undef TP_perf_assign
		#define TP_perf_assign(args...) args

		#undef DECLARE_EVENT_CLASS
		#define DECLARE_EVENT_CLASS(call, proto, args, tstruct, assign, print) \
		static notrace void \

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