linux-kernel - [tip:perf/core] perf tools: Unset perf_event

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Date:	Wed, 12 Aug 2015 05:29:54 -0700
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	jolsa@...nel.org, acme@...hat.com, mingo@...nel.org,
	linux-kernel@...r.kernel.org, tglx@...utronix.de, jolsa@...hat.com,
	ak@...ux.intel.com, kan.liang@...el.com, namhyung@...nel.org,
	hpa@...or.com
Subject: [tip:perf/core] perf tools: Unset perf_event_attr::
 freq when period term is set

Commit-ID:  ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Gitweb:     http://git.kernel.org/tip/ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Author:     Jiri Olsa <jolsa@...hat.com>
AuthorDate: Sat, 8 Aug 2015 19:12:10 +0200
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 10 Aug 2015 11:58:05 -0300

perf tools: Unset perf_event_attr::freq when period term is set

We need to unset 'perf_event_attr::freq' bit (default 1) when
'period' term is specified within event definition like:

  -e 'cpu/cpu-cycles,call-graph=fp,time,period=100000'

otherwise it will handle the period value as frequency
(and fail if it crossed the maximum allowed frequency value).

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Kan Liang <kan.liang@...el.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: http://lkml.kernel.org/r/20150808171210.GC17040@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/evsel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index f572f46..a59710f 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -598,6 +598,7 @@ static void apply_config_terms(struct perf_evsel *evsel)
 		switch (term->type) {
 		case PERF_EVSEL__CONFIG_TERM_PERIOD:
 			attr->sample_period = term->val.period;
+			attr->freq = 0;
 			break;
 		case PERF_EVSEL__CONFIG_TERM_TIME:
 			if (term->val.time)
--
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