[tip:perf/core] perf tools: Unset perf_event_attr:: freq when period term is set

[tip-bot for Jiri Olsa <tipbot@zytor.com>]

Commit-ID:  ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Gitweb:     http://git.kernel.org/tip/ab35a7d0ee59a36c9c567defe43c1adb72e9240c
Author:     Jiri Olsa <jolsa@redhat.com>
AuthorDate: Sat, 8 Aug 2015 19:12:10 +0200
Committer:  Arnaldo Carvalho de Melo <acme@redhat.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@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20150808171210.GC17040@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.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)