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Commit 09af2a55 authored by Namhyung Kim's avatar Namhyung Kim Committed by Arnaldo Carvalho de Melo
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perf record: Support per-event freq term 



Now perf can set per-event value of time and (sampling) period.  But I
guess most users like me just want to set frequency rather than period.
So add the 'freq' term in the event parser.

Signed-off-by: default avatarNamhyung Kim <namhyung@kernel.org>
Acked-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1439102724-14079-1-git-send-email-namhyung@kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 31191a85

tools/perf/Documentation/perf-record.txt

+1 −0
Original line number Diff line number Diff line
@@ -49,6 +49,7 @@ OPTIONS 
	  These params can be used to overload default config values per event.

	  Here is a list of the params.

	  - 'period': Set event sampling period

	  - 'freq': Set event sampling frequency

	  - 'time': Disable/enable time stamping. Acceptable values are 1 for

		    enabling time stamping. 0 for disabling time stamping.

		    The default is 1.

tools/perf/util/evsel.c

+4 −0
Original line number Diff line number Diff line
@@ -600,6 +600,10 @@ static void apply_config_terms(struct perf_evsel *evsel) 
			attr->sample_period = term->val.period;

			attr->freq = 0;

			break;

		case PERF_EVSEL__CONFIG_TERM_FREQ:

			attr->sample_freq = term->val.freq;

			attr->freq = 1;

			break;

		case PERF_EVSEL__CONFIG_TERM_TIME:

			if (term->val.time)

				perf_evsel__set_sample_bit(evsel, TIME);

tools/perf/util/evsel.h

+2 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ struct cgroup_sel; 
*/

enum {

	PERF_EVSEL__CONFIG_TERM_PERIOD,

	PERF_EVSEL__CONFIG_TERM_FREQ,

	PERF_EVSEL__CONFIG_TERM_TIME,

	PERF_EVSEL__CONFIG_TERM_MAX,

};
@@ -48,6 +49,7 @@ struct perf_evsel_config_term { 
	int	type;

	union {

		u64	period;

		u64	freq;

		bool	time;

	} val;

};

tools/perf/util/parse-events.c

+6 −0
Original line number Diff line number Diff line
@@ -597,6 +597,9 @@ do { \ 
	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:

		CHECK_TYPE_VAL(NUM);

		break;

	case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:

		CHECK_TYPE_VAL(NUM);

		break;

	case PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE:

		/*

		 * TODO uncomment when the field is available
@@ -659,6 +662,9 @@ do { \ 
		case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:

			ADD_CONFIG_TERM(PERIOD, period, term->val.num);

			break;

		case PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ:

			ADD_CONFIG_TERM(FREQ, freq, term->val.num);

			break;

		case PARSE_EVENTS__TERM_TYPE_TIME:

			ADD_CONFIG_TERM(TIME, time, term->val.num);

			break;

tools/perf/util/parse-events.h

+1 −0
Original line number Diff line number Diff line
@@ -62,6 +62,7 @@ enum { 
	PARSE_EVENTS__TERM_TYPE_CONFIG2,

	PARSE_EVENTS__TERM_TYPE_NAME,

	PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD,

	PARSE_EVENTS__TERM_TYPE_SAMPLE_FREQ,

	PARSE_EVENTS__TERM_TYPE_BRANCH_SAMPLE_TYPE,

	PARSE_EVENTS__TERM_TYPE_TIME,

};