linux-kernel - [PATCH 10/10] perf stat: Support inherit/no-inherit terms

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Message-Id: <20170824162737.7813-11-jolsa@kernel.org>
Date:   Thu, 24 Aug 2017 18:27:37 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Andi Kleen <andi@...stfloor.org>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH 10/10] perf stat: Support inherit/no-inherit terms

Adding support to use 'inherit' and 'no-inherit' terms
in perf stat command, like:

To disable perf_event_attr::inherit (enabled by default):

  $ perf stat -e cpu/cpu-cycles,no-inherit/u ...

Enable perf_event_attr::inherit (disabled by -i):

  $ perf stat -i -e cpu/cpu-cycles,inherit/u ...

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-stat.c      | 19 +++++++++++++++++++
 tools/perf/util/parse-events.c |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 866da7aa54bf..92053b93e452 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -210,6 +210,23 @@ static void perf_stat__reset_stats(void)
 	perf_stat__reset_shadow_stats();
 }
 
+static void apply_stat_config_terms(struct perf_evsel *evsel)
+{
+	struct perf_evsel_config_term *term;
+	struct list_head *config_terms = &evsel->config_terms;
+	struct perf_event_attr *attr   = &evsel->attr;
+
+	list_for_each_entry(term, config_terms, list) {
+		switch (term->type) {
+		case PERF_EVSEL__CONFIG_TERM_INHERIT:
+			attr->inherit = term->val.inherit ? 1 : 0;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
 static int create_perf_stat_counter(struct perf_evsel *evsel)
 {
 	struct perf_event_attr *attr = &evsel->attr;
@@ -264,6 +281,8 @@ static int create_perf_stat_counter(struct perf_evsel *evsel)
 			attr->enable_on_exec = 1;
 	}
 
+	apply_stat_config_terms(evsel);
+
 	if (target__has_cpu(&target))
 		return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index f44aeba51d1f..b2b448ff0a36 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -934,6 +934,8 @@ config_term_avail(int term_type, struct parse_events_error *err)
 	case PARSE_EVENTS__TERM_TYPE_CONFIG2:
 	case PARSE_EVENTS__TERM_TYPE_NAME:
 	case PARSE_EVENTS__TERM_TYPE_SAMPLE_PERIOD:
+	case PARSE_EVENTS__TERM_TYPE_INHERIT:
+	case PARSE_EVENTS__TERM_TYPE_NOINHERIT:
 		return true;
 	default:
 		if (!err)
-- 
2.9.5