linux-kernel - [tip:perf/core] perf tools: Add stat config event read function

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Date:	Fri, 18 Dec 2015 01:03:45 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	a.p.zijlstra@...llo.nl, kan.liang@...el.com, acme@...hat.com,
	namhyung@...nel.org, tglx@...utronix.de, hpa@...or.com,
	dsahern@...il.com, jolsa@...nel.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org
Subject: [tip:perf/core] perf tools: Add stat config event read function

Commit-ID:  8e381596b67af53564a69f16440d3e5d5a73d034
Gitweb:     http://git.kernel.org/tip/8e381596b67af53564a69f16440d3e5d5a73d034
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Sun, 25 Oct 2015 15:51:29 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 17 Dec 2015 14:38:19 -0300

perf tools: Add stat config event read function

Introducing the perf_event__read_stat_config function to read a struct
perf_stat_config object data from a stat config event.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Kan Liang <kan.liang@...el.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-14-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/stat.c |  6 ++++++
 tools/perf/util/event.c | 24 ++++++++++++++++++++++++
 tools/perf/util/event.h |  2 ++
 3 files changed, 32 insertions(+)

diff --git a/tools/perf/tests/stat.c b/tools/perf/tests/stat.c
index c7a2bdb..aa35d28 100644
--- a/tools/perf/tests/stat.c
+++ b/tools/perf/tests/stat.c
@@ -24,6 +24,7 @@ static int process_event(struct perf_tool *tool __maybe_unused,
 			 struct machine *machine __maybe_unused)
 {
 	struct stat_config_event *config = &event->stat_config;
+	struct perf_stat_config stat_config;
 
 #define HAS(term, val) \
 	has_term(config, PERF_STAT_CONFIG_TERM__##term, val)
@@ -35,6 +36,11 @@ static int process_event(struct perf_tool *tool __maybe_unused,
 
 #undef HAS
 
+	perf_event__read_stat_config(&stat_config, config);
+
+	TEST_ASSERT_VAL("wrong aggr_mode", stat_config.aggr_mode == AGGR_CORE);
+	TEST_ASSERT_VAL("wrong scale",     stat_config.scale == 1);
+	TEST_ASSERT_VAL("wrong interval",  stat_config.interval == 1);
 	return 0;
 }
 
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 1ea693c..223deaf 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -909,6 +909,30 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
 	return err;
 }
 
+void perf_event__read_stat_config(struct perf_stat_config *config,
+				  struct stat_config_event *event)
+{
+	unsigned i;
+
+	for (i = 0; i < event->nr; i++) {
+
+		switch (event->data[i].tag) {
+#define CASE(__term, __val)					\
+		case PERF_STAT_CONFIG_TERM__##__term:		\
+			config->__val = event->data[i].val;	\
+			break;
+
+		CASE(AGGR_MODE, aggr_mode)
+		CASE(SCALE,     scale)
+		CASE(INTERVAL,  interval)
+#undef CASE
+		default:
+			pr_warning("unknown stat config term %" PRIu64 "\n",
+				   event->data[i].tag);
+		}
+	}
+}
+
 size_t perf_event__fprintf_comm(union perf_event *event, FILE *fp)
 {
 	const char *s;
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 39014c7..4e87be2 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -477,6 +477,8 @@ int perf_event__synthesize_stat_config(struct perf_tool *tool,
 				       struct perf_stat_config *config,
 				       perf_event__handler_t process,
 				       struct machine *machine);
+void perf_event__read_stat_config(struct perf_stat_config *config,
+				  struct stat_config_event *event);
 
 int perf_event__synthesize_modules(struct perf_tool *tool,
 				   perf_event__handler_t process,
--
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