linux-kernel - [PATCH 1/9] perf tools: Add nameid value into evsel object

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Date:	Tue,  2 Jun 2015 00:59:55 +0200
From:	Jiri Olsa <jolsa@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 1/9] perf tools: Add nameid value into evsel object

Adding a way to tag an evsel object with ID value based
on its name. It will be used for transaction events,
but could be useful for others.

This way we can identify transactions events and get rid
of the current position based way we use.

Link: http://lkml.kernel.org/n/tip-9lnvjksibrs0flhkpix2qkm9@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/util/evsel.c        | 22 ++++++++++++++++++++++
 tools/perf/util/evsel.h        | 11 +++++++++++
 tools/perf/util/parse-events.c |  2 +-
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index a3e36fc634dc..9e057319933d 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -80,6 +80,28 @@ set_methods:
 	return 0;
 }
 
+#define ID(id, name) [PERF_EVSEL_NAMEID__##id] = #name
+static const char *nameid_str[PERF_EVSEL_NAMEID__MAX] = {
+	ID(NONE, x),
+};
+#undef ID
+
+void perf_evsel__name_init(struct perf_evsel *evsel, char *name)
+{
+	enum perf_evsel_nameid nameid = PERF_EVSEL_NAMEID__NONE;
+	int i;
+
+	for (i = 0; i < PERF_EVSEL_NAMEID__MAX; i++) {
+		if (!strcmp(name, nameid_str[i])) {
+			nameid = i;
+			break;
+		}
+	}
+
+	evsel->nameid = nameid;
+	evsel->name   = strdup(name);
+}
+
 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 
 int __perf_evsel__sample_size(u64 sample_type)
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 21ec08247d47..f89f34f1a7a1 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -46,6 +46,13 @@ struct perf_sample_id {
 
 struct cgroup_sel;
 
+enum perf_evsel_nameid {
+	PERF_EVSEL_NAMEID__NONE = 0,
+	PERF_EVSEL_NAMEID__MAX,
+};
+
+#define perf_evsel__is(evsel, id) (evsel->nameid == PERF_EVSEL_NAMEID__ ## id)
+
 /** struct perf_evsel - event selector
  *
  * @name - Can be set to retain the original event name passed by the user,
@@ -100,6 +107,8 @@ struct perf_evsel {
 	unsigned long		*per_pkg_mask;
 	struct perf_evsel	*leader;
 	char			*group_name;
+
+	enum perf_evsel_nameid	nameid;
 };
 
 union u64_swap {
@@ -366,4 +375,6 @@ typedef int (*attr__fprintf_f)(FILE *, const char *, const char *, void *);
 int perf_event_attr__fprintf(FILE *fp, struct perf_event_attr *attr,
 			     attr__fprintf_f attr__fprintf, void *priv);
 
+void perf_evsel__name_init(struct perf_evsel *evsel, char *name);
+
 #endif /* __PERF_EVSEL_H */
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index 2a4d1ec02846..abf0ff07b9cf 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -890,7 +890,7 @@ int parse_events_name(struct list_head *list, char *name)
 
 	__evlist__for_each(list, evsel) {
 		if (!evsel->name)
-			evsel->name = strdup(name);
+			perf_evsel__name_init(evsel, name);
 	}
 
 	return 0;
-- 
1.9.3

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