linux-kernel - [PATCH 02/14] perf util: Use evsel->name to get tracepoint

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Date:	Tue, 23 Apr 2013 17:31:00 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 02/14] perf util: Use evsel->name to get tracepoint_paths

From: Namhyung Kim <namhyung.kim@....com>

Most tracepoint events already have their system and event name in
->name field so that searching whole event tracing directory for each
evsel to match given id is suboptimal.

Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/trace-event-info.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tools/perf/util/trace-event-info.c b/tools/perf/util/trace-event-info.c
index ab18bf12d54a..dcfc1869c9af 100644
--- a/tools/perf/util/trace-event-info.c
+++ b/tools/perf/util/trace-event-info.c
@@ -414,12 +414,31 @@ get_tracepoints_path(struct list_head *pattrs)
 		if (pos->attr.type != PERF_TYPE_TRACEPOINT)
 			continue;
 		++nr_tracepoints;
+
+		if (pos->name && strchr(pos->name, ':')) {
+			char *str = strchr(pos->name, ':');
+
+			ppath->next = zalloc(sizeof(path));
+			if (!ppath->next)
+				goto error;
+
+			ppath->next->system = strndup(pos->name, str - pos->name);
+			ppath->next->name = strdup(str+1);
+
+			if (!ppath->next->system || !ppath->next->name)
+				goto error;
+
+			goto next;
+		}
+
 		ppath->next = tracepoint_id_to_path(pos->attr.config);
 		if (!ppath->next) {
+error:
 			pr_debug("No memory to alloc tracepoints list\n");
 			put_tracepoints_path(&path);
 			return NULL;
 		}
+next:
 		ppath = ppath->next;
 	}
 
-- 
1.7.11.7

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