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

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.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@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.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