linux-kernel - [PATCH] perf report: fix event name reporting

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Date:	Fri,  8 Jun 2012 16:23:27 +0400
From:	Dmitry Antipov <dmitry.antipov@...aro.org>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, linaro-dev@...ts.linaro.org,
	patches@...aro.org, Dmitry Antipov <dmitry.antipov@...aro.org>
Subject: [PATCH] perf report: fix event name reporting

Use trace_find_event to find event name before looking through
/sys files. This helps 'perf report' to show real event names
instead of 'unknown:unknown' when processing perf.data recorded
on another machine.

Signed-off-by: Dmitry Antipov <dmitry.antipov@...aro.org>
---
 tools/perf/builtin-report.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 8c767c6..a6fd309 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -24,6 +24,7 @@
 #include "util/evlist.h"
 #include "util/evsel.h"
 #include "util/header.h"
+#include "util/trace-event.h"
 #include "util/session.h"
 #include "util/tool.h"
 
@@ -314,7 +315,8 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
 
 	list_for_each_entry(pos, &evlist->entries, node) {
 		struct hists *hists = &pos->hists;
-		const char *evname = event_name(pos);
+		struct event_format *event = trace_find_event(pos->attr.config);
+		const char *evname = event ? event->name : event_name(pos);
 
 		hists__fprintf_nr_sample_events(hists, evname, stdout);
 		hists__fprintf(hists, NULL, false, true, 0, 0, stdout);
-- 
1.7.7.6

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