linux-kernel - [PATCH 5/5] perf tools: Fix perf_session_

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Date:	Tue, 25 Jun 2013 13:54:13 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	linux-kernel@...r.kernel.org
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Andi Kleen <ak@...ux.intel.com>,
	David Ahern <dsahern@...il.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 5/5] perf tools: Fix perf_session__delete removal for report command

There's no point of having out_delete label with perf_session__delete
call within __cmd_report function, because it's called at the
end of the cmd_report function.

The speed up due to commenting out the perf_session__delete
at the end does not seem relevant anymore. Measured speedup
for ~1GB data file with 222466 FORKS events is around 0.5%.

  $ perf report -i perf.data.delete -P perf_session__delete -s parent

  +  99.51%  [other]
  +   0.49%  perf_session__delete

Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: Corey Ashford <cjashfor@...ux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Stephane Eranian <eranian@...gle.com>
---
 tools/perf/builtin-report.c | 23 +++++------------------
 1 file changed, 5 insertions(+), 18 deletions(-)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 8c2c7ce..36de70d 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -497,7 +497,7 @@ static int __cmd_report(struct perf_report *rep)
 		ret = perf_session__cpu_bitmap(session, rep->cpu_list,
 					       rep->cpu_bitmap);
 		if (ret)
-			goto out_delete;
+			return ret;
 	}
 
 	if (use_browser <= 0)
@@ -508,11 +508,11 @@ static int __cmd_report(struct perf_report *rep)
 
 	ret = perf_report__setup_sample_type(rep);
 	if (ret)
-		goto out_delete;
+		return ret;
 
 	ret = perf_session__process_events(session, &rep->tool);
 	if (ret)
-		goto out_delete;
+		return ret;
 
 	kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION];
 	kernel_kmap = map__kmap(kernel_map);
@@ -547,7 +547,7 @@ static int __cmd_report(struct perf_report *rep)
 
 	if (dump_trace) {
 		perf_session__fprintf_nr_events(session, stdout);
-		goto out_delete;
+		return 0;
 	}
 
 	nr_samples = 0;
@@ -572,7 +572,7 @@ static int __cmd_report(struct perf_report *rep)
 
 	if (nr_samples == 0) {
 		ui__error("The %s file has no samples!\n", session->filename);
-		goto out_delete;
+		return 0;
 	}
 
 	list_for_each_entry(pos, &session->evlist->entries, node)
@@ -598,19 +598,6 @@ static int __cmd_report(struct perf_report *rep)
 	} else
 		perf_evlist__tty_browse_hists(session->evlist, rep, help);
 
-out_delete:
-	/*
-	 * Speed up the exit process, for large files this can
-	 * take quite a while.
-	 *
-	 * XXX Enable this when using valgrind or if we ever
-	 * librarize this command.
-	 *
-	 * Also experiment with obstacks to see how much speed
-	 * up we'll get here.
-	 *
- 	 * perf_session__delete(session);
- 	 */
 	return ret;
 }
 
-- 
1.7.11.7

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