linux-kernel - [PATCH 3/4] perf timechart: conditionally update start

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Message-Id: <1403260191-10079-4-git-send-email-stfomichev@yandex-team.ru>
Date:	Fri, 20 Jun 2014 14:29:50 +0400
From:	Stanislav Fomichev <stfomichev@...dex-team.ru>
To:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...nel.org, stfomichev@...dex-team.ru, namhyung@...nel.org,
	artagnon@...il.com, jolsa@...hat.com, rusty@...tcorp.com.au,
	bp@...e.de
Cc:	linux-kernel@...r.kernel.org
Subject: [PATCH 3/4] perf timechart: conditionally update start_time on fork

We don't need to overwrite current task start_time on fork, so update it
only if it's zero.

Signed-off-by: Stanislav Fomichev <stfomichev@...dex-team.ru>
---
 tools/perf/builtin-timechart.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 8d454c55bc4e..011569becc65 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -242,7 +242,7 @@ static void pid_fork(struct timechart *tchart, int pid, int ppid, u64 timestamp)
 		pid_set_comm(tchart, pid, pp->current->comm);
 
 	p->start_time = timestamp;
-	if (p->current) {
+	if (p->current && !p->current->start_time) {
 		p->current->start_time = timestamp;
 		p->current->state_since = timestamp;
 	}
-- 
1.8.3.2

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