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Date:	Thu, 10 Jul 2014 23:06:56 +0200
From:	Jiri Olsa <>
To:	Ingo Molnar <>
	Arnaldo Carvalho de Melo <>,
	Stanislav Fomichev <>,
	Jiri Olsa <>
Subject: [PATCH 3/4] perf timechart: Conditionally update start_time on fork

From: Stanislav Fomichev <>

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 <>
Acked-by: Namhyung Kim <>
Signed-off-by: Jiri Olsa <>
 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 4079062..37bf1eb 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;

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