linux-kernel - [tip:perf/core] perf tools: Use machine-> pid for tgid if machine is guest.

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Date:	Sun, 12 Jan 2014 10:37:23 -0800
From:	tip-bot for Dongsheng Yang <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	acme@...hat.com, linux-kernel@...r.kernel.org, hpa@...or.com,
	mingo@...nel.org, namhyung.kim@....com, jolsa@...hat.com,
	dsahern@...il.com, tglx@...utronix.de, yangds.fnst@...fujitsu.com
Subject: [tip:perf/core] perf tools: Use machine->
 pid for tgid if machine is guest.

Commit-ID:  f5db57c4c47f3985dfc677152e25636a3401fa13
Gitweb:     http://git.kernel.org/tip/f5db57c4c47f3985dfc677152e25636a3401fa13
Author:     Dongsheng Yang <yangds.fnst@...fujitsu.com>
AuthorDate: Fri, 20 Dec 2013 15:52:59 -0500
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Mon, 23 Dec 2013 16:49:50 -0300

perf tools: Use machine->pid for tgid if machine is guest.

When we synthesize an comm event, if machine is guest, we should
use the pid of machine as the event->comm.pid, rather than tgid
of thread.

Signed-off-by: Dongsheng Yang <yangds.fnst@...fujitsu.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Namhyung Kim <namhyung.kim@....com>
Link: http://lkml.kernel.org/r/22455abe107c618a361e7b667ad0f098f7c9b4a3.1387572416.git.yangds.fnst@cn.fujitsu.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/event.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 07c0783..2905771 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -106,8 +106,12 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 
 	memset(&event->comm, 0, sizeof(event->comm));
 
-	tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
-					 sizeof(event->comm.comm));
+	if (machine__is_host(machine))
+		tgid = perf_event__get_comm_tgid(pid, event->comm.comm,
+						 sizeof(event->comm.comm));
+	else
+		tgid = machine->pid;
+
 	if (tgid < 0)
 		goto out;
 
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