linux-kernel - [PATCH 5/7] perf tools: Do not synthesize the treads of default guest.

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Message-Id: <e9ddb5dac6f963169657218b12ceb3c2030f54e8.1387572416.git.yangds.fnst@cn.fujitsu.com>
Date:	Fri, 20 Dec 2013 15:53:00 -0500
From:	Dongsheng Yang <yangds.fnst@...fujitsu.com>
To:	acme@...stprotocols.net, linux-kernel@...r.kernel.org
Cc:	mingo@...nel.org, namhyung.kim@....com, jolsa@...hat.com,
	dsahern@...il.com, Dongsheng Yang <yangds.fnst@...fujitsu.com>
Subject: [PATCH 5/7] perf tools: Do not synthesize the treads of default guest.

As the default guest is designed to handle orphan kernel symboles
with --guestkallsysms and --guestmoudles, it has no user space. So we
should skip synthesizing threads if machine is default guest.

Signed-off-by: Dongsheng Yang <yangds.fnst@...fujitsu.com>
---
 tools/perf/util/event.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 93c6701..598b73e 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -133,6 +133,9 @@ static pid_t perf_event__synthesize_comm(struct perf_tool *tool,
 		goto out;
 	}
 
+	if (machine__is_default_guest(machine))
+		return 0;
+
 	snprintf(filename, sizeof(filename), "%s/proc/%d/task",
 		 machine->root_dir, pid);
 
@@ -183,6 +186,9 @@ static int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 	FILE *fp;
 	int rc = 0;
 
+	if (machine__is_default_guest(machine))
+		return 0;
+
 	snprintf(filename, sizeof(filename), "%s/proc/%d/maps",
 		 machine->root_dir, pid);
 
@@ -409,6 +415,9 @@ int perf_event__synthesize_threads(struct perf_tool *tool,
 	if (mmap_event == NULL)
 		goto out_free_comm;
 
+	if (machine__is_default_guest(machine))
+		return 0;
+
 	snprintf(proc_path, sizeof(proc_path), "%s/proc", machine->root_dir);
 	proc = opendir(proc_path);
 
-- 
1.8.2.1

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