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authorDongsheng Yang <yangds.fnst@cn.fujitsu.com>2013-12-20 15:53:00 -0500
committerArnaldo Carvalho de Melo <acme@redhat.com>2013-12-23 16:49:51 -0300
commitc239c25a82808ad2cbc795b69e621c4c24f154d6 (patch)
tree11ed53250b4467fd2aa8d72317144e76437ff439
parentf5db57c4c47f3985dfc677152e25636a3401fa13 (diff)
downloadlinux-c239c25a82808ad2cbc795b69e621c4c24f154d6.tar.gz
perf tools: Do not synthesize the treads of default guest.
As the default guest is designed to handle orphan kernel symboles with --guestkallsysms and --guestmodules, it has no user space. So we should skip synthesizing threads if machine is default guest. Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com> Cc: David Ahern <dsahern@gmail.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Link: http://lkml.kernel.org/r/e9ddb5dac6f963169657218b12ceb3c2030f54e8.1387572416.git.yangds.fnst@cn.fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
-rw-r--r--tools/perf/util/event.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 2905771a1f49..45a76c69a9ed 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);