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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>
This commit is contained in:
Dongsheng Yang 2013-12-20 15:53:00 -05:00 committed by Arnaldo Carvalho de Melo
parent f5db57c4c4
commit c239c25a82
1 changed files with 9 additions and 0 deletions
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9
tools/perf/util/event.c
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@ -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);