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authorJiri Olsa <jolsa@kernel.org>2018-10-22 11:30:15 +0200
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-10-22 17:37:52 +0200
commitcbb5df7e96070f1f728ff7885443646ebba703d4 (patch)
tree3ec4f0e283f73e5ceb043b77daf7e0a64928a4ef /tools/perf/builtin-stat.c
parentperf trace: Drop thread refcount in trace__event_handler() (diff)
downloadlinux-cbb5df7e96070f1f728ff7885443646ebba703d4.tar.xz
linux-cbb5df7e96070f1f728ff7885443646ebba703d4.zip
perf stat: Poll for monitored tasks being alive
Adding the check for tasks we monitor via -p/-t options, and finish stat if there's no longer task to monitor. Requested-by: Stephane Eranian <eranian@google.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lkml.kernel.org/r/20181022093015.9106-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to '')
-rw-r--r--tools/perf/builtin-stat.c24
1 files changed, 24 insertions, 0 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index b86aba1c8028..d1028d7755bb 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -409,6 +409,28 @@ static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel)
return leader;
}
+static bool is_target_alive(struct target *_target,
+ struct thread_map *threads)
+{
+ struct stat st;
+ int i;
+
+ if (!target__has_task(_target))
+ return true;
+
+ for (i = 0; i < threads->nr; i++) {
+ char path[PATH_MAX];
+
+ scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
+ threads->map[i].pid);
+
+ if (!stat(path, &st))
+ return true;
+ }
+
+ return false;
+}
+
static int __run_perf_stat(int argc, const char **argv, int run_idx)
{
int interval = stat_config.interval;
@@ -579,6 +601,8 @@ try_again:
enable_counters();
while (!done) {
nanosleep(&ts, NULL);
+ if (!is_target_alive(&target, evsel_list->threads))
+ break;
if (timeout)
break;
if (interval) {