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| author |   Jiri Olsa <jolsa@kernel.org> | 2018-10-22 11:30:15 +0200 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2018-10-22 12:37:52 -0300 |
| commit | cbb5df7e96070f1f728ff7885443646ebba703d4 (patch) | |
| tree | 3ec4f0e283f73e5ceb043b77daf7e0a64928a4ef /tools/perf/builtin-stat.c | |
| parent | perf trace: Drop thread refcount in trace__event_handler() (diff) | |
| download | wireguard-linux-cbb5df7e96070f1f728ff7885443646ebba703d4.tar.xz wireguard-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 'tools/perf/builtin-stat.c')
| -rw-r--r-- | tools/perf/builtin-stat.c | 24 |
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) { |