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perf stat: Factor out event handling loop into dispatch_events()

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Consolidate event dispatching loops for fork, attach and system wide
monitoring use cases into common dispatch_events() function.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/8a900bd5-200a-9b0f-7154-80a2343bfd1a@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov 2020-07-17 10:04:02 +03:00 committed by Arnaldo Carvalho de Melo
parent b0ce0c8df4
commit 987b823813
1 changed files with 24 additions and 12 deletions
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36
tools/perf/builtin-stat.c
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@ -550,6 +550,27 @@ static bool is_target_alive(struct target *_target,
return false;
}
static int dispatch_events(bool forks, int timeout, int interval, int *times, struct timespec *ts)
{
int child_exited = 0, status = 0;
while (!done) {
if (forks)
child_exited = waitpid(child_pid, &status, WNOHANG);
else
child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
if (child_exited)
break;
nanosleep(ts, NULL);
if (timeout || handle_interval(interval, times))
break;
}
return status;
}
enum counter_recovery {
COUNTER_SKIP,
COUNTER_RETRY,
@ -789,13 +810,8 @@ try_again_reset:
perf_evlist__start_workload(evsel_list);
enable_counters();
if (interval || timeout) {
while (!waitpid(child_pid, &status, WNOHANG)) {
nanosleep(&ts, NULL);
if (timeout || handle_interval(interval, &times))
break;
}
}
if (interval || timeout)
status = dispatch_events(forks, timeout, interval, &times, &ts);
if (child_pid != -1) {
if (timeout)
kill(child_pid, SIGTERM);
@ -812,11 +828,7 @@ try_again_reset:
psignal(WTERMSIG(status), argv[0]);
} else {
enable_counters();
while (!done && is_target_alive(&target, evsel_list->core.threads)) {
nanosleep(&ts, NULL);
if (timeout || handle_interval(interval, &times))
break;
}
status = dispatch_events(forks, timeout, interval, &times, &ts);
}
disable_counters();