If the child process exited between the following code,
the child process will keep zomible status and perf process
will keep "poll" forever
if (done || draining)
break;
---//child process exit, done to 1
err = perf_evlist__poll(rec->evlist,-1);
so, change timeout to 1 second.
---
tools/perf/builtin-record.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index c3efdfb..0b242eb 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -486,7 +486,9 @@ static int __cmd_record(struct record *rec, int argc, const
char **argv)
if (hits == rec->samples) {
if (done || draining)
break;
- err = perf_evlist__poll(rec->evlist, -1);
+ do{
+ err = perf_evlist__poll(rec->evlist, 1000);
+ }while((0 == err) && !done);
/*
* Propagate error, only if there's any. Ignore positive
* number of returned events and interrupt error.
--
1.7.9.5
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