Messages in this thread | | | Date | Tue, 25 Feb 2014 15:16:00 +0800 | From | xiakaixu <> | Subject | Re: A Bug Inquiry in linux/tools/perf/builtin-record.c |
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于 2014/2/19 9:48, xiakaixu 写道: > Hi all, > > There is a bug found in my work when running "perf record". The basic information > is here. As we know, perf record is a parent process and the programme traced is > a child process when running "perf record". Sometimes the child process become > zombie state and disappear until the parent process is killed. The bug stays in linux/ > tools/perf/builtin-record.c. > ********************************************************************* > static int __cmd_record(struct perf_record *rec, int argc, const char **argv) > ...... > if (hits == rec->samples) { > if (done) > break; > err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); > waking++; > } > ...... > ********************************************************************* > The parent process still call the function > poll(evsel_list->pollfd, evsel_list->nr_fds, -1) when the child process has exited > already, which caused a zombie process. > > May I have your opinion ? > Waiting for your reply! > > Best Regards > Kaixu Xia >
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