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| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-03-27 10:34:49 -0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-04-01 12:22:34 -0300 |
| commit | 1c6763cb9962d6d83a8470934c20ed525ef62355 (patch) | |
| tree | 51e70bc73488fdfd53a115545e8f74583b8b8a85 /tools | |
| parent | 62667746a6ded2a1fc8dac2e6258f46150b5e46c (diff) | |
| download | lwn-1c6763cb9962d6d83a8470934c20ed525ef62355.tar.gz lwn-1c6763cb9962d6d83a8470934c20ed525ef62355.zip | |
Revert "perf sched: Handle PERF_RECORD_EXIT events"
This reverts commit 0439539f72ea222fbfe511b47318b9c1815a7108.
This caused this segfault:
[root@sandy linux]# perf sched rec
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.306 MB perf.data (~57062 samples) ]
perf
[root@sandy linux]# perf sched lat
perf: builtin-sched.c:781: thread_atoms_search: Assertion `!(thread != atoms->thread)' failed.
Aborted (core dumped)
[root@sandy linux]#
Further investigation is needed to check that even with machine__remove_thread()
not really deleting the thread referenced in the PERF_RECORD_EXIT (it goes to
machine->dead_threads, because references may still exist to them in things like
hist, etc) some event later comes for this dead thread and then
machine__findnew_thread() will create a new thead instance that will not be the
same as the one referenced by work_atoms->thread in thread_atoms_search().
For now just revert this patch to get the 'perf sched lat' back working.
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
echo Link: http://lkml.kernel.org/n/tip-`ranpwd -l 24`@git.kernel.org
Link: http://lkml.kernel.org/n/tip-hg4s6e5txiwqe00h8rdg1sin@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-sched.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 138229439a93..2da2a6ca22bf 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -1671,7 +1671,6 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused) .sample = perf_sched__process_tracepoint_sample, .comm = perf_event__process_comm, .lost = perf_event__process_lost, - .exit = perf_event__process_exit, .fork = perf_event__process_fork, .ordered_samples = true, }, |