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| author | Jiri Olsa <jolsa@redhat.com> | 2016-12-13 08:46:22 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-12-15 16:25:46 -0300 |
| commit | a359c17a7e1a9c99384499cf7b43d80867080789 (patch) | |
| tree | bcdd0598538751a35f97e9ce3b7ff1bb7edbc231 /tools/perf/perf.h | |
| parent | 38af91f01de0e160c17ae380acb5bab5d51066f4 (diff) | |
| download | linux-a359c17a7e1a9c99384499cf7b43d80867080789.tar.bz2 | |
perf evsel: Allow to ignore missing pid
Adding perf_evsel::ignore_missing_cpu_thread bool.
When set true, it allows perf to ignore error of missing pid of perf
event syscall.
We remove missing thread id from the thread_map, so the rest of the
processing like ioctl and mmap won't get disturbed with -1 fd.
The reason for supporting this is to ease up monitoring group of pids,
that 'disappear' before perf opens their event. This currently leads
perf to report error and exit and makes perf record's -u option unusable
under certain setup.
With this change we will allow this race and ignore such failure with
following warning:
WARNING: Ignored open failure for pid 8605
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20161213074622.GA3084@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/perf.h')
| -rw-r--r-- | tools/perf/perf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/perf.h b/tools/perf/perf.h index 9a0236a4cf95..1c27d947c2fe 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -55,6 +55,7 @@ struct record_opts { bool all_user; bool tail_synthesize; bool overwrite; + bool ignore_missing_thread; unsigned int freq; unsigned int mmap_pages; unsigned int auxtrace_mmap_pages; |