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authorJiri Olsa <jolsa@redhat.com>2016-12-13 08:46:22 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2016-12-15 16:25:46 -0300
commita359c17a7e1a9c99384499cf7b43d80867080789 (patch)
treebcdd0598538751a35f97e9ce3b7ff1bb7edbc231 /tools/perf/util/evsel.h
parent38af91f01de0e160c17ae380acb5bab5d51066f4 (diff)
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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/util/evsel.h')
-rw-r--r--tools/perf/util/evsel.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 6abb89cd27f9..06ef6f29efa1 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -120,6 +120,7 @@ struct perf_evsel {
bool tracking;
bool per_pkg;
bool precise_max;
+ bool ignore_missing_thread;
/* parse modifier helper */
int exclude_GH;
int nr_members;