Mailing List Archive

Tool events are set up as software dummy events. Don't open them to
save some work and a file descriptor. The evsel's fds are initialized
to -1, so it suffices to just early return.
---
tools/perf/util/evsel.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 3536404e9447..2743d40665ff 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2005,6 +2005,11 @@ static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus,
int pid = -1, err, old_errno;
enum rlimit_action set_rlimit = NO_CHANGE;

+ if (evsel__is_tool(evsel)) {
+ /* Tool events are set up as dummy but don't need opening. */
+ return 0;
+ }
+
err = __evsel__prepare_open(evsel, cpus, threads);
if (err)
return err;
--
2.44.0.769.g3c40516874-goog