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perf stat: Fail softly on unsupported events
David Ahern reported this perf stat failure: > # /tmp/build-perf/perf stat -- sleep 1 > Error: stalled-cycles-frontend event is not supported. > Fatal: Not all events could be opened. > > This is a Dell R410 with an E5620 processor. Fail in a softer fashion on unknown/unsupported events. Reported-by: David Ahern <dsahern@gmail.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Link: http://lkml.kernel.org/n/tip-7y40wib8n006io7hjpn1dsrm@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
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1 changed files with 1 additions and 3 deletions
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@ -377,7 +377,7 @@ static int run_perf_stat(int argc __used, const char **argv)
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list_for_each_entry(counter, &evsel_list->entries, node) {
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if (create_perf_stat_counter(counter) < 0) {
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if (errno == EINVAL || errno == ENOSYS)
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if (errno == EINVAL || errno == ENOSYS || errno == ENOENT)
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continue;
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if (errno == EPERM || errno == EACCES) {
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@ -385,8 +385,6 @@ static int run_perf_stat(int argc __used, const char **argv)
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"\t Consider tweaking"
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" /proc/sys/kernel/perf_event_paranoid or running as root.",
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system_wide ? "system-wide " : "");
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} else if (errno == ENOENT) {
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error("%s event is not supported. ", event_name(counter));
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} else {
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error("open_counter returned with %d (%s). "
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"/bin/dmesg may provide additional information.\n",
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