diff options
Diffstat (limited to 'tools/perf/util/pfm.c')
| -rw-r--r-- | tools/perf/util/pfm.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/tools/perf/util/pfm.c b/tools/perf/util/pfm.c index 862e4a689868..5ccfe4b64cdf 100644 --- a/tools/perf/util/pfm.c +++ b/tools/perf/util/pfm.c @@ -145,7 +145,20 @@ static bool is_libpfm_event_supported(const char *name, struct perf_cpu_map *cpu evsel->is_libpfm_event = true; - if (evsel__open(evsel, cpus, threads) < 0) + ret = evsel__open(evsel, cpus, threads); + if (ret == -EACCES) { + /* + * This happens if the paranoid value + * /proc/sys/kernel/perf_event_paranoid is set to 2 + * Re-run with exclude_kernel set; we don't do that + * by default as some ARM machines do not support it. + * + */ + evsel->core.attr.exclude_kernel = 1; + ret = evsel__open(evsel, cpus, threads); + + } + if (ret < 0) result = false; evsel__close(evsel); |