diff options
| -rw-r--r-- | tools/perf/util/evsel.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 9dc7e2d6e48a..8f5d86bd3501 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -2457,11 +2457,17 @@ int perf_evsel__open_strerror(struct perf_evsel *evsel, struct target *target, int err, char *msg, size_t size) { char sbuf[STRERR_BUFSIZE]; + int printed = 0; switch (err) { case EPERM: case EACCES: - return scnprintf(msg, size, + if (err == EPERM) + printed = scnprintf(msg, size, + "No permission to enable %s event.\n\n", + perf_evsel__name(evsel)); + + return scnprintf(msg + printed, size - printed, "You may not have permission to collect %sstats.\n\n" "Consider tweaking /proc/sys/kernel/perf_event_paranoid,\n" "which controls use of the performance events system by\n" |