diff options
| -rw-r--r-- | tools/perf/tests/sw-clock.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c index ed777728dfe..93a7139ff5f 100644 --- a/tools/perf/tests/sw-clock.c +++ b/tools/perf/tests/sw-clock.c @@ -34,7 +34,7 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id) .freq = 1, }; - attr.sample_freq = 10000; + attr.sample_freq = 500; evlist = perf_evlist__new(); if (evlist == NULL) { @@ -58,8 +58,11 @@ static int __test__sw_clock_freq(enum perf_sw_ids clock_id) } if (perf_evlist__open(evlist)) { + const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate"; + err = -errno; - pr_debug("Couldn't open evlist: %s\n", strerror(errno)); + pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n", + strerror(errno), knob, (u64)attr.sample_freq); goto out_delete_maps; } |