diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-test.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/tools/perf/builtin-test.c b/tools/perf/builtin-test.c index 6c991529f62b..1c984342a579 100644 --- a/tools/perf/builtin-test.c +++ b/tools/perf/builtin-test.c @@ -268,24 +268,26 @@ static int test__open_syscall_event(void) int id = trace_event__id("sys_enter_open"); if (id < 0) { - pr_debug("trace_event__id(\"sys_enter_open\") "); + pr_debug("is debugfs mounted on /sys/kernel/debug?\n"); return -1; } threads = thread_map__new(-1, getpid()); if (threads == NULL) { - pr_debug("thread_map__new "); + pr_debug("thread_map__new\n"); return -1; } evsel = perf_evsel__new(PERF_TYPE_TRACEPOINT, id, 0); if (evsel == NULL) { - pr_debug("perf_evsel__new "); + pr_debug("perf_evsel__new\n"); goto out_thread_map_delete; } if (perf_evsel__open_per_thread(evsel, threads) < 0) { - pr_debug("perf_evsel__open_per_thread "); + pr_debug("failed to open counter: %s, " + "tweak /proc/sys/kernel/perf_event_paranoid?\n", + strerror(errno)); goto out_evsel_delete; } @@ -295,13 +297,15 @@ static int test__open_syscall_event(void) } if (perf_evsel__read_on_cpu(evsel, 0, 0) < 0) { - pr_debug("perf_evsel__open_read_on_cpu "); + pr_debug("perf_evsel__open_read_on_cpu\n"); goto out_close_fd; } - if (evsel->counts->cpu[0].val != nr_open_calls) - pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %Ld ", + if (evsel->counts->cpu[0].val != nr_open_calls) { + pr_debug("perf_evsel__read_on_cpu: expected to intercept %d calls, got %Ld\n", nr_open_calls, evsel->counts->cpu[0].val); + goto out_close_fd; + } err = 0; out_close_fd: |