diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 32 |
1 files changed, 27 insertions, 5 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index dddf3f01b5ab..294da725a57d 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -11,8 +11,9 @@ static char const *script_name; static char const *generate_script_lang; -static bool debug_ordering; +static bool debug_mode; static u64 last_timestamp; +static u64 nr_unordered; static int default_start_script(const char *script __unused, int argc __unused, @@ -91,13 +92,15 @@ static int process_sample_event(event_t *event, struct perf_session *session) } if (session->sample_type & PERF_SAMPLE_RAW) { - if (debug_ordering) { + if (debug_mode) { if (data.time < last_timestamp) { pr_err("Samples misordered, previous: %llu " "this: %llu\n", last_timestamp, data.time); + nr_unordered++; } last_timestamp = data.time; + return 0; } /* * FIXME: better resolve from pid from the struct trace_entry @@ -113,6 +116,15 @@ static int process_sample_event(event_t *event, struct perf_session *session) return 0; } +static u64 nr_lost; + +static int process_lost_event(event_t *event, struct perf_session *session __used) +{ + nr_lost += event->lost.lost; + + return 0; +} + static struct perf_event_ops event_ops = { .sample = process_sample_event, .comm = event__process_comm, @@ -120,6 +132,7 @@ static struct perf_event_ops event_ops = { .event_type = event__process_event_type, .tracing_data = event__process_tracing_data, .build_id = event__process_build_id, + .lost = process_lost_event, .ordered_samples = true, }; @@ -132,9 +145,18 @@ static void sig_handler(int sig __unused) static int __cmd_trace(struct perf_session *session) { + int ret; + signal(SIGINT, sig_handler); - return perf_session__process_events(session, &event_ops); + ret = perf_session__process_events(session, &event_ops); + + if (debug_mode) { + pr_err("Misordered timestamps: %llu\n", nr_unordered); + pr_err("Lost events: %llu\n", nr_lost); + } + + return ret; } struct script_spec { @@ -544,8 +566,8 @@ static const struct option options[] = { "generate perf-trace.xx script in specified language"), OPT_STRING('i', "input", &input_name, "file", "input file name"), - OPT_BOOLEAN('d', "debug-ordering", &debug_ordering, - "check that samples time ordering is monotonic"), + OPT_BOOLEAN('d', "debug-mode", &debug_mode, + "do various checks like samples ordering and lost events"), OPT_END() }; |