diff options
Diffstat (limited to 'tools/perf/builtin-trace.c')
| -rw-r--r-- | tools/perf/builtin-trace.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index 2eefb33c967..77f556f7604 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -11,6 +11,8 @@ static char const *script_name; static char const *generate_script_lang; +static bool debug_ordering; +static u64 last_timestamp; static int default_start_script(const char *script __unused, int argc __unused, @@ -87,6 +89,14 @@ static int process_sample_event(event_t *event, struct perf_session *session) } if (session->sample_type & PERF_SAMPLE_RAW) { + if (debug_ordering) { + if (data.time < last_timestamp) { + pr_err("Samples misordered, previous: %llu " + "this: %llu\n", last_timestamp, + data.time); + } + last_timestamp = data.time; + } /* * FIXME: better resolve from pid from the struct trace_entry * field, although it should be the same than this perf @@ -108,6 +118,7 @@ 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, + .ordered_samples = true, }; extern volatile int session_done; @@ -531,6 +542,8 @@ 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_END() }; |