diff options
| -rw-r--r-- | tools/perf/Documentation/perf-record.txt | 3 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 18 |
2 files changed, 18 insertions, 3 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 5a626ef666c2..3eea6de35a38 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -430,6 +430,9 @@ Configure all used events to run in user space. --timestamp-filename Append timestamp to output file name. +--timestamp-boundary:: +Record timestamp boundary (time of first/last samples). + --switch-output[=mode]:: Generate multiple perf.data files, timestamp prefixed, switching to a new one based on 'mode' value: diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 50385d89c497..65681a1a292a 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -78,6 +78,7 @@ struct record { bool no_buildid_cache_set; bool buildid_all; bool timestamp_filename; + bool timestamp_boundary; struct switch_output switch_output; unsigned long long samples; }; @@ -409,8 +410,15 @@ static int process_sample_event(struct perf_tool *tool, { struct record *rec = container_of(tool, struct record, tool); - rec->samples++; + if (rec->evlist->first_sample_time == 0) + rec->evlist->first_sample_time = sample->time; + + rec->evlist->last_sample_time = sample->time; + if (rec->buildid_all) + return 0; + + rec->samples++; return build_id__mark_dso_hit(tool, event, sample, evsel, machine); } @@ -435,9 +443,11 @@ static int process_buildids(struct record *rec) /* * If --buildid-all is given, it marks all DSO regardless of hits, - * so no need to process samples. + * so no need to process samples. But if timestamp_boundary is enabled, + * it still needs to walk on all samples to get the timestamps of + * first/last samples. */ - if (rec->buildid_all) + if (rec->buildid_all && !rec->timestamp_boundary) rec->tool.sample = NULL; return perf_session__process_events(session); @@ -1621,6 +1631,8 @@ static struct option __record_options[] = { "Record build-id of all DSOs regardless of hits"), OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, "append timestamp to output filename"), + OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, + "Record timestamp boundary (time of first/last samples)"), OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, &record.switch_output.set, "signal,size,time", "Switch output when receive SIGUSR2 or cross size,time threshold", |