diff options
| -rw-r--r-- | tools/perf/Documentation/perf-trace.txt | 3 | ||||
| -rw-r--r-- | tools/perf/builtin-trace.c | 32 |
2 files changed, 31 insertions, 4 deletions
diff --git a/tools/perf/Documentation/perf-trace.txt b/tools/perf/Documentation/perf-trace.txt index 3a2ae37..38d4b68 100644 --- a/tools/perf/Documentation/perf-trace.txt +++ b/tools/perf/Documentation/perf-trace.txt @@ -48,6 +48,9 @@ comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0- In per-thread mode with inheritance mode on (default), Events are captured only when the thread executes on the designated CPUs. Default is to monitor all CPUs. +--duration: + Show only events that had a duration greater than N.M ms. + SEE ALSO -------- linkperf:perf-record[1], linkperf:perf-script[1] diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c index ddb6e37..82ffa6c 100644 --- a/tools/perf/builtin-trace.c +++ b/tools/perf/builtin-trace.c @@ -100,8 +100,14 @@ struct trace { struct machine host; u64 base_time; bool multiple_threads; + double duration_filter; }; +static bool trace__filter_duration(struct trace *trace, double t) +{ + return t < (trace->duration_filter * NSEC_PER_MSEC); +} + static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) { double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; @@ -307,8 +313,10 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args); if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) { - trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout); - printf("%-70s\n", ttrace->entry_str); + if (!trace->duration_filter) { + trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout); + printf("%-70s\n", ttrace->entry_str); + } } else ttrace->entry_pending = true; @@ -333,8 +341,12 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, ttrace->exit_time = sample->time; - if (ttrace->entry_time) + if (ttrace->entry_time) { duration = sample->time - ttrace->entry_time; + if (trace__filter_duration(trace, duration)) + goto out; + } else if (trace->duration_filter) + goto out; trace__fprintf_entry_head(trace, thread, duration, sample->time, stdout); @@ -358,7 +370,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, printf(") = %d", ret); putchar('\n'); - +out: ttrace->entry_pending = false; return 0; @@ -495,6 +507,15 @@ out: return err; } +static int trace__set_duration(const struct option *opt, const char *str, + int unset __maybe_unused) +{ + struct trace *trace = opt->value; + + trace->duration_filter = atof(str); + return 0; +} + int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) { const char * const trace_usage[] = { @@ -533,6 +554,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused) "number of mmap data pages"), OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user", "user to profile"), + OPT_CALLBACK(0, "duration", &trace, "float", + "show only events with duration > N.M ms", + trace__set_duration), OPT_END() }; int err; |