perf trace: Add duration filter
Example: [acme@sandy linux]$ perf trace --duration 0.025 usleep 1 2.221 ( 0.958 ms): 6724 execve(arg0: 140733557168278, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = -2 3.690 ( 1.443 ms): 6724 execve(arg0: 140733557168295, arg1: 140733557178768, arg2: 16134304, arg3: 140733557167840, arg4: 7955998171588342573, arg5: 6723) = 0 3.979 ( 0.048 ms): 6724 open(filename: 208733843841, flags: 0, mode: 1 ) = 3 4.071 ( 0.075 ms): 6724 open(filename: 139744419925673, flags: 0, mode: 0 ) = 3 4.318 ( 0.056 ms): 6724 nanosleep(rqtp: 140734030404608, rmtp: 0 ) = 0 [acme@sandy linux]$ perf trace --duration 0.100 usleep 1 1.143 ( 1.021 ms): 6726 execve(arg0: 140736323962279, arg1: 140736323972752, arg2: 34926752, arg3: 140736323961824, arg4: 7955998171588342573, arg5: 6725) = 0 [acme@sandy linux]$ Cherry picked from tmp.perf/trace2 branch. Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/n/tip-oslw2j2958we9qf0ctra4whd@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
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60c907abc6
commit
ae9ed03579
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@ -48,6 +48,9 @@ comma-separated list with no space: 0,1. Ranges of CPUs are specified with -: 0-
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In per-thread mode with inheritance mode on (default), Events are captured only when
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the thread executes on the designated CPUs. Default is to monitor all CPUs.
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--duration:
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Show only events that had a duration greater than N.M ms.
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SEE ALSO
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--------
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linkperf:perf-record[1], linkperf:perf-script[1]
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@ -100,8 +100,14 @@ struct trace {
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struct machine host;
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u64 base_time;
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bool multiple_threads;
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double duration_filter;
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};
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static bool trace__filter_duration(struct trace *trace, double t)
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{
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return t < (trace->duration_filter * NSEC_PER_MSEC);
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}
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static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp)
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{
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double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC;
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@ -307,8 +313,10 @@ static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel,
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printed += syscall__scnprintf_args(sc, msg + printed, 1024 - printed, args);
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if (!strcmp(sc->name, "exit_group") || !strcmp(sc->name, "exit")) {
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trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
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printf("%-70s\n", ttrace->entry_str);
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if (!trace->duration_filter) {
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trace__fprintf_entry_head(trace, thread, 1, sample->time, stdout);
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printf("%-70s\n", ttrace->entry_str);
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}
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} else
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ttrace->entry_pending = true;
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@ -333,8 +341,12 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
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ttrace->exit_time = sample->time;
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if (ttrace->entry_time)
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if (ttrace->entry_time) {
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duration = sample->time - ttrace->entry_time;
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if (trace__filter_duration(trace, duration))
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goto out;
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} else if (trace->duration_filter)
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goto out;
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trace__fprintf_entry_head(trace, thread, duration, sample->time, stdout);
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@ -358,7 +370,7 @@ static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel,
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printf(") = %d", ret);
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putchar('\n');
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out:
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ttrace->entry_pending = false;
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return 0;
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@ -495,6 +507,15 @@ out:
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return err;
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}
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static int trace__set_duration(const struct option *opt, const char *str,
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int unset __maybe_unused)
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{
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struct trace *trace = opt->value;
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trace->duration_filter = atof(str);
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return 0;
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}
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int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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const char * const trace_usage[] = {
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@ -533,6 +554,9 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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"number of mmap data pages"),
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OPT_STRING(0, "uid", &trace.opts.target.uid_str, "user",
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"user to profile"),
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OPT_CALLBACK(0, "duration", &trace, "float",
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"show only events with duration > N.M ms",
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trace__set_duration),
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OPT_END()
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};
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int err;
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