perf sched timehist: Add summary options
The -s/--summary option is to show process runtime statistics. And the
-S/--with-summary option is to show the stats with the normal output.
$ perf sched timehist -s
Runtime summary
comm parent sched-in run-time min-run avg-run max-run stddev
(count) (msec) (msec) (msec) (msec) %
---------------------------------------------------------------------------------------------------------
ksoftirqd/0[3] 2 2 0.011 0.004 0.005 0.006 14.87
rcu_preempt[7] 2 11 0.071 0.002 0.006 0.017 20.23
watchdog/0[11] 2 1 0.002 0.002 0.002 0.002 0.00
watchdog/1[12] 2 1 0.004 0.004 0.004 0.004 0.00
...
Terminated tasks:
sleep[7220] 7219 3 0.770 0.087 0.256 0.576 62.28
Idle stats:
CPU 0 idle for 2352.006 msec
CPU 1 idle for 2764.497 msec
CPU 2 idle for 2998.229 msec
CPU 3 idle for 2967.800 msec
Total number of unique tasks: 52
Total number of context switches: 2532
Total run time (msec): 218.036
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/20161116060634.28477-5-namhyung@kernel.org
[ Add documentation from last commit, so that docs comes with the cset that introduces the feature ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Ahern
Arnaldo Carvalho de Melo
Родитель
49394a2a24
Коммит
52df138caa
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@ -194,6 +194,11 @@ struct perf_sched {
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bool force;
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bool skip_merge;
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struct perf_sched_map map;
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/* options for timehist command */
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bool summary;
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bool summary_only;
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u64 skipped_samples;
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};
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/* per thread run time data */
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@ -2010,12 +2015,15 @@ static struct thread *timehist_get_thread(struct perf_sample *sample,
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return thread;
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}
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static bool timehist_skip_sample(struct thread *thread)
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static bool timehist_skip_sample(struct perf_sched *sched,
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struct thread *thread)
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{
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bool rc = false;
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if (thread__is_filtered(thread))
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if (thread__is_filtered(thread)) {
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rc = true;
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sched->skipped_samples++;
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}
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return rc;
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}
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@ -2045,7 +2053,7 @@ static int timehist_sched_wakeup_event(struct perf_tool *tool __maybe_unused,
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return 0;
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}
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static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
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static int timehist_sched_change_event(struct perf_tool *tool,
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union perf_event *event,
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struct perf_evsel *evsel,
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struct perf_sample *sample,
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@ -2056,6 +2064,7 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
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struct thread_runtime *tr = NULL;
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u64 tprev;
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int rc = 0;
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struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
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if (machine__resolve(machine, &al, sample) < 0) {
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pr_err("problem processing %d event. skipping it\n",
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@ -2070,7 +2079,7 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
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goto out;
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}
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if (timehist_skip_sample(thread))
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if (timehist_skip_sample(sched, thread))
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goto out;
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tr = thread__get_runtime(thread);
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@ -2082,7 +2091,8 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
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tprev = perf_evsel__get_time(evsel, sample->cpu);
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timehist_update_runtime_stats(tr, sample->time, tprev);
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timehist_print_sample(sample, thread);
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if (!sched->summary_only)
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timehist_print_sample(sample, thread);
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out:
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if (tr) {
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@ -2122,6 +2132,131 @@ static int process_lost(struct perf_tool *tool __maybe_unused,
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}
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static void print_thread_runtime(struct thread *t,
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struct thread_runtime *r)
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{
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double mean = avg_stats(&r->run_stats);
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float stddev;
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printf("%*s %5d %9" PRIu64 " ",
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comm_width, timehist_get_commstr(t), t->ppid,
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(u64) r->run_stats.n);
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print_sched_time(r->total_run_time, 8);
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stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
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print_sched_time(r->run_stats.min, 6);
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printf(" ");
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print_sched_time((u64) mean, 6);
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printf(" ");
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print_sched_time(r->run_stats.max, 6);
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printf(" ");
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printf("%5.2f", stddev);
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printf("\n");
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}
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struct total_run_stats {
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u64 sched_count;
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u64 task_count;
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u64 total_run_time;
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};
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static int __show_thread_runtime(struct thread *t, void *priv)
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{
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struct total_run_stats *stats = priv;
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struct thread_runtime *r;
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if (thread__is_filtered(t))
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return 0;
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r = thread__priv(t);
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if (r && r->run_stats.n) {
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stats->task_count++;
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stats->sched_count += r->run_stats.n;
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stats->total_run_time += r->total_run_time;
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print_thread_runtime(t, r);
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}
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return 0;
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}
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static int show_thread_runtime(struct thread *t, void *priv)
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{
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if (t->dead)
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return 0;
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return __show_thread_runtime(t, priv);
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}
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static int show_deadthread_runtime(struct thread *t, void *priv)
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{
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if (!t->dead)
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return 0;
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return __show_thread_runtime(t, priv);
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}
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static void timehist_print_summary(struct perf_sched *sched,
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struct perf_session *session)
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{
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struct machine *m = &session->machines.host;
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struct total_run_stats totals;
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u64 task_count;
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struct thread *t;
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struct thread_runtime *r;
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int i;
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memset(&totals, 0, sizeof(totals));
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if (comm_width < 30)
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comm_width = 30;
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printf("\nRuntime summary\n");
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printf("%*s parent sched-in ", comm_width, "comm");
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printf(" run-time min-run avg-run max-run stddev\n");
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printf("%*s (count) ", comm_width, "");
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printf(" (msec) (msec) (msec) (msec) %%\n");
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printf("%.105s\n", graph_dotted_line);
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machine__for_each_thread(m, show_thread_runtime, &totals);
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task_count = totals.task_count;
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if (!task_count)
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printf("<no still running tasks>\n");
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printf("\nTerminated tasks:\n");
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machine__for_each_thread(m, show_deadthread_runtime, &totals);
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if (task_count == totals.task_count)
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printf("<no terminated tasks>\n");
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/* CPU idle stats not tracked when samples were skipped */
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if (sched->skipped_samples)
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return;
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printf("\nIdle stats:\n");
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for (i = 0; i <= idle_max_cpu; ++i) {
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t = idle_threads[i];
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if (!t)
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continue;
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r = thread__priv(t);
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if (r && r->run_stats.n) {
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totals.sched_count += r->run_stats.n;
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printf(" CPU %2d idle for ", i);
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print_sched_time(r->total_run_time, 6);
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printf(" msec\n");
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} else
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printf(" CPU %2d idle entire time window\n", i);
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}
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printf("\n"
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" Total number of unique tasks: %" PRIu64 "\n"
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"Total number of context switches: %" PRIu64 "\n"
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" Total run time (msec): ",
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totals.task_count, totals.sched_count);
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print_sched_time(totals.total_run_time, 2);
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printf("\n");
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}
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typedef int (*sched_handler)(struct perf_tool *tool,
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union perf_event *event,
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struct perf_evsel *evsel,
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@ -2163,6 +2298,7 @@ static int perf_sched__timehist(struct perf_sched *sched)
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};
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struct perf_session *session;
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struct perf_evlist *evlist;
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int err = -1;
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/*
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@ -2185,6 +2321,8 @@ static int perf_sched__timehist(struct perf_sched *sched)
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if (session == NULL)
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return -ENOMEM;
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evlist = session->evlist;
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symbol__init(&session->header.env);
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setup_pager();
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@ -2203,7 +2341,12 @@ static int perf_sched__timehist(struct perf_sched *sched)
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if (init_idle_threads(sched->max_cpu))
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goto out;
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timehist_header();
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/* summary_only implies summary option, but don't overwrite summary if set */
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if (sched->summary_only)
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sched->summary = sched->summary_only;
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if (!sched->summary_only)
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timehist_header();
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err = perf_session__process_events(session);
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if (err) {
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@ -2211,6 +2354,13 @@ static int perf_sched__timehist(struct perf_sched *sched)
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goto out;
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}
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sched->nr_events = evlist->stats.nr_events[0];
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sched->nr_lost_events = evlist->stats.total_lost;
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sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
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if (sched->summary)
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timehist_print_summary(sched, session);
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out:
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free_idle_threads();
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perf_session__delete(session);
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@ -2569,6 +2719,10 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
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"file", "kallsyms pathname"),
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OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
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"Look for files with symbols relative to this directory"),
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OPT_BOOLEAN('s', "summary", &sched.summary_only,
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"Show only syscall summary with statistics"),
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OPT_BOOLEAN('S', "with-summary", &sched.summary,
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"Show all syscalls and summary with statistics"),
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OPT_PARENT(sched_options)
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};
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