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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 2016-11-16 15:06:30 +09:00 committed by Arnaldo Carvalho de Melo
parent 49394a2a24
commit 52df138caa
1 changed files with 160 additions and 6 deletions
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166
tools/perf/builtin-sched.c
View File

@ -194,6 +194,11 @@ struct perf_sched {
bool force;
bool skip_merge;
struct perf_sched_map map;
/* options for timehist command */
bool summary;
bool summary_only;
u64 skipped_samples;
};
/* per thread run time data */
@ -2010,12 +2015,15 @@ static struct thread *timehist_get_thread(struct perf_sample *sample,
return thread;
}
static bool timehist_skip_sample(struct thread *thread)
static bool timehist_skip_sample(struct perf_sched *sched,
struct thread *thread)
{
bool rc = false;
if (thread__is_filtered(thread))
if (thread__is_filtered(thread)) {
rc = true;
sched->skipped_samples++;
}
return rc;
}
@ -2045,7 +2053,7 @@ static int timehist_sched_wakeup_event(struct perf_tool *tool __maybe_unused,
return 0;
}
static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
static int timehist_sched_change_event(struct perf_tool *tool,
union perf_event *event,
struct perf_evsel *evsel,
struct perf_sample *sample,
@ -2056,6 +2064,7 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
struct thread_runtime *tr = NULL;
u64 tprev;
int rc = 0;
struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
if (machine__resolve(machine, &al, sample) < 0) {
pr_err("problem processing %d event. skipping it\n",
@ -2070,7 +2079,7 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
goto out;
}
if (timehist_skip_sample(thread))
if (timehist_skip_sample(sched, thread))
goto out;
tr = thread__get_runtime(thread);
@ -2082,7 +2091,8 @@ static int timehist_sched_change_event(struct perf_tool *tool __maybe_unused,
tprev = perf_evsel__get_time(evsel, sample->cpu);
timehist_update_runtime_stats(tr, sample->time, tprev);
timehist_print_sample(sample, thread);
if (!sched->summary_only)
timehist_print_sample(sample, thread);
out:
if (tr) {
@ -2122,6 +2132,131 @@ static int process_lost(struct perf_tool *tool __maybe_unused,
}
static void print_thread_runtime(struct thread *t,
struct thread_runtime *r)
{
double mean = avg_stats(&r->run_stats);
float stddev;
printf("%*s %5d %9" PRIu64 " ",
comm_width, timehist_get_commstr(t), t->ppid,
(u64) r->run_stats.n);
print_sched_time(r->total_run_time, 8);
stddev = rel_stddev_stats(stddev_stats(&r->run_stats), mean);
print_sched_time(r->run_stats.min, 6);
printf(" ");
print_sched_time((u64) mean, 6);
printf(" ");
print_sched_time(r->run_stats.max, 6);
printf(" ");
printf("%5.2f", stddev);
printf("\n");
}
struct total_run_stats {
u64 sched_count;
u64 task_count;
u64 total_run_time;
};
static int __show_thread_runtime(struct thread *t, void *priv)
{
struct total_run_stats *stats = priv;
struct thread_runtime *r;
if (thread__is_filtered(t))
return 0;
r = thread__priv(t);
if (r && r->run_stats.n) {
stats->task_count++;
stats->sched_count += r->run_stats.n;
stats->total_run_time += r->total_run_time;
print_thread_runtime(t, r);
}
return 0;
}
static int show_thread_runtime(struct thread *t, void *priv)
{
if (t->dead)
return 0;
return __show_thread_runtime(t, priv);
}
static int show_deadthread_runtime(struct thread *t, void *priv)
{
if (!t->dead)
return 0;
return __show_thread_runtime(t, priv);
}
static void timehist_print_summary(struct perf_sched *sched,
struct perf_session *session)
{
struct machine *m = &session->machines.host;
struct total_run_stats totals;
u64 task_count;
struct thread *t;
struct thread_runtime *r;
int i;
memset(&totals, 0, sizeof(totals));
if (comm_width < 30)
comm_width = 30;
printf("\nRuntime summary\n");
printf("%*s parent sched-in ", comm_width, "comm");
printf(" run-time min-run avg-run max-run stddev\n");
printf("%*s (count) ", comm_width, "");
printf(" (msec) (msec) (msec) (msec) %%\n");
printf("%.105s\n", graph_dotted_line);
machine__for_each_thread(m, show_thread_runtime, &totals);
task_count = totals.task_count;
if (!task_count)
printf("<no still running tasks>\n");
printf("\nTerminated tasks:\n");
machine__for_each_thread(m, show_deadthread_runtime, &totals);
if (task_count == totals.task_count)
printf("<no terminated tasks>\n");
/* CPU idle stats not tracked when samples were skipped */
if (sched->skipped_samples)
return;
printf("\nIdle stats:\n");
for (i = 0; i <= idle_max_cpu; ++i) {
t = idle_threads[i];
if (!t)
continue;
r = thread__priv(t);
if (r && r->run_stats.n) {
totals.sched_count += r->run_stats.n;
printf(" CPU %2d idle for ", i);
print_sched_time(r->total_run_time, 6);
printf(" msec\n");
} else
printf(" CPU %2d idle entire time window\n", i);
}
printf("\n"
" Total number of unique tasks: %" PRIu64 "\n"
"Total number of context switches: %" PRIu64 "\n"
" Total run time (msec): ",
totals.task_count, totals.sched_count);
print_sched_time(totals.total_run_time, 2);
printf("\n");
}
typedef int (*sched_handler)(struct perf_tool *tool,
union perf_event *event,
struct perf_evsel *evsel,
@ -2163,6 +2298,7 @@ static int perf_sched__timehist(struct perf_sched *sched)
};
struct perf_session *session;
struct perf_evlist *evlist;
int err = -1;
/*
@ -2185,6 +2321,8 @@ static int perf_sched__timehist(struct perf_sched *sched)
if (session == NULL)
return -ENOMEM;
evlist = session->evlist;
symbol__init(&session->header.env);
setup_pager();
@ -2203,7 +2341,12 @@ static int perf_sched__timehist(struct perf_sched *sched)
if (init_idle_threads(sched->max_cpu))
goto out;
timehist_header();
/* summary_only implies summary option, but don't overwrite summary if set */
if (sched->summary_only)
sched->summary = sched->summary_only;
if (!sched->summary_only)
timehist_header();
err = perf_session__process_events(session);
if (err) {
@ -2211,6 +2354,13 @@ static int perf_sched__timehist(struct perf_sched *sched)
goto out;
}
sched->nr_events = evlist->stats.nr_events[0];
sched->nr_lost_events = evlist->stats.total_lost;
sched->nr_lost_chunks = evlist->stats.nr_events[PERF_RECORD_LOST];
if (sched->summary)
timehist_print_summary(sched, session);
out:
free_idle_threads();
perf_session__delete(session);
@ -2569,6 +2719,10 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
"file", "kallsyms pathname"),
OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
"Look for files with symbols relative to this directory"),
OPT_BOOLEAN('s', "summary", &sched.summary_only,
"Show only syscall summary with statistics"),
OPT_BOOLEAN('S', "with-summary", &sched.summary,
"Show all syscalls and summary with statistics"),
OPT_PARENT(sched_options)
};