perf trace: Use sched:sched_stat_runtime to provide a thread summary
[root@sandy ~]# perf trace --sched --duration 0.100 --pid `pidof firefox`
<SNIP>
17079.847 ( 0.009 ms): 17643 poll(ufds: 140037623086496, nfds: 11, timeout_msecs: 0) = 0 Timeout
17079.892 ( 0.010 ms): 17643 read(fd: 4, buf: 140038178943092, count: 4096 ) = -1 EAGAIN Resource temporarily unavailable
17079.921 ( 0.013 ms): 17643 poll(ufds: 140037623086496, nfds: 11, timeout_msecs: 0) = 0 Timeout
17079.949 ( 0.009 ms): 17643 read(fd: 4, buf: 140038178943092, count: 4096 ) = -1 EAGAIN Resource temporarily unavailable
^C
_____________________________________________________________________
__) Summary of events (__
[ task - pid ] [ events ] [ ratio ] [ runtime ]
_____________________________________________________________________
firefox - 17643 : 18013 [ 72.2% ] 359.110 ms
firefox - 17663 : 41 [ 0.2% ] 21.439 ms
firefox - 17664 : 6840 [ 27.4% ] 133.642 ms
firefox - 17667 : 46 [ 0.2% ] 0.682 ms
[root@sandy ~]#
This is equivalent to the 'perf trace summary' subcomand in the tmp.perf/trace2
branch.
Another example, setting a huge duration filter to get just a system
wide summary:
[root@sandy ~]# perf trace --duration 10000.0 --sched
^C
_____________________________________________________________________
__) Summary of events (__
[ task - pid ] [ events ] [ ratio ] [ runtime ]
_____________________________________________________________________
scsi_eh_1 - 258 : 15 [ 0.0% ] 0.133 ms
kworker/0:1H - 322 : 13 [ 0.0% ] 0.032 ms
jbd2/dm-0-8 - 384 : 4 [ 0.0% ] 0.115 ms
flush-253:0 - 470 : 1 [ 0.0% ] 0.027 ms
firefox - 950 : 4783 [ 0.1% ] 24.863 ms
firefox - 992 : 1883 [ 0.1% ] 6.808 ms
firefox - 995 : 35 [ 0.0% ] 0.111 ms
ksoftirqd/6 - 4362 : 2 [ 0.0% ] 0.005 ms
ksoftirqd/7 - 4365 : 1 [ 0.0% ] 0.007 ms
Xorg - 4671 : 148 [ 0.0% ] 0.912 ms
gnome-settings- - 4846 : 14 [ 0.0% ] 0.086 ms
seahorse-daemon - 4847 : 14 [ 0.0% ] 0.092 ms
gnome-panel - 4875 : 46 [ 0.0% ] 0.159 ms
gnome-power-man - 4918 : 16 [ 0.0% ] 0.065 ms
gvfs-afc-volume - 4992 : 77 [ 0.0% ] 0.136 ms
gnome-screensav - 5114 : 24 [ 0.0% ] 0.128 ms
xchat - 8082 : 466 [ 0.0% ] 2.019 ms
synergyc - 8369 : 941 [ 0.0% ] 3.291 ms
synergyc - 8371 : 85 [ 0.0% ] 1.817 ms
jbd2/dm-4-8 - 9352 : 4 [ 0.0% ] 0.109 ms
rpcbind - 9786 : 3 [ 0.0% ] 0.017 ms
rtkit-daemon - 12802 : 10 [ 0.0% ] 0.038 ms
rtkit-daemon - 12803 : 8 [ 0.0% ] 0.000 ms
udisks-daemon - 13020 : 27 [ 0.0% ] 0.240 ms
kworker/7:0 - 14651 : 669 [ 0.0% ] 2.616 ms
kworker/5:1 - 16220 : 2 [ 0.0% ] 0.069 ms
kworker/4:0 - 19776 : 13 [ 0.0% ] 0.176 ms
openvpn - 20131 : 133 [ 0.0% ] 0.762 ms
plugin-containe - 20508 : 60658 [ 1.7% ] 131.153 ms
npviewer.bin - 20520 : 72208 [ 2.0% ] 138.945 ms
npviewer.bin - 20542 : 35 [ 0.0% ] 0.074 ms
npviewer.bin - 20543 : 30 [ 0.0% ] 0.074 ms
npviewer.bin - 20547 : 35 [ 0.0% ] 0.092 ms
npviewer.bin - 20552 : 35 [ 0.0% ] 0.093 ms
sshd - 20645 : 32 [ 0.0% ] 0.071 ms
npviewer.bin - 21053 : 35 [ 0.0% ] 0.074 ms
npviewer.bin - 21054 : 35 [ 0.0% ] 0.097 ms
kworker/0:2 - 21169 : 149 [ 0.0% ] 1.143 ms
kworker/3:0 - 22171 : 113 [ 0.0% ] 96.892 ms
flush-253:4 - 22410 : 1 [ 0.0% ] 0.028 ms
kworker/6:0 - 24581 : 25 [ 0.0% ] 0.275 ms
kworker/1:0 - 25572 : 4 [ 0.0% ] 0.103 ms
kworker/2:1 - 26299 : 138 [ 0.0% ] 1.440 ms
kworker/0:0 - 26325 : 1 [ 0.0% ] 0.003 ms
perf - 26330 : 3506967 [ 96.1% ] 6648.310 ms
[root@sandy ~]#
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-mzuli0srnxyi1o029py6537x@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo
Родитель
efd5745e43
Коммит
1302d88e66
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@ -51,6 +51,9 @@ 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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--sched:
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Accrue thread runtime and provide a summary at the end of the session.
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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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@ -69,6 +69,7 @@ struct thread_trace {
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bool entry_pending;
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unsigned long nr_events;
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char *entry_str;
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double runtime_ms;
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};
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static struct thread_trace *thread_trace__new(void)
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@ -109,8 +110,10 @@ struct trace {
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struct machine host;
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u64 base_time;
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unsigned long nr_events;
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bool sched;
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bool multiple_threads;
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double duration_filter;
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double runtime_ms;
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};
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static bool trace__filter_duration(struct trace *trace, double t)
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@ -389,6 +392,31 @@ out:
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return 0;
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}
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static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel,
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struct perf_sample *sample)
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{
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u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
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double runtime_ms = (double)runtime / NSEC_PER_MSEC;
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struct thread *thread = machine__findnew_thread(&trace->host, sample->tid);
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struct thread_trace *ttrace = thread__trace(thread);
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if (ttrace == NULL)
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goto out_dump;
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ttrace->runtime_ms += runtime_ms;
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trace->runtime_ms += runtime_ms;
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return 0;
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out_dump:
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printf("%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n",
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evsel->name,
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perf_evsel__strval(evsel, sample, "comm"),
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(pid_t)perf_evsel__intval(evsel, sample, "pid"),
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runtime,
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perf_evsel__intval(evsel, sample, "vruntime"));
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return 0;
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}
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static int trace__run(struct trace *trace, int argc, const char **argv)
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{
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struct perf_evlist *evlist = perf_evlist__new(NULL, NULL);
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@ -408,6 +436,13 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
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goto out_delete_evlist;
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}
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if (trace->sched &&
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perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime",
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trace__sched_stat_runtime)) {
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printf("Couldn't read the sched_stat_runtime tracepoint information!\n");
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goto out_delete_evlist;
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}
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err = perf_evlist__create_maps(evlist, &trace->opts.target);
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if (err < 0) {
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printf("Problems parsing the target to trace, check your options!\n");
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@ -521,6 +556,51 @@ out:
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return err;
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}
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static size_t trace__fprintf_threads_header(FILE *fp)
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{
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size_t printed;
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printed = fprintf(fp, "\n _____________________________________________________________________\n");
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printed += fprintf(fp," __) Summary of events (__\n\n");
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printed += fprintf(fp," [ task - pid ] [ events ] [ ratio ] [ runtime ]\n");
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printed += fprintf(fp," _____________________________________________________________________\n\n");
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return printed;
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}
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static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp)
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{
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size_t printed = trace__fprintf_threads_header(fp);
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struct rb_node *nd;
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for (nd = rb_first(&trace->host.threads); nd; nd = rb_next(nd)) {
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struct thread *thread = rb_entry(nd, struct thread, rb_node);
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struct thread_trace *ttrace = thread->priv;
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const char *color;
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double ratio;
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if (ttrace == NULL)
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continue;
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ratio = (double)ttrace->nr_events / trace->nr_events * 100.0;
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color = PERF_COLOR_NORMAL;
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if (ratio > 50.0)
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color = PERF_COLOR_RED;
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else if (ratio > 25.0)
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color = PERF_COLOR_GREEN;
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else if (ratio > 5.0)
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color = PERF_COLOR_YELLOW;
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printed += color_fprintf(fp, color, "%20s", thread->comm);
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printed += fprintf(fp, " - %-5d :%11lu [", thread->pid, ttrace->nr_events);
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printed += color_fprintf(fp, color, "%5.1f%%", ratio);
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printed += fprintf(fp, " ] %10.3f ms\n", ttrace->runtime_ms);
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}
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return printed;
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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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@ -571,6 +651,7 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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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_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"),
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OPT_END()
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};
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int err;
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@ -595,5 +676,10 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
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if (!argc && perf_target__none(&trace.opts.target))
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trace.opts.target.system_wide = true;
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return trace__run(&trace, argc, argv);
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err = trace__run(&trace, argc, argv);
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if (trace.sched && !err)
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trace__fprintf_thread_summary(&trace, stdout);
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return err;
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}
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