Messages in this thread | | | Date | Tue, 22 Nov 2016 15:33:26 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH v2 7/8] perf sched timehist: Add -V/--cpu-visual option |
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Em Wed, Nov 16, 2016 at 03:06:33PM +0900, Namhyung Kim escreveu: > From: David Ahern <dsahern@gmail.com> > > The -V option provides a visual aid for sched switches by cpu: > > $ perf sched timehist -V > time cpu 0123456789abc task name b/n time sch delay run time > [tid/pid] (msec) (msec) (msec) > --------------- ------ ------------- -------------------- --------- --------- --------- > ... > 2412598.429696 [0009] i <idle> 0.000 0.000 0.000 > 2412598.429767 [0002] s perf[7219] 0.000 0.000 0.000 > 2412598.429783 [0009] s perf[7220] 0.000 0.006 0.087 > 2412598.429794 [0010] i <idle> 0.000 0.000 0.000 > 2412598.429795 [0009] s migration/9[53] 0.000 0.003 0.011 > 2412598.430370 [0010] s sleep[7220] 0.011 0.000 0.576 > 2412598.432584 [0003] i <idle> 0.000 0.000 0.000 > ...
Forgot to add docs, will do.
- Arnaldo
> Signed-off-by: David Ahern <dsahern@gmail.com> > Signed-off-by: Namhyung Kim <namhyung@kernel.org> > --- > tools/perf/builtin-sched.c | 44 ++++++++++++++++++++++++++++++++++++++++++-- > 1 file changed, 42 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c > index 1f8731640809..829468defa07 100644 > --- a/tools/perf/builtin-sched.c > +++ b/tools/perf/builtin-sched.c > @@ -201,6 +201,7 @@ struct perf_sched { > bool summary_only; > bool show_callchain; > unsigned int max_stack; > + bool show_cpu_visual; > bool show_wakeups; > u64 skipped_samples; > }; > @@ -1783,10 +1784,23 @@ static char *timehist_get_commstr(struct thread *thread) > return str; > } > > -static void timehist_header(void) > +static void timehist_header(struct perf_sched *sched) > { > + u32 ncpus = sched->max_cpu + 1; > + u32 i, j; > + > printf("%15s %6s ", "time", "cpu"); > > + if (sched->show_cpu_visual) { > + printf(" "); > + for (i = 0, j = 0; i < ncpus; ++i) { > + printf("%x", j++); > + if (j > 15) > + j = 0; > + } > + printf(" "); > + } > + > printf(" %-20s %9s %9s %9s", > "task name", "wait time", "sch delay", "run time"); > > @@ -1797,6 +1811,9 @@ static void timehist_header(void) > */ > printf("%15s %-6s ", "", ""); > > + if (sched->show_cpu_visual) > + printf(" %*s ", ncpus, ""); > + > printf(" %-20s %9s %9s %9s\n", "[tid/pid]", "(msec)", "(msec)", "(msec)"); > > /* > @@ -1804,6 +1821,9 @@ static void timehist_header(void) > */ > printf("%.15s %.6s ", graph_dotted_line, graph_dotted_line); > > + if (sched->show_cpu_visual) > + printf(" %.*s ", ncpus, graph_dotted_line); > + > printf(" %.20s %.9s %.9s %.9s", > graph_dotted_line, graph_dotted_line, graph_dotted_line, > graph_dotted_line); > @@ -1817,11 +1837,28 @@ static void timehist_print_sample(struct perf_sched *sched, > struct thread *thread) > { > struct thread_runtime *tr = thread__priv(thread); > + u32 max_cpus = sched->max_cpu + 1; > char tstr[64]; > > timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr)); > printf("%15s [%04d] ", tstr, sample->cpu); > > + if (sched->show_cpu_visual) { > + u32 i; > + char c; > + > + printf(" "); > + for (i = 0; i < max_cpus; ++i) { > + /* flag idle times with 'i'; others are sched events */ > + if (i == sample->cpu) > + c = (thread->tid == 0) ? 'i' : 's'; > + else > + c = ' '; > + printf("%c", c); > + } > + printf(" "); > + } > + > printf(" %-*s ", comm_width, timehist_get_commstr(thread)); > > print_sched_time(tr->dt_wait, 6); > @@ -2095,6 +2132,8 @@ static void timehist_print_wakeup_event(struct perf_sched *sched, > > timestamp__scnprintf_usec(sample->time, tstr, sizeof(tstr)); > printf("%15s [%04d] ", tstr, sample->cpu); > + if (sched->show_cpu_visual) > + printf(" %*s ", sched->max_cpu + 1, ""); > > printf(" %-*s ", comm_width, timehist_get_commstr(thread)); > > @@ -2458,7 +2497,7 @@ static int perf_sched__timehist(struct perf_sched *sched) > sched->summary = sched->summary_only; > > if (!sched->summary_only) > - timehist_header(); > + timehist_header(sched); > > err = perf_session__process_events(session); > if (err) { > @@ -2842,6 +2881,7 @@ int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused) > OPT_BOOLEAN('S', "with-summary", &sched.summary, > "Show all syscalls and summary with statistics"), > OPT_BOOLEAN('w', "wakeups", &sched.show_wakeups, "Show wakeup events"), > + OPT_BOOLEAN('V', "cpu-visual", &sched.show_cpu_visual, "Add CPU visual"), > OPT_PARENT(sched_options) > }; > > -- > 2.10.1
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