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Date: Fri, 28 Oct 2016 10:53:38 -0200
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Joonwoo Park <joonwoop@...eaurora.org>
Cc: Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org,
Namhyung Kim <namhyung@...nel.org>,
David Ahern <dsahern@...il.com>, Jiri Olsa <jolsa@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH 08/15] perf tools: Introduce timestamp_in_usec()
Em Thu, Oct 27, 2016 at 04:14:55PM -0700, Joonwoo Park escreveu:
>
>
> On 10/27/2016 01:40 PM, Arnaldo Carvalho de Melo wrote:
> > From: Namhyung Kim <namhyung@...nel.org>
> >
> > Joonwoo reported that there's a mismatch between timestamps in script
> > and sched commands. This was because of difference in printing the
> > timestamp. Factor out the code and share it so that they can be in
> > sync. Also I found that sched map has similar problem, fix it too.
> >
> > Reported-and-Acked-by: Joonwoo Park <joonwoop@...eaurora.org>
>
> Hmm.. I didn't ACK this patch because of bug I commented at
> https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg1256724.html
>
> s/work_list->max_lat/work_list->max_lat_at/
Sorry about that, I took the "thanks for taking care of this" as an ack,
now that I re-read that message I saw your points later on in that
e-mail.
Since Ingo hasn't pulled this, I'll try fixing it, will check that other
naming issue,
- Arnaldo
> Do we have fix for this?
>
> Thanks,
> Joonwoo
>
> > Signed-off-by: Namhyung Kim <namhyung@...nel.org>
> > Cc: David Ahern <dsahern@...il.com>
> > Cc: Jiri Olsa <jolsa@...nel.org>
> > Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
> > Link: http://lkml.kernel.org/r/20161024020246.14928-3-namhyung@kernel.org
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> > ---
> > tools/perf/builtin-sched.c | 9 ++++++---
> > tools/perf/builtin-script.c | 9 ++++++---
> > tools/perf/util/util.c | 9 +++++++++
> > tools/perf/util/util.h | 3 +++
> > 4 files changed, 24 insertions(+), 6 deletions(-)
> >
> > diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
> > index 1f33d15314a5..f0ab715b4923 100644
> > --- a/tools/perf/builtin-sched.c
> > +++ b/tools/perf/builtin-sched.c
> > @@ -1191,6 +1191,7 @@ static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_
> > int i;
> > int ret;
> > u64 avg;
> > + char buf[32];
> >
> > if (!work_list->nb_atoms)
> > return;
> > @@ -1213,11 +1214,11 @@ static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_
> >
> > avg = work_list->total_lat / work_list->nb_atoms;
> >
> > - printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13.6f s\n",
> > + printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13s s\n",
> > (double)work_list->total_runtime / NSEC_PER_MSEC,
> > work_list->nb_atoms, (double)avg / NSEC_PER_MSEC,
> > (double)work_list->max_lat / NSEC_PER_MSEC,
> > - (double)work_list->max_lat_at / NSEC_PER_SEC);
> > + timestamp_in_usec(buf, sizeof(buf), work_list->max_lat));
> > }
> >
> > static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
> > @@ -1402,6 +1403,7 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
> > int cpus_nr;
> > bool new_cpu = false;
> > const char *color = PERF_COLOR_NORMAL;
> > + char buf[32];
> >
> > BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
> >
> > @@ -1492,7 +1494,8 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
> > if (sched->map.cpus && !cpu_map__has(sched->map.cpus, this_cpu))
> > goto out;
> >
> > - color_fprintf(stdout, color, " %12.6f secs ", (double)timestamp / NSEC_PER_SEC);
> > + color_fprintf(stdout, color, " %12s secs ",
> > + timestamp_in_usec(buf, sizeof(buf), timestamp));
> > if (new_shortname || (verbose && sched_in->tid)) {
> > const char *pid_color = color;
> >
> > diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> > index 412fb6e65ac0..dae4d1013c33 100644
> > --- a/tools/perf/builtin-script.c
> > +++ b/tools/perf/builtin-script.c
> > @@ -441,7 +441,6 @@ static void print_sample_start(struct perf_sample *sample,
> > {
> > struct perf_event_attr *attr = &evsel->attr;
> > unsigned long secs;
> > - unsigned long usecs;
> > unsigned long long nsecs;
> >
> > if (PRINT_FIELD(COMM)) {
> > @@ -468,14 +467,18 @@ static void print_sample_start(struct perf_sample *sample,
> > }
> >
> > if (PRINT_FIELD(TIME)) {
> > + char buf[32];
> > + size_t sz = sizeof(buf);
> > +
> > nsecs = sample->time;
> > secs = nsecs / NSEC_PER_SEC;
> > nsecs -= secs * NSEC_PER_SEC;
> > - usecs = nsecs / NSEC_PER_USEC;
> > +
> > if (nanosecs)
> > printf("%5lu.%09llu: ", secs, nsecs);
> > else
> > - printf("%5lu.%06lu: ", secs, usecs);
> > + printf("%12s: ", timestamp_in_usec(buf, sz,
> > + sample->time));
> > }
> > }
> >
> > diff --git a/tools/perf/util/util.c b/tools/perf/util/util.c
> > index 85c56800f17a..aa3e778989ce 100644
> > --- a/tools/perf/util/util.c
> > +++ b/tools/perf/util/util.c
> > @@ -433,6 +433,15 @@ int parse_nsec_time(const char *str, u64 *ptime)
> > return 0;
> > }
> >
> > +char *timestamp_in_usec(char *buf, size_t sz, u64 timestamp)
> > +{
> > + u64 sec = timestamp / NSEC_PER_SEC;
> > + u64 usec = (timestamp % NSEC_PER_SEC) / NSEC_PER_USEC;
> > +
> > + scnprintf(buf, sz, "%"PRIu64".%06"PRIu64, sec, usec);
> > + return buf;
> > +}
> > +
> > unsigned long parse_tag_value(const char *str, struct parse_tag *tags)
> > {
> > struct parse_tag *i = tags;
> > diff --git a/tools/perf/util/util.h b/tools/perf/util/util.h
> > index 71b6992f1d98..ece974f1c538 100644
> > --- a/tools/perf/util/util.h
> > +++ b/tools/perf/util/util.h
> > @@ -362,4 +362,7 @@ extern int sched_getcpu(void);
> > #endif
> >
> > int is_printable_array(char *p, unsigned int len);
> > +
> > +char *timestamp_in_usec(char *buf, size_t sz, u64 timestamp);
> > +
> > #endif /* GIT_COMPAT_UTIL_H */
> >
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