linux-kernel - Re: [PATCH v2 2/2] perf stat: Add support to print counts after a period of time

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Date:   Fri, 26 Jan 2018 08:51:04 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     禹舟键 <ufo19890607@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>, mingo@...hat.com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...nel.org>, David Ahern <dsahern@...il.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Milian Wolff <milian.wolff@...b.com>,
        Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>,
        Wind Yu <yuzhoujian@...ichuxing.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Wang Nan <wangnan0@...wei.com>,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
        acme@...hat.com
Subject: Re: [PATCH v2 2/2] perf stat: Add support to print counts after a
 period of time

On Fri, Jan 26, 2018 at 09:59:02AM +0800, 禹舟键 wrote:
> 2018-01-25 20:27 GMT+08:00 Jiri Olsa <jolsa@...hat.com>:
> 
> > On Thu, Jan 25, 2018 at 10:10:04AM +0100, ufo19890607 wrote:
> >
> > SNIP
> >
> > >  --metric-only::
> > >  Only print computed metrics. Print them in a single line.
> > > diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> > > index 406f546ad74c..427f06dc35cc 100644
> > > --- a/tools/perf/builtin-stat.c
> > > +++ b/tools/perf/builtin-stat.c
> > > @@ -573,6 +573,7 @@ static int __run_perf_stat(int argc, const char
> > **argv)
> > >  {
> > >       int interval = stat_config.interval;
> > >       int times = stat_config.times;
> > > +     int time = stat_config.time;
> > >       char msg[BUFSIZ];
> > >       unsigned long long t0, t1;
> > >       struct perf_evsel *counter;
> > > @@ -586,6 +587,9 @@ static int __run_perf_stat(int argc, const char
> > **argv)
> > >       if (interval) {
> > >               ts.tv_sec  = interval / USEC_PER_MSEC;
> > >               ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
> > > +     } else if (time) {
> > > +             ts.tv_sec  = time / USEC_PER_MSEC;
> > > +             ts.tv_nsec = (time % USEC_PER_MSEC) * NSEC_PER_MSEC;
> >
> > I like the idea.. it won't work with -I option, but let's
> > keep it like that until someone needs it ;-)
> >
> >
> Hi Jirka
> 
> What do you mean by this sentence？？？

that I'm ok with the patch with small fixes I mentioned

jirka