Re: perf record: can I specify multiple events and use differentsample-after value

[Namhyung Kim]

2012-02-23 4:03 AM, Yuanfang Chen wrote:
> On Wed, Feb 22, 2012 at 6:40 AM, Namhyung Kim <namhyung@xxxxxxxxx> wrote:
> > Namhyung Kim <namhyung.kim@xxxxxxx> wrote:
> > > 2012-02-22 10:59 AM, Yuanfang Chen wrote:
> > > > I'm trying use perf tool from the linux kernel package to measure
> > > > several raw PMU events. In the manpage of perf-record there is an "-l"
> > > > option (Scale counter values), which is useful for my case because I
> > > > want to know the total counter value, not just sample count. However
> > > > it seems the -l is not recognized, is this expected? How can I get a
> > > > total count?
> > >
> > > "perf report --show-total-period" will be your friend.
> >
> > Or else, why not simply run "perf stat"?
>
> My purpose is to get some PMU counter value during each time interval,
> only perf record can do this. When using perf record -F, I have to add
> up all period value for some event in a some interval to get that
> value. When perf record -c, things get a easier, just (sample count x
> sample after value) will do, only hassle is to get sample count in
> some time interval. However, perf record don't have an option to do
> this.

I still don't get it. Why "perf stat -e <events> -p <pid> -- sleep <interval>"
doesn't work for you? It will show you the value, won't it?

Thanks,
Namhyung
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