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    SubjectRe: perf record: can I specify multiple events and use different sample-after value
    2012-02-23 4:03 AM, Yuanfang Chen wrote:
    > On Wed, Feb 22, 2012 at 6:40 AM, Namhyung Kim <namhyung@gmail.com> wrote:
    >> Namhyung Kim <namhyung.kim@lge.com> 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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