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    SubjectRe: perf record: can I specify multiple events and use different sample-after value
    2012-02-22 10:59 AM, Yuanfang Chen wrote:
    > Hi all,
    >

    Hi,


    > 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.

    BTW, it seems you were using old version of perf (and kernel too, maybe).
    I have no idea if your perf wouldn't support the option. :)

    The "-l" option was meaningful only if you specified events more than the
    actual number of counters in the PMU.


    > Another question is that how can I specify multiple events and use
    > different sample-after value for each of them? like perf record -c
    > 10000,2000000,2000000 -e r2d4,r03c,r0c0
    >

    It's not possible now. You should run a number of instances of perf for
    that purpose AFAIK.


    Thanks,
    Namhyung


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