Messages in this thread |  | | | Date | Wed, 22 Feb 2012 15:01:16 +0900 | | From | Namhyung Kim <> | | Subject | Re: perf record: can I specify multiple events and use different sample-after value |
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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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