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Date: Wed, 22 Feb 2012 15:01:16 +0900 From: Namhyung Kim <namhyung.kim@....com> To: linux-kernel@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: Re: 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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