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Date: Thu, 30 Jun 2011 14:10:39 +0200 From: Stephane Eranian <eranian@...gle.com> To: Lin Ming <ming.m.lin@...el.com> Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>, Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>, Arnaldo Carvalho de Melo <acme@...stprotocols.net>, linux-kernel <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 0/4] perf: Intel uncore pmu counting support On Thu, Jun 30, 2011 at 10:09 AM, Lin Ming <ming.m.lin@...el.com> wrote: > Hi, all > > I posted uncore patches months ago, but it was pended due to an uncore > interrupt problem. > > This series are cut to support uncore pmu counting only. > So uncore interrupt handling is not needed. > You're making the assumption that when counting, you can never construct a measurement that will cause a counter to overflow the 39 bits. If not, then you need interrupt handling even when counting. > The uncore pmu type is allocated dynamically and exported via sysfs. > $ cat /sys/bus/event_source/devices/uncore/type > 6 > > You can count uncore raw events as below, > $ perf stat -e uncore:r0101 ls > > It reads uncore pmu type id from sysfs to setup perf_event_attr::type. > > Comments are appreciated. > > Thanks, > Lin Ming > > -- 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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