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Date: Fri, 7 Aug 2015 15:03:02 +0300 From: Max Filippov <jcmvbkbc@...il.com> To: Peter Zijlstra <peterz@...radead.org> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>, "linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>, LKML <linux-kernel@...r.kernel.org>, Chris Zankel <chris@...kel.net>, Marc Gauthier <marc@...ence.com>, Paul Mackerras <paulus@...ba.org>, Ingo Molnar <mingo@...hat.com> Subject: Re: [PATCH v2 07/13] xtensa: implement counting and sampling perf events On Fri, Aug 7, 2015 at 12:13 PM, Peter Zijlstra <peterz@...radead.org> wrote: > On Thu, Aug 06, 2015 at 04:46:32PM -0300, Arnaldo Carvalho de Melo wrote: >> Em Sat, Jul 18, 2015 at 11:30:10AM +0300, Max Filippov escreveu: >> > Xtensa Performance Monitor Module has up to 8 32 bit wide performance >> > counters. Each counter may be enabled independently and can count any >> > single type of hardware performance events. Event counting may be enabled >> > and disabled globally (per PMM). >> > Each counter has status register with bits indicating if the counter has >> > been overflown and may be programmed to raise profiling IRQ on overflow. >> > This IRQ is used to rewind counters and allow for counting more than 2^32 >> > samples for counting events and to report samples for sampling events. >> > >> > For more details see Tensilica Debug User's Guide, chapter 8 >> > "Performance monitor module". >> >> Has this gone via PeterZ? I added the tools/ bits in my perf/core >> branch, will go in next pull req, > > I was thinking it would go through the xtensa tree. Looks fine at a > quick glance and they can actually test it. Right, had the same idea. -- Thanks. -- Max -- 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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