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Date: Mon, 14 Dec 2015 12:12:49 -0300 From: Arnaldo Carvalho de Melo <acme@...nel.org> To: Jiri Olsa <jolsa@...hat.com> Cc: Andi Kleen <andi@...stfloor.org>, jolsa@...nel.org, mingo@...nel.org, linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com> Subject: Re: [PATCH] perf, tools: Disable branch flags/cycles for --callgraph lbr Em Mon, Dec 14, 2015 at 10:55:38AM +0100, Jiri Olsa escreveu: > On Fri, Dec 11, 2015 at 04:12:24PM -0800, Andi Kleen wrote: > > From: Andi Kleen <ak@...ux.intel.com> > > > > [The kernel patch needed for this is in tip now > > (b16a5b52eb9 perf/x86: Add option to disable ...) > > So this user tools patch to make use of it should be merged now] > > > > Automatically disable collecting branch flags and cycles with > > --call-graph lbr. This allows avoiding a bunch of extra MSR > > reads in the PMI on Skylake. > > > > When the kernel doesn't support the new flags they are automatically > > cleared in the fallback code. > > > > v2: Switch to use branch_sample_type instead of sample_type. > > Adjust description. > > Fix the fallback logic. > > Signed-off-by: Andi Kleen <ak@...ux.intel.com> > > Acked-by: Jiri Olsa <jolsa@...nel.org> Thanks, applied to perf/core. - Arnaldo -- 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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