Messages in this thread | | | Date | Mon, 14 Dec 2015 12:12:49 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH] perf, tools: Disable branch flags/cycles for --callgraph lbr |
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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@linux.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@linux.intel.com> > > Acked-by: Jiri Olsa <jolsa@kernel.org>
Thanks, applied to perf/core.
- Arnaldo
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