Messages in this thread | | | Date | Mon, 1 Sep 2014 15:41:12 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 4/5] perf, x86: Add INST_RETIRED.ALL workarounds |
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On Mon, Aug 25, 2014 at 03:43:30PM -0700, Andi Kleen wrote: > From: Andi Kleen <ak@linux.intel.com> > > On Broadwell INST_RETIRED.ALL cannot be used with any period > that doesn't have the lowest 6 bits cleared. And the period > should not be smaller than 128. > > Add a new callback to enforce this, and set it for Broadwell. > > This is erratum BDM57 and BDM11.
This changelog could do with more words on the solution, esp. such that you answer Stephanes question.
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