Messages in this thread | | | Date | Tue, 21 Oct 2014 14:28:06 +0200 | Subject | Re: [PATCH v2 0/12] perf/x86: implement HT leak workaround for SNB/IVB/HSW | From | Stephane Eranian <> |
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Peter,
On Tue, Oct 21, 2014 at 1:25 PM, Peter Zijlstra <peterz@infradead.org> wrote: > > > lkml.kernel.org/r/CABPqkBRbst4sgpgE5O_VXt-CSC0VD=aP2KWA0e3Uy64tw7df3A@mail.gmail.com > > I missed that 3 lines if they were in here. > I did not put them in there because there is another problem. If you partition the generic counters 2 and 2, then some CPUs will not be able to measure some events. Unfortunately, there is no way to partition the 4 counters such that all the events can be measured by each CPU. Some events or precise sampling requires counter 2 for instance (like prec_dist). That's why I did not put this fix in.
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