Messages in this thread | | | Date | Wed, 5 Feb 2014 14:37:29 -0500 (EST) | From | Vince Weaver <> | Subject | Re: [PATCH] perf,x86,p6: Add userspace RDPMC quirk for P6 |
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On Wed, 5 Feb 2014, Vince Weaver wrote:
> Has someone actually hit this bug? People used PAPI/perfctr on these > machines for years, and it uses rdpmc by default so I would think it would > show up if it were an issue. I should check the perfctr code to see if it > had some sort of check.
I can verify the perfctr code does have a case for PPRO errata 26, but it only disables things on pentium pros with stepping less than 9.
It also disables rdpmc on original Pentiums due to errata 74 but I don't think we have to worry about that one.
Vince
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