Messages in this thread | | | Date | Thu, 16 May 2013 18:26:27 +0200 | Subject | Re: [PATCH 1/3] perf, x86: Blacklist all MEM_*_RETIRED events for IVB | From | Stephane Eranian <> |
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On Thu, May 16, 2013 at 6:07 PM, Andi Kleen <ak@linux.intel.com> wrote: >> The difficulty is that we cannot use the shared_regs infrastructure because >> the constraint is quite different. Here we need to say that if a mem event >> uses cnt0 on one thread, then nothing can be using cnt0 on the other thread. >> The current shared_regs infrastructure does not work on the counter level. >> So we need to invent something else. It cannot even be extended. > > Just need a extra reg per counter, that is only triggered with that event. > Yes, it would be per counter and not per-event. But the check has to happen after the assignment and each time we release the counter.
> -Andi
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