Re: [PATCH 1/3] perf, x86: Blacklist all MEM_*_RETIRED events for IVB

From: Andi Kleen
Date: Thu May 16 2013 - 12:07:32 EST

> 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.

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