Re: [tip:perf/urgent] perf/x86: Enable raw event access to Inteloffcore events

[Peter Zijlstra]

On Mon, 2011-11-21 at 22:39 +0100, Stephane Eranian wrote:
> To solve this problem (in the general case), you need to know which
> counter is taken (or required)
> by ALL pinned system-wide events across all CPUs. Once you've
> constructed the bitmap, you can
> use it as the basis (used_mask) to try and schedule the group events.
> 
Its worse, you also need to consider all task-pinned events if you want
to be complete. That's an even worse problem.
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