Messages in this thread |  | | | Date | Thu, 11 Nov 2010 20:45:07 +0100 | | From | Andi Kleen <> | | Subject | Re: [PATCH 1/3] perf-events: Add support for supplementary event registers |
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On 11/11/2010 8:36 PM, Peter Zijlstra wrote: > > Can we make it so, that is, move that int inside the intel_percore > struct? >
It's needed per cpu. Basically the flag says "bother to look into the percore structure" This way most of this is kept out of the fast paths. But one CPU in a core may need it and the other not.
In principle it could be merged into some other cpuc flag word if you have any suggestions.
> > Hrm,.. but we only need to do this on nhm/wsm init, we already have code > detecting the cpu model. And I'm quite sure you know where to poke to > see if HT is enabled.
Ok I guess I can do a dynamic per cpu allocation for this case.
-Andi
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