Messages in this thread | | | Date | Tue, 9 Dec 2008 12:02:46 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] Performance Counters for Linux, v2 |
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* stephane eranian <eranian@googlemail.com> wrote:
> > There's also more generic x86 support: all 4 generic PMCs of Nehalem > > / Core i7 are supported - i've run 4 instances of KernelTop and they > > used up four separate PMCs. > > Core/Atom have 5 counters, Nehalem has 7. Why are you not using all of > them already?
no, Nehalem has 4 generic purpose PMCs and 3 fixed-purpose PMCs (7 total), Core/Atom has 2 generic PMCs and 3 fixed-purpose PMCs (5 total). Saying that it has 7 is misleading. (and even the generic PMCs have constraints)
Ingo
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