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xen-devel
Re: [Xen-devel] performance counters
On 15/3/07 14:37, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:
>> at least on architectures where we know the resulting incorrectness is not
>> 'too bad' (that includes x86). Some of the shared counters are on hot paths.
>> Alternatively we could make *all* counters per-cpu, even histogram counter
>> arrays.
>
> To me that would seem like the better alternative than dropping atomicity.
It has the added benefit of avoiding cacheline bouncing.
It just needs someone to implement this improvement. ;-)
-- Keir
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