On Mon, 12 Jun 2006, Andi Kleen wrote:
> Saving two instructions? And PDA is usually in L1. I doubt you could benchmark
> a difference.
The two instructions occur over and over again for each PDA reference. And
then there are now two more instruction for disabling preempt and
reenabling preempt.
A simple dec/inc <absolute location> would be nicely suitable for
inlining per processor counters.
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