Messages in this thread | | | From | Andi Kleen <> | Subject | Re: broken local_t on i386 | Date | Mon, 12 Jun 2006 19:55:47 +0200 |
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On Monday 12 June 2006 20:42, Christoph Lameter wrote: > 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.
Only for those who set CONFIG_OVERHEAD
> A simple dec/inc <absolute location> would be nicely suitable for > inlining per processor counters.
Possible, but is it worth reinventing the linker?
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