Re: broken local_t on i386

Andi Kleen
2006-06-12T18:56:28Z

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?

-Andi