Re: broken local_t on i386

[Christoph Lameter]

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.


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/