Re: [rfc][patch] store-free path walking

Andi Kleen
2009-10-09T17:50:11Z

> A few years ago when K7s were not ancient yet, after hearing
> argument for and against non-temporal stores,
> I decided to finally figure it for myself.
>
> I tested kernel build workload on two kernels with the only
> one difference - clear_page with and without non-temporal stores.
>
> "Non-temporal stores" kernel was faster, not slower. Just a little bit,
> but reproducibly.

I did the same experiments and in my case (K8) they were slower in
real-world benchmarks for clear_page (but faster in micro benchmarks)

But I didn't propose non temporal anyways.

-Andi

--
ak@linux.intel.com -- Speaking for myself only.