Re: [PATCH]: Free pages from local pcp lists under tight memory conditions

Rohit Seth
2005-11-23T22:29:03Z

On Wed, 2005-11-23 at 13:25 -0800, Christoph Lameter wrote:
> On Wed, 23 Nov 2005, Rohit Seth wrote:
>
> > I thought Nick et.al came up with some of the constant values like batch
> > size to tackle the page coloring issue specifically. In any case, I
> > think one of the key difference between 2.4 and 2.6 allocators is the
> > pcp list. And even with the minuscule batch and high watermarks this is
> > helping ordinary benchmarks (by reducing the variation from run to run).
>
> Could you share some benchmark results?
>

Some components of cpu2k on 2.4 base kernels show in access of 40-50%
variation from run to run. The same variations came down to about 10%
for 2.6 based kernels.

-rohit