Re: [ck] Re: [PATCH] implement nice support across physical cpus on SMP

[Con Kolivas <kernel@kolivas.org>]

On Tue, 10 May 2005 09:54 am, Carlos Carvalho wrote:
> Con Kolivas (kernel@kolivas.org) wrote on 9 May 2005 21:47:
>  >Perhaps if I make the prio_bias multiplied instead of added to the cpu
>  > load it will be less affected by SCHED_LOAD_SCALE. The attached patch
>  > was confirmed during testing to also provide smp distribution according
>  > to nice on 4x.
>
> It seems to work. I've tested it for a few hours on the same machine
> and the 2 nice 0 processes take the bulk of the cpu time, while that
> cpu bound program running at nice 19 takes only about 7%.
>
> Maybe it's a bit early to say it's fine, but it does semm much better
> than before, so I think it should go into the tree.
>
> Thanks a lot!

My pleasure. Thanks for testing.

I'll roll up these patches for rc4 and make smp nice balancing a config option 
for ultimate flexibility.

Cheers,
Con