Re: [patch] CFS scheduler, -v12

Peter Williams
2007-05-16T23:42:37Z

Ingo Molnar wrote:
> * Peter Williams <pwil3058@bigpond.net.au> wrote:
>
>>> As usual, any sort of feedback, bugreport, fix and suggestion is more
>>> than welcome,
>> Load balancing appears to be badly broken in this version. When I
>> started 4 hard spinners on my 2 CPU machine one ended up on one CPU
>> and the other 3 on the other CPU and they stayed there.
>
> hm, i cannot reproduce this on 4 different SMP boxen, trying various
> combinations of SCHED_SMT/MC

You may need to try more than once. Testing load balancing can be a
pain as there's always a possibility you'll get a good result just by
chance. I.e. you need a bunch of good results to say it's OK but only
one bad result to say it's broken. This makes testing load balancing a
pain.

> and other .config options that might make a
> difference to balancing. Could you send me your .config?

Sent separately.

Peter
--
Peter Williams pwil3058@bigpond.net.au

"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce