Re: [patch] CFS scheduler, -v12

[Peter Williams <pwil3058@bigpond.net.au>]

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