Re: Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others)

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

William Lee Irwin III wrote:
> On Tue, Aug 10, 2004 at 07:21:43PM -0700, spaminos-ker@yahoo.com wrote:
> 
>>I am not very familiar with all the parameters, so I just kept the defaults
>>Anything else I could try?
>>Nicolas
> 
> 
> No. It appeared that the SPA bits had sufficient fairness in them to
> pass this test but apparently not quite enough.
> 

The interactive bonus may interfere with fairness (the throughput bonus 
should actually help it for tasks with equal nice) so you could try 
setting max_ia_bonus to zero (and possibly increasing max_tpt_bonus). 
With "eb" mode this should still give good interactive response but 
expect interactive response to suffer a little in "pb" mode however 
renicing the X server to a negative value should help.

Peter
PS There's a primitive GUI available for setting the scheduler 
parameters at 
<http://prdownloads.sourceforge.net/cpuse/gcpuctl_hydra-1.3.tar.gz?download>
this is just a Python script with a Glade XML file (gcpuctl_hydra.glade) 
which needs to be in the same directory that you run the script from.
-- 
Peter Williams                                   pwil3058@bigpond.net.au

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