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SubjectRe: Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others)
Date writes:

> --- Con Kolivas <> wrote:
>> Hi
>> I tried this on the latest staircase patch (7.I) and am not getting any
>> output from your script when tested up to 60 threads on my hardware. Can you
>> try this version of staircase please?
>> There are 7.I patches against 2.6.8-rc4 and 2.6.8-rc4-mm1
>> Cheers,
>> Con
> One thing to note is that I do get a lot of output from the script if I set
> interactive to 0 (delays between 3 and 13 seconds with 60 threads).

Sounds fair.

With interactive==0 it will penalise tasks during their bursts of cpu usage
in the interest of fairness, and your script effectively is BASH doing a
burst of cpu so 3-13 second delays when the load is effectively >60 is
pretty good.


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