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SubjectRe: [patch] CFS (Completely Fair Scheduler), v2
Ingo Molnar wrote:
> this is the second release of the CFS (Completely Fair Scheduler)
> patchset, against v2.6.21-rc7:
>
> http://redhat.com/~mingo/cfs-scheduler/sched-cfs-v2.patch
>
> i'd like to thank everyone for the tremendous amount of feedback and
> testing the v1 patch got - i could hardly keep up with just reading the
> mails! Some of the stuff people addressed i couldnt implement yet, i
> mostly concentrated on bugs, regressions and debuggability.

Have you considered using rq->raw_weighted_load instead of
rq->nr_running in calculating fair_clock? This would take the nice
value (or RT priority) of the other tasks into account when determining
what's fair.

Peter
PS You'd have to change the migration thread's load_weight from 0 to 1
in order to prevent divide by zero without having to explicitly check
for it every time.
--
Peter Williams pwil3058@bigpond.net.au

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