William Lee Irwin III wrote:
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.
On Tue, Apr 17, 2007 at 04:46:57PM +1000, Peter Williams wrote:
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.
I suspect you mean (curr->load_weight*delta_exec)/rq->raw_weighted_load
in update_curr().
Or something like that, yes. :-)
I was trying to make the point that the weighted load stuff provides
useful data for implementing nice (in a number of ways e.g. see spa_ebs).
Also, now that the old time slices are gone, a simpler more efficient
function for mapping RT priority or nice (as appropriate) to
p->load_weight can be used instead of the current one which uses the
time slice the task would have been allocated as a basis. I'd suggest
the function that the current one replaced. (Because it was mine :-)).
Peter
--
Peter Williams [email protected]
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
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