Paolo Ornati wrote:
On Sat, 31 Dec 2005 11:34:46 +0100
Paolo Ornati <[email protected]> wrote:
It is a patch against the 2.6.15-rc7 kernel and includes some other
scheduling patches from the -mm kernels.
Yes, this fixes both my test-case (transcode & little program), they
get priority 25 instead of ~16.
But the priority of DD is now ~23 and so it still suffers a bit:
I forgot to mention that even the others "interactive" processes
don't get a good priority too.
Xorg for example, while only moving the cursor around, gets priority
23/24. And when cpu-eaters are running (at priority 25) it isn't happy
at all, the cursor begins to move in jerks and so on...
OK. This probably means that the parameters that control the mechanism
need tweaking.
There should be a file /sys/cpusched/attrs/unacceptable_ia_latency which
contains the latency (in nanoseconds) that the scheduler considers
unacceptable for interactive programs. Try changing that value and see
if things improve? Making it smaller should help but if you make it too
small all the interactive tasks will end up with the same priority and
this could cause them to get in each other's way.
Thanks,
Peter
--
Peter Williams [email protected]
"Learning, n. The kind of ignorance distinguishing the studious."
-- Ambrose Bierce
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