On Mon, Jul 28, 2003 at 11:40:41AM -0700, Andrew Morton wrote:
> Valdis.Kletnieks@vt.edu wrote:
> >
> > I am, however, able to get 'xmms' to skip. The reason is that the CPU is being
> > scheduled quite adequately, but I/O is *NOT*.
> >
> > ...
> > I'm guessing that the anticipatory scheduler is the culprit here. Soon as I figure
> > out the incantations to use the deadline scheduler, I'll report back....
>
> Try decreasing the expiry times in /sys/block/hda/queue/iosched:
>
> read_batch_expire
> read_expire
> write_batch_expire
> write_expire
I noticed that when bringing a huge application out of swap (mozilla,
openoffice, also tested the gimp with 50 images open) that dividing
everything by 2 in those 4 files I get a decent process fork. Without
this tuning the fork (xterm) waits till the application is back up.
-- Regards,Wiktor Wodecki
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