Bruno Wolff III wrote:
On Wed, Mar 05, 2008 at 14:35:41 -0500,
Chris Snook <csnook@xxxxxxxxxx> wrote:
Ultimately, if latency is a high priority for you, you should switch to the
deadline scheduler.
Is there an easy way to do this? My desktop seems pretty sluggish since
switching to rawhide and I suspect it is disk IO related. I'd like to
try out another scheduler and see if it helps.
At the grub screen, hit 'a' to append kernel arguments, and add
elevator=deadline to the list of parameters. If you like the results,
you can add it permanently by editing /boot/grub/grub.conf.
It's also possible that your sluggish rawhide performance is due to all
the extra debug options that are turned on in the rawhide kernel. I've
seen overhead as high as 30% on some workloads. There's been some
discussion of adding a 'nodebug' kernel variant to rawhide that's
compiled with roughly the same options as the stable Fedora kernel, but
I don't know when or if that's going to happen.
-- Chris
