Desktop Performance Tuning?

Jason Morgan jwm-freebsd-questions at
Thu Feb 7 16:20:13 UTC 2008

On Thu, Feb 07, 2008 at 01:07:34AM +0000, RW wrote:
> On Wed, 6 Feb 2008 15:45:14 -0800
> "Eli Scott" <havok173 at> wrote:
> > I recently installed FreeBSD 7.0 RC-1 on my hobby system,
> >..
> > performance seems to degrade whenever i'm compiling
> > things (like, performing a buildworld, installing from ports, etc)
> > which manifests itself as considerable lag in standard desktop
> > operations,
> I've noticed this too, it always used to be the case that building
> didn't make all that much difference to desktop use, but now it make a
> severe difference. Nice helps, but it only makes the
> problem intermittent. I've tried changing the scheduler to ULE, and
> disabling SMP, but it didn't help.
> There have been threads on the stable list about jerky  mouse
> performance, which may be part of this, but I have really followed it
> closely. I'm also wondering whether this might be due to some xorg or
> other port change from late 2007 that I only noticed when I started
> doing a lot of rebuilding under 7-stable.

I've also noticed this. I thought it was because I used the -j4 flag
when building world, but I just rebuilt my kernel last night without
-j4 and had some of the same issues. This has been on both SCHED_ULE
and SCHED_4FSB. I am running AMD64.


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