Re: excessive Xfree CPU with linux 2.6?
On Fri, 2004-01-02 at 08:45, Michel Dänzer wrote:
> On Thu, 2004-01-01 at 23:48, Kristian Kvilekval wrote:
> > I am trying to use the latest kernel, but have noticed
> > some changes in the X environment. Simple text output
> > has become CPU intensive. For example,
> > "ps aux" in a gnome-terminal can force the X server
> > process into 70% CPU usage as monitored by top. The
> > output is bursty and can slow to a crawl sometimes.
> Has Sean's suggestion about the X server nice level helped?
I had tried renicing the Xfree server to 0, with little
effect. I can still get text output to eat up 60% cpu
at times.
> See also
> http://lists.debian.org/debian-powerpc/2003/debian-powerpc-200312/msg00144.html and http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=109753 .
Thanks for the pointers, the first describes something similar to what I
am seeing, however the discussion diverts simply to using enabling
bitmapped fonts. The second suggests disabling anti-aliasing.
Unfortunately, I am using fixed font in the terminal and have
disabled all hinting and smoothing in gnome.
The behavior is definitely that I see fast output mixed
with very slow and CPU intensive. I guess this points to
scheduler problems.
> It seems that the kernel scheduler (related to the interactivity
> tuning?) and/or some X clients behave suboptimally.
Seems strange that it would be most noticeable for text output.
I wouldn't suspect there would be anything particular about
the path for outputing text.
I guess I will try disabling the new schedulers and see if that
has an effect.
--
Kristian G. Kvilekval
email:kris@cs.ucsb.edu office:(805)893-4276 http://www.cs.ucsb.edu/~kris
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