CPU 100%
Chris Jones
jonesc at hep.phy.cam.ac.uk
Sun Jun 17 19:38:42 UTC 2007
Hi,
> In fact the problem seems related to compiz. If i disable desktop
> effects. The computer is usable all the time with compiling.
I have had exactly the same problems - The fact is compiz is not fully mature
and these sorts of things can occur.
The problem, is compiz/X requires considerably more cpu than a simple X
session, and when your cpu is overloaded with other things it can start to
impact on your interactive X performance, as you have seen.
There are a few things you can try.
A simple thing is to also start any process which is likely to be cpu
intensive at a high nice value, higher than 0 the default for interactive
processes. i.e if you normally run
> foo
instead try
> nice -n 10 foo
which instead will run foo at a nice value of 10. 0 is the highest priority a
user (other than root) can give a process, and has the highest priority. 19
is the lowest priority (or most 'nice')
Alternatively, you could try playing with schedtool to give X more priority
than it normally has. Be careful though not to give it too much priority,
since it you do your system can really suffer.
http://linux.derkeiler.com/Mailing-Lists/Fedora/2006-10/msg03995.html
cheers Chris
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