Messages in this thread | | | From | Al Boldi <> | Subject | Re: CFS review | Date | Wed, 29 Aug 2007 11:53:30 +0300 |
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Ingo Molnar wrote: > * Keith Packard <keith.packard@intel.com> wrote: > > Make sure the X server isn't running with the smart scheduler > > disabled; that will cause precisely the symptoms you're seeing here. > > In the normal usptream sources, you'd have to use '-dumbSched' as an X > > server command line option. > > > > The old 'scheduler' would run an entire X client's input buffer dry > > before looking for requests from another client. Because glxgears > > requests are small but time consuming, this can cause very long delays > > between client switching. > > on the old box where i've reproduced this i've got an ancient X version: > > neptune:~> X -version > > X Window System Version 6.8.2 > Release Date: 9 February 2005 > X Protocol Version 11, Revision 0, Release 6.8.2 > Build Operating System: Linux 2.6.9-22.ELsmp i686 [ELF] > > is that old enough to not have the smart X scheduler? > > on newer systems i dont see correctly updated glxgears output (probably > the GLX bug you mentioned) so i cannot reproduce the bug. > > Al, could you send us your 'X -version' output?
This is the one I have been talking about:
XFree86 Version 4.3.0 Release Date: 27 February 2003 X Protocol Version 11, Revision 0, Release 6.6 Build Operating System: Linux 2.4.21-0.13mdksmp i686 [ELF]
I also tried the gears test just now on this:
X Window System Version 6.8.1 Release Date: 17 September 2004 X Protocol Version 11, Revision 0, Release 6.8.1 Build Operating System: Linux 2.6.9-1.860_ELsmp i686 [ELF]
but it completely locks up. Disabling add_wait_runtime seems to fix it.
Thanks!
-- Al
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