Re: CFS review

[Ingo Molnar]

* Keith Packard <keith.packard@xxxxxxxxx> 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?

	Ingo
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/