fc2, xorg, 2.6.x, scheduling latency peaks

[Alan Cox]

On Wed, Jun 02, 2004 at 10:35:44AM -0700, Fernando Pablo Lopez-Lezcano wrote:
> > DRI sometimes can "hold" the pci bus for quite some time, which by
> > definition causes latency since no IO can be done
> 
> Yes. I also tried changing the bus latency for the different "cards" in
> the laptop using setpci. No change. I could get better overall
> performance (ie: the screen would update faster with the xrun
> information :-)

This is true in the non DRI case too. Several card designs can lock the
bus for considerable periods of time and there is nothing Linux can do
about these cases. In the Matrox case its configurable (see man mga)
I don't know about the others.

Alan