rnoland at FreeBSD.org
Fri Apr 10 17:22:42 UTC 2009
On Fri, 2009-04-10 at 16:53 +0200, Dominic Fandrey wrote:
> Robert Noland wrote:
> > I've been working on the Intel vblank / irq issues. Every time I commit
> > something thinking that I have it resolved, it isn't. So I'm waiting on
> > hardware to arrive that will let me test this all more thoroughly. I do
> > have a patch that I think fixes most of the issues on Intel, but the ddx
> > driver is still doing some silly things that cause issues in some cases.
> > I *think* the only outstanding issue I have with Intel is if something
> > is rendering (synced to vblank or not) when the display goes into dpms
> > sleep, there isn't anything to block that app, so it renders as hard as
> > it can even though it isn't being displayed. In reality, this probably
> > isn't a huge issue, but running gears while the display is asleep keeps
> > the cpu at 100%, which isn't ideal. Normal apps that aren't trying to
> > draw as fast as they can, shouldn't cause an issue.
> With the latest drm, the IRQ craziness is gone. However, the crappy
> performance remains. 2 months ago a RELENG_7 with all packages
> up to date yielded 124fps in a q3 timedemo that now yields 80fps.
Things are still not quite right with the Intel driver. But performance
regressions are reported across Linux as well. A little of this might
be us, but most of it is Intel...
Robert Noland <rnoland at FreeBSD.org>
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