kamikaze at bsdforen.de
Sun Apr 12 14:50:34 UTC 2009
Robert Noland wrote:
> 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...
After a couple of hours uptime (~9), the IRQ problem reappeared. So, it
takes a lot more time to occur, but it still happens.
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