945GM<->965GM huge performance differences when running GLX apps in parallel

[Eric Anholt]

On Tue, 2008-01-29 at 15:09 +0100, Jens Stroebel wrote:
> 		Hi.
> 
> When I start the example-prog teapot on intel 965GM, it runs with 160 
> FPS BUT drops to astonishing 5 FPS when a glxgears is started.
> 
> On intel 945GM, this is along the lines of 60 PFS <-> 30 FPS (which is 
> 50%, compared to .. below 5% in the above case).
> 
> Can anybody tell me why this is so?

Not using TTM, I'm guessing?  Non-TTM context switching was much more
expensive on 965.

-- 
Eric Anholt                             anholt at FreeBSD.org
eric at anholt.net                         eric.anholt at intel.com

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