945GM<->965GM huge performance differences when running GLX apps in parallel
eric at anholt.net
Fri Feb 1 17:38:01 PST 2008
On Tue, 2008-01-29 at 15:09 +0100, Jens Stroebel wrote:
> 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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