May 5th, 2006

face

tracking down regression

I'm using the i915 for some stuff at work, and one of the other guys noticed a serious performance regression between the 7.0 and Mesa HEAD drivers,

One of the DRI users also mentioned it, so I took a few days to track it down...

1. A temporary fix and disabled feature caused a regression in glxgears from 1100FPS to about 800FPS
2. a ppracer regression from about 35FPS to about 12FPS, this was caused by some stencil changes made back ages ago,
3. Optimisations were turned off in the compiler..

All hanging out on bug #6814