Fedora QA team member Will Woods looks at recent changes to add kernel modesetting to Fedora in a post on his blog
. People were noticing a sizeable decrease in the frame rate of glxgears, believing that it was a good general measure of 3D performance. "[...] glxgears is rendering an insanely simple scene - so simple that the actual 3D rendering time is basically zero. So the only thing glxgears really tests is the performance of glXSwapBuffers() - basically, how fast we can push render buffers into the card. This operation is slower with DRI2, but - roughly speaking - unless it was an order of magnitude slower (e.g. glxgears drops from 1000FPS to under 100FPS) it wouldn't make any real difference.
" One of the tests he recommends for 3D performance is the always amusing Extreme TuxRacer.
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