https://bugs.freedesktop.org/show_bug.cgi?id=27069 --- Comment #3 from Stefan Dösinger <stefandoesinger@xxxxxx> 2011-09-01 16:20:12 PDT --- This problem still exists, UMS(as far as 3D is still working with it) is much faster than KMS. Unfortunately the only app that's still working with UMS in Mesa 7.11 is glxgears. On my r250 GPU glxgeares runs at 2600 fps with UMS, 1070 with KMS(default Window size). At 1400x1050 the numbers are 370 fps(UMS) and 60 fps(KMS). I don't think vsync causes the issue, disabling it seems to work fine, at least for windowed apps. etracer is still a lot slower with KMS than it used to be. At 1400x1050 and otherwise default settings it runs at 15-20 fps. With an ancient Mesa version I tested today(6.4.2) it runs at a pretty okish 60 fps at the same settings. The problem seems to be on the GPU side. Whenever the problem occurs the CPU is idle and the GPU working, and increasing the rendering resolution makes the problem worse. The unfortunate situation this creates is that the 6 years old Mesa on my old hard drive vastly outperforms Mesa 7.11 in many rendering situations. I could not spot any CPU side problems, but the GPU slowness makes it hard to test. My unscientific guess is that in setups where the KMS GPU slowness doesn't matter Mesa 7.11 is about 50% faster than Mesa 6.4.2. (etracer with a tiny resolution, long view range and lots of objects) I'll test r300 on a Radeon X1600 GPU over the weekend. This GPU/driver combo is pretty slow as well, but I'm not sure if r300 still supports UMS. -- Configure bugmail: https://bugs.freedesktop.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
