Hi, On Sat, May 29, 2010 at 12:55:45PM +0200, Michel Dänzer wrote: > On Sam, 2010-05-29 at 10:21 +0200, Sylvain Beucler wrote: > > > > When using the R300 driver in KMS mode (current default), performances > > for 2D operations are 15x slower than without KMS mode (previous > > default). > > > > The attached simple test runs at 17FPS in KMS mode on my computer, > > against 300FPS in non-KMS mode. > > On a similar setup (RV350 in a PowerBook) here, it runs at about 60-70 > fps with compiz and just above 100 fps without compositing.
For reference I get 130 FPS on a Radeon Mobility M6 and 80 FPS on a S3 ProSavage (Lenny w/o compositing). > BTW, are your UMS numbers from driver version 6.13? Yes, I get 300FPS with: $ cat /etc/modprobe.d/radeon-kms.conf options radeon modeset=0 > With EXA or XAA? Xorg.0.log says EXA is enabled. With KMS: I tried without both, then with EXA and then with XAA. AFAICT this didn't changed the performances. I mean I used: Option "AccelMethod" "EXA" or Option "AccelMethod" "XAA" in the configuration, possibly one of them is enabled by default. > > This makes most 2D games unplayable. > > I'm not sure the test app is really representative for 'most 2D games'. Sure. 'freedink', for instance, runs at < 10 FPS at 100% CPU with KMS (vs. 60 FPS with at 75% CPU usage without KMS), which results in choppy animation and sound. The scrolling title screen 2D intro of Cytadela (which is otherwise a 3D game) is jumpy too. I realized there was a problem when working on a small test game and checking the FPS. After blaming Python and writing the C test, I had to witness Python was not faulty this time ;) > Forgot to mention: sysprof or oprofile profiles of slow and fast runs > might be interesting, at least if the CPU is pegged during the runs. Indeed CPU is at 100%. Do you have instructions on how to best run sysprof or oprofile? -- Sylvain -- To UNSUBSCRIBE, email to debian-x-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20100529114855.gc2...@perso.beuc.net
