-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Michel Dänzer wrote: > On Thu, 2009-12-10 at 00:45 +0100, Ancoron Luciferis wrote: >> I have a machine with two user accounts under Kubuntu 9.10 and the >> performance difference I am experiencing is measurable. The first user >> account (set up during installation time) works good. Glxgears is around >> 4000 FPS, video playback is fine, compositing is fine (especially the >> desktop cube is fast as hell and really smooth). >> >> On the other hand there is a second user account (this one is not in the >> admin group but basic setup is the same). In that user account I get >> only around 2700 FPS, compositing works fine (the cube is still that >> fast) but moving windows around is dead slow and video playback is NOT >> "tear-free". The rather strange thing is that it doesn't depend on video >> source frame size or codec or scaled frame size, the playback is just >> dropping frames especially when there is a lot of movement. >> >> Turning off the compositing results in a fast user experience but since >> it is fast with compositing for the first user I expected it to be the >> same for the second one. >> >> CPU usage is not the problem as the quad-core machine is idling around >> between 70% and 90% although Xorg is between 30 and 50% and mplayer >> between 1% and 26% (peeks up to 47%) when watching a movie. >> >> System: >> - - AMD Athlon II X4 620 >> - - 4GB RAM >> - - Radeon X1950XTX >> - - Dell 3007WFP-HC 30" @ 2560x1600 >> >> This doesn't make sense for me at all. >> >> Can someone shed some light on this? > > Have you tried comparing e.g. the glxinfo output between the two > accounts? > >
'glxinfo -v' yields the exact same results under both user accounts. I found out what caused the dramatic performance lag: amor The second user is running the small cat 'neko'. When disabled, the user experience is the same as it is with the first user. glxgears with amor running: 13931 frames in 5.0 seconds = 2786.095 FPS 13475 frames in 5.0 seconds = 2694.940 FPS 13110 frames in 5.0 seconds = 2616.737 FPS 13515 frames in 5.0 seconds = 2702.943 FPS 16012 frames in 5.0 seconds = 3202.190 FPS 14027 frames in 5.0 seconds = 2795.201 FPS 15920 frames in 5.0 seconds = 3180.834 FPS 13449 frames in 5.0 seconds = 2689.747 FPS glxgears without amor: 19291 frames in 5.0 seconds = 3858.148 FPS 20093 frames in 5.0 seconds = 4018.454 FPS 20013 frames in 5.0 seconds = 4002.501 FPS 20895 frames in 5.0 seconds = 4178.815 FPS 20834 frames in 5.0 seconds = 4166.731 FPS 20168 frames in 5.0 seconds = 4033.281 FPS 20572 frames in 5.0 seconds = 4114.335 FPS 20308 frames in 5.0 seconds = 4061.359 FPS Also the video playback is smooth as it should be (even with 1920x1080 content) and moving windows around is as fast as with the first user account. But this is still a bit strange to me, as the CPU usage for that amor is nearly 0% all the time. So it must somehow interfere the rendering pipeline. Could this still be an issue in the driver? Thanx, Ancoron -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAksizRUACgkQHwxOsqv2bG0F7QCffbcx+3dXXsxRM64Uqb148iFV u18AoLm8CotZTmThMaYTBIH8TtWW2OUg =HKWj -----END PGP SIGNATURE----- _______________________________________________ xorg-driver-ati mailing list [email protected] http://lists.x.org/mailman/listinfo/xorg-driver-ati
