With the rhythmbox window open and rhythmbox playing a song (and the slider slowly moving from left to right), but with the rhythmbox window _NOT_ visible, compiz consumes ~10% CPU constantly (Firefox at full screen, two gnome terminals [top & dstack] in front of it).
dstack seemed to indicate that "waitforvideosync" (sp?) is (almost, behind some fglrx calls, and ioctl at the very top) at the top of the stack pretty often. That's expected I guess, but I wasn't sure if ioctl can be used to block a thread, so I unchecked the vsync option in ccsm. compiz CPU usage is now down to ~3% with vsync disabled and rhythmbox not visible. slow scrolling in firefox with vsync enabled: ~50% compiz CPU usage slow scrolling in firefox with vsync disabled: ~16% compiz CPU usage I'm not sure what to think of this. Busy waiting for vsync in fglrx? Or is the lower CPU usage just some side-effect in compiz caused by disabling vsync? Daniel, thanks for your efforts to improve compiz. :-) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/803943 Title: compiz consuming a lot of cpu To manage notifications about this bug go to: https://bugs.launchpad.net/compiz-core/+bug/803943/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs