OK, So I've finally been able to do a bit of testing with Ubuntu 14.04 If run without 3d support on llvmpipe, it's very CPU-hungry. A bit more so than Ubuntu 13.04 AFAICT. For Ubuntu on VMware this becomes troublesome primarily on ESX, but the problems were introduced with the drop of Unity 2D. I haven't dug thoroughly into why it hurts so much on ESX. Could it perhaps be that Unity / Compiz is performing full-screen flips when only a part of the screen is updated?
Also we have severe performance problems when running fully 3D accelerated with workstation / fusion on multi-monitor setups. That's partly due to how the VMware device updates screens but Ubunut 14.04 stands out as particularly slow here. Also needs further investigation... /Thomas -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to compiz in Ubuntu. https://bugs.launchpad.net/bugs/1293384 Title: Compiz CPU usage dramatically increased in Ubuntu 14.04 Status in Compiz: Triaged Status in “compiz” package in Ubuntu: Triaged Bug description: It appears that the workload of low-level graphical operations used by compiz when, for example, moving windows has increased dramatically between Ubuntu 12.04 and Ubuntu 14.04. This might not be that visible when using high-end gpus, but should be clearly visible when using compiz on llvmpipe and to some-extent invalidates the approach of using compiz on top of llvmpipe as a fallback when no GPU is available: How to reproduce: 1) Use the unity-3d desktop in Ubuntu 14.04 on top of a non-accelerating Xorg driver like "modesetting". Move windows around. Note peak and average cpu-usage. How to verify compiz is the culprit: 1) copy /usr/bin/compiz from a Ubuntu 12.04 installation. Drop it in as /usr/bin/compiz on 14.04. Reboot. Perform the same window movement. CPU-usage should be substantially lower. This problem also affects VMs running on VMware ESX with a software- rendering GPU. Window movement becomes sluggish, which suggests that even with GPUs, compiz has increased the number of operations required to move windows. To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1293384/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
