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Message #91056
[Bug 1293384] Re: Compiz CPU usage dramatically increased in Ubuntu 14.04
Similar problem here. Seeing 50% CPU when running Chromium. Using
fglrx, because FOSS drivers gave horrid responsiveness and bad video
corruption at login screen and while watching video. However, I am not
using 14.04 LTS in a virtual machine. I am using it in a Wubi install,
however, until I can buy a new computer next year.
$ sudo dmidecode | head -15
# dmidecode 2.12
SMBIOS 2.6 present.
48 structures occupying 1785 bytes.
Table at 0x0009F400.
Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
Vendor: Dell Inc.
Version: A06
Release Date: 12/01/2010
Address: 0xF0000
Runtime Size: 64 kB
ROM Size: 1024 kB
Characteristics:
PCI is supported
$ sudo lshw -C cpu
*-cpu
description: CPU
product: Pentium(R) Dual-Core CPU E6700 @ 3.20GHz
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: Pentium(R) Dual-Core CPU E6700 @ 3.20GHz
serial: To Be Filled By O.E.M.
slot: CPU 1
size: 3203MHz
capacity: 3203MHz
width: 64 bits
clock: 266MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx constant_tsc arch_perfmon pebs bts rep_good nopl aperfmperf pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm xsave lahf_lm dtherm tpr_shadow vnmi flexpriority cpufreq
configuration: cores=2 enabledcores=2 threads=2
$ sudo lshw -C video
*-display
description: VGA compatible controller
product: Juniper PRO [Radeon HD 5750]
vendor: Advanced Micro Devices, Inc. [AMD/ATI]
physical id: 0
bus info: pci@0000:01:00.0
version: 00
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver=fglrx_pci latency=0
resources: irq:47 memory:d0000000-dfffffff memory:f7ee0000-f7efffff ioport:d000(size=256) memory:f7ec0000-f7edffff
$ /usr/lib/nux/unity_support_test -p
OpenGL vendor string: ATI Technologies Inc.
OpenGL renderer string: AMD Radeon HD 5700 Series
OpenGL version string: 4.3.12798 Compatibility Profile Context 13.35.1005
Not software rendered: yes
Not blacklisted: yes
GLX fbconfig: yes
GLX texture from pixmap: yes
GL npot or rect textures: yes
GL vertex program: yes
GL fragment program: yes
GL vertex buffer object: yes
GL framebuffer object: yes
GL version is 1.4+: yes
Unity 3D supported: yes
--
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
