compiz team mailing list archive

[Marc Bowes <884387@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

Since upgrading from 11.04 to 11.10, I've noticed incredibly poor
performance with Compiz and progress bars. For example, I just attempted
a network copy of a directory of files (10's of them). My computer
ground to a halt while the copy went, but as soon as I minimized the
progress bar things improved dramatically.

Curious, I peeked at `strace` and noticed it is spinning on reading from
a UNIX socket, receiving several EAGAIN's for each successful read. If I
maximize the progress bar, there are additional reads (some successful,
some EAGAIN) as well as poll() and sched_yield() calls. This behavior is
consistently reproducible and results in a 10% increase in CPU load by
compiz when the progress bar is maximized.

I will attach the two straces as well as a lsof. Opening them side-by-
side with a difftool such as meld clearly shows the additional system
calls being made when the window is maximized (which is when my system
effectively became uselessly slow).

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity 4.24.0-0ubuntu2b1
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module  280.13  Wed Jul 27 16:53:56 PDT 2011
 GCC version:  gcc version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3)
.tmp.unity.support.test.0:
 
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,place,session,snap,gnomecompat,regex,move,mousepoll,animation,wall,fade,grid,vpswitch,resize,imgpng,scale,workarounds,expo,ezoom,unitymtgrabhandles,unityshell]
CompositorRunning: compiz
CurrentDmesg:
 [   26.978072] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
 [   27.754662] EXT4-fs (sdc1): re-mounted. Opts: errors=remount-ro,commit=0
 [   28.235217] init: plymouth-stop pre-start process (1330) terminated with status 1
 [   33.734637] EXT4-fs (sdc1): re-mounted. Opts: errors=remount-ro,commit=0
 [   37.144030] eth0: no IPv6 routers present
Date: Mon Oct 31 21:24:39 2011
DistUpgraded: Log time: 2011-10-13 21:06:09.956598
DistroCodename: oneiric
DistroVariant: ubuntu
DkmsStatus:
 nvidia-173, 173.14.30, 2.6.38-11-generic, x86_64: installed
 nvidia-173, 173.14.30, 3.0.0-12-generic, x86_64: installed
 nvidia-current, 280.13, 2.6.38-11-generic, x86_64: installed
 nvidia-current, 280.13, 3.0.0-12-generic, x86_64: installed
ExecutablePath: /usr/bin/compiz
GraphicsCard:
 nVidia Corporation G80 [GeForce 8800 GTX] [10de:0191] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Giga-byte Technology Device [1458:3439]
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MachineType: Gigabyte Technology Co., Ltd. EP45-DQ6
ProcEnviron:
 LANGUAGE=en_ZA:en
 PATH=(custom, no user)
 LANG=en_ZA.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=6269bff0-61a9-4445-8224-e7e8db733842 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: Upgraded to oneiric on 2011-10-14 (17 days ago)
dmi.bios.date: 09/30/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F12
dmi.board.name: EP45-DQ6
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: x.x
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF12:bd09/30/2008:svnGigabyteTechnologyCo.,Ltd.:pnEP45-DQ6:pvr:rvnGigabyteTechnologyCo.,Ltd.:rnEP45-DQ6:rvrx.x:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: EP45-DQ6
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
version.compiz: compiz 1:0.9.6+bzr20110929-0ubuntu5
version.ia32-libs: ia32-libs 20090808ubuntu26
version.libdrm2: libdrm2 2.4.26-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 7.11-0ubuntu3
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.11-0ubuntu3
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+7ubuntu7
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.6.0-1ubuntu13
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.99~git20110811.g93fc084-0ubuntu1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.15.901-1ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110411+8378443-1

** Affects: compiz (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug compiz-0.9 oneiric running-unity ubuntu

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https://bugs.launchpad.net/bugs/884387

Title:
  Compiz is absurdly heavy on CPU

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