Public bug reported:
When I play a video or open an opengl game and then open the dash or
press the Super-Key until the Dash-Help appears, then the CPU usage is
utilized heavily while the HUD shows up, when I expected no increased
CPU usage after the transitition (which is sluggish by the way), because
no additional operations on the CPU need to be done after the dash help
is opened. The only thing I can think of is transparency which needs to
be calculated, because the video is playing always needs to be updated,
but this shouldn't increase CPU usage, because it _should_ take place on
the GPU for being a purely graphical operation which my graphics can do
easily (blur inclusive).
The CPU utilization is lower if you switch from blur to no blur, so this
fortifies my assumption that the actual graphical transparency
calculation takes place on the CPU or that some ping pong effect moves
buffers from GPU to CPU and back, slowing things down, i don't know
after all.
Playing a video increases compiz CPU utilization from ~5 to ~20 and and
Xorg cpu utilization from ~5 to ~28
Also the FPS of video games decreases when the dash is activated, with
blur even more.
Last but not least, when I playback a video and activate the dash or the
dash help the video shortly interrupts for about ~200ms.
For comparison:
The single-parameter transparency of the compiz-plugin "Opacity, Brightness and
Saturation" does not affect CPU usage at all, at least not visibly.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.12-0ubuntu1.1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Ist ein Verzeichnis:
'/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
NVRM version: NVIDIA UNIX x86_64 Kernel Module 295.49 Mon Apr 30 23:46:33
PDT 2012
GCC version: gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
.tmp.unity.support.test.0:
ApportVersion: 2.0.1-0ubuntu8
Architecture: amd64
CompizPlugins:
[core,composite,opengl,decor,gnomecompat,place,move,snap,mousepoll,resize,compiztoolbox,imgpng,vpswitch,session,grid,regex,wall,unitymtgrabhandles,animation,expo,ezoom,workarounds,fade,scale,unityshell]
CompositorRunning: compiz
Date: Sat Jun 9 16:02:48 2012
DistUpgraded: Fresh install
DistroCodename: precise
DistroVariant: ubuntu
DkmsStatus:
nvidia-current, 295.40, 3.2.0-24-generic, x86_64: installed
nvidia-current-updates, 295.49, 3.2.0-24-generic, x86_64: installed
GraphicsCard:
NVIDIA Corporation G98M [GeForce G 105M] [10de:06ec] (rev a1) (prog-if 00 [VGA
controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0205]
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64
(20120425)
JockeyStatus:
xorg:nvidia_current - Beschleunigter Grafiktreiber von NVIDIA (Proprietär,
Deaktiviert, Nicht benutzt)
xorg:nvidia_current_updates - NVIDIAs beschleunigte Grafiktreiber
(Nachträgliche Aktualisierungen) (Proprietär, Aktiviert, In Benutzung)
MachineType: Acer Aspire 5738
ProcEnviron:
LANGUAGE=de_CH:de
PATH=(custom, user)
LANG=de_CH.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic
root=UUID=954648ee-fb9c-484d-bda9-6e49dc0e779a ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
XorgConf:
Section "Device"
Identifier "Default Device"
Option "NoLogo" "True"
EndSection
dmi.bios.date: 02/20/2009
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.03
dmi.board.name: JV50
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvrV1.03:bd02/20/2009:svnAcer:pnAspire5738:pvr0100:rvnAcer:rnJV50:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5738
dmi.product.version: 0100
dmi.sys.vendor: Acer
version.compiz: compiz 1:0.9.7.8-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.32-1ubuntu1
version.libgl1-mesa-dri: libgl1-mesa-dri 8.0.2-0ubuntu3.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 8.0.2-0ubuntu3.1
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg-core: xserver-xorg-core 2:1.11.4-0ubuntu10.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.7.0-0ubuntu1
version.xserver-xorg-video-ati: xserver-xorg-video-ati
1:6.14.99~git20111219.aacbd629-0ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.17.0-1ubuntu4
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau
1:0.0.16+git20111201+b5534a1-1build2
** Affects: unity (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug compiz-0.9 precise ubuntu
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1010898
Title:
unity transparency seems to use CPU
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1010898/+subscriptions
--
ubuntu-bugs mailing list
ubuntu-bugs@lists.ubuntu.com
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
