ubuntu-x-swat team mailing list archive

["Johannes H. Jensen" <joh@xxxxxxxxxxxxxxxxx>]

Public bug reported:

I get some weird X behavior when my computer is under high I/O load. For
some reason, X struggles with rendering (I think), causing long delays
in program execution.

Steps to reproduce:

1. Start 'stress -d 2' to start hard-drive I/O 
2. In another terminal, execute 'time ls /usr/bin'
3. Watch how the ls command hangs for many seconds.

The 'hanging' sometimes occurs before any output appears, other times it
hangs in the middle of the output. The worst I've seen is 18 seconds
before the command completes. The whole terminal window also hangs at
this point.

Now I thought this was related to bug #131094, but I discovered that if
I run the same test through SSH, there's no hanging! Everything is
smooth through the SSH session. So the problem seems to be with X
rendering the output of the command in the terminal.

There seem to be no relevant entries in the logs (kern.log, syslog,
Xorg.0.log).

I've tested this with the proprietary nvidia driver, the nouveau driver
and vesa driver. I got the same problem in all three cases. Tested both
with Unity and Ubuntu Classic (no effects). I have also tried the
packages in xorg-edgers, and the problem is still there.

System information:
- Ubuntu 11.04 64bit
- NVIDIA GeForce GTS 250

I'm not sure how to debug this further. Please let me know if there's any other information you require.
--- 
.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  270.41.06  Mon Apr 18 14:53:56 PDT 2011
 GCC version:  gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,compiztoolbox,imgpng,regex,grid,unitymtgrabhandles,move,animation,session,gnomecompat,vpswitch,workarounds,resize,snap,expo,mousepoll,ezoom,wall,staticswitcher,fade,scale,unityshell]
CompositorRunning: compiz
DistUpgraded: Log time: 2011-04-01 00:04:02.963428
DistroCodename: natty
DistroRelease: Ubuntu 11.04
DistroVariant: ubuntu
DkmsStatus:
 vboxhost, 4.0.4, 2.6.38-8-generic, x86_64: installed 
 vboxhost, 4.0.4, 2.6.38-7-generic, x86_64: installed  (WARNING! Diff between built and installed module!)
 nvidia-current, 270.41.06, 2.6.38-8-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation G92 [GeForce GTS 250] [10de:0615] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: Micro-Star International Co., Ltd. Device [1462:1543]
JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, Not in use)
MachineType: System manufacturer P5K
NonfreeKernelModules: nvidia
Package: xserver-xorg-video-nv 1:2.1.17-3ubuntu7
PackageArchitecture: amd64
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=47045301-e02a-4cb1-9cfe-edbd6fc4dc1a ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Renderer: Unknown
Tags:  natty running-unity ubuntu compiz-0.9
Uname: Linux 2.6.38-8-generic x86_64
UpgradeStatus: Upgraded to natty on 2011-03-31 (59 days ago)
UserGroups: adm admin audio backuppc cdrom dialout fuse libvirtd lpadmin plugdev pulse pulse-access pulse-rt sambashare vboxusers video
dmi.bios.date: 10/14/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1201
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5K
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1201:bd10/14/2008:svnSystemmanufacturer:pnP5K:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5K
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
version.ia32-libs: ia32-libs 20090808ubuntu13
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

** Affects: xserver-xorg-video-nv (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-collected compiz-0.9 natty running-unity ubuntu

** Tags added: apport-collected compiz-0.9 natty running-unity ubuntu

** Description changed:

  I get some weird X behavior when my computer is under high I/O load. For
  some reason, X struggles with rendering (I think), causing long delays
  in program execution.
  
  Steps to reproduce:
  
  1. Start 'stress -d 2' to start hard-drive I/O 
  2. In another terminal, execute 'time ls /usr/bin'
  3. Watch how the ls command hangs for many seconds.
  
  The 'hanging' sometimes occurs before any output appears, other times it
  hangs in the middle of the output. The worst I've seen is 18 seconds
  before the command completes. The whole terminal window also hangs at
  this point.
  
  Now I thought this was related to bug #131094, but I discovered that if
  I run the same test through SSH, there's no hanging! Everything is
  smooth through the SSH session. So the problem seems to be with X
  rendering the output of the command in the terminal.
  
  There seem to be no relevant entries in the logs (kern.log, syslog,
  Xorg.0.log).
  
  I've tested this with the proprietary nvidia driver, the nouveau driver
  and vesa driver. I got the same problem in all three cases. Tested both
  with Unity and Ubuntu Classic (no effects). I have also tried the
  packages in xorg-edgers, and the problem is still there.
  
  System information:
  - Ubuntu 11.04 64bit
  - NVIDIA GeForce GTS 250
  
- I'm not sure how to debug this further. Please let me know if there's
- any other information you require.
+ I'm not sure how to debug this further. Please let me know if there's any other information you require.
+ --- 
+ .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  270.41.06  Mon Apr 18 14:53:56 PDT 2011
+  GCC version:  gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
+ Architecture: amd64
+ CompizPlugins: [core,bailer,detection,composite,opengl,decor,place,compiztoolbox,imgpng,regex,grid,unitymtgrabhandles,move,animation,session,gnomecompat,vpswitch,workarounds,resize,snap,expo,mousepoll,ezoom,wall,staticswitcher,fade,scale,unityshell]
+ CompositorRunning: compiz
+ DistUpgraded: Log time: 2011-04-01 00:04:02.963428
+ DistroCodename: natty
+ DistroRelease: Ubuntu 11.04
+ DistroVariant: ubuntu
+ DkmsStatus:
+  vboxhost, 4.0.4, 2.6.38-8-generic, x86_64: installed 
+  vboxhost, 4.0.4, 2.6.38-7-generic, x86_64: installed  (WARNING! Diff between built and installed module!)
+  nvidia-current, 270.41.06, 2.6.38-8-generic, x86_64: installed
+ GraphicsCard:
+  nVidia Corporation G92 [GeForce GTS 250] [10de:0615] (rev a2) (prog-if 00 [VGA controller])
+    Subsystem: Micro-Star International Co., Ltd. Device [1462:1543]
+ JockeyStatus: xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, Not in use)
+ MachineType: System manufacturer P5K
+ NonfreeKernelModules: nvidia
+ Package: xserver-xorg-video-nv 1:2.1.17-3ubuntu7
+ PackageArchitecture: amd64
+ ProcEnviron:
+  LANGUAGE=en_US:en
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
+ ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-8-generic root=UUID=47045301-e02a-4cb1-9cfe-edbd6fc4dc1a ro quiet splash vt.handoff=7
+ ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
+ Renderer: Unknown
+ Tags:  natty running-unity ubuntu compiz-0.9
+ Uname: Linux 2.6.38-8-generic x86_64
+ UpgradeStatus: Upgraded to natty on 2011-03-31 (59 days ago)
+ UserGroups: adm admin audio backuppc cdrom dialout fuse libvirtd lpadmin plugdev pulse pulse-access pulse-rt sambashare vboxusers video
+ dmi.bios.date: 10/14/2008
+ dmi.bios.vendor: American Megatrends Inc.
+ dmi.bios.version: 1201
+ dmi.board.asset.tag: To Be Filled By O.E.M.
+ dmi.board.name: P5K
+ dmi.board.vendor: ASUSTeK Computer INC.
+ dmi.board.version: Rev 1.xx
+ dmi.chassis.asset.tag: Asset-1234567890
+ dmi.chassis.type: 3
+ dmi.chassis.vendor: Chassis Manufacture
+ dmi.chassis.version: Chassis Version
+ dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1201:bd10/14/2008:svnSystemmanufacturer:pnP5K:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5K:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
+ dmi.product.name: P5K
+ dmi.product.version: System Version
+ dmi.sys.vendor: System manufacturer
+ version.compiz: compiz 1:0.9.4+bzr20110415-0ubuntu2
+ version.ia32-libs: ia32-libs 20090808ubuntu13
+ version.libdrm2: libdrm2 2.4.23-1ubuntu6
+ version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
+ version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
+ version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
+ version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
+ version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3
+ version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4
+ version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7
+ version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-nv in Ubuntu.
https://bugs.launchpad.net/bugs/790337

Title:
  Heavy disk I/O causes X rendering to hang