Public bug reported:
I'm using Unity with Natty in 64 bits kernel.
I'm not pretty sure this issue is kernel related but since the problem
seems to be the WA (so IOPS workload), it may be.
Problem description :
- I have a 1,1GB LZMA compressed file onto a vfat USB storage device
- I launch a shell (guake - bash) and launch a "tar -xvf file.lzma" so the file
is decompressed directly onto the USB storage device
- Then my desktop is almost freezed
- a top tells me my CPU is overloaded because of the IOPS waiting time :
top - 11:10:42 up 22:38, 1 user, load average: 5.77, 5.88, 3.67
Tasks: 201 total, 2 running, 194 sleeping, 0 stopped, 5 zombie
Cpu(s): 5.0%us, 3.7%sy, 0.0%ni, 4.1%id, 86.9%wa, 0.0%hi, 0.3%si, 0.0%st
Mem: 3957404k total, 3922740k used, 34664k free, 37792k buffers
Swap: 6143996k total, 521680k used, 5622316k free, 359436k cached
Expected behavior
I know that USB storage devices are generally very slow so I can understand
that the job takes some times, but it should not makes the Unity Desktop
unusable.
Regards,
nm
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-2.6.38-8-generic 2.6.38-8.42
ProcVersionSignature: Ubuntu 2.6.38-8.42-generic 2.6.38.2
Uname: Linux 2.6.38-8-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
AplayDevices:
**** List of PLAYBACK Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
Subdevices: 2/2
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path',
'/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/hwC0D1',
'/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer']
failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xd8900000 irq 48'
Mixer name : 'Analog Devices AD1984A'
Components : 'HDA:11d4194a,103c30e6,00100400
HDA:11c11040,103c1378,00100200'
Controls : 18
Simple ctrls : 11
Date: Thu May 5 11:12:48 2011
HibernationDevice: RESUME=UUID=b24beccd-9cd6-44dc-9f80-7fa5a2a33b0c
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: Hewlett-Packard HP Compaq 6730b
ProcEnviron:
LANGUAGE=en_US:en
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.38-8-generic
root=UUID=0f402fa7-d2f0-4138-97b3-2ad31dcd5b7b ro splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-2.6.38-8-generic N/A
linux-backports-modules-2.6.38-8-generic N/A
linux-firmware 1.52
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-04-29 (6 days ago)
dmi.bios.date: 12/08/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68PDD Ver. F.13
dmi.board.name: 30DD
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 96.22
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvr68PDDVer.F.13:bd12/08/2009:svnHewlett-Packard:pnHPCompaq6730b:pvrF.13:rvnHewlett-Packard:rn30DD:rvrKBCVersion96.22:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq 6730b
dmi.product.version: F.13
dmi.sys.vendor: Hewlett-Packard
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug natty running-unity
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https://bugs.launchpad.net/bugs/777685
Title:
Unity Desktop is very slow (almost freezed) when decompressing with
tar a LZMA file onto a USB Device in vfat
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