** Description changed: I am wiping a SATA disk which is attached via USB in an enclosure. I'm running this command:- root@deep-thought:~# dd if=/dev/zero bs=512M | pv -s 250059350016 -petr > /dev/sdb Whilst running I note significant IO wait on all cores. This means the desktop becomes very slow and at times completely unresponsive. Applications go grey as they wait and sometimes the mouse cursor doesn't even move. - top - 14:55:26 up 21:31, 4 users, load average: 4.12, 3.80, 3.73 - Tasks: 215 total, 2 running, 212 sleeping, 0 stopped, 1 zombie - Cpu0 : 21.8%us, 5.1%sy, 0.0%ni, 69.5%id, 2.5%wa, 0.0%hi, 1.1%si, 0.0%st - Cpu1 : 5.6%us, 5.2%sy, 0.0%ni, 89.2%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st - Cpu2 : 23.3%us, 2.0%sy, 0.0%ni, 55.1%id, 19.3%wa, 0.0%hi, 0.3%si, 0.0%st - Cpu3 : 8.6%us, 3.3%sy, 0.0%ni, 16.6%id, 71.1%wa, 0.0%hi, 0.3%si, 0.0%st - Mem: 8058844k total, 7924184k used, 134660k free, 2157808k buffers - Swap: 8267772k total, 12164k used, 8255608k free, 2208596k cached + top - 15:58:04 up 22:34, 5 users, load average: 3.11, 2.54, 2.04 + Tasks: 201 total, 1 running, 199 sleeping, 0 stopped, 1 zombie + Cpu0 : 6.2%us, 4.0%sy, 0.0%ni, 51.5%id, 36.8%wa, 0.0%hi, 1.5%si, 0.0%st + Cpu1 : 1.0%us, 6.1%sy, 0.0%ni, 44.9%id, 48.0%wa, 0.0%hi, 0.0%si, 0.0%st + Cpu2 : 8.2%us, 1.4%sy, 0.0%ni, 36.6%id, 53.8%wa, 0.0%hi, 0.0%si, 0.0%st + Cpu3 : 2.0%us, 1.0%sy, 0.0%ni, 67.2%id, 29.7%wa, 0.0%hi, 0.0%si, 0.0%st + Mem: 8058844k total, 7915428k used, 143416k free, 3348052k buffers + Swap: 8267772k total, 12040k used, 8255732k free, 2043248k cached ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-image-3.2.0-27-generic 3.2.0-27.43 ProcVersionSignature: Ubuntu 3.2.0-27.43-generic 3.2.21 Uname: Linux 3.2.0-27-generic x86_64 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu11 Architecture: amd64 ArecordDevices: - **** List of CAPTURE Hardware Devices **** - card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] - Subdevices: 1/1 - Subdevice #0: subdevice #0 + **** List of CAPTURE Hardware Devices **** + card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] + Subdevices: 1/1 + Subdevice #0: subdevice #0 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC0: alan 2296 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC0: alan 2296 F.... pulseaudio Card0.Amixer.info: - Card hw:0 'PCH'/'HDA Intel PCH at 0xf2620000 irq 52' - Mixer name : 'Intel CougarPoint HDMI' - Components : 'HDA:14f1506e,17aa21da,00100002 HDA:80862805,80860101,00100000' - Controls : 27 - Simple ctrls : 9 + Card hw:0 'PCH'/'HDA Intel PCH at 0xf2620000 irq 52' + Mixer name : 'Intel CougarPoint HDMI' + Components : 'HDA:14f1506e,17aa21da,00100002 HDA:80862805,80860101,00100000' + Controls : 27 + Simple ctrls : 9 Card29.Amixer.info: - Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' - Mixer name : 'ThinkPad EC (unknown)' - Components : '' - Controls : 1 - Simple ctrls : 1 + Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' + Mixer name : 'ThinkPad EC (unknown)' + Components : '' + Controls : 1 + Simple ctrls : 1 Card29.Amixer.values: - Simple mixer control 'Console',0 - Capabilities: pswitch pswitch-joined penum - Playback channels: Mono - Mono: Playback [on] + Simple mixer control 'Console',0 + Capabilities: pswitch pswitch-joined penum + Playback channels: Mono + Mono: Playback [on] Date: Sun Jul 29 14:48:41 2012 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=4de844e6-b3a9-4309-bc26-739bea6b4146 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) MachineType: LENOVO 4287CTO ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic root=UUID=c8438547-b9fb-46af-8012-4663c77c70e7 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.2.0-27-generic N/A - linux-backports-modules-3.2.0-27-generic N/A - linux-firmware 1.79 + linux-restricted-modules-3.2.0-27-generic N/A + linux-backports-modules-3.2.0-27-generic N/A + linux-firmware 1.79 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 09/15/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 8DET52WW (1.22 ) dmi.board.asset.tag: Not Available dmi.board.name: 4287CTO dmi.board.vendor: LENOVO dmi.board.version: Not Available dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Not Available dmi.modalias: dmi:bvnLENOVO:bvr8DET52WW(1.22):bd09/15/2011:svnLENOVO:pn4287CTO:pvrThinkPadX220:rvnLENOVO:rn4287CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4287CTO dmi.product.version: ThinkPad X220 dmi.sys.vendor: LENOVO
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1030516 Title: 152d:2338 High IO when writing to USB devices To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1030516/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
