Ilya Murav'jov, thank you for performing the requested tests. Just to
confirm, this problem is reproducible with the i386 iso, and upstream
kernel, but not the amd64 iso and upstream kernel correct?
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1264707
Title:
IO limit 1.2 MB/s for 32bit ubuntu
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
I recently installed a new motherboard Asus M5A99FX PRO R2.0 and found out
that IO speed is very low; i.e. the dd command output:
dd if=/dev/zero of=/tmp/output bs=8k count=1000k
^C13885+0 records in
13885+0 records out
113745920 bytes (114 MB) copied, 99.6639 s, 1.1 MB/s
This issue is reproducing with my new SSD (with ext4), my USB drives
and my hard disk (with ext4) from Ubuntu i386, 13.04 and 13.10. Such a
speed is not ok, awfully slow. When I run two or more the same dd
commands simultaneously, I have 1,2 Mb/s for every process.
WORKAROUND: I have no such problems with the same IO stuff when
loading Ubuntu Live 13.10 amd64, i.e. dd reports speed >= 400Mb/s for
my SSD disk .
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-3.11.0-12-generic 3.11.0-12.19
ProcVersionSignature: Ubuntu 3.11.0-12.19-generic 3.11.3
Uname: Linux 3.11.0-12-generic i686
ApportVersion: 2.12.5-0ubuntu2
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC2: ubuntu 4507 F.... pulseaudio
/dev/snd/controlC1: ubuntu 4507 F.... pulseaudio
/dev/snd/controlC0: ubuntu 4507 F.... pulseaudio
CasperVersion: 1.336ubuntu1
Date: Sat Dec 28 15:56:33 2013
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
LiveMediaBuild: Ubuntu 13.10 "Saucy Salamander" - Release i386 (20131016.1)
MachineType: To be filled by O.E.M. To be filled by O.E.M.
MarkForUpload: True
ProcEnviron:
LANGUAGE=en_US
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: noprompt cdrom-detect/try-usb=true persistent
file=/cdrom/preseed/hostname.seed boot=casper initrd=/casper/initrd.lz quiet
splash -- maybe-ubiquity
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not
accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.11.0-12-generic N/A
linux-backports-modules-3.11.0-12-generic N/A
linux-firmware 1.116
RfKill:
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/10/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1708
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: M5A99FX PRO R2.0
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1708:bd04/10/2013:svnTobefilledbyO.E.M.:pnTobefilledbyO.E.M.:pvrTobefilledbyO.E.M.:rvnASUSTeKCOMPUTERINC.:rnM5A99FXPROR2.0:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: To be filled by O.E.M.
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