Emmanuel Stapf [ES], regarding the other hardware, please file a new report so
it may be tracked:
ubuntu-bug linux
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1388276
Title:
14.10 about 2 to 3 times slower to perform concurrent tasks
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
I've just upgraded two servers to use 14.10 (they were before at 14.04) and
found that my builds were taking much longer:
- A jenkins regression test suite that took about 135 minutes is now taking
about 300 minutes.
- A C complation tasks which took the following amount of time (time from
tcsh):
419.633u 9.471s 1:36.78 443.3% 0+0k 0+166968io 0pf+0w
is now taking
519.637u 11.022s 4:42.80 187.6% 0+0k 0+176216io 0pf+0w
Both tasks are heavily using all the available cores of the processor.
In one case it is a dual socket E5420 ( 8 cores), in another case it
is a virtualized 8 cores E5645.
I first thought it could be the new version of gcc (4.9) since both
tasks involves a lot of C compilation. Although gcc 4.9 is slower (3s
vs 2.8s in my own tests) it is not enough to explain the difference. I
actually also tried using gcc 4.8 and 4.7 with the same performance
degradation.
I unfortunately do not have a 14.04 server to which I can compare the
results to see where the difference is in terms of performance.
Is anyone observing the same behavior?
---
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.10
HibernationDevice: RESUME=UUID=9a90cb5e-bce2-49fc-8c26-8f3d23bce997
InstallationDate: Installed on 2012-05-15 (899 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64
(20120424.1)
IwConfig:
eth0 no wireless extensions.
eth1 no wireless extensions.
lo no wireless extensions.
MachineType: System manufacturer System Product Name
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=vt100
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/usr/bin/tcsh
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic
root=UUID=14f555da-6c91-4091-9976-f16962890c86 ro
ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.13.0-37-generic N/A
linux-backports-modules-3.13.0-37-generic N/A
linux-firmware 1.138
RfKill: Error: [Errno 2] No such file or directory
Tags: utopic utopic
Uname: Linux 3.13.0-37-generic x86_64
UnreportableReason: The report belongs to a package that is not installed.
UpgradeStatus: Upgraded to utopic on 2014-10-28 (3 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/13/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 1004
dmi.board.name: DSBF-DE
dmi.board.vendor: ASUSTek Computer Inc.
dmi.board.version: REV : 1.xxG
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr1004:bd12/13/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTekComputerInc.:rnDSBF-DE:rvrREV1.xxG:cvnChassisManufacture:ct1:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
---
AlsaDevices: Error: command ['ls', '-l', '/dev/snd/'] failed with exit code
2: ls: cannot access /dev/snd/: No such file or directory
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
CRDA: Error: [Errno 2] No such file or directory
DistroRelease: Ubuntu 14.10
HibernationDevice: RESUME=UUID=9a90cb5e-bce2-49fc-8c26-8f3d23bce997
InstallationDate: Installed on 2012-05-15 (899 days ago)
InstallationMedia: Ubuntu-Server 12.04 LTS "Precise Pangolin" - Release amd64
(20120424.1)
IwConfig:
eth0 no wireless extensions.
eth1 no wireless extensions.
lo no wireless extensions.
MachineType: System manufacturer System Product Name
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=vt100
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=C
SHELL=/usr/bin/tcsh
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic
root=UUID=14f555da-6c91-4091-9976-f16962890c86 ro
ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-3.16.0-23-generic N/A
linux-backports-modules-3.16.0-23-generic N/A
linux-firmware 1.138
RfKill: Error: [Errno 2] No such file or directory
Tags: utopic
Uname: Linux 3.16.0-23-generic x86_64
UpgradeStatus: Upgraded to utopic on 2014-10-28 (3 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/13/2007
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: 1004
dmi.board.name: DSBF-DE
dmi.board.vendor: ASUSTek Computer Inc.
dmi.board.version: REV : 1.xxG
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 1
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnPhoenixTechnologiesLTD:bvr1004:bd12/13/2007:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTekComputerInc.:rnDSBF-DE:rvrREV1.xxG:cvnChassisManufacture:ct1:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1388276/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : kernel-packages@lists.launchpad.net
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
