| 2012-09-30 02:28:17 |
Dave Johansen |
bug |
|
|
added bug |
| 2012-09-30 02:31:09 |
Brad Figg |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2012-09-30 02:59:57 |
Dave Johansen |
tags |
|
apport-collected precise running-unity staging |
|
| 2012-09-30 02:59:58 |
Dave Johansen |
description |
I noticed the results of this blog post:
http://mr-edd.co.uk/blog/sad_state_of_osx_pthread_mutex_t
and I was curious if the same sort of issue existed with the linux kernel and if it would shed any light on Bug #1058854
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1058854
The results don't appear to be as bad as those seen on Mac OS X, but they definitely are a lot poorer than I expected/hoped they would be. The code that builds on Linux is now available on that blog port and I created a git repo with the history here:
https://github.com/daveisfera/test_mutex
Here are the results from running it on the the same HP Pavilion dm4 that as the results from Bug #1058854:
mutex
1 thread real 0m 0.514s user 0m 0.512s sys 0m 0.000s
2 threads real 0m 4.382s user 0m 5.176s sys 0m 3.544s
4 threads real 0m 9.953s user 0m 9.709s sys 0m22.417s
8 threads real 0m20.984s user 0m14.973s sys 1m 8.256s
16 threads real 0m38.725s user 0m28.426s sys 2m 5.484s
benaphore
1 thread real 0m 0.324s user 0m 0.312s sys 0m 0.008s
2 threads real 0m 6.372s user 0m 6.380s sys 0m 5.572s
4 threads real 0m17.820s user 0m12.273s sys 0m42.495s
8 threads real 0m40.266s user 0m25.626s sys 2m14.400s
16 threads real 1m40.090s user 0m52.939s sys 5m45.802s
mutex2
1 thread real 0m 0.325s user 0m 0.320s sys 0m 0.004s
2 threads real 0m 0.730s user 0m 0.816s sys 0m 0.384s
4 threads real 0m 2.328s user 0m 3.388s sys 0m 5.704s
8 threads real 0m 4.096s user 0m 5.328s sys 0m10.705s
16 threads real 0m 7.584s user 0m 9.609s sys 0m20.401s |
I noticed the results of this blog post:
http://mr-edd.co.uk/blog/sad_state_of_osx_pthread_mutex_t
and I was curious if the same sort of issue existed with the linux kernel and if it would shed any light on Bug #1058854
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1058854
The results don't appear to be as bad as those seen on Mac OS X, but they definitely are a lot poorer than I expected/hoped they would be. The code that builds on Linux is now available on that blog port and I created a git repo with the history here:
https://github.com/daveisfera/test_mutex
Here are the results from running it on the the same HP Pavilion dm4 that as the results from Bug #1058854:
mutex
1 thread real 0m 0.514s user 0m 0.512s sys 0m 0.000s
2 threads real 0m 4.382s user 0m 5.176s sys 0m 3.544s
4 threads real 0m 9.953s user 0m 9.709s sys 0m22.417s
8 threads real 0m20.984s user 0m14.973s sys 1m 8.256s
16 threads real 0m38.725s user 0m28.426s sys 2m 5.484s
benaphore
1 thread real 0m 0.324s user 0m 0.312s sys 0m 0.008s
2 threads real 0m 6.372s user 0m 6.380s sys 0m 5.572s
4 threads real 0m17.820s user 0m12.273s sys 0m42.495s
8 threads real 0m40.266s user 0m25.626s sys 2m14.400s
16 threads real 1m40.090s user 0m52.939s sys 5m45.802s
mutex2
1 thread real 0m 0.325s user 0m 0.320s sys 0m 0.004s
2 threads real 0m 0.730s user 0m 0.816s sys 0m 0.384s
4 threads real 0m 2.328s user 0m 3.388s sys 0m 5.704s
8 threads real 0m 4.096s user 0m 5.328s sys 0m10.705s
16 threads real 0m 7.584s user 0m 9.609s sys 0m20.401s
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu13
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: dlj 1876 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xc0800000 irq 50'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:111d76e0,103c1793,00100102 HDA:80862805,103c1793,00100000'
Controls : 22
Simple ctrls : 10
DistroRelease: Ubuntu 12.04
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MachineType: Hewlett-Packard HP Pavilion dm4 Notebook PC
Package: linux (not installed)
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-31-generic root=UUID=162256F02256D479 loop=/hostname/disks/root.disk ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.2.0-31.50-generic 3.2.28
RelatedPackageVersions:
linux-restricted-modules-3.2.0-31-generic N/A
linux-backports-modules-3.2.0-31-generic N/A
linux-firmware 1.79.1
StagingDrivers: rts_pstor mei
Tags: precise running-unity staging
Uname: Linux 3.2.0-31-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
dmi.bios.date: 01/17/2012
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: F.08
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: 1793
dmi.board.vendor: Hewlett-Packard
dmi.board.version: 41.1C
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnHewlett-Packard:bvrF.08:bd01/17/2012:svnHewlett-Packard:pnHPPaviliondm4NotebookPC:pvr068E100002204710000622100:rvnHewlett-Packard:rn1793:rvr41.1C:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Pavilion dm4 Notebook PC
dmi.product.version: 068E100002204710000622100
dmi.sys.vendor: Hewlett-Packard |
|
| 2012-09-30 03:00:01 |
Dave Johansen |
attachment added |
|
AcpiTables.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356927/+files/AcpiTables.txt |
|
| 2012-09-30 03:00:03 |
Dave Johansen |
attachment added |
|
AlsaDevices.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356928/+files/AlsaDevices.txt |
|
| 2012-09-30 03:00:57 |
Dave Johansen |
attachment added |
|
AplayDevices.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356929/+files/AplayDevices.txt |
|
| 2012-09-30 03:00:59 |
Dave Johansen |
attachment added |
|
BootDmesg.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356930/+files/BootDmesg.txt |
|
| 2012-09-30 03:01:01 |
Dave Johansen |
attachment added |
|
CRDA.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356931/+files/CRDA.txt |
|
| 2012-09-30 03:01:04 |
Dave Johansen |
attachment added |
|
Card0.Amixer.values.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356932/+files/Card0.Amixer.values.txt |
|
| 2012-09-30 03:01:57 |
Dave Johansen |
attachment added |
|
Card0.Codecs.codec.0.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356934/+files/Card0.Codecs.codec.0.txt |
|
| 2012-09-30 03:02:00 |
Dave Johansen |
attachment added |
|
Card0.Codecs.codec.3.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356935/+files/Card0.Codecs.codec.3.txt |
|
| 2012-09-30 03:02:02 |
Dave Johansen |
attachment added |
|
CurrentDmesg.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356936/+files/CurrentDmesg.txt |
|
| 2012-09-30 03:02:04 |
Dave Johansen |
attachment added |
|
IwConfig.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356937/+files/IwConfig.txt |
|
| 2012-09-30 03:02:07 |
Dave Johansen |
attachment added |
|
Lspci.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356946/+files/Lspci.txt |
|
| 2012-09-30 03:02:08 |
Dave Johansen |
attachment added |
|
Lsusb.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356947/+files/Lsusb.txt |
|
| 2012-09-30 03:02:11 |
Dave Johansen |
attachment added |
|
PciMultimedia.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356948/+files/PciMultimedia.txt |
|
| 2012-09-30 03:02:12 |
Dave Johansen |
attachment added |
|
ProcCpuinfo.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356949/+files/ProcCpuinfo.txt |
|
| 2012-09-30 03:02:14 |
Dave Johansen |
attachment added |
|
ProcInterrupts.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356950/+files/ProcInterrupts.txt |
|
| 2012-09-30 03:02:17 |
Dave Johansen |
attachment added |
|
ProcModules.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356951/+files/ProcModules.txt |
|
| 2012-09-30 03:02:19 |
Dave Johansen |
attachment added |
|
PulseList.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356952/+files/PulseList.txt |
|
| 2012-09-30 03:02:20 |
Dave Johansen |
attachment added |
|
RfKill.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356953/+files/RfKill.txt |
|
| 2012-09-30 03:02:23 |
Dave Johansen |
attachment added |
|
UdevDb.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356954/+files/UdevDb.txt |
|
| 2012-09-30 03:02:26 |
Dave Johansen |
attachment added |
|
UdevLog.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356955/+files/UdevLog.txt |
|
| 2012-09-30 03:02:29 |
Dave Johansen |
attachment added |
|
WifiSyslog.txt https://bugs.launchpad.net/bugs/1058864/+attachment/3356956/+files/WifiSyslog.txt |
|
| 2012-09-30 03:03:28 |
Dave Johansen |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2012-10-01 15:05:00 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2012-10-01 15:05:11 |
Joseph Salisbury |
tags |
apport-collected precise running-unity staging |
apport-collected needs-upstream-testing precise running-unity staging |
|
| 2012-10-02 11:48:55 |
Dave Johansen |
tags |
apport-collected needs-upstream-testing precise running-unity staging |
apport-collected kernel-bug-exists-upstream precise running-unity staging |
|
| 2014-01-01 08:09:30 |
penalvch |
linux (Ubuntu): status |
Confirmed |
Incomplete |
|
| 2014-01-02 19:18:48 |
penalvch |
linux (Ubuntu): importance |
Medium |
Low |
|
| 2014-01-02 19:18:48 |
penalvch |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
