Sworddragon, as per http://www.asrock.com/mb/AMD/960GMU3S3%20FX/?cat=Download&os=BIOS an update is available for your BIOS (1.40). If you update to this following https://help.ubuntu.com/community/BiosUpdate , does it change anything?
If not, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Tags added: bios-outdated-1.40 ** Changed in: linux (Ubuntu) Status: Triaged => 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/1073148 Title: High cpu overhead on using multiple cores Status in “linux” package in Ubuntu: Incomplete Bug description: I'm using Ubuntu 13.04 dev and have noticed a high cpu overhead if a process is using multiple threads and computing them on different cores. To measure this I have written a little script in Python which I will attach. The script will create 2 threads which are using only a little time of a cpu core. On my AMD Phenom II X6 1045T the Linux kernel will assign the 2 threads on 2 cores which will use a total cpu time of 40% from a maximum of 600%. But if I'm using "taskset -ap 0x00000001 pid_of_script" the 2 threads will be assigned to 1 core and the total cpu usage will be only 25% from 600%. I'm wondering why there is a cpu overhead of 60% if the Linux kernel is using 2 cores instead of 1 core. --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.25. AplayDevices: **** List of PLAYBACK Hardware Devices **** card 0: SB [HDA ATI SB], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog] Subdevices: 0/1 Subdevice #0: subdevice #0 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: sworddragon 2374 F.... plugin-containe /dev/snd/pcmC0D0p: sworddragon 2374 F...m plugin-containe /dev/snd/timer: sworddragon 2374 f.... plugin-containe CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'SB'/'HDA ATI SB at 0xf9ff4000 irq 16' Mixer name : 'Realtek ALC662 rev1' Components : 'HDA:10ec0662,18497662,00100101' Controls : 33 Simple ctrls : 18 CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: No such file or directory dmesg: write failed: Broken pipe DistroRelease: Ubuntu 13.04 EcryptfsInUse: Yes IwConfig: Error: [Errno 2] No such file or directory Lsusb: Error: [Errno 2] No such file or directory MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M. MarkForUpload: True NonfreeKernelModules: nvidia Package: linux (not installed) ProcEnviron: TERM=xterm PATH=(custom, no user) LANG=de_DE.UTF-8 SHELL=/bin/bash ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.5.0-17-generic root=UUID=f1ce7323-74dc-46f7-95f7-887cc54403e7 ro ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5 RfKill: Error: [Errno 2] No such file or directory Tags: raring Uname: Linux 3.5.0-17-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dialout lpadmin plugdev sambashare sudo dmi.bios.date: 05/21/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: P1.20 dmi.board.asset.tag: BC5FF4739C55 dmi.board.name: 960GM/U3S3 FX dmi.board.vendor: ASRock 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.:bvrP1.20:bd05/21/2012:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rn960GM/U3S3FX:rvr: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. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1073148/+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
