A post in the upstream report has given the hint for the application cpufreq-aperf for measuring the cpu frequency. Here are the results:
root@ubuntu:~# taskset -c 0 sh -c "./test.py & sleep 1 && cpufreq-aperf --once && echo ---------- && cat /proc/cpuinfo | grep MHz && pkill ^test.py$" CPU Average freq(KHz) Time in C0 Time in Cx C0 percentage 000 3186000 01 sec 005 ms 6832127434 sec 705 ms 100 001 0783000 00 sec 026 ms 00 sec 976 ms 02 002 0783000 00 sec 032 ms 00 sec 970 ms 03 003 0783000 00 sec 001 ms 01 sec 001 ms 00 004 0783000 00 sec 016 ms 00 sec 986 ms 01 005 0783000 00 sec 039 ms 00 sec 963 ms 03 ---------- cpu MHz : 2700.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 cpu MHz : 800.000 Turbo Core is working but /proc/cpuinfo is simply not showing it. So it is just an output issue of procfs. ** Summary changed: - Turbo Core doesn't work on an AMD Phenom II X6 1045T + /proc/cpuinfo doesn't support showing the correct Turbo Core frequency -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1071434 Title: /proc/cpuinfo doesn't support showing the correct Turbo Core frequency Status in The Linux Kernel: Unknown Status in “linux” package in Ubuntu: Confirmed Bug description: I'm using Ubuntu 12.10 (64 bit) and my AMD Phenom II X6 1045T doesn't boost from 2.7 GHz to 3.2 GHz if a core is using 100% of cpu time. sworddragon@ubuntu:~$ uname -a Linux ubuntu 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux sworddragon@ubuntu:~$ dmesg | grep powernow [ 1.204050] powernow-k8: Found 1 AMD Phenom(tm) II X6 1045T Processor (6 cpu cores) (version 2.20.00) [ 1.204074] powernow-k8: Core Performance Boosting: on. [ 1.204110] powernow-k8: 0 : pstate 0 (2700 MHz) [ 1.204113] powernow-k8: 1 : pstate 1 (2000 MHz) [ 1.204115] powernow-k8: 2 : pstate 2 (1400 MHz) [ 1.204117] powernow-k8: 3 : pstate 3 (800 MHz) sworddragon@ubuntu:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 2700000 2000000 1400000 800000 My BIOS is showing correctly 3.2 GHz as the maximum frequenzy and if I disable Cool' n' Quiet my frequenzy will be constantly 2705.104 MHz for all cores in /proc/cpuinfo without boosting to 3.2 GHz if a core is using 100% of cpu time. --- 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 6544 F.... plugin-containe /dev/snd/pcmC0D0p: sworddragon 6544 F...m plugin-containe /dev/snd/timer: sworddragon 6544 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/linux/+bug/1071434/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
