Launchpad has imported 5 comments from the remote bug at https://bugzilla.kernel.org/show_bug.cgi?id=51681.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2012-12-13T08:43:09+00:00 sworddragon2 wrote: My AMD Phenom II X6 1045T has a normal maximum frequenzy of 2.7 GHz but can boost up to 3 cores to 3.2 GHz if needed. My BIOS is showing correctly 3.2 GHz as the maximum frequenzy. Here are some informations about my system: sworddragon@ubuntu:~$ uname -m x86_64 sworddragon@ubuntu:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies 2700000 2000000 1400000 800000 I have written a script which uses 100% of cpu time for 1 core. Theoretically this should force the processor to go up to 3.2 GHz on this core. In the attachments is a log which shows the output from /proc/cpuinfo and top which shows that my processor is still using just 2.7 GHz. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071434/comments/29 ------------------------------------------------------------------------ On 2012-12-13T08:43:52+00:00 sworddragon2 wrote: Created attachment 89081 Log of /proc/cpuinfo and top Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071434/comments/30 ------------------------------------------------------------------------ On 2013-01-04T18:53:16+00:00 muziofg wrote: I have two different AMD CPUs with turbo core feature enabled: a Phenom II X6 1055T and a dualcore C-70 both have the same behaviour: if I read the frequency value from /sys/devices/system/cpu/*/cpufreq/* or /proc/cpuinfo I see the cores to never reach the "turbo" frequency. But the software cpufreq-aperf (found in the cpufrequtils package on a Debian system) can show me these peaks, expecially if I force 5 cores to powersave and 1 on performance governor for use cpuafreq-aper must be load the msr kernel module, I think the Turbo frequency is an internal feature of a CPU, difficult to control and monitor Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071434/comments/33 ------------------------------------------------------------------------ On 2013-11-20T15:04:42+00:00 sworddragon2 wrote: Thanks for the hint of cpufreq-aperf. 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 doesn't support showing the correct frequency. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071434/comments/54 ------------------------------------------------------------------------ On 2020-05-15T12:27:01+00:00 david wrote: It's working on 4.19.0-9-amd64 Debian 10 kernel directly from /proc/cpuinfo: # cat /proc/cpuinfo |grep -i model model : 10 model name : AMD Phenom(tm) II X6 1090T Processor # cat /proc/cpuinfo |grep MHz cpu MHz : 3528.820 cpu MHz : 831.966 cpu MHz : 893.121 cpu MHz : 800.173 cpu MHz : 1354.755 cpu MHz : 979.302 # cat /proc/cpuinfo |grep MHz cpu MHz : 3505.403 cpu MHz : 834.381 cpu MHz : 1281.693 cpu MHz : 1555.635 cpu MHz : 1476.154 cpu MHz : 955.208 3600 MHz turbo core. I think this bug can be closed as resolved. Reply at: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1071434/comments/55 ** Changed in: linux Status: Unknown => Confirmed ** Changed in: linux Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1071434 Title: /proc/cpuinfo doesn't support showing the correct Turbo Core frequency To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1071434/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
