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 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
