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  1. Bug #1071434
  2. Comment #53

Comment 53 for bug 1071434

Revision history for this message
In , muziofg (muziofg-linux-kernel-bugs) 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