On Thu, Nov 25, 2010 at 21:51, Stroller <strol...@stellar.eclipse.co.uk> wrote: > > On 25/11/2010, at 1:24pm, App Deb wrote: >> On Wed, Nov 24, 2010 at 7:00 PM, <meino.cra...@gmx.de> wrote: >>> >>> new features, new problems... >>> Recent multi-core CPUs modify the clock freqs of their core >>> if only a subset of all cores are used. >>> >>> Are their any CONFIGs need to be set in the linux kernel to >>> guarantee a stable system running those kind of CPUs ? >>> >>> Thank you very much in advance for any help! >> >> Most Intel CPUs need: CONFIG_X86_ACPI_CPUFREQ >> >> All AMD CPUs need: CONFIG_X86_POWERNOW_K8 >> >> enabled in the kernel. >> >> And after that you need to install and enable/run the cpufrequtils daemon. > > How does one determine whether one's CPU supports this, please? > > Stroller. > > >
Doc for this is located at /usr/src/linux/Documentation/cpu-freq/ Speaking of my case, I first get to know my cpu looking at /proc/cpuinfo and then grep the doc directory. # grep Sempron /usr/src/linux/Documentation/cpu-freq/* /usr/src/linux/Documentation/cpu-freq/amd-powernow.txt:8th Generation: powernow-k8: Athlon, Athlon 64, which tells me to select powernow-k8. powetnow-k7, for instance, wont work. But for Intel I *guess* acpi-intel is the one. -- Fatih
