Re: [gentoo-user] Varying clocks freqs of CPU ?
On Wed, Nov 24, 2010 at 7:00 PM, meino.cra...@gmx.de wrote: Hi, 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.
Re: [gentoo-user] Varying clocks freqs of CPU ?
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.
Re: [gentoo-user] Varying clocks freqs of CPU ?
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
[gentoo-user] Varying clocks freqs of CPU ?
Hi, 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! Best regards, mcc
