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