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ee99ee2
Guru
Joined: 18 Jun 2002
Posts: 307
Location: Murfreesboro, TN, USA
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 Posted: Tue Apr 26, 2005 9:13 am Post subject: Pentium M (Centrino) and Dynamic CPU Speed Scaling |
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Pentium M CPUs, at least under Windows, scale up and down with the amount of load they are under to save power. In other words, when idle, they'll scale way down to something like 200MHz (or less?), but bounce back up to 1.8GHz (or whatever) when the demand is high. Is this handled by the hardware, or the OS? I need to make sure this will work in Linux, and if it's handled by the OS I suppose I need to find how to how get the kernel to do what Windows does...
So, is the CPU frequency scaling something the kernel does or the hardware? If kernel, how?
-ee99ee
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ToeiRei
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Joined: 03 Jan 2005
Posts: 1191
Location: Austria
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| Posted: Tue Apr 26, 2005 10:10 am Post subject: |
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you might want to have a look at speedfreqd and simmilar. There is a good hint in the gentoo-wiki.com Acer 803 install-Howto
Rei
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rmh3093
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Joined: 06 Aug 2003
Posts: 2138
Location: Albany, NY
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| Posted: Tue Apr 26, 2005 12:11 pm Post subject: |
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or try the the ondemand governor and the cpufreq userland scrips make changing things easy
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Kernel & Hardware
