[time-nuts] CPU frequency and NTP crazyness.

Eric Fort eric.fort at gmail.com
Fri Jan 4 14:03:26 EST 2008

Two things come to mind here,  first most bios have a group of power
management features which are configurable, make sure those features are set
properly (disabled).  second, Your OS should have power management options
as well.  The features in windows seem a bit limited for directly addressing
cpu speed but under Linux the processor speed is directly settable.  The top
6 hits here<http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%253Aen-US%253Aofficial&hs=8tW&q=disable+cpu+frequency+scaling&btnG=Search>all
discuss this and give rather direct solutions.


On 1/4/08, Ryan <ryanbytes at gmail.com> wrote:
> I moved my NTP server to my old Athlon XP desktop running Windows XP
> and quickly noticed the effect the CPU power save feature had on NTP.
> Once the CPU started ramping down from 2GHz to wherever it lands when
> it's done the NTP offsets would hit over a second. I installed
> Seti at Home and Einstein at Home to keep the processor frequency at the
> maximum speed and everything has been just peachy with NTP. My
> question is this, does anyone have a way to switch off the power save
> feature the CPU is using so I don't have to run my machine full tilt?
> Thanks all!
> Ryan
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