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Instructions for using RTDVS on kernel 2.2.x, 2.4.x and 2.5.x


Download RTDVS (Real Time Dynamic Voltage Scaling) for Linux from http://kabru.eecs.umich.edu/rtos/energyaware.html . It has been developed under RedHat 6.1 but should work with any 2.2 kernel.

RTDVS provides support for PowerNOW! technology on kernel 2.2.x.
If you are using a 2.2.x kernel you can just download rtdvs.tar.gz and compile it with make.

RTDVS can be used also on recent 2.5.x kernels. David Kimdom wrote a patch to make it work on kernel 2.5.50.
You can download it at: http://people.debian.org/~dwhedon/rtdvs.diff
The RTDVS sources+Kimdom patch are mirrored here: http://www.nervous.it/hw/rtdvs-nerv.tar.gz
Oliver Friedrich reported it to work also with kernel 2.4.20!!!

Warning: the cpufreq project is more mature than RTDVS. Moreover RTDVS development has been discontinued. You must have a really good reason to use RTDVS instead of cpufreq!


This is a step by step guide for compiling rtdvs on kernel >2.4.20

This is a step by step guide for compiling rtdvs on kernel 2.5.x:



This are the instructions for using the powernowK7 module on any kernel:


Watch for errors in your /var/log/messages and /var/log/syslog
If everything is ok then you should be able to view the status of your cpu:
cat /proc/powernow
and adjust the speed manually with:
echo XXX >/proc/powernow
where XXX is the speed you want your processor to run at. E.g. to set my AthlonXP 1400+ at 500Mhz I use:
echo 500 >/proc/powernow
The voltage is set accordingly to the frequency and I suggest not to touch it.






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