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LONGRUN(4) Device Drivers Manual (i386) LONGRUN(4)


longrunTransmeta(TM) Crusoe(TM) LongRun(TM) support


LongRun support is a collection of power saving modes for the Transmeta Crusoe chips, similar in scope to Intel's SpeedStep. The following sysctl(8) MIBs control the different CPU modes:
Name Type Changeable Description
hw.crusoe.longrun integer yes LongRun mode:
0: minimum frequency mode
1: power-saving mode
2: performance mode
3: maximum frequency mode
hw.crusoe.frequency integer no Current frequency (MHz).
hw.crusoe.voltage integer no Current voltage (mV).
hw.crusoe.percentage integer no Processing performance (%).


Print the current status:
% sysctl hw.crusoe
To set LongRun mode to performance oriented variable frequency mode (less power savings):
# sysctl hw.crusoe.longrun=2


The Transmeta(TM) Crusoe(TM) LongRun(TM) support first appeared in FreeBSD 4.4.


LongRun support and this manual page were written by Tamotsu HATTORI ⟨⟩ and Mitsuru IWASAKI ⟨⟩.
June 30, 2001 Debian