longrun (4)

Leading comments

Copyright (c) 2001 Tamotsu HATTORI <athlete@kta.att.ne.jp>
Copyright (c) 2001 Mitsuru IWASAKI <iwasaki@FreeBSD.org>
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
   notice, this list of conditions and the following disclaimer.
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   notice, this ...

(The comments found at the beginning of the groff file "man4/longrun.4freebsd".)

NAME

longrun - Transmeta(TM) Crusoe(TM) LongRun(TM) support

SYNOPSIS

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 Ta Vt integer Ta yes Ta LongRun mode:

Ta Ta Ta 0: minimum frequency mode

Ta Ta Ta 1: power-saving mode

Ta Ta Ta 2: performance mode

Ta Ta Ta 3: maximum frequency mode

hw.crusoe.frequency Ta Vt integer Ta no Ta Current frequency (MHz).

hw.crusoe.voltage Ta Vt integer Ta no Ta Current voltage (mV).

hw.crusoe.percentage Ta Vt integer Ta no Ta Processing performance (%).

EXAMPLES

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"

HISTORY

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

AUTHORS

An -nosplit LongRun support and this manual page were written by An Tamotsu HATTORI Aq athlete@kta.att.ne.jp and An Mitsuru IWASAKI Aq iwasaki@FreeBSD.org .