pmu(4) [netbsd man page]

PMU(4)							   BSD Kernel Interfaces Manual 						    PMU(4)

NAME

     pmu -- support for Power Management Units found in all Apple laptops and some desktop Power Macintosh computers

SYNOPSIS

     pmu* at obio?
     nadb* at pmu?
     battery* at pmu?
     smartbat* at pmu?

DESCRIPTION

     The pmu driver provides support for the Power Management Unit found in Apple laptops and some desktop Power Macintosh computers.  Functions
     controlled by the PMU include the real time clock, ADB, power, batteries, on some laptops like the PowerBook 3400c and similar machines it
     also controls hotkeys and display brightness, on others it provides an iic(9) bus and on some it controls CPU speed.  On many older machines
     it also provides access to some non-volatile memory and thermal sensors.  Not all those features are present on all machines, for instance
     Power Macintosh G4 and later machines don't have ADB, many more recent laptops have display brightness and backlight control built into the
     graphics controller instead of the PMU, only a few older PowerBooks use the PMU for CPU speed control and newer machines use a different way
     to access non-volatile memory.  However, all known PMUs so far provide a real time clock and power control.

   Notes by model
     Real time clock and power control are present and supported on all machines that can run NetBSD/macppc, ADB is supported when present.

     PowerBook 2400, 3400c, and 3500
		   Battery status and thermal sensors found on the mainboard and in the battery pack are supported by the battery(4) driver, val-
		   ues can be read via envsys(4).  Hotkeys for brightness control are supported, CPU speed control and parameter RAM are present
		   but unsupported.

     Power Macintosh G4
		   ADB is not present, iic(9) is present but unsupported.

SEE ALSO

     battery(4), cuda(4), nadb(4), nvram(4), obio(4), iic(9)

BUGS

     Some features are currently unsupported, like the iic(9) bus, access to parameter RAM and CPU speed control.

BSD
								   May 14, 2007 							       BSD

CPUFREQD(8)															       CPUFREQD(8)

NAME

       cpufreqd - intelligently monitor and manipulate CPU frequency

SYNOPSIS

       cpufreqd [-Dmhv] [-f filename] [-V verbosity]

DESCRIPTION

       cpufreqd  is  used to monitor the status of the system and adjust the frequency of the CPU according to the user configuration.	The behav-
       iour of the daemon is fully configurable. Logs are reported through syslogd.

PARAMETERS

       -D, --no-daemon
	      stay in foreground (used to debug).

       -m, --manual
	      start in manual mode.

       -f filename, --file=filename
	      Specify the configuration file to read.  The default is /etc/cpufreqd.conf.

       -h, --help
	      Display command line help.

       -v, --version
	      Display the version number of the daemon.

       -V, --verbosity
	      verbosity level from 0 (less verbose) to 7 (most verbose). Default verbosity is 4

SIGNALS

       SIGHUP This lets cpufreqd perform a re-initialization.  The configuration file (default is /etc/cpufreqd.conf) will  be re-read and  probes
	      re-done. (Not yet implemented in cpufreqd-2.0)

       SIGINT, SIGTERM
	      cpufreqd will terminate.

EXAMPLES

       /usr/sbin/cpufreqd -D

NOTES

       Some ACPI implementations are very cpu-consuming when reading the info file of
	      system  batteries.  Cpufreqd  implements a simple workaround that avoids reading that file except on initialization or reinitializa-
	      tion. This has the effect of needing to send an HUP signal if inserting a new battery, otherwise battery measurement won't  be  cor-
	      rect.

FILES

       /sys/devices/system/cpu/cpu*/cpufreq
	      kernel cpu frequency interface

       /proc/cpufreq
	      old deprecated kernel cpu frequency interface (please avoid it)

       /proc/acpi
	      kernel power management interface (ACPI)

       /proc/apm
	      kernel power management interface (APM)

       /proc/pmu
	      kernel power management interface (PMU). (Not yet implemented in cpufreqd-2.0)

       /etc/cpufreqd.conf
	      cpufreqd configuration file

SEE ALSO

       cpufreqd.conf(5),syslogd(8),cpufreqd-set(1),cpufreqd-get(1)

BUGS

       Multiple  CPUs are not considered separately thus the same policy is set in every available CPU.  Battery can only be specified in percent,
       not in minutes remaining.

AUTHOR

       George Staikos <staikos@0wned.org>

       Mattia Dongili <malattia@linux.it>

       Rene Rebe <rene@rocklinux.org>

								    05 May 2005 						       CPUFREQD(8)