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
behaviour 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
reinitialization. This has the effect of needing to send an HUP
signal if inserting a new battery, otherwise battery measurement
won’t be correct.
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