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                                CPUFREQD(8)