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)