intelligently monitor and manipulate CPU frequency
cpufreqd [-Dmhv] [-f filename] [-V verbosity]
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.
- -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
- -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
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
- /usr/sbin/cpufreqd -D
- 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.
kernel cpu frequency interface
old deprecated kernel cpu frequency interface (please avoid it)
kernel power management interface (ACPI)
kernel power management interface (APM)
kernel power management interface (PMU). (Not yet implemented in cpufreqd-2.0)
Multiple CPUs are not considered separately thus the same policy is set in every
Battery can only be specified in percent, not in minutes remaining.