cpufreq-aperf(1) [debian man page]

cpufreq-aperf(1)														  cpufreq-aperf(1)

NAME

       cpufreq-aperf - Calculates the average frequency over a time period

SYNTAX

       cpufreq-aperf [options]

DESCRIPTION

       On latest processors exist two MSR registers refered to as:
	 - MPERF increasing with maxium (P0) frequency in C0
	 - APERF increasing with current/actual frequency in C0

       From this information the average frequency over a time period can be calculated and this is what this tool does.

       A  nice	falloff  feature  beside the average frequency is the time a processor core remained in C0 (working state) or any CX (sleep state)
       processor sleep state during the measured time period. This information can be determined from the fact that MPERF  only  increases  in	C0
       state.

OPTIONS

       -c --cpu <CPU>
	       The <CPU> core to measure - default all cores.

       -i --interval <seconds>
	      Refresh rate - default 1 second.

       -o --once
	      Exit after one interval.

       -h --help
	      Prints the available options.

REMARKS

       The msr driver must be loaded for this command to work.

AUTHORS

       Thomas Renninger <trenn@suse.de>

SEE ALSO

       cpufreq-set(1), cpufreq-info(1)

Mattia Dongili								0.1							  cpufreq-aperf(1)

cpufreq-set(1)															    cpufreq-set(1)

NAME

       cpufreq-set - A small tool which allows to modify cpufreq settings.

SYNTAX

       cpufreq-set [options]

DESCRIPTION

       cpufreq-set  allows you to modify cpufreq settings without having to type e.g. "/sys/devices/system/cpu/cpu0/cpufreq/scaling_set_speed" all
       the time.

OPTIONS

       -c --cpu <CPU>
	      number of CPU where cpufreq settings shall be modified.

       -d --min <FREQ>
	      new minimum CPU frequency the governor may select.

       -u --max <FREQ>
	      new maximum CPU frequency the governor may select.

       -g --governor <GOV>
	      new cpufreq governor.

       -f --freq <FREQ>
	      specific frequency to be set. Requires userspace governor to be available and loaded.

       -r --related
	      modify all hardware-related CPUs at the same time

       -h --help
	      Prints out the help screen.

REMARKS

       Omitting the -c or --cpu argument is equivalent to setting it to zero.

       The -f FREQ, --freq FREQ parameter cannot be combined with any other parameter except the -c CPU, --cpu CPU parameter.

       FREQuencies can be passed in Hz, kHz (default), MHz, GHz, or THz by postfixing the value with the wanted unit name, without any space (fre-
       quency in kHz =^ Hz * 0.001 =^ MHz * 1000 =^ GHz * 1000000).

       On Linux kernels up to 2.6.29, the -r or --related parameter is ignored.

FILES

       /sys/devices/system/cpu/cpu*/cpufreq/
       /proc/cpufreq (deprecated)
       /proc/sys/cpu/ (deprecated)

AUTHORS

       Dominik Brodowski <linux@brodo.de> - author
       Mattia Dongili<malattia@gmail.com> - first autolibtoolization

SEE ALSO

       cpufreq-info(1), cpufreq-aperf(1)

Mattia Dongili								0.1							    cpufreq-set(1)