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)