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  pro-
       cessor core remained in C0 (working state) or any CX (sleep state) pro-
       cessor 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)

Czas wygenerowania: 0.00017 sek.

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