08-11-2011
Quote:
Originally Posted by
Scrutinizer
Hi vishwamitra, well there is your answer. Your kernel command line says acpi=off, so then you cannot use acpi-cpufreq as long as you use acpi=off .
What should I do in that case ?
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LEARN ABOUT DEBIAN
cpufreq-aperf
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)