dvfs

Type Members

1. class CpuDvfsModule extends PowerModule

   

2. class CpuFormula extends simple.CpuFormula

   

   CPU formula component giving CPU energy of a given process in computing the ratio between global CPU energy and process CPU usage during a given period.

   CPU formula component giving CPU energy of a given process in computing the ratio between global CPU energy and process CPU usage during a given period.

   Global CPU energy is given thanks to the well-known global formula: P = c * f * V² [1]. This formula operates for an unique frequency/variable but many frequencies can be used by CPU during a time period (e.g using DVFS [2]). Thus, this implementation weights each frequency by the time spent by CPU in working under it.

   See also

   [2] http://en.wikipedia.org/wiki/Voltage_and_frequency_scaling.

   [1] "Frequency–Voltage Cooperative CPU Power Control: A Design Rule and Its Application by Feedback Prediction" by Toyama & al.

3. trait CpuFormulaConfiguration extends simple.CpuFormulaConfiguration

   

   Main configuration.

4. class CpuSensor extends simple.CpuSensor

   

   CPU sensor component that collects data from a /proc and /sys directories which are typically presents under a Linux platform.

   CPU sensor component that collects data from a /proc and /sys directories which are typically presents under a Linux platform.

   See also

   http://www.kernel.org/doc/man-pages/online/pages/man5/proc.5.html