Energy measurement tools.
Managing energy at any system level while providing a minimum accuracy requires measuring the energy available and consumed one.There are various tools used to measure energy.Below is a selection of energy measurement tools:
PowerTop
PowerTop is a Linux tool to diagnose issues with power consumption and power management. It reports an estimation of the energy consumption of software applications and system components. And also offers an interactive mode where users can apply different power management settings not enabled by default in the Linux distribution. PowerTop therefore share similarities with pTop but also limitations such as the lack of fine-grained results.
Energy Checker
Energy Checker is an SDK made by Intel and provides function for exporting and importing counters from an application. These counters measure the time spent for a particular event or process, such as reading a file, or converting a video. The counters are then used to estimate the power consumption of the application. However, the power estimation requires a hardware powermeter, thus limiting the flexibility of the approach.
Joulemeter
Joulemeter is a software tool that estimated the energy consumption of hardware resources and software applications in a computer. It monitors resources usage, such as the CPU utilization or screen brightness, in order to estimate the energy consumption of these resources. Joulemeter uses machine specific power models for hardware configuration. Their current model takes into account processor Pstates, power utilization, disk I/O levels and whether the monitor is turned on or off. The models, however, are learned through calibration. This draws a limitation in term of flexibility as power models cannot be estimated without previous laboratory benchmarks.
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