The Benefits of Low Operating Voltage Devices to the Energy Efficiency of Parallel Systems

TL;DR

This paper discusses how low operating voltage devices can enhance the energy efficiency of parallel systems, emphasizing the importance of software optimization to fully realize these benefits.

Contribution

It highlights the critical role of software in leveraging low voltage devices for energy-efficient parallel systems, an aspect often overlooked in hardware-focused research.

Findings

Low voltage operation can significantly reduce energy consumption.

Software optimization is essential to maximize energy savings.

Energy efficiency gains depend on both hardware and software improvements.

Abstract

Programmable circuits such as general-purpose processors or FPGAs have their end-user energy efficiency strongly dependent on the program that they execute. Ultimately, it is the programmer's ability to code and, in the case of general purpose processors, the compiler's ability to translate source code into a sequence of native instructions that make the circuit deliver the expected performance to the end user. This way, the benefits of energy-efficient circuits build upon energy-efficient devices could be obfuscated by poorly written software. Clearly, having well-written software running on conventional circuits is no better in terms of energy efficiency than having poorly written software running on energy-efficient circuits. Therefore, to get the most out of the energy-saving capabilities of programmable circuits that support low voltage operating modes, it is necessary to address software issues that might work against the benefits of operating in such modes.