A System-Level Voltage/Frequency Scaling Characterization Framework for Multicore CPUs

by   George Papadimitriou, et al.

Supply voltage scaling is one of the most effective techniques to reduce the power consumption of microprocessors. However, technology limitations such as aging and process variability enforce microprocessor designers to apply pessimistic voltage guardbands to guarantee correct operation in the field for any foreseeable workload. This worst-case design practice makes energy efficiency hard to scale with technology evolution. Improving energy-efficiency requires the identification of the chip design margins through time-consuming and comprehensive characterization of its operational limits. Such a characterization of state-of-the-art multi-core CPUs fabricated in aggressive technologies is a multi-parameter process, which requires statistically significant information. In this paper, we present an automated framework to support system-level voltage and frequency scaling characterization of Applied Micro's state-of-the-art ARMv8-based multicore CPUs used in the X-Gene 2 micro-server family. The fully automated framework can provide fine-grained information of the system's state by monitoring any abnormal behavior that may occur during reduced supply voltage conditions. We also propose a new metric to quantify the behavior of a microprocessor when it operates beyond nominal conditions. Our experimental results demonstrate potential uses of the characterization framework to identify the limits of operation for improved energy efficiency.


page 1

page 6


On the Impact of Device-Level Techniques on Energy-Efficiency of Neural Network Accelerators

Energy-efficiency is a key concern for neural network applications. To a...

Predict; Do not React for Enabling Efficient Fine Grain DVFS in GPUs

With the continuous improvement of on-chip integrated voltage regulators...

Modelling DVFS and UFS for Region-Based Energy Aware Tuning of HPC Applications

Energy efficiency and energy conservation are one of the most crucial co...

Information Energy Ratio of XOR Logic Gate at Mesoscopic Scale

As the size of transistors approaches the mesoscopic scale, existing ene...

SysScale: Exploiting Multi-domain Dynamic Voltage and Frequency Scaling for Energy Efficient Mobile Processors

There are three domains in a modern thermally-constrained mobile system-...

Techniques for Efficiently Handling Power Surges in Fuel Cell Powered Data Centers: Modeling, Analysis, Results

Fuel cells are a promising power source for future data centers, offerin...

A Holistic Analysis of Datacenter Operations: Resource Usage, Energy, and Workload Characterization – Extended Technical Report

Improving datacenter operations is vital for the digital society. We pos...

Please sign up or login with your details

Forgot password? Click here to reset