Improving Energy Efficiency on Asymmetric Multiprocessing Systems

Explore energy efficiency strategies for asymmetric multiprocessing systems in this conference talk from the Linux Plumbers Conference. Delve into ARM's big.LITTLE architecture, featuring a multicore chip with both high-performance and high-efficiency processors running a single Linux OS instance. Learn how pre-existing Linux kernel tuning parameters can be leveraged to optimize workload distribution between processor types, resulting in significant energy efficiency gains. Examine the ARM big.LITTLE schematic, energy efficiency strategy, and the Morten Rasmussen approach. Compare two methods of conserving energy, including RCU callback offloading, and analyze their effectiveness through result summaries. Gain insights into improving battery life for multicore embedded devices and participate in a Q&A session to deepen your understanding of asymmetric multiprocessing systems.

Intro
Overview
ARM big.LITTLE Architecture
ARM big.LITTLE Schematic
ARM big.LITTLE Energy Efficiency Strategy
Review: Morten Rasmussen Approach
Two Ways Of Conserving Energy
Base Case
1: ARM big.LITTLE With RCU Callback Offloading
Results Summary
Summary: Which is Better?
Questions?