October 31 - November 1 - Co-Located Events
October 28-30 - Conference
Lyon Convention Centre - Lyon, France
More information for Open Source Summit + Embedded Linux Conference Europe 2019
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Tuesday, October 29 • 12:20 - 12:55
Energy-efficiency and Linux - Rafael Wysocki, Intel

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Energy-efficiency is about optimizing the usage of energy with the goal to reduce it to the acceptable minimum.

Some Linux kernel features have been introduced with energy-efficiency in mind. It is the main goal of CPU idle time management, CPU performance scaling, PM-runtime and system-wide PM. Unfortunately, these features are often avoided out of concerns that they may prevent systems from achieving optimum performance or they are underutilized.

Needless to say, it does matter whether or not the kernel's energy-efficiency features are in use, however. The battery life of portable systems is affected by that directly, data center power budgets are not unlimited and, generally speaking, avoidable costs should not be paid, especially if they are environmental as well as financial. In this particular case it should be possible to avoid paying them, by enabling the features in question and controlling them with the help of interfaces provided for that, which I am going to explain.

avatar for Rafael Wysocki

Rafael Wysocki

Software Engineer, Intel
Rafael maintains the Linux kernel’s power management infrastructure and the core ACPI support code. He works at Intel and focuses on the mainline Linux kernel development. Rafael has been actively contributing to Linux since 2005, in particular to the kernel’s suspend/hibernate... Read More →

Tuesday October 29, 2019 12:20 - 12:55 CET
Lumiere Auditortium
  Linux Systems
  • Session Slides Included Yes