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The Embedded Linux Conference (ELC) is the premier vendor-neutral technical conference for companies and developers using Linux in embedded products. This conference, now in its 9th year, has the largest collection of sessions dedicated exclusively to embedded Linux and embedded Linux developers. ELC is embedded Linux experts talking about solutions to your embedded Linux problems. ELC consists of 3 days of presentations, tutorials and Bird-of-a-Feather sessions. There are over 50 sessions to choose from, on a wide variety of topics.

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Friday, February 22 • 9:00am - 9:50am
In Kernel Switcher: A Solution to Support ARM's New big.LITTLE Implementation - Mathieu Poirier, Linaro

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The 'In Kernel Switcher' (IKS) is a solution developed by Linaro and ARM to support ARM’s new big.LITTLE implementation. It is pairing together an A7 (LITTLE) and an A15 (big) processor into a logical entity that is then presented to the kernel as one CPU. From there the solution is seeking to achieve optimal performance and power consumption by switching
between the big or the LITTLE core based on system usage.

This session will present the IKS solution. After giving an overview of the big.LITTLE processor we will present the solution itself, how frequencies are masqueraded to the cpufreq core, the steps involved in doing a “switch” between cores and some of the optimisation made to the interactive governor.

The session will conclude by presenting the results that we obtained as well as a brief overview of Linaro's upstreaming plan.


Speakers
avatar for Mathieu Poirier

Mathieu Poirier

Linaro - Arm Ltd., Linaro
Mathieu Poirier has been part of the Linaro organisation since its inception in 2010. From there he has helped members with upstreaming, worked on the android open source project, addressed issues in the kernel's deadline scheduler and worked on the CoreSight subsystem that he currently... Read More →


Friday February 22, 2013 9:00am - 9:50am PST
Cyril Magnin II Parc 55 Wyndham Hotel 55 Cyril Magnin Street, San Francisco, CA 94102

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