LCU14-109: Embedded Systems: How Low Can You Go?

LCU14-109: Embedded Systems: How Low Can You Go?

Speaker: Arnd Bergmann Track: Kernel Location: Grand Peninsula A, Hyatt Regency San Francisco Airport, Burlingame, CA, United States

★ Session Summary ★ Arm Linux has traditionally been the the operating system of choice for the very low end of embedded systems, with very low power consumption and tight constraints on memory size and CPU speed.

We still support machines based on Arm7TDMI and Cortex-M3 with as little as 2MB of RAM, but there is a disconnect between the stagnating upstream contributions for systems like this and growing interest for using Linux in ultra-low power and low-cost scenarios like wearable computing or the ““Internet of Things””.

In my presentation, I will talk about some of the tricks that used to scale Linux to the absolute low-end, such as running without an MMU or executing the kernel from NOR flash, and areas that could use more work, such as upstream ports for Linaro member platforms (STM32, Kinetis, …) and improving kernel support for low-memory scenarios.

In the discussion, I want to find out where people in the audience think we should be heading in Arm Linux. Are we leaving the low-end market to MIPS, ARC, Blackfin and MSP430 by removing support for MMU-less systems and small-memory configurations, or should we invest more time in these systems?’

★ Resources ★ Zerista: Google Event:  Presentation:  Video:  Eatherpad:

★ Event Details ★ Linaro Connect USA - #LCU14 September 15-19th, 2014 Hyatt Regency San Francisco Airport >

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