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March 12-14, 2018 - Portland, OR
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Wednesday, March 14 • 11:05am - 11:55am
Not Really, but Kind of Real Time Linux - Sandra Capri, Ambient Sensors

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The problem: can a Linux system be constrained to deterministically control a task within some real-time-ish constraints? Sandra was tasked to use a Linux SBC to generate a pulse by asserting and deasserting a GPIO, accurate to within a fraction of a millisecond. Is it possible to control a task/thread/unit of control consistently on a standard Linux system without resorting to the Real Time patches?


There are thousands of modifications/configuration changes that one can do to a standard embedded Linux kernel, but determining which ones to modify to to give some semblance of real time control can be confusing.


This talk will illustrate what kernel configurations worked, and how kernel space code compared to user space code. Additionally, there may be other ways to skin this real time cat.


Results will be reported from work done on a Raspberry Pi as well as a BeagleBone Black.

Speakers
avatar for Sandra Capri

Sandra Capri

CTO, Ambient Sensors
Sandra Capri is the Chief Technology Officer at Ambient Sensors in Boise Idaho. During her time at Ambient Sensors, she has worked on a diverse set of subsystems/embedded chipsets including Bluetooth Low Energy 4.2 and 5, Bluetooth Mesh, connecting embedded WiFi systems to Webservers... Read More →



Wednesday March 14, 2018 11:05am - 11:55am
Pavilion East