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Zephyr provides workqueue, a mechanism used to offload non-urgent processing to a lower priority thread. Workqueues are typically found in ISR (interrupt service routine) and high-priority threads.
In this talk, we shall present: - what workqueues are, and what they are not, - their typical use case - how workqueues, scheduling and meta-IRQ threads relate, - some best practices to address some common challenges, like sysworkq bottleneck, passing data or handling cancellation - some lesser known workqueues, like the p4_wq
This is a practical hands-on talk. We’ll therefore run demo code and investigate what’s going on under the hood by looking at the Zephyr internal implementation! This will help us to get a solid understanding of workqueues, their usages and limitations, “directly from the source” (code).
Loïc loves sharing knowledge and is an enthusiastic instructor at Doulos since 2018. Loïc enjoys teaching Embedded Linux, Yocto, Python, Edge AI… and Zephyr Essentials, the new training he designed.
