Preempt-RT Raspberry Pi Linux
summary
Preempt-RT is merged into a Raspberry Pi kernel branch (rpi-4.14.y-rt) and tested on a Pi 3 Model B using cyclictest. Measured worst-case latencies fall from about 3.6 ms on stock kernels to ~2.6 ms with PREEMPT and to ~150 μs with the RT patchset when a CPU core is isolated and IRQs are pinned. Work surfaces: shared-interrupt drivers, occasional USB lockups and merge friction with upstream commits; cross-build and distro config tweaks are needed but the RT build runs and lowers latency.
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chapters (23)
- 0:00Introduction
- 2:00Disclaimer
- 2:12Agenda
- 2:49Motivation
- 7:07Raspberry Pi
- 8:23Hardware
- 9:30Realtime
- 10:53Links
- 11:48Traditional links
- 13:09Raspberry Pi links
- 13:48Native links
- 14:44Source code
- 18:46Issues
- 21:13Compelling
- 21:55Evaluation
- 23:25Latency
- 23:55Pure
- 24:41Romaji
- 25:17Imaginewell
- 26:44Balance
- 27:32Realtime modulation
- 30:56Evaluation tests
- 33:47Physical CPU
