perf: pin dashcamd to cores 0-3 (little cluster)

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Previously ran unpinned (affinity mask 0xff) across all 8 cores. When it
landed on core 4 (controlsd) or 5 (plannerd/radard) or 7 (modeld), its
70MB/s frame copies and MP4 muxing caused cache/memory-bandwidth
contention with the RT-pinned processes. SCHED_FIFO prevented direct
preemption but not the cache thrash.

OMX offloads actual H.264 work to hardware so the main thread is
lightweight — fine on the little cluster.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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This commit is contained in:

Brian Hanson

2026-04-16 22:35:02 -05:00

parent 2ddb7fc764

commit 6dede984dc

2 changed files with 16 additions and 0 deletions

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