Note what the thermal camera's SDK costs in CPU on tower 111

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Peter Bochmann 2026-10-14 21:13:55 +02:00
parent 474e3cac8a
commit 28ff027950
Signed by: peter.bochmann
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@ -171,6 +171,11 @@ scripts for this are worth keeping; note that wrapping them in `timeout` SIGTERM
2026-10-14 (docs/tower-installation.md, Phase 2b). Not yet tested: a pulled camera cable during a scan
(the reconnect is only unit-tested), and a long unattended run. A NIR unit would be a third driver
behind the same key.
- The InfraTec SDK costs about a quarter of one core on the 3 Delta even between pictures: three threads
it starts in `dll_init` and one per connection poll the raw socket in `nanosleep` loops (measured on
tower 111, 2026-10-14). The frame rate does not change it. In the first minutes after deploying, the
CPU guard slowed the scan once (86 °C, back to normal after 2 min). Watch Health `cpu_c` over a warm
day before a tower without air flow gets a thermal camera.
- Tower 111's colour profile does not apply: every start since 2026-10-07 logs `applying profile 'standard'
from .../rgb/standard.xml failed (error -39)`, and the camera runs on whatever it had. Unrelated to the
thermal camera; seen again while testing it.