# systemd drop-in: /etc/systemd/system/caddy.service.d/affinity.conf
#
# Keep Caddy off cpu0. The PPS interrupt is handled there and cannot be moved
# (Pi 4 GPIO IRQs are demuxed via pinctrl-bcm2835 and refuse an smp_affinity),
# so any work scheduled on cpu0 adds jitter to the PPS timestamp directly.
# Caddy is mostly idle, but on this box cpu0 belongs to the clock. See
# TIMING-NOTES.md.
[Service]
CPUAffinity=1
Nice=10