JackDoan 7fe4fab167 tun: default pin CPUs avoid NIC IRQ cores ...

When tun.pin_threads is on and tun.cpu_affinity is unset, pick pin CPUs
from the allowed set that do not service any up physical NIC's MSI vectors
(read-only walk of /sys/class/net/*/device/msi_irqs and
/proc/irq/*/effective_affinity_list). The old allowed[i] default pinned
encrypt threads onto exactly the cores drivers affine their first RX queue
IRQs to; a flow whose RSS queue fired there had NAPI fighting encrypt for
the core (measured 8.4 vs 10.2 Gbps REV bimodality). Falls back to the old
spread, with a log, when there aren't enough IRQ-free CPUs - e.g. drivers
that allocate one queue per core until the admin narrows them (ethtool -L).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-14 15:20:04 -05:00

..

go_service

Switch to slog, remove logrus (#1672)

2026-04-27 09:41:47 -05:00

service_scripts

Create service script for open-rc (#711)

2024-04-30 09:53:00 -04:00

config.yml

tun: default pin CPUs avoid NIC IRQ cores

2026-07-14 15:20:04 -05:00