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JackDoan
7fe4fab167
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>
10 lines
263 B
Go
10 lines
263 B
Go
//go:build !linux || android || e2e_testing
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package util
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// NICIRQCPUs reports no IRQ information on platforms without the linux
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// sysfs interface; callers fall back to their non-IRQ-aware defaults.
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func NICIRQCPUs() (map[int]bool, error) {
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return nil, nil
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}
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