On 02/01/2025 11:23, Haifeng Xu wrote: > We want to make full use of cpu resources to receive packets. So > we enable 63 rx queues. But we found the rate of interrupt growth > on cpu 0~15 is faster than other cpus(almost twice). ... > I am confused that why ixgbe NIC can dispatch the packets > to the rx queues that not specified in RSS configuration.
Hypothesis: it isn't doing so, RX is only happening on cpus (and queues) 0-15, but the other CPUs are still sending traffic and thus getting TX completion interrupts from their TX queues. `ethtool -S` output has per-queue traffic stats which should confirm this. (But Eric is right that if you _want_ RX to use every CPU you should just change the indirection table.)
