On Thu, 2 Jan 2025 16:01:18 +0000 Edward Cree wrote: > 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.)
IIRC Niantic had 4 bit entries in the RSS table or some such. It wasn't possible to RSS across more than 16 queues at a time. It's a great NIC but a bit dated at this point.
