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Interrupt distribution on intel X710 NIC

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I have a VPN server with Intel X710 and Xeon E5-2630 v4. Debian 10. Based on accel-ppp, pptp protocol. Single SFP interface, two vlans. Problem - interrupts are not evenly distributed across queues. In the first queue, more than 10 times more interrupts come than the rest. Because of this, after running set_irq_affinity -x all ens15f0, my entire load falls on the first core.

  • I have tried updating the i40e drivers.
  • Tried using another script instead of set_irq_affinity - , with it the same result, just not the 1st core, but 2 and 20.
  • I tried to turn off offload: ethtool --offload ens15f0 rx off tx off sg off tso off gso off gro off lro off rxvlan off txvlan off rxhash off
  • Tried: ethtool -C ens15f0 adaptive-rx on adaptive-tx on

I reread half of the Internet, but the overall picture has not yet emerged. If anyone has a lot of experience with this, please point in the right direction. enter image description here

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