3 ms·

If you have many interrupts due to network packet load, you're doing something wrong. Interrupt-based handling is slower and less efficient (than polling) after

by namibj 6y ago

If you have many interrupts due to network packet load, you're doing something wrong. Interrupt-based handling is slower and less efficient (than polling) after some throughput that's iirc about a few hundred Mbit/s/core.

robocat 6y ago
I think you are confusing Linux’s epoll with the hardware network interface. Some hardware offloads a lot of processing to dedicated network card processors, other network hardware might just use hardware interrupts for the driver module. Either way, I am sure there are plenty of devices that can cause a lot of interrupts (USB?), not just network IO. Presumably there is a way to monitor the count of interrupts per second in Linux?
- caf 6y ago
  You can sample /proc/interrupts to see.
- namibj 6y ago
  No, I didn't confuse those. I am aware that hardware offloading is still quite luxurious, but even then it's bad to spam interrupts.