Etienne-Victor Depasquale wrote on 23/02/2021 16:03:
"we found that a poll mode driver (PMD) thread accounted for approximately 99.7 percent CPU occupancy (a full core utilization)."
interrupt-driven network drivers generally can't compete with polled mode drivers at higher throughputs on generic CPU / PCI card systems. On this style of config, you optimise your driver parameters based on what works best under the specific conditions.
Polled mode drivers have been around for a while, e.g.
https://svnweb.freebsd.org/base?view=revision&revision=87902
Nick
