DPDK and energy efficiency

Tue Feb 23 16:47:53 UTC 2021

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