nanog mailing list archives
Re: DPDK and energy efficiency
From: Nick Hilliard <nick () foobar org>
Date: Tue, 23 Feb 2021 16:47:53 +0000
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
Current thread:
- DPDK and energy efficiency Etienne-Victor Depasquale (Feb 21)
- Re: DPDK and energy efficiency Douglas Fischer (Feb 22)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 22)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 22)
- Re: DPDK and energy efficiency Pawel Malachowski (Feb 23)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 23)
- Re: DPDK and energy efficiency Nick Hilliard (Feb 23)
- Re: DPDK and energy efficiency Shane Ronan (Feb 23)
- Re: DPDK and energy efficiency Nick Hilliard (Feb 23)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 23)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 22)
- Re: DPDK and energy efficiency Douglas Fischer (Feb 22)
- Re: DPDK and energy efficiency Pawel Malachowski (Feb 23)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 23)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 22)
- Re: DPDK and energy efficiency Pawel Malachowski (Feb 22)
- Re: DPDK and energy efficiency Etienne-Victor Depasquale (Feb 22)