Linux 5.7 Netfilter To See AVX2 Optimizations For Big Performance Boost - Can Be Up To ~420%
Written by Michael Larabel in Linux Networking on 16 March 2020 at 12:00 AM EDT. 15 Comments
LINUX NETWORKING --
Linux 5.7's Netfilter framework is set to see better performance on modern Intel and AMD systems thanks to AVX2 optimizations.

Queued on Sunday in nf-next as the Netfilter staging grounds are AVX2 optimizations to provide great speed benefits.

Red Hat's Stefano Brivio has provided an AVX2-optimized nft_set_pipapo implementation. AVX2 works out well for optimizing the packet lookup routines of the Netfilter Pile Packet Policies.


In a test of injecting packets directly onto the in-going device path, an AMD EPYC 7402 "Rome" server where the testing took place was found to be significantly faster. The improvements varied from +26% to +420% with many of the tests being above the +100% range with this AVX2 implementation.

With Red Hat caring about all architectures, Stefano is also looking at a similar Arm NEON optimized version moving forward too.

This Netfilter AVX2 nft_set_pipapo implementation should see the light of day with the upcoming Linux 5.7 cycle with it already being part of nf-next.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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