DragonFlyBSD Lands Another NUMA Optimization Helping AMD Threadripper 2 CPUs
Written by Michael Larabel in BSD on 15 October 2018 at 05:30 AM EDT. 4 Comments
BSD --
DragonFlyBSD lead developer Matthew Dillon has been quite impressed with AMD's Threadripper 2 processors particularly the Threadripper 2990WX with 32-cores / 64-threads. Dillon has made various optimizations to DragonFly for helping out this processor in past months and overnight he made another significant improvement.

Matthew Dillon has landed a fix for addressing some NUMA contention in DragonFlyBSD when memory is associated with CPU cores asymmetrically. This will help NUMA platforms in general but specifically the 2990WX is helped a lot since half the CPU cores have no memory directly associated with them.

In eliminating this NUMA memory contention, it's a big performance upgrade yet again for the Threadripper 2990WX. With the change he found about an 8% speed-up in the DragonFly kernel build test.

DragonFlyBSD 5.4 is shaping up to be an interesting release with a lot of improvements -- many focused on the AMD 2990WX but a lot of other enhancements in general.
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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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