Re:AMD EPYC Performance Testing with systemd
by CitizenKane on Thursday July 12, 2018 @05:27PM
(#17518766)
It could be the overall memory bandwidth. Being able to write to various sticks at the same time could do a lot, especially in a CPU with this many cores
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Re:AMD EPYC Performance Testing with systemd
by kinghajj on Thursday July 12, 2018 @05:59PM
(#17518970)
It's definitely a memory bandwidth issue, since ThreadRipper 1 has two dies, each of which have direct access to two DIMMs. So if you only have two DIMMs total, one die has to go through InfinityFabric to the other for all memory accesses.