Exploring The Zen 5 SMT Performance With The AMD EPYC 9755 "Turin" CPU
Written by Michael Larabel in Processors on 17 October 2024 at 01:38 PM EDT. Page 3 of 6. 25 Comments.
👁 ClickHouse benchmark with settings of 100M Rows Hits Dataset, Second Run. SMT Off was the fastest.
The ClickHouse database server saw slightly better performance when SMT was disabled on this 128-core Zen 5 server. The CPU power use was similar regardless of Simultaneous Multi-Threading being enabled.
Meanwhile for the PostgreSQL database server with read-focused workloads, SMT proved beneficial with lower latency and around a 20% bump to the transactions per second with SMT enabled.
SMT left enabled was beneficial to a number of other database workloads too.
The Coremark CPU benchmark saw around 30% better performance with SMT on the EPYC 9755 and without any added power use.