Gen X Performance Tuning

This post details Cloudflare's in-depth performance tuning efforts for their AMD EPYC 7642 processors in their Gen X servers. It explores the nuances of Thermal Design Power (TDP) and dynamic power, the impact of determinism modes (Performance vs. Power), and the benefits of Configurable TDP (cTDP). The post quantifies the gains achieved, including an additional 6% performance throughput from out-of-the-box tuning, with further improvements of 2% and 4% from power determinism and cTDP adjustments respectively. It also touches upon the Nodes Per Socket (NPS) configuration, noting no significant performance deltas observed.