Price-Performance Comparison of Omni-Path and InfiniBand HDR

This white paper presents a detailed price-performance comparison between Cornelis Networks Omni-Path and NVIDIA InfiniBand HDR when running SeisSol on AMD EPYC processors. The objective of the paper is to complement a previous study on the scalability of SeisSol by incorporating a price-performance analysis. The paper outlines the simulation setup, including the use of 64 core dual socket AMD EPYC 7713 nodes and the performance metrics obtained. It documents that Cornelis Omni-Path achieves up to 1.53 times higher price-performance compared to NVIDIA InfiniBand HDR. The paper details the job throughput and run-to-run variability for both technologies, indicating that Cornelis Omni-Path provides more consistent performance. Additionally, it discusses the cost implications of building a 16-node cluster with both technologies, revealing that users can expect to achieve similar job throughput at a significantly lower cost with Cornelis Omni-Path. The findings suggest that Cornelis Omni-Path offers advantages in both performance consistency and cost-effectiveness for high-performance computing applications.