Porting HPC Applications to AMD Instinct^TM MI300A Using Unified Memory and OpenMP

2024/05/01 by Suyash Tandon, Tandon, Suyash, Leopold Grinberg +12 · 3 voices · 4 citations
Computer Science · #Advanced Data Storage Technologies #Distributed and Parallel Computing Systems #cs.DC

paper · pdf · doi:10.48550/arxiv.2405.00436

openalex publication_date 2024/05/01 · openalex created_date 2024/05/04 · openalex updated_date 2026/07/28

Abstract

AMD Instinct^TM MI300A is the world's first data center accelerated processing unit (APU) with memory shared between the AMD "Zen 4" EPYC^TM cores and third generation CDNA^TM compute units. A single memory space offers several advantages: i) it eliminates the need for data replication and costly data transfers, ii) it substantially simplifies application development and allows an incremental acceleration of applications, iii) is easy to maintain, and iv) its potential can be well realized via the abstractions in the OpenMP 5.2 standard, where the host and the device data environments can be unified in a more performant way. In this article, we provide a blueprint of the APU programming model leveraging unified memory and highlight key distinctions compared to the conventional approach with discrete GPUs. OpenFOAM, an open-source C++ library for computational fluid dynamics, is presented as a case study to emphasize the flexibility and ease of offloading a full-scale production-ready application on MI300 APUs using directive-based OpenMP programming.

Cited by

• SPUMA: a minimally invasive approach to the GPU porting of OPENFOAM
• Investigating Matrix Repartitioning to Address the Over- and Undersubscription Challenge for a GPU-based CFD Solver
• Dissecting CPU-GPU Unified Physical Memory on AMD MI300A APUs
• Building an Accelerated OpenFOAM Proof-of-Concept Application using Modern C++

Discussions

• Porting HPC Applications to AMD Instinct MI300A Using Unified Memory and OpenMP [hn, 95 points, 27 comments]
• Porting HPC Applications to AMD MI300A Using Unified Memory and OpenMP [hn, 2 points, 0 comments]
• Porting HPC Applications to AMD Instinct MI300A Using Unified Memory and OpenMP (arxiv.org) Main Link | Discussion [bsky, 0 points, 0 comments]

Related

• Dissecting CPU-GPU Unified Physical Memory on AMD MI300A APUs
• Inter-APU Communication on AMD MI300A Systems via Infinity Fabric: a Deep Dive
• DiOMP-Offloading: Toward Portable Distributed Heterogeneous OpenMP
• Building an Accelerated OpenFOAM Proof-of-Concept Application using Modern C++
• Unified Shared Memory in OpenMP: Implementation, Programmability, and Performance on Intel Accelerators