Towards Performance Portable Programming for Distributed Heterogeneous Systems

TL;DR

This paper presents a runtime framework that simplifies programming for distributed heterogeneous systems, achieving significant performance improvements and portability across diverse hardware architectures.

Contribution

It introduces a scalable runtime system that enables performance portability and efficient resource utilization in heterogeneous distributed high-performance computing environments.

Findings

Up to 300% improvement in shared memory benchmarks

Up to 10x reduction in distributed device communication latency

40% performance gain in a distributed Jacobi application

Abstract

Hardware heterogeneity is here to stay for high-performance computing. Large-scale systems are currently equipped with multiple GPU accelerators per compute node and are expected to incorporate more specialized hardware in the future. This shift in the computing ecosystem offers many opportunities for performance improvement; however, it also increases the complexity of programming for such architectures. This work introduces a runtime framework that enables effortless programming for heterogeneous systems while efficiently utilizing hardware resources. The framework is integrated within a distributed and scalable runtime system to facilitate performance portability across heterogeneous nodes. Along with the design, this paper describes the implementation and optimizations performed, achieving up to 300% improvement in a shared memory benchmark and up to 10 times in distributed device communication. Preliminary results indicate that our software incurs low overhead and achieves 40% improvement in a distributed Jacobi proxy application while hiding the idiosyncrasies of the hardware.