A Tunable Implementation of Quality-of-Service Classes for HPC Networks

High-performance computer (HPC) networks are often shared by communication traffic from multiple applications with varying communication characteristics and resource requirements. These applications contend for shared network buffers and channels, potentially resulting in significant performance variations and slowdown of critical communication operations such as low-latency MPI collectives. In order to ensure predictable communication performance, network resources must be allocated relative to the communication requirements of applications.