High-performance computing environments are constantly evolving, and keeping pace with the latest interconnect technologies is crucial for maximising application performance. However, we cannot rebuild all the software in EESSI that depends on improvements to communication libraries. So how do we take advantage of new technological developments?
Specifically we look at taking benefit of the HPE/Cray Slingshot-11. Slingshot-11 promises to offer a significant advancement in HPC networking, offering improved bandwidth, lower latency, and better scalability for exascale computing workloads … so this should be worth the effort!
In this blog post, we present the requirements for building OpenMPI 5.x with Slingshot-11 support on HPE/Cray systems and its integration with EESSI using the host_injections mechanism of EESSI to inject custom-built OpenMPI libraries. This approach enables overriding EESSI’s default MPI library with an ABI-compatible, Slingshot-optimized version which should give us optimal performance.
Read the full blog post here
