  The Crossroads supercomputer was designed to simulate some of the most
complex physical devices in the world. These simulations routinely require 1/2
petabyte or more of system memory running on thousands of compute nodes for
months at a time on the most powerful supercomputers. Improvements in time to
solutions for these workloads can have major impact on our mission
capabilities. In this paper we present early results of representative
application workloads on 4th Gen Intel Xeon and Intel Xeon Processors codenamed
Sapphire Rapids with HBM. These results demonstrate an extremely promising
8.57x improvement (node to node) over our prior generation Intel Broadwell
(BDW) based HPC systems. No code modifications were required to achieve this
speedup, providing a compelling path forward toward major reductions in time to
solution and the complexity of physical systems that can be simulated in the
future.
