Viper hardware details

This page summarizes additional details on the Viper hardware and presents performance measurements from microbenchmarks.

Empirical Roofline Models

Below, empirical roofline plots are presented that are based on measurements made on CPU nodes with two of the available memory configurations: the standard nodes with 512 GB per node show a lower memory bandwidth than the larger nodes with 768 GB. Roofline models illustrate the limitations of a computational kernel due to either the memory bandwidth or the maximum floating point performance of the hardware, depending on the arithmetic intensity of that kernel.