A survey of software implementations used by application codes in the Exascale Computing Project

The US Department of Energy Office Science and the National Nuclear Security Administration initiated Exascale Computing Project (ECP) in 2016 to prepare mission-relevant applications scientific software for delivery exascale computers starting 2023. ECP currently supports 24 efforts directed at specific six supporting co-design projects. These application projects contain 62 codes that are implemented three high-level languages—C, C++, Fortran—and use 22 combinations graphical processing unit programming models. most common implementation language is which used 53 different codes. models across CUDA Kokkos, employed 15 14 applications, respectively. This article provides a survey languages codebase will be achieve performance on future hardware platforms.