HPSF Conference 2025

This presentation covers the beginnings of the Yet Another Kernel Launcher (YAKL) C++ portability library, its evolution alongside Kokkos, the use of Kokkos in its current form, and remaining issues before it can be retired in lieu of using Kokkos instead. The primary outstanding issues are the inclusion of arbitrary lower bounds for Fortran-like View behavior and the ability to use an underlying pool allocator for Views for cheap frequent device allocation and deallocation so that Views can be locally created and destroyed only where needed rather than existing for the global lifetime of simulations. This may improve readability and reduce the memory high water mark in simulations. A few performance related issues will be covered as well, mainly limited to MDRangePolicy and parallel_for register usage.