HPSF Conference 2025

Umpire is an open-source data and memory management library created at Lawrence Livermore National Laboratory (LLNL). Although Umpire is part of the RAJA Portability Suite, it was made to be modular and can therefore be used with Kokkos and other performance portability abstractions. Umpire provides memory pools which avoid expensive calls to the underlying device-specific API making allocations, large or small, performant in HPC environments. Umpire provides numerous types of memory resources and allocators (i.e. Device, Host, Unified Memory, IPC Shared Memory, etc.). In this talk, I will discuss key Umpire features and capabilities and showcase a Kokkos example with Umpire.