Preliminary Experience with OpenMP Memory Management Implementation

International audienceBecause of the evolution of compute units, memory hetero-geneity is becoming popular in HPC systems. But dealing with such various memory levels often requires different approaches and interfaces. For this purpose, OpenMP 5.0 defines memory-management constructs to offer application developers the ability to tackle the issue of exploiting multiple memory spaces in a portable way. This paper proposes an overview of memory-management from applications to runtimes. Thus, we describe a convenient way to tune an application to include memory management constructs. We also detail a methodology to integrate them into an OpenMP runtime supporting multiple memory types (DDR, MC-DRAM and NVDIMM). We implement our design into the MPC framework , while presenting some results on a realistic benchmark