Preliminary Experience with OpenMP Memory Management Implementation

Adrien Roussel (1, 2) , Patrick Carribault (1, 2) , Julien Jaeger (1, 2)

1 DAM/DIF - DAM Île-de-France
2 LIHPC - Laboratoire en Informatique Haute Performance pour le Calcul et la simulation

Because 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.

Mots clés: OpenMP 5.0; Data Allocation; Memory Management

Domaines: Calcul parallèle, distribué et partagé [cs.DC]

Adrien Roussel, Patrick Carribault, Julien Jaeger. Preliminary Experience with OpenMP Memory Management Implementation. IWOMP 2020, Sep 2020, Austin, United States. pp.313-327, ⟨10.1007/978-3-030-58144-2_20⟩. ⟨hal-02902719⟩