TY  - JOUR
AU  - Bonati, Claudio
AU  - Calore, Enrico
AU  - D’Elia, Massimo
AU  - Mesiti, Michele
AU  - Negro, Francesco
AU  - Sanfilippo, Francesco
AU  - Schifano, Sebastiano Fabio
AU  - Silvi, Giorgio
AU  - Tripiccione, Raffaele
TI  - Portable multi-node LQCD Monte Carlo simulations using OpenACC
JO  - International journal of modern physics / C
VL  - 29
IS  - 01
SN  - 1793-6586
CY  - Singapore [u.a.]
PB  - World Scientific
M1  - FZJ-2018-03126
SP  - 1850010 -
PY  - 2018
AB  - This paper describes a state-of-the-art parallel Lattice QCD Monte Carlo code for staggered fermions, purposely designed to be portable across different computer architectures, including GPUs and commodity CPUs. Portability is achieved using the OpenACC parallel programming model, used to develop a code that can be compiled for several processor architectures. The paper focuses on parallelization on multiple computing nodes using OpenACC to manage parallelism within the node, and OpenMPI to manage parallelism among the nodes. We first discuss the available strategies to be adopted to maximize performances, we then describe selected relevant details of the code, and finally measure the level of performance and scaling-performance that we are able to achieve. The work focuses mainly on GPUs, which offer a significantly high level of performances for this application, but also compares with results measured on other processors.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000426590000010
DO  - DOI:10.1142/S0129183118500109
UR  - https://juser.fz-juelich.de/record/845928
ER  -