Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Accelerating quantum many-body configuration interaction with directives   Many-Fermion Dynamics-nuclear, or MFDn, is a configuration interaction (CI)
code for nuclear structure calculations. It is a platform-independent Fortran
90 code using a hybrid MPI+X programming model. For CPU platforms the
application has a robust and optimized OpenMP implementation for shared memory
parallelism. As part of the NESAP application readiness program for NERSC's
latest Perlmutter system, MFDn has been updated to take advantage of
accelerators. The current mainline GPU port is based on OpenACC. In this work
we describe some of the key challenges of creating an efficient GPU
implementation. Additionally, we compare the support of OpenMP and OpenACC on
AMD and NVIDIA GPUs.

37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci