Identification

Title

Performance portability of an intermediate-complexity atmospheric research model in coarray Fortran

Abstract

We examine the scalability and performance of an open-source, coarray Fortran (CAF) mini-application (mini-app) that implements the parallel, numerical algorithms that dominate the execution of The Intermediate Complexity Atmospheric Research (ICAR) [4] model developed at the the National Center for Atmospheric Research (NCAR). The Fortran 2008 mini-app includes one Fortran 2008 implementation of a collective subroutine defined in the Committee Draft of the upcoming Fortran 2018 standard. The ability of CAF to run atop various communication layers and the increasing CAF compiler availability facilitated evaluating several compilers, runtime libraries and hardware platforms. Results are presented for the GNU and Cray compilers, each of which offers different parallel runtime libraries employing one or more communication layers, including MPI, OpenSHMEM, and proprietary alternatives. We study performance on multi- and many-core processors in distributed memory. The results show promising scaling across a range of hardware, compiler, and runtime choices on up to ~100,000 cores.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7dz0c8n

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2018-01-01T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact