[LA-SiGMA-TESC] Fwd: Video: Experience in porting Fortran code to GPUs with OpenACC

[Jian Tao]

-------- Forwarded Message --------
Subject: 	Video: Experience in porting Fortran code to GPUs with OpenACC
Date: 	Thu, 24 Sep 2015 21:07:38 +0000
From: 	Foertter, Fernanda S. <foertterfs at ornl.gov>
To: 	technical at openacc.org <technical at openacc.org>



   Experience in porting Fortran code to GPUs with OpenACC

Speakers: Mike Zingale and Adam Jacobs

We describe our efforts to put large physics modules written in Fortran
onto the GPUs. Our main target is integrating stiff systems of ODEs
describing nuclear reactions. Our strategy is to put the entire
integration: righthand side evaluations, Jacobian construction, and the
actual timestepping onto the GPUs. This minimizes the communication
costs — only the initial state vector is passed in, and the new state
vector comes out at the end. We will discuss the challenges we had in
getting the compilers to accept modern Fortran constructions with
OpenACC and discuss preliminary results.


https://vimeo.com/140322028

Happy Computing!
Fernanda

--------------------------------------------------------
Fernanda Foertter
National Center for Computational Sciences
HPC User Assistance and Outreach Group
Oak Ridge National Laboratory
O: 865-576-9391 F: 865-241-2850
foertterfs at ornl.gov