Image

OLCF Events

Date

Dec 16 2015

Location

Bldg. 5600, C101
ORNL

Organizer

Suzanne Parete-Koon
Phone
865-576-6599
Email
paretekoonst@ornl.gov

2015 OLCF Users Conference Call: Globus Simplified, OpenACC Hackathon User Experience.

The OLCF hosts monthly User Conference Call. These calls are your opportunity to speak with center personnel to get the latest updates, express any concerns you may have, etc. No registration is required for this event.

Monthly Topics: Globus Simplified, OpenACC Hackathon User Experience.

We will give a brief tutorial of the new simplified way to do Globus transfers from OLCF (no OSG certificate required).

Slides: 20151216_user-call_globus

Globus video: Click here.

User Driven Content: User Philip LoCascio will give a talk about his experience with testing the GCC5 compiler and OpenACC at the last OpenACC Hackathon.

He states, “I tested OpenACC with the GCC5/6 compiler. There are a number of codes that have yet to be GPU optimized and GCC5/6 appeared a widely deployed platform and development route for other applications. Despite the compiler being available for a few months, there were not any good examples using it due to the build dependencies. Therefore, I wrote an auto build script, suitable for testing the compiler on non-root systems e.g. Supercomputers using an example OpenACC code that calculated pi as an objective test.

I added the OpenACC code to deploy on a GPU in Fortran, testing both SM_30 and SM_50 architectures, vector lengths and compared this with the same problem implemented in OpenMP with 32 CPU threads. OpenACC looks as if it may well be powerful enough to augment CUDA in some apps (e.g. GROMACS), and maybe replace it entirely in others (e.g. BLAST). Full scale application deployment has not yet been tested with GCC5/6.”

Video of Philip’s talk: https://vimeo.com/149295776