Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

Progress towards accelerating HOMME on hybrid multi- core systems

Journal Article · · International Journal of High Performance Computing Applications
OSTI ID:1050267
 [1];  [1];  [1];  [2];  [1];  [3];  [1];  [4]
  1. ORNL
  2. Cray, Inc.
  3. NOAA, Boulder, CO
  4. Sandia National Laboratories (SNL)
+ Show Author Affiliations
The suitability of a spectral element based dynamical core (HOMME) within the Community Atmospheric Model (CAM) for GPU-based architectures is examined and initial performance results are reported. This work was done within a project to enable CAM to run at high resolution on next generation, multi-petaflop systems. The dynamical core is the present focus because it dominates the performance profile of our target problem. HOMME enjoys good scalability due to its underlying cubed-sphere mesh with full two-dimensional decomposition and the localization of all computational work within each element. The thread blocking and code changes that allow HOMME to effectively use GPUs are described along with a rewritten vertical remapping scheme which improves performance on both CPUs and GPUs. Validation of results in the full HOMME model is also described. Remaining issues affecting performance include optimizing the boundary exchanges for the case of multiple spectral elements being computed on the GPU and using multiple CUDA streams to overlap data transfers with computations.
Research Organization:
Oak Ridge National Laboratory (ORNL); Center for Computational Sciences
Sponsoring Organization:
SC USDOE - Office of Science (SC)
DOE Contract Number:
AC05-00OR22725
OSTI ID:
1050267
Journal Information:
International Journal of High Performance Computing Applications, Journal Name: International Journal of High Performance Computing Applications Journal Issue: 0 Vol. 0
Country of Publication:
United States
Language:
English

Similar Records

Toward a Non-Hydrostatic HOMME
Technical Report · Tue Aug 14 00:00:00 EDT 2012 · OSTI ID:1348890
A Petascale Non-Hydrostatic Atmospheric Dynamical Core in the HOMME Framework
Technical Report · Tue Sep 15 00:00:00 EDT 2015 · OSTI ID:1241514
Fault Diagnosis of Hybrid Computing Systems Using Chaotic-Map Method
Book · Thu Nov 01 00:00:00 EDT 2018 · OSTI ID:1561635

Related Subjects

99 GENERAL AND MISCELLANEOUS
PERFORMANCE
RESOLUTION
TARGETS
VALIDATION