Exploring the use of novel programming models in land surface models
A wide range of programming models are currently under rapid development to meet the needs of application developers looking to work on more complex machines. These models fill a variety of roles. Some look to abstract supercomputer architecture, including both processors and memory, to present a strategy for portable performance across a wide range of machines. Others look to expose concurrency by explicitly constructing task-driven dependency graphs that allow a scheduler to find parallelism. Here we explore the implications for application codes of adopting two such programming models, Kokkos and Legion, one from each class of models. We specifically focus on the software design implications on refactoring existing applications, rather than the performance and performance tuning of these models. We identify a strategy for refactoring the Energy Exascale Earth System Model's Land Surface Model, an extremely complex code for climate applications, and prototype a series of mini-apps that explore the adoption of Kokkos and Legion. In doing this, we identify commonalities across the models, leading to a series of conclusions about application software design and refactoring for the adoption of novel programming models.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Biological and Environmental Research (BER); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1606997
- Resource Relation:
- Conference: International Conference for High Performance Computing, Networking, Storage, and Analysis (SC19): Parallel Applications Workshop, Alternatives To MPI+X - Denver, Colorado, United States of America - 11/17/2019 10:00:00 AM-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of the Breakthrough Vorcat Technology for Cloud-Based Complex Energy Simulations
Development of the Breakthrough Vorcat Technologyfor Cloud-Based Complex Energy Simulations