Large Scale Parallel Structured AMR Calculations using the SAMRAI Framework
This paper discusses the design and performance of the parallel data communication infrastructure in SAMRAI, a software framework for structured adaptive mesh refinement (SAMR) multi-physics applications. We describe requirements of such applications and how SAMRAI abstractions manage complex data communication operations found in them. Parallel performance is characterized for two adaptive problems solving hyperbolic conservation laws on up to 512 processors of the IBM ASCI Blue Pacific system. Results reveal good scaling for numerical and data communication operations but poorer scaling in adaptive meshing and communication schedule construction phases of the calculations. We analyze the costs of these different operations, addressing key concerns for scaling SAMR computations to large numbers of processors, and discuss potential changes to improve our current implementation.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 15006199
- Report Number(s):
- UCRL-JC-144755; TRN: US200405%%335
- Resource Relation:
- Conference: SC2001 Conference on High Performance Networking and Computing, Denver, CO (US), 11/10/2001--11/16/2001; Other Information: PBD: 1 Aug 2001
- Country of Publication:
- United States
- Language:
- English
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