Towards Dynamic Message Passing Protocols for Stencil-Based Communication Patterns

Halo-exchange communication patterns occur in many stencil-based HPC applications such as MiniAMR, MiniGhost, and MILC. In this pattern, each process performs a mix of inter-node and intra-node transfers. Depending on the input and processor grid size, the amount of time spent in inter-node or intra...

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Bibliographic Details
Published in:Proceedings / IEEE International Conference on Cluster Computing pp. 1 - 12
Main Authors: Suresh, Kaushik Kandadi, Ramesh, Bharath, Kuncham, Goutham Kalikrishna Reddy, Subramoni, Hari, Panda, Dhabaleswar K. DK
Format: Conference Proceeding
Language:English
Published: IEEE 02.09.2025
Subjects:
3D-stencil
Benchmark testing
Cluster computing
dynamic protocols
Libraries
Message passing
MPI
overlap
Protocols
Runtime
Switches
Three-dimensional displays
Tuning
ISSN:2168-9253
Online Access:Get full text
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Summary:Halo-exchange communication patterns occur in many stencil-based HPC applications such as MiniAMR, MiniGhost, and MILC. In this pattern, each process performs a mix of inter-node and intra-node transfers. Depending on the input and processor grid size, the amount of time spent in inter-node or intra-node could dominate the total communication time. Therefore, in this work, we propose a dynamic protocol for intranode and inter-node transfers that optimizes the communication time. With the proposed designs, we show up to 48% improvements over state-of-the-art libraries in 3D stencil communication benchmarks and 28% in the MiniAMR application at a scale of 2304 processes.
ISSN:2168-9253
DOI:10.1109/CLUSTER59342.2025.11186470