OSU MPI Get Bandwidth Test v7.2 with OpenMPI 4.1.6 on Fram & Betzy
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Jean Iaquinta
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University of Oslo
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OSU MPI Get Bandwidth Test v7.2 with OpenMPI 4.1.6 on Fram & Betzy
doi: 10.24424/zcq6-9r81
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date published: 2024-01-05 14:14:55.022211+00:00
description: The Ohio State University (OSU) Micro Benchmarks (OMB) are a widely used suite of benchmarks for measuring and evaluating the performance of MPI operations for point-to-point, multi-pair, and collective communications. These benchmarks are often used for comparing different Message Passing Inerface (MPI) implementations and the underlying network interconnect. Here we use the OSU micro-benchmark (version 7.2) to assess the performance in terms of bandwidth achieved with an Apptainer container between 2 processors on different nodes with OpenMPI (version 4.1.6) on the Norwegian academic High Performance Computers (HPC) located in Tromsø (Fram) and Trondheim (Betzy).
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cite-as: Iaquinta, Jean. "OSU MPI Get Bandwidth Test v7.2 with OpenMPI 4.1.6 on Fram & Betzy." ROHub. Jan 05 ,2024. https://doi.org/10.24424/zcq6-9r81.

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description: Plot showing the bandwidth as a function of the message size on Fram and Betzy
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OSU7.2-Fram-Betzy
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description: Output of the OSU MPI Get Bandwidth Test with openMPI 4.1.6 on Fram and Betzy
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Open MPI for HPE Cray EX Systems
author: Jean Iaquinta
creator: Jean Iaquinta
date created: 2024-01-17 10:54:09.114061+00:00
date modified: 2024-01-17 10:54:10.405249+00:00
description: Abstract—Open MPI is an open-source implementation of the MPI-3 standard that is developed and maintained by collaborators from academia, industry, and national laboratories. Oak Ridge National Laboratory (ORNL) and Los Alamos National Laboratory (LANL) are collaborating on porting and optimizing Open MPI and related components for use on HPE Cray EX systems, with a focus on the DOE Frontier and Aurora exa-scale systems. A key component of this effort involves development of a new LinkX Open Fabrics Interface (OFI) provider. In this paper, we describe enhancements to Open MPI, OpenPMIx runtime components, and the LinkX OFI provider. Performance results are presented for point to point and collective communication operations using both the vendor CXI provider and the LinkX provider, including results obtained using GPU accelerators. Recommended deployment options for EX systems will be discussed, along with future work.
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