2021 Fiscal Year Final Research Report
Development of Scalable Non-Blocking Communication Layer with NVDIMM as a Buffer
| Project/Area Number |
19K11991
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 60090:High performance computing-related
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| Research Institution | Kyushu University |
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Principal Investigator |
NANRI Takeshi 九州大学, 情報基盤研究開発センター, 准教授 (70284578)
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | NVDIMM / 通信 / 大規模並列計算 |
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| Outline of Final Research Achievements |
In this study, HyBuf-MP, a scalable asynchronous communication layer has been implemented to enable long message communication overlapping in a massively parallel computing environment. The feature of this communication layer is that not only DRAM but also NVDIMMs can be used as buffer areas for the Eager protocol, which is necessary for communication overlapping, thereby minimizing the consumption of DRAM for communication and achieving communication overlapping of long messages.As a result of this research, since the communication delay of InfiniBand and the acceess delay of NVDIMM are comparable, it was confirmed that the communication buffer combining these two devices is effective in saving DRAM and hiding communication, as expected at the time of the research plan.
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| Free Research Field |
高性能計算
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| Academic Significance and Societal Importance of the Research Achievements |
NVDIMMは、高速性と大容量を兼ね備えた新しい記憶デバイスであり、これを応用した新しいソフトウェア技術の開発が求められている。本研究では、従来DRAM上に実装していた通信バッファをこのNVDIMM上に構築し、十分実用的な性能が得られることを確認した。これにより、通信性能を落とすことなく、大規模並列計算で問題になっていた通信バッファによるDRAMの消費を大幅に削減できる。そのため、本研究の成果は、今後の計算科学やデータ科学におけるプログラムのスケーラビリティ向上に大きく貢献するものである。
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