Loring, Burlen, Wolf, Matthew, Kress, James, Shudler, Sergei, Gu, Junmin, Rizzi, Silvio, Logan, Jeremey, Ferrier, Nicola, and Bethel, E Wes. Wed . "Improving Performance of M-to-N Processing and Data Redistribution in In Transit Analysis and Visualization". United States. https://www.osti.gov/servlets/purl/1619182.
In an in transit setting, a parallel data producer, such as a numerical simulation, runs on one set of ranks M, while a data consumer, such as a parallel visualization application, runs on a different set of ranks N. One of the central challenges in this in transit setting is to determine the mapping of data from the set of M producer ranks to the set of N consumer ranks. This is a challenging problem for several reasons, such as the producer and consumer codes potentially having different scaling characteristics and different data models. The resulting mapping from M to N ranks can have a significant impact on aggregate application performance. In this work, we present an approach for performing this M-to-N mapping in a way that has broad applicability across a diversity of data producer and consumer applications. We evaluate its design and performance with a study that runs at high concurrency on a modern HPC platform. By leveraging design characteristics, which facilitate an “intelligent” mapping from M-to-N, we observe significant performance gains are possible in terms of several different metrics, including time-to-solution and amount of data moved.Read Publication
Last Updated: June 17, 2020 - 2:06 pm