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- W4384755779 abstract "Modern computer systems are characterized by deep memory hierarchies, composed of main memory, multiple layers of cache, and other specialized types of memory. In parallel and distributed systems, additional memory layers are added to this hierarchy. Achieving good performance for computational science applications, in terms of execution time, depends on the efficient use of this diverse and hierarchical memory. This paper revisits the use of space-filling curves to specify the ordering in memory of data structures used in representative scientific applications executing on parallel machines containing clusters of multicore CPUs with attached GPUs. This work examines the hypothesis that space-filling curves, such as Hilbert and Morton ordering, can improve data locality and hence result in more efficient data movement than row or column-based orderings. First, performance results are presented that show for what application parameterizations and machine characteristics this is the case, and are interpreted in terms of how an application interacts with the computer hardware and low-level software. This research particularly focuses on the use of stencil-based applications that form the basis of many scientific computations. Second, how space-filling curves impact data sharing in nearest-neighbour and stencil-based codes is considered." @default.
- W4384755779 created "2023-07-20" @default.
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- W4384755779 date "2023-07-15" @default.
- W4384755779 modified "2023-10-14" @default.
- W4384755779 title "The Impact of Space-Filling Curves on Data Movement in Parallel Systems" @default.
- W4384755779 doi "https://doi.org/10.48550/arxiv.2307.07828" @default.
- W4384755779 hasPublicationYear "2023" @default.
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