DocumentCode :
998050
Title :
Executing algorithms with hypercube topology on torus multicomputers
Author :
González, Antonio ; Valero-García, Miguel ; De Cerio, Luis Díaz
Author_Institution :
Dept. d´´Arquitectura de Computadors, Univ. Politecnica de Catalunya, Barcelona, Spain
Volume :
6
Issue :
8
fYear :
1995
fDate :
8/1/1995 12:00:00 AM
Firstpage :
803
Lastpage :
814
Abstract :
Many parallel algorithms use hypercubes as the communication topology among their processes. When such algorithms are executed on hypercube multicomputers the communication cost is kept minimum since processes can be allocated to processors in such a way that only communication between neighbor processors is required. However, the scalability of hypercube multicomputers is constrained by the fact that the interconnection cost-per-node increases with the total number of nodes. From scalability point of view, meshes and toruses are more interesting classes of interconnection topologies. This paper focuses on the execution of algorithms with hypercube communication topology on multicomputers with mesh or torus interconnection topologies. The proposed approach is based on looking at different embeddings of hypercube graphs onto mesh or torus graphs. The paper concentrates on toruses since an already known embedding, which is called standard embedding, is optimal for meshes. In this paper, an embedding of hypercubes onto toruses of any given dimension is proposed. This novel embedding is called xor embedding. The paper presents a set of performance figures for both the standard and the xor embeddings and shows that the latter outperforms the former for any torus. In addition, it is proven that for a one-dimensional torus (a ring) the xor embedding is optimal in the sense that it minimizes the execution time of a class of parallel algorithms with hypercube topology. This class of algorithms is frequently found in real applications, such as FFT and some class of sorting algorithms
Keywords :
hypercube networks; parallel algorithms; communication cost; communication topology; embedding; hypercube communication topology; hypercube multicomputers; hypercube topology; mesh interconnection topologies; parallel algorithms; scalability; sorting algorithms; torus interconnection topologies; torus multicomputers; xor embeddings; Costs; Hardware; Hypercubes; Notice of Violation; Parallel algorithms; Scalability; Sorting; Topology;
fLanguage :
English
Journal_Title :
Parallel and Distributed Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
1045-9219
Type :
jour
DOI :
10.1109/71.406957
Filename :
406957
Link To Document :
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