Extensions to the Multi-Installment Algorithm: Affine Costs and Output Data Transfers

Yang Yang and Henri Casanova
CS2003-0754
July 16, 2003

Divisible workload applications occur in many fields of science and engineering. Although these application can be easily parallelized in a master-worker fashion, they pose several scheduling challenges. Previously proposed scheduling algorithms either distribute work to processors in a single round of work allocation or in multiple rounds. Multi-round algorithms can achieve better overlap of computation and communication but are more difficult to analyze. Consequently, a number of open questions still remain for multi-round scheduling. In this paper we improve on the seminal "multi-installment" algorithm proposed by Bharadwaj. et al. for homogeneous star networks. Their work suffers from two important limitations: (i) communication and computation latencies are assumed to be negligible; and (ii) size of application output data is assumed to be negligible. These two limitations strongly restrict the applicability of multi-installment to real-world platforms and applications. In this paper we remove both limitations.


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