A load balancing strategy for parallel computation of sparse?permanents

作者：Wang, Lei; Liang, Heng^*; Bai, Fengshan; Huo, Yan

来源：Numerical Linear Algebra with Applications, 2012, 19(6): 1017-1030.

DOI：10.1002/nla.1844

• sparse matrix
• approximate algorithm
• permanent
• parallel computation
• load balancing
• accelerated ratio

The research in parallel machine scheduling in combinatorial optimization suggests that the desirable parallel efficiency could be achieved when the jobs are sorted in the non-increasing order of processing times. In this paper, we find that the time spending for computing the permanent of a sparse matrix by hybrid algorithm is strongly correlated to its permanent value. A strategy is introduced to improve a parallel algorithm for sparse permanent. Methods for approximating permanents, which have been studied extensively, are used to approximate the permanent values of submatrices to decide the processing order of jobs. This gives an improved load balancing method. Numerical results show that the parallel efficiency is improved remarkably for the permanents of fullerene graphs, which are of great interests in nanoscience.

• 出版日期2012-12
• 单位常州工学院; 清华大学