VECTORIZATION OF SOME BLOCK PRECONDITIONED CONJUGATE-GRADIENT METHODS

被引：2
|
作者：
BRUGNANO, L
MARRONE, M
机构：
[1] Dipartimento di Matematica, Università di Bari, 70125 Bari, Via G. Fortunato
来源：
PARALLEL COMPUTING | 1990年 / 14卷 / 02期
关键词：
block preconditioning; Linear algebra; preconditioned conjugate gradient methods; vector processors;
D O I：
10.1016/0167-8191(90)90106-J
中图分类号：
TP301 [理论、方法];
学科分类号：
081202 ;
摘要：
The block preconditioned conjugate gradient methods are very effective to solve the linear systems arising from the discretization of elliptic PDE. Nevertheless, the solution of the linear system Ms = r, to get the preconditioned residual, is a 'bottleneck', on vector processors. In this paper, we show how to modify the algorithm, in order to get better performances, on such computers. Numerical tests carried out on a CRAY X-MP/48 are presented, in order to give numerical evidence. © 1990.
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页码：191 / 198
页数：8
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