On the Parallel Elliptic Single/Multigrid Solutions about Aligned and Nonaligned Bodies Using the Virtual Machine for Multiprocessors

A. Averbuch, Gabber, S. Itzikowitz, B. Shoham

Research output: Contribution to journalArticlepeer-review

Abstract

Parallel elliptic single/multigrid solutions around an aligned and nonaligned body are presented and implemented on two multi-user and single-user shared memory multiprocessors (Sequent Symmetry and MOS) and on a distributed memory multiprocessor (a Transputer network). Our parallel implementation uses the Virtual Machine for Multi-Processors (VMMP), a software package that provides a coherent set of services for explicitly parallel application programs running on diverse multiple instruction multiple data (MIMD) multiprocessors, both shared memory and message passing. VMMP is intended to simplify parallel program writing and to promote portable and efficient programming. Furthermore, it ensures high portability of application programs by implementing the same services on all target multiprocessors. The performance of our algorithm is investigated in detail. It is seen to fit well the above architectures when the number of processors is less than the maximal number of grid points along the axes. In general, the efficiency in the nonaligned case is higher than in the aligned case. Alignment overhead is observed to be up to 200% in the shared-memory case and up to 65% in the message-passing case. We have demonstrated that when using VMMP, the portability of the algorithms is straightforward and efficient.

Original languageEnglish
Pages (from-to)13-32
Number of pages20
JournalScientific Programming
Volume3
Issue number1
DOIs
StatePublished - 1994

Fingerprint

Dive into the research topics of 'On the Parallel Elliptic Single/Multigrid Solutions about Aligned and Nonaligned Bodies Using the Virtual Machine for Multiprocessors'. Together they form a unique fingerprint.

Cite this