PRACTICAL EXPERIENCE IN THE NUMERICAL DANGERS OF HETEROGENEOUS COMPUTING

Citation
Ls. Blackford et al., PRACTICAL EXPERIENCE IN THE NUMERICAL DANGERS OF HETEROGENEOUS COMPUTING, ACM transactions on mathematical software, 23(2), 1997, pp. 133-147
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Computer Sciences",Mathematics,"Computer Science Software Graphycs Programming",Mathematics
ISSN journal
0098-3500
Volume
23
Issue
2
Year of publication
1997
Pages
133 - 147
Database
ISI
SICI code
0098-3500(1997)23:2<133:PEITND>2.0.ZU;2-Z
Abstract
Special challenges exist in writing reliable numerical library softwar e for heterogeneous computing environments. Although a lot of software for distributed-memory parallel computers has been written, porting t his software to a network of workstations requires careful considerati on. The symptoms of heterogeneous computing failures can range from er roneous results without warning to deadlock. Some of the problems are straightforward to solve, but for others the solutions are not so obvi ous, or incur an unacceptable overhead. Making software robust on hete rogeneous systems often requires additional communication. We describe and illustrate the problems encountered during the development of Sca LAPACK and the NAG Numerical PVM Library. Where possible, we suggest w ays to avoid potential pitfalls, or if that is not possible, we recomm end that the software not be used on heterogeneous networks.