Scheduling on hierarchical clusters using malleable tasks

  • Authors:
  • Pierre-François Dutot;Denis Trystram

  • Affiliations:
  • Laboratoire Informatique et Distribution, ZIRST, 51 avenue Jean Kuntzmann, 38330 Montbonnot Saint Martin, France;Laboratoire Informatique et Distribution, ZIRST, 51 avenue Jean Kuntzmann, 38330 Montbonnot Saint Martin, France

  • Venue:
  • Proceedings of the thirteenth annual ACM symposium on Parallel algorithms and architectures
  • Year:
  • 2001

Quantified Score

Hi-index 0.00

Visualization

Abstract

The model of malleable task (MT) was introduced some years ago and has been proved to be an efficient way for implementing parallel applications. It considers a target application at a larger level of granularity than in other models (corresponding typically to numerical routines) where the tasks can themselves be executed in parallel.Clusters of SMP (symmetric Multi-Processors) are a cost effective alternative to parallel supercomputers. Such hierarchical clusters are parallel systems made from m SMP composed each by k identical processors. They are more and more popular, however, designing efficient software that tale full advantage of such systems remains difficult. This work describes a 2 — 2÷k approximation algorithm for scheduling a set of independent malleable tasks for the minimization of the parallel execution time, where k is a power of 2 (k 2). For k = 2, a special treatment leads to the bound of 3/2 which is the best known for non hierarchical tasks. The algorithm presented here is a fully polynomial approximation scheme running in &Ogr;(nmk) time.