Hierarchical Scheduling for Moldable Tasks

The model of moldable 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 on any number of processors. 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. These architectures are more and more popular, however designing efficient software that take full advantage of such systems remains difficult. This work describes approximation algorithms for scheduling a set of tree precedence constrained moldable tasks for the minimization of the parallel execution time, with a scheme which is first used for two multi-processors and several bi-processors and then extended to the g...

• Type: Conference
• Year: 2005
• Where: EUROPAR
• Authors: Pierre-François Dutot
• Keywords: EUROPAR 2005, Moldable Tasks, Such Hierarchical Clusters, Symmetric Multi-processors