A 3/2-Dual Approximation Algorithm for Scheduling Independent Monotonic Malleable Tasks - Laboratoire de Modélisation et de Calcul Access content directly
Preprints, Working Papers, ... Year : 2001

A 3/2-Dual Approximation Algorithm for Scheduling Independent Monotonic Malleable Tasks

Grégory Mounié
Christophe Rapine
Denis Trystram

Abstract

A malleable task is a computational unit which may be executed on any arbitrary number of processors whose execution time depends on the amount of resources alloted to is. This paper presents a new approach for scheduling a set of independent malleable tasks which leads to a worst case guarantee of 3/2+epsilon for the minimization of the parallel execution time, for any fixed epsilon>0. The main idea of this approach is to focus on the determination of a good allotment, then, to solve the resulting problem with a fixed number of processors by a simple scheduling algorithm. The first phase is based on a dual approximation technique where the allotment problem is expressed as a knapsack problem for partitionning the set of tasks into two shelves of respective height 1 and 1/2.
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Dates and versions

hal-00002166 , version 1 (01-07-2004)
hal-00002166 , version 2 (02-12-2004)

Identifiers

  • HAL Id : hal-00002166 , version 1

Cite

Grégory Mounié, Christophe Rapine, Denis Trystram. A 3/2-Dual Approximation Algorithm for Scheduling Independent Monotonic Malleable Tasks. 2001. ⟨hal-00002166v1⟩
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