Scheduling on Power-Heterogeneous Processors

Session : GTSS2-2 / GTSS2 : Heuristics and approximation algorithms for scheduling problems
Jeudi 11 février 15:00 - 16:40 Salle : CI2-04
Susanne Albers, Evripidis Bampis, Dimitrios Letsios, Giorgio Lucarelli et Richard Stotz

We consider the problem of scheduling a set of jobs, each one specified by its release date, its deadline and its processing volume,on a set of heterogeneous speed-scalable processors, where the energy-consumption rate is processor-dependent. Our objective is to minimize the total energy consumption when both the preemption and the migration of jobs are allowed. We propose a new algorithm based on a compact linear programming formulation. Our method approaches the value of the optimal solution within any desired accuracy for a large set of continuous power functions. Furthermore, we develop a faster combinatorial algorithm based on flows for standard power functions and jobs whose density is lower bounded by a small constant. Finally, we extend and analyze the AVerage Rate (AVR) online algorithm in the heterogeneous setting.

Mots clés : Scheduling, Speed-scaling, Heterogeneous, Approximation algorithms