Most parallel and distributed platforms available today show a large unbalance between slow communications and fast local computations which makes the scheduling of tasks much harder to handle efficiently. The so called scheduling with large communication delays problem has been proved to be NP-hard even in some restricted cases. Its status regarding approximation is still unknown. In this work, we propose to study this challenging problem for graphs with a specific structure of 2-dimensional grids. More precisely, we provide lower and upper bounds for both sub-problems of unbounded number of processors and two processors. We show in both cases that the proposed scheduling algorithms are close to lower bounds.
Accepté le :
DOI : 10.1051/ro/2014048
Mots clés : Parallel processing, scheduling, large communication delays
@article{RO_2015__49_2_369_0,
author = {Daoudi, E.M. and Trystram, D. and Wagner, F.},
editor = {Blazewicz, Jacek and Pesch, Erwin and Philipps, Cynthia and Trystram, Denis and Zhang, Guochuan},
title = {Scheduling 2-dimensional grids with large communication delays},
journal = {RAIRO - Operations Research - Recherche Op\'erationnelle},
pages = {369--381},
publisher = {EDP-Sciences},
volume = {49},
number = {2},
year = {2015},
doi = {10.1051/ro/2014048},
zbl = {1310.90044},
language = {en},
url = {http://www.numdam.org/articles/10.1051/ro/2014048/}
}
TY - JOUR AU - Daoudi, E.M. AU - Trystram, D. AU - Wagner, F. ED - Blazewicz, Jacek ED - Pesch, Erwin ED - Philipps, Cynthia ED - Trystram, Denis ED - Zhang, Guochuan TI - Scheduling 2-dimensional grids with large communication delays JO - RAIRO - Operations Research - Recherche Opérationnelle PY - 2015 SP - 369 EP - 381 VL - 49 IS - 2 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/ro/2014048/ DO - 10.1051/ro/2014048 LA - en ID - RO_2015__49_2_369_0 ER -
%0 Journal Article %A Daoudi, E.M. %A Trystram, D. %A Wagner, F. %E Blazewicz, Jacek %E Pesch, Erwin %E Philipps, Cynthia %E Trystram, Denis %E Zhang, Guochuan %T Scheduling 2-dimensional grids with large communication delays %J RAIRO - Operations Research - Recherche Opérationnelle %D 2015 %P 369-381 %V 49 %N 2 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/ro/2014048/ %R 10.1051/ro/2014048 %G en %F RO_2015__49_2_369_0
Daoudi, E.M.; Trystram, D.; Wagner, F. Scheduling 2-dimensional grids with large communication delays. RAIRO - Operations Research - Recherche Opérationnelle, Tome 49 (2015) no. 2, pp. 369-381. doi : 10.1051/ro/2014048. http://www.numdam.org/articles/10.1051/ro/2014048/
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