A branch-and-bound approach to scheduling of data-parallel tasks on multi-core architectures Online publication date: Wed, 12-Feb-2020
by Yang Liu; Lin Meng; Ittetsu Taniguchi; Hiroyuki Tomiyama
International Journal of Embedded Systems (IJES), Vol. 12, No. 1, 2020
Abstract: This paper studies a task scheduling problem which schedules a set of data-parallel tasks on multiple cores. Unlike most of previous literature where each task is assumed to run on a single core, this work allows individual tasks to run on multiple cores in a data-parallel fashion. Since the scheduling problem is NP-hard, a couple of heuristic algorithms which find near-optimal schedules in a short time were proposed so far. In some cases, however, exactly-optimal schedules are desired, for example, in order to evaluate heuristic algorithms. This paper proposes an exact algorithm to find optimal schedules. The proposed algorithm is based on depth-first branch-and-bound search. In our experiments with up to 100 tasks, the proposed algorithm could successfully find optimal schedules for 135 test cases out of 160 within 12 hours. Even in cases where optimal schedules were not found within 12 hours, our algorithm found better schedules than state-of-the-art heuristic algorithms.
Online publication date: Wed, 12-Feb-2020
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Embedded Systems (IJES):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email firstname.lastname@example.org