Execution time optimisation using delayed multidimensional retiming
by Yaroub Elloumi; Mohamed Akil; Mohamed Hedi Bedoui
International Journal of High Performance Systems Architecture (IJHPSA), Vol. 5, No. 3, 2015

Abstract: Multidimensional retiming (MR) is a software pipelining approach that ensures increasing the instruction-level parallelism across all the nested loops. All the MR techniques aim at achieving a full parallelism in order to schedule applications with a minimal cycle period. However, the growth of code sizes in terms of parallelism level engenders the rise in cycle period numbers. Thus, fully parallel multidimensional applications frequently face limiting factors when implemented on real-time systems. This paper presents a novel technique, called delayed MR, which schedules nested loops with a minimal cycle period, without achieving full parallelism. It is formulated into two efficient steps whose first one sweeps the nested loops with the target of selecting and ordering paths, whereas the second one applies an optimal MR to the selected paths. Our technique is verified by implementing several nested loops in NVIDIA architectures. The experimental results show that our technique achieves average improvements on execution time of 32.8% compared to the incremental technique and 19.35% compared to the chained one.

Online publication date: Sat, 04-Jul-2015

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

 
Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
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 High Performance Systems Architecture (IJHPSA):
Login with your Inderscience username and password:

Username:        Password:          Forgotten your 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 subs@inderscience.com