NDLI: Assigning Real-Time Tasks on Heterogeneous Multiprocessors with Two Unrelated Types of Processors

Content Provider	IEEE Xplore Digital Library
Author	Andersson, B. Raravi, G. Bletsas, K.
Copyright Year	2010
Abstract	Consider the problem of scheduling a set of implicit deadline sporadic tasks on a heterogeneous multiprocessor platform to meet all deadlines. Tasks cannot migrate and each processor is either of type-1 or type-2 (with each task having different execution speed on each processor type). We present a new algorithm, FF-3C, for this problem. FF-3C offers low time-complexity and provably good performance. Specifically, (i) its time-complexity is O(n*max(m,log n)), where n is the number of tasks and m is the number of processors and (ii) it offers the guarantee that if a task set can be scheduled by an optimal task assignment scheme to meet deadlines then FF-3C meets deadlines as well if given processors twice as fast. We also present several extensions to FF-3C, these offer the same time-complexity and performance guarantee as that of FF-3C but in addition, they offer improved average-case performance. Via experiments with randomly generated task sets, we compare the performance of our new algorithms and two established state-of-art algorithms (and variations of the latter). We evaluate algorithms based on (i) running time and (ii) the necessary multiplication factor, i.e., the amount of extra speed of processors the algorithm needs, for a given task set, so as to succeed, compared to an optimal task assignment scheme. Overall our new algorithms compare favorably to the state-of-art. One in particular (FF-4C-COMB), in our experimental evaluations, runs 12000 to 160000 times faster and has significantly smaller necessary multiplication factor than state-of-art algorithms.
Starting Page	239
Ending Page	248
File Size	461719
Page Count	10
File Format	PDF
ISBN	9780769542980
ISSN	10528725
DOI	10.1109/RTSS.2010.32
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-11-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Program processors Algorithm design and analysis Signal processing algorithms Real time systems Graphics Scheduling algorithm
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Hardware and Architecture Software

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