Journal
ACM TRANSACTIONS ON DESIGN AUTOMATION OF ELECTRONIC SYSTEMS
Volume 12, Issue 2, Pages -Publisher
ASSOC COMPUTING MACHINERY
DOI: 10.1145/1230800.1230803
Keywords
algorithms; performance; dynamic voltage scaling; fixed priority; low power; scheduling; transition overhead
Funding
- Direct For Computer & Info Scie & Enginr
- Division Of Computer and Network Systems [0969013] Funding Source: National Science Foundation
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Time transition overhead is a critical problem for hard real-time systems that employ dynamic voltage scaling (DVS) for power and energy management. While it is a common practice of much previous work to ignore transition overhead, these algorithms cannot guarantee deadlines and/or are less effective in saving energy when transition overhead is significant and not appropriately dealt with. In this article we introduce two techniques, one offline and one online, to correctly account for transition overhead in preemptive fixed-priority real-time systems. We present several DVS scheduling algorithms that implement these methods that can guarantee task deadlines under arbitrarily large transition time overheads and reduce energy consumption by as much as 40% when compared to previous methods.
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