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Keep it cool and in...
Keep it cool and in time : With runtime monitoring to thermal-aware execution speeds for deadline constrained systems
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- Lampka, Kai (författare)
- Uppsala universitet,Datorteknik,Embedded Systems
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- Forsberg, Björn (författare)
- Uppsala universitet,Institutionen för informationsteknologi
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- Spiliopoulos, Vasileios (författare)
- Uppsala universitet,Datorarkitektur och datorkommunikation,UART
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(creator_code:org_t)
- Elsevier BV, 2016
- 2016
- Engelska.
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Ingår i: Journal of Parallel and Distributed Computing. - : Elsevier BV. - 0743-7315 .- 1096-0848. ; 95, s. 79-91
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The Dynamic Power and Thermal Management (DPTM) system of Dynamic Voltage Frequency Scaling (DVFS) enabled processors compensates peak temperatures by slowing or even powering parts of the system down. While ensuring the integrity of computations, this comes with the drawback of losing performance. In the context of hard real-time systems, such unpredictable losses in performance are unacceptable, as they may lead to deadline misses which may yet compromise the integrity of the system. To safely execute hard real-time workloads on such systems, this article presents an online scheme for assigning speeds in such a way that (a) the system executes at low clock speed as often as possible, while (b) deadline violations are strictly ruled out. The proposed scheme is compared with an offline scheme which has complete knowledge about arrival times and execution demands of the workload. The benchmarking shows that for a workload which is always very close to the modelled maximum, our approach performs on-par with the offline scheme. In case of a workload which diverges from the modelled maximum more often, the speed assignments produced by our scheme become more pessimistic, as to ensure that all deadlines are met.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datorteknik (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Engineering (hsv//eng)
Nyckelord
- Real-time computing; Multicore architectures; Dynamic Voltage Frequency Scaling; Dynamic power and temperature management; Run-time monitoring; Online real-time scheduling
- Datavetenskap med inriktning mot inbyggda system
- Computer Science with specialization in Embedded Systems
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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