NDLI: Cool shapers: Shaping real-time tasks for improved thermal guarantees

Content Provider	IEEE Xplore Digital Library
Author	Kumar, P. Thiele, L.
Copyright Year	2011
Description	Author affiliation: Computer Engineering and Networks Laboratory, ETH Zürich, Switzerland (Kumar, P.; Thiele, L.)
Abstract	With increasing power densities, managing on-chip temperatures has become an important design challenge. We propose a novel approach to this problem with the use of shapers to dynamically and selectively insert idle times during the execution of hard real-time jobs on a single speed processor. For the class of leaky bucket shapers which have a light-weight implementation, we derive the shaper such that no job misses its real-time deadline and the peak temperature is optimally reduced. The analysis and design of such shapers allows for dynamically variable streams of jobs; for instance, periodic streams with jitter. We extend our results to consider non-zero power and timing overhead in transitioning to the idle mode. With experimental results, we demonstrate that the proposed approach provides a large improvement: on average 8K peak temperature reduction or 40% increase in utilization for a given peak temperature.
Starting Page	468
Ending Page	473
File Size	458263
Page Count	6
File Format	PDF
ISBN	9781450306362
ISSN	85644924
e-ISBN	9781450306362
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Association for Computing Machinery, Inc. (ACM)
Subject Keyword	Real time systems Delay Optical wavelength conversion Mathematical model Hardware System-on-a-chip Shapers Real-Time Systems Thermal Management
Content Type	Text
Resource Type	Article

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