Institute for Systems Research Technical Reports

Permanent URI for this collectionhttp://hdl.handle.net/1903/4376

This archive contains a collection of reports generated by the faculty and students of the Institute for Systems Research (ISR), a permanent, interdisciplinary research unit in the A. James Clark School of Engineering at the University of Maryland. ISR-based projects are conducted through partnerships with industry and government, bringing together faculty and students from multiple academic departments and colleges across the university.

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2011 - 20132

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Author: search.filters.author.Srivastava, AnkurSubject: search.filters.subject.3D-IC

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    Fluidic Cooling and Gate Size Co-optimization in 3D-ICs: Pushing the Power-Performance Limits
    (2013) Shi, Bing; Srivastava, Ankur; Srivastava, Ankur
    The performance improvement of modern computer systems is usually accompanied by increased computational power and thermal hotspots, which in turn limit the further improvement of system performance. In 3D-ICs, this thermal problem is significantly exacerbated, necessitating the need for active cooling approaches such as micro-fluidic cooling. This paper investigates a co-optimization approach for 3D-IC electric (gate sizing) and cooling design that fully exploits the interdependency between power, temperature and circuit delay to push the powerperformance tradeoff beyond conventional limits. We propose a unified formulation to model this co-optimization problem and use an iterative optimization approach to solve the problem. The experimental results show a fundamental power-performance improvement, with 12% power saving and 16% circuit speedup.
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    TSV-Constrained Micro-Channel Infrastructure Design for Cooling Stacked 3D-ICs
    (2011-05-11) Shi, Bing; Srivastava, Ankur
    Micro-channel based liquid cooling has significant capability of removing high density heat in 3D-ICs. The conventional micro-channel structures investigated for cooling 3D-ICs use straight channels. However, the presence of TSVs which form obstacles to the micro-channels prevents distribution of straight micro-channels. In this paper, we investigate the methodology of designing TSV-constrained micro-channel infrastructure. Specifically, we decide the locations and geometry of micro-channels with bended structure so that it's cooling e®ectiveness is maximized. Our micro-channel structure could achieve up to 87% pumping power saving compared with the micro-channel structure using straight channels.