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Documents authored by Kremer, Ulrich


Document
07041 Abstracts Collection – Power-aware Computing Systems

Authors: Luca Benini, Naehyuck Chang, Ulrich Kremer, and Christian W. Probst

Published in: Dagstuhl Seminar Proceedings, Volume 7041, Power-aware Computing Systems (2007)


Abstract
From January 21, 2007 to January 26, 2007, the Dagstuhl Seminar 07041``Power-aware Computing Systems'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and discussed ongoing work and open problems. This report compiles abstracts of the seminar presentations as well as the seminar results and ideas, providing hyperlinks to full papers wherever possible.

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Luca Benini, Naehyuck Chang, Ulrich Kremer, and Christian W. Probst. 07041 Abstracts Collection – Power-aware Computing Systems. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 7041, pp. 1-14, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2007)


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@InProceedings{benini_et_al:DagSemProc.07041.1,
  author =	{Benini, Luca and Chang, Naehyuck and Kremer, Ulrich and Probst, Christian W.},
  title =	{{07041 Abstracts Collection – Power-aware Computing Systems}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7041},
  editor =	{Luca Benini and Naehyuck Chang and Ulrich Kremer and Christian W. Probst},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.07041.1},
  URN =		{urn:nbn:de:0030-drops-11248},
  doi =		{10.4230/DagSemProc.07041.1},
  annote =	{Keywords: Power consumption, energy reduction, compilers, microarchitectures, simulations, experimental frameworks}
}
Document
07041 Summary – Power-aware Computing Systems

Authors: Luca Benini, Naehyuck Chang, Ulrich Kremer, and Christian W. Probst

Published in: Dagstuhl Seminar Proceedings, Volume 7041, Power-aware Computing Systems (2007)


Abstract
The program of the Dagstuhl seminar 07041 on Power-aware Computing Systems featured presentations of about 25 participating researchers from academia and industry. They were chosen to represent major areas in targeting the energy consumption of a computing system – Applications, Compilers, Virtual-execution Environments, Operating Systems, and Hardware. In order to continue the work of the predecessor Dagstuhl seminar held in 2005, the results of that seminar [1] were discussed, with the aim of developing a vision of challenges, problems, and research activities in some of the key areas identified in 2005. The first part of the seminar was dedicated to lively discussions that led to the identification of three areas that were considered being most interesting. As a result, three groups were formed to further identify challenges and opportunities. The results of these groups are presented in this report. In addition, abstracts of the presentations as well as work-in-progress papers are published in these proceedings.

Cite as

Luca Benini, Naehyuck Chang, Ulrich Kremer, and Christian W. Probst. 07041 Summary – Power-aware Computing Systems. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 7041, pp. 1-7, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2007)


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@InProceedings{benini_et_al:DagSemProc.07041.2,
  author =	{Benini, Luca and Chang, Naehyuck and Kremer, Ulrich and Probst, Christian W.},
  title =	{{07041 Summary – Power-aware Computing Systems}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--7},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7041},
  editor =	{Luca Benini and Naehyuck Chang and Ulrich Kremer and Christian W. Probst},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.07041.2},
  URN =		{urn:nbn:de:0030-drops-11232},
  doi =		{10.4230/DagSemProc.07041.2},
  annote =	{Keywords: Power-aware Computing Systems, Low-power Design, Parallelism and Power Consumption}
}
Document
07041 Working Group – Towards Interfaces for Integrated Performance and Power Analysis and Simulation

Authors: Chris Bleakley, Tom Clerckx, Harald Devos, Matthias Grumer, Alex Janek, Ulrich Kremer, Christian W. Probst, Phillip Stanley-Marbell, Christian Steger, Vasanth Venkatachalam, and Manuel Wendt

Published in: Dagstuhl Seminar Proceedings, Volume 7041, Power-aware Computing Systems (2007)


Abstract
In the design and optimization of power-aware computing systems, it is often desired to estimate power consumption at various levels of abstraction, e.g., at the transistor, gate, RTL, behavioral or transaction levels. Tools for power estimation at these different levels of abstraction require specialized expertise, e.g., understanding of device physics for circuit-level power estimation, and as such are necessarily developed by different research communities. In the optimization of complete platforms however, it is desired to be able to obtain aggregate power and performance estimates for the different components of a system, and this requires the ability to model the system at a mixture of levels of abstraction. One approach to enabling such cross-abstraction modeling, is to define a mechanism for interchange of data between tools at different layers of abstraction, for both static analysis and simulation-based studies. This document presents preliminary discussions on the requirements of such an interface.

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Chris Bleakley, Tom Clerckx, Harald Devos, Matthias Grumer, Alex Janek, Ulrich Kremer, Christian W. Probst, Phillip Stanley-Marbell, Christian Steger, Vasanth Venkatachalam, and Manuel Wendt. 07041 Working Group – Towards Interfaces for Integrated Performance and Power Analysis and Simulation. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 7041, pp. 1-6, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2007)


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@InProceedings{bleakley_et_al:DagSemProc.07041.3,
  author =	{Bleakley, Chris and Clerckx, Tom and Devos, Harald and Grumer, Matthias and Janek, Alex and Kremer, Ulrich and Probst, Christian W. and Stanley-Marbell, Phillip and Steger, Christian and Venkatachalam, Vasanth and Wendt, Manuel},
  title =	{{07041 Working Group – Towards Interfaces for Integrated Performance and Power Analysis and Simulation}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--6},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2007},
  volume =	{7041},
  editor =	{Luca Benini and Naehyuck Chang and Ulrich Kremer and Christian W. Probst},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.07041.3},
  URN =		{urn:nbn:de:0030-drops-11072},
  doi =		{10.4230/DagSemProc.07041.3},
  annote =	{Keywords: Power Estimation Tools, Simulation, Tool Interfaces}
}
Document
05141 Abstracts Collection – Power-aware Computing Systems

Authors: Luca Benini, Ulrich Kremer, Christian W. Probst, and Peter Schelkens

Published in: Dagstuhl Seminar Proceedings, Volume 5141, Power-aware Computing Systems (2005)


Abstract
From 03.04.05 to 08.04.05, the Dagstuhl Seminar 05141 ``Power-aware Computing Systems'' was held in the International Conference and Research Center (IBFI), Schloss Dagstuhl. During the seminar, several participants presented their current research, and ongoing work and discussed open problems. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are collected in this paper. The first section describes the seminar topics and goals. Links to extended abstracts or full papers are provided, if available.

Cite as

Luca Benini, Ulrich Kremer, Christian W. Probst, and Peter Schelkens. 05141 Abstracts Collection – Power-aware Computing Systems. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 5141, pp. 1-14, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2005)


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@InProceedings{benini_et_al:DagSemProc.05141.1,
  author =	{Benini, Luca and Kremer, Ulrich and Probst, Christian W. and Schelkens, Peter},
  title =	{{05141 Abstracts Collection – Power-aware Computing Systems}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--14},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2005},
  volume =	{5141},
  editor =	{Luca Benini and Ulrich Kremer and Christian W. Probst and Peter Schelkens},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05141.1},
  URN =		{urn:nbn:de:0030-drops-3108},
  doi =		{10.4230/DagSemProc.05141.1},
  annote =	{Keywords: Energy dissipation, power reduction, measurement, management, performance}
}
Document
05141 Summary – Power-aware Computing Systems

Authors: Luca Benini, Ulrich Kremer, Christian W. Probst, and Peter Schelkens

Published in: Dagstuhl Seminar Proceedings, Volume 5141, Power-aware Computing Systems (2005)


Abstract
This paper summarizes the objectives and structure of a seminar with the same title, held from April 3rd to April 8th 2005 at Schloss Dagstuhl, Germany.

Cite as

Luca Benini, Ulrich Kremer, Christian W. Probst, and Peter Schelkens. 05141 Summary – Power-aware Computing Systems. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 5141, pp. 1-7, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2005)


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@InProceedings{benini_et_al:DagSemProc.05141.2,
  author =	{Benini, Luca and Kremer, Ulrich and Probst, Christian W. and Schelkens, Peter},
  title =	{{05141 Summary – Power-aware Computing Systems}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--7},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2005},
  volume =	{5141},
  editor =	{Luca Benini and Ulrich Kremer and Christian W. Probst and Peter Schelkens},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05141.2},
  URN =		{urn:nbn:de:0030-drops-3216},
  doi =		{10.4230/DagSemProc.05141.2},
  annote =	{Keywords: Power-aware architectures}
}
Document
Inter-program Optimizations for Disk Energy Reduction

Authors: Jerry Hom and Ulrich Kremer

Published in: Dagstuhl Seminar Proceedings, Volume 5141, Power-aware Computing Systems (2005)


Abstract
Compiler support for power and energy management has been shown to be effective in reducing overall power dissipation and energy consumption of programs, for instance through compiler-directed resource hibernation and dynamic frequency and voltage scaling. The multi-programming model with virtual memory presents a virtualized view of the machine such that compilers typically take single programs as input, without the knowledge of other programs that may run at the same time on the target machine. This work investigates the benefits of optimizing sets of programs with the goal of reducing overall disk energy. The two key ideas are to synchronize the disk accesses across a group of programs thereby allowing longer disk idle periods, and to utilize execution context knowledge to allocate maximal buffer sizes. The compiler inserts runtime system calls for profiling the application and disk, uses execution context in allocating buffers, and synchronizes disk accesses with an inverse barrier policy. Data prefetching has been added to mitigate the overhead of synchronization. Experimental results are based on three streaming applications and their subsets. The experiments show that inter-program optimizations can have significant disk energy savings over individually optimized programs. Applying the most aggressive inter-program optimizations result in energy savings of up to 49%, and saving 34% on average.

Cite as

Jerry Hom and Ulrich Kremer. Inter-program Optimizations for Disk Energy Reduction. In Power-aware Computing Systems. Dagstuhl Seminar Proceedings, Volume 5141, pp. 1-15, Schloss Dagstuhl - Leibniz-Zentrum für Informatik (2005)


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@InProceedings{hom_et_al:DagSemProc.05141.6,
  author =	{Hom, Jerry and Kremer, Ulrich},
  title =	{{Inter-program Optimizations for Disk Energy Reduction}},
  booktitle =	{Power-aware Computing Systems},
  pages =	{1--15},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2005},
  volume =	{5141},
  editor =	{Luca Benini and Ulrich Kremer and Christian W. Probst and Peter Schelkens},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05141.6},
  URN =		{urn:nbn:de:0030-drops-3086},
  doi =		{10.4230/DagSemProc.05141.6},
  annote =	{Keywords: Compiler, inter-program, optimization, execution context, synchronization, inverse barrier}
}
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