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IEEE International Conference on Microelectronic systems Education

作者： P.R. Schulz U. Bruning G. Strube Computer Architecture Group University of Mannheim Mannheim Germany VCAD Services Cadence Design Systems GmbH Feldkirchen Germany

This paper summarizes the content and application of the SEED2002 project. SEED2002 is a university/industry collaboration to enhance and reform the education in the field of semi-custom/full-custom ASIC design at the universities of Mannheim, Heidelberg and Kaiserslautern, Germany. With this project Cadence Design systems enables us to teach leading-edge ASIC design using their most innovative products.

关键词： Application specific integrated circuits Electronic design automation and methodology computer science education Hardware design languages Industrial relations Maintenance engineering Reliability engineering Design engineering computer architecture Application software

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Towards detection of coarse-grain loop-level parallelism in irregular computations 8th

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8th International Euro-Par Conference on Parallel Processing

作者： Arenaz, M Touriño, J Doallo, R Computer Architecture Group Department of Electronics and Systems University of A Coruña Spain

ISBN: (纸本)3540440496

This paper presents a new algorithm for the detection of coarse-grain parallelism in loops with complex irregular computations. Loops are represented as directed acyclic graphs whose nodes are the strongly connected components (SCC) that appear in the Gated Single Assignment (GSA) program form, and whose edges are the use-def chains between pairs of SCCs. Loops that can be executed in parallel using run-time support are recognized at compile-time by performing a demand-driven analysis of the corresponding SCC graphs.. A prototype was implemented using the infrastructure provided by the Polaris parallelizing compiler. Encouraging experimental results for a suite of real irregular programs are shown.

关键词： Directed graphs

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A cluster-based solution for a high performance air quality simulation 6th

A cluster-based solution for a high performance air quality ...

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6th International Conference on Applied Parallel Computing, PARA 2002

作者： Mourĩno, José Carlos González, Patricia Martín, María J. Doallo, Ramón Computer Architecture Group Department of Electronics and Systems University of A Corũna Spain

ISBN: (纸本)354043786X

Parallel computingon networks of workstations or PCs has been gaining popularity in recent years due to their competitive costprice compared to supercomputers. In this paper we provide a clusterbased solution for a high performance air quality model, the STEM-II program. The application has been parallelized using standard MPI library on a cluster of PCs. Performance results are shown in this paper. We also compare these results with those ones obtained on a multicomputer. Speedup and scalability, as well as the ratio communication/ computation cost, on both systems, are evaluated. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Supercomputers

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Speeding up target address generation using a self-indexed FTB 8th

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8th International Euro-Par Conference on Parallel Processing, Euro-Par 2002

作者： Moure, Juan C. Rexachs, Dolores I. Luque, Emilio Computer Architecture and Operating Systems Group Universidad Autónoma de Barcelona Barcelona08193 Spain

ISBN: (纸本)3540440496

The fetch target buffer (FTB) holds information on basic blocks to predict taken branches in the fetch stream and also their target addresses. We propose a variation to FTB, the self-indexed FTB, which, through an extra level of indirection, provides the high hit rate of a relatively large, high-associative FTB with the fast access delay of a small, direct-mapped FTB. The critical and most frequent operation –predicting the next FTB entry– is speeded up, whilst less frequent operations –such as recovering from FTB misses– are slightly slowed down. The new design is both analyzed and simulated. Performance increase on a 512-entry FTB is estimated at between 15% and 30%. © Springer-Verlag Berlin Heidelberg 2002.

关键词： computers

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Irregular assignment computations on cc-NUMA multiprocessors

Irregular assignment computations on cc-NUMA multiprocessors

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4th International Symposium on High Performance Computing, ISHPC 2002

作者： Arenaz, Manuel Tourino, Juan Doallo, Ramon Computer Architecture Group Department of Electronics and Systems University of A Coruña Campus de Elviña s/n A Coruña15071 Spain

ISBN: (纸本)354043674X

This paper addresses the parallelization of loops with irregular assignment computations on cc-NUMA multiprocessors. This loop pattern is distinguished by the existence of loop-carried output data dependences that can only be detected at run-time. A parallelization technique based on the inspector-executor model is proposed in this paper. In the inspector, loop iterations are reordered so that they can be executed in a conflict-free manner during the executor stage. The design of the inspector ensures load-balancing and uniprocessor data write locality exploitation. Experimental results show the scalability of this technique, which is presented as a clear alternative to other existing methods. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Multiprocessing systems

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Human systems integration and advanced technology in engineering department workload and manpower reduction

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NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central Control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

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A new end-to-end authentication protocol for mobile users to access internet services 17th

A new end-to-end authentication protocol for mobile users to...

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17th International Conference on Information Security, SEC 2002

作者： He, Li-Sha Zhang, Ning He, Li-Rong Mobile Architecture Systems Group Department of Computer Science University of Manchester M13 9PL United Kingdom

ISBN: (纸本)9781475710267

When a mobile user using wireless devices tries to access to a Service Provider (SP) connected to wire-lined network such as the Internet, security risks experienced by SP as well as the wireless and wire-lined network providers are greater. The mobility and resource-limited nature exhibited by the wireless devices only make the security provision in such a context ever challenging. This paper attempts to set a step forward toward finding an asymmetrical approach to the provision of security to mobile users by re-examining the issue of end-to-end authentication. Having first examined the special security and performance requirements in this application context, the paper surveys the related work in the subject area, and then presents a new network-assisted endtoend authentication and key exchange protocol suited to mobile users in their access to Internet services. © IFIP International Federation for Information Processing 2002.

关键词： Authentication

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High performance air pollution simulation using OpenMP

High performance air pollution simulation using OpenMP

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International Conference on Parallel Processing Workshops (ICPPW)

作者： M. Parada M.J. Martin R. Doallo Computer Architecture Group Department of Electronics and Systems University of A Coruña Coruna Spain

The aim of the work is to provide a high performance air quality simulation using the STEM-II (Sulphur Transport Eulerian Model 2) program. First of all we optimize the sequential program with the aim of increasing data locality. Then, the optimized program is parallelized using OpenMP shared-memory directives. Experimental results on a 32-processor SGI Origin 2000 show that the parallel program achieves important reductions in the execution times.

关键词： Air pollution Chemistry Chemical processes Computational modeling computer architecture Meteorology Predictive models Power generation Libraries Power system modeling

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Improving single-thread fetch performance on a multithreaded processor

Improving single-thread fetch performance on a multithreaded...

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Euromicro Symposium on Digital System Design

作者： J.C. Moure R.B. Garcia D.I. Rexachs E. Luque Computer Architecture and Operating Systems Group Universidad Autónoma de Barcelona Barcelona Spain

Multithreaded processors, by simultaneously using both the thread-level parallelism and the instruction-level parallelism of applications, achieve larger instruction per cycle rate than single-thread processors. On a multi-thread workload, a clustered organization maximizes performances. On a single-thread workload, however, all but one of the clusters are idle, degrading single-thread performance significantly. Using a clustered multi-thread performance as a baseline, we propose and analyze several mechanisms and policies to improve single-thread execution exploiting the existing hardware without a significant multi-thread performance loss. We focus on the fetch unit, which is maybe the most performance-critical stage. Essentially, we analyze three ways of exploiting the idle fetch clusters: allowing a single thread accessing its neighbor clusters, use the idle fetch clusters to provide multiple-path execution, or use them to widen the effective single-three fetch block.

关键词： Yarn Parallel processing Performance analysis Performance loss Bandwidth Degradation Surface-mount technology computer architecture Operating systems Application software

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IDEA - An information superstructure 2

IDEA - An information superstructure

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2nd DARPA Information Survivability Conference and Exposition (DISCEX II)

作者： Tallet, JO Henning, RR Fox, KL IDEA Project United States Harris' Software Architecture Tools Methods and Technology Team United States Harris Corporation's Government Communications Systems Division United States Information Assurance Center of Excellence United States Harris Engineering Process Group United States IEEE IEEE Computer Society United States

ISBN: (纸本)0769512127

This past October, the Associated Press reported that for over a month hackers effectively penetrated Microsoft's firewall and, potentially, had access to source code for future products. Over the past year, reported commercial espionage has been increasing steadily. These events underscore the necessary for security engineers to define and implement strong information assurance infrastructures. The concept of defense in depth is used to provide sufficient detection and defensive countermeasures to ensure an enterprise's information is protected. Over the past three years, Harris has conducted research leading to the development of an assurance superstructure tool: the Integrated Design Environment for Assurance (IDEA). Building upon concepts developed during the Network Vulnerability Tool (NVT) program, the IDEA program refined the design and provides a comprehensive assurance analysis superstructure. The IDEA program benifited from the NVT architecture to gain greater adaptive capabilities to address the evolving capabilities of external vulnerability assessment and risk management tools. This re-architected solution builds upon lessons learned during the NVT project.

关键词： architecture patterns FuzzyFusion(Tm) data fusion fuzzy information operations information security

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