A Cache Technique for Synchronization Variables in Highly Parallel, Shared Memory Systems PDF Download

Author: Courant Institute of Mathematical Sciences. Ultracomputer Research Laboratory
Publisher:
ISBN:
Category :
Languages : en
Pages : 0

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Author: Wayne Berke
Publisher: Andesite Press
ISBN: 9781297821325
Category :
Languages : en
Pages : 26

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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.

Author: Wayne Berke
Publisher: Forgotten Books
ISBN: 9780266784166
Category :
Languages : en
Pages : 32

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Excerpt from A Cache Technique for Synchronization Variables in Highly Parallel, Shared Memory Systems Caches have traditionally been used to lower the average latency of memory access. When paired with the individual cpus of a multiprocessor, they have the'additional benefit of reducing the overall load on the processor-memory interconnection. Since synchronization variables have been identified as centers of memory conten tion, we have looked at methods of utilizing the cache to minimize this effect. A technique of polling the cache is proposed to deal with this problem. Consistency within the caches is maintained with a bottleneck-free update facility that exploits the topology of the multistage network. Since an indiscriminate broadcast-ou-write policy can lead to severe network congestion at high levels of parallelism, we selec tively invoke these updates from the software. We illustrate our methods with a number of useful synchronization algorithms and present simulation results that sup port the feasibility of our design. In addition to providing support for basic syn chronization operations, our methodology is generally applicable to all parallel algo rithms that utilize polling. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Author: Michael L. Scott
Publisher: Springer Nature
ISBN: 3031017404
Category : Technology & Engineering
Languages : en
Pages : 206

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From driving, flying, and swimming, to digging for unknown objects in space exploration, autonomous robots take on varied shapes and sizes. In part, autonomous robots are designed to perform tasks that are too dirty, dull, or dangerous for humans. With nontrivial autonomy and volition, they may soon claim their own place in human society. These robots will be our allies as we strive for understanding our natural and man-made environments and build positive synergies around us. Although we may never perfect replication of biological capabilities in robots, we must harness the inevitable emergence of robots that synchronizes with our own capacities to live, learn, and grow. This book is a snapshot of motivations and methodologies for our collective attempts to transform our lives and enable us to cohabit with robots that work with and for us. It reviews and guides the reader to seminal and continual developments that are the foundations for successful paradigms. It attempts to demystify the abilities and limitations of robots. It is a progress report on the continuing work that will fuel future endeavors. Table of Contents: Part I: Preliminaries/Agency, Motion, and Anatomy/Behaviors / Architectures / Affect/Sensors / Manipulators/Part II: Mobility/Potential Fields/Roadmaps / Reactive Navigation / Multi-Robot Mapping: Brick and Mortar Strategy / Part III: State of the Art / Multi-Robotics Phenomena / Human-Robot Interaction / Fuzzy Control / Decision Theory and Game Theory / Part IV: On the Horizon / Applications: Macro and Micro Robots / References / Author Biography / Discussion

Author: Michael Lee Scott
Publisher: Springer Nature
ISBN: 3031386841
Category : Computer architecture
Languages : en
Pages : 252

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Zusammenfassung: This book offers a comprehensive survey of shared-memory synchronization, with an emphasis on "systems-level" issues. It includes sufficient coverage of architectural details to understand correctness and performance on modern multicore machines, and sufficient coverage of higher-level issues to understand how synchronization is embedded in modern programming languages. The primary intended audience for this book is "systems programmers"--the authors of operating systems, library packages, language run-time systems, concurrent data structures, and server and utility programs. Much of the discussion should also be of interest to application programmers who want to make good use of the synchronization mechanisms available to them, and to computer architects who want to understand the ramifications of their design decisions on systems-level code

Author: David B. Kirk
Publisher: Newnes
ISBN: 0123914183
Category : Computers
Languages : en
Pages : 519

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Programming Massively Parallel Processors: A Hands-on Approach, Second Edition, teaches students how to program massively parallel processors. It offers a detailed discussion of various techniques for constructing parallel programs. Case studies are used to demonstrate the development process, which begins with computational thinking and ends with effective and efficient parallel programs. This guide shows both student and professional alike the basic concepts of parallel programming and GPU architecture. Topics of performance, floating-point format, parallel patterns, and dynamic parallelism are covered in depth. This revised edition contains more parallel programming examples, commonly-used libraries such as Thrust, and explanations of the latest tools. It also provides new coverage of CUDA 5.0, improved performance, enhanced development tools, increased hardware support, and more; increased coverage of related technology, OpenCL and new material on algorithm patterns, GPU clusters, host programming, and data parallelism; and two new case studies (on MRI reconstruction and molecular visualization) that explore the latest applications of CUDA and GPUs for scientific research and high-performance computing. This book should be a valuable resource for advanced students, software engineers, programmers, and hardware engineers. - New coverage of CUDA 5.0, improved performance, enhanced development tools, increased hardware support, and more - Increased coverage of related technology, OpenCL and new material on algorithm patterns, GPU clusters, host programming, and data parallelism - Two new case studies (on MRI reconstruction and molecular visualization) explore the latest applications of CUDA and GPUs for scientific research and high-performance computing

Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 464

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Author: K. Zamanifar
Publisher:
ISBN:
Category : Cache memory
Languages : en
Pages : 16

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Abstract: "There is a growing acceptance that general purpose parallel computers need to be based on a scalable shared memory computational model, with the ability to exploit data locality for good performance. Today, this is commonly achieved by mapping the model onto a distributed memory computer with a scalable interconnect (supporting linear increases in bisection bandwidth). Example machines are the Cray T3D, IBM SP2 and Intel Paragon, which can scale in performance to 100's or 1000's of processors. This results in a two-level memory hierarchy, in which data is either local or shared across the machine. The next few years will see a trend in the move towards cache coherent multiprocessors, using the techniques employed by machines such as the KSR (cache-only memory) and the DASH (distributed directories). An example is the forthcoming Silicon Graphics cache coherent multiprocessor. This will simplify the programming model by presenting a single level memory hierarchy, consisting of a system-wide shared address space. Multiple copies of a shared variable are then automatically maintained in a coherent state by the machine. This paper describes a highly scalable caching technique, which is targeted at a specific form of shared memory model, called the WPRAM. Shared data is weakly coherent, in that a processor wishing to read newly written shared data must explicitly synchronise in some way with the writer of that data. The example provided supports coherency for barrier synchronisation operations, but can be extended to other forms. An example of the use of this method is shown through an implementation of the simplex method for linear programming. Results are based on a simulation of a scalable distributed memory machine. An analytical model is used to describe the performance of the algorithm and verify the simulation results."

Author: A. Agarwal
Publisher:
ISBN:
Category : Computer network architectures
Languages : en
Pages : 21

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Author: Hidehiko Tanaka
Publisher: IOS Press
ISBN:
Category : Computers
Languages : en
Pages : 258

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The work features the development of the fundamental technologies for massively parallel processing, covering research on the applications, the language, the operating system and the hardware architecture. Also the present status and future plans are addressed. The following topics are discussed in the section on applications: the MGCG Method; Parallelization of FEM; Modeling of Group Behaviors; Parallel Visualization; Functional Memory Type Parallel Processing; a Parallel Reduction Algorithm and Combination Algorithm. As for the programming languages, the SIMD-Based Language NCX, the Dataflow-based Language V and the Parallel Object-Oriented Language A-NETL are discussed. In the chapter on operating systems, the subjects Design Philosophy and Objectives; COS Software Architecture and Elements of the Operating System are - amongst others - addressed. Finally, the part on hardware architecture covers an Overview of the JUMP-1 System; Memory Architecture; Network Architecture; I/O Architecture and Implementation Issues. Massively parallel processing is expected to play a crucial role in the development of almost all advanced technologies for the 21st century. This book is intended to serve a large variety of researchers in the area of parallel computing.