Download or read book Eliminating Useless Messages in Write update Protocols on Scalable Multiprocessors written by University of Rochester. Dept. of Computer Science and published by . This book was released on 1994 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Cache coherence protocols for shared-memory multiprocessors use invalidations or updates to maintain coherence across processors. Although invalidation protocols usually produce higher miss rates, update protocols typically perform worse. Detailed simulations of these two classes of protocol show that the excessive network traffic caused by update protocols significantly degrades performance, even with infinite bandwidth. Motivated by this observation, we categorize the coherence traffic in update-based protocols and show that, for most applications, more than 90% of all updates generated by the protocol are unnecessary. We identify application characteristics that generate useless update traffic, and compare the isolated and combined effects of several software and hardware techniques for eliminating useless updates. These techniques include dynamic and static hybrid protocols, false sharing elimination strategies, and coalescing write buffers. Our simulations show that software caching (where coherence is managed under programmer or compiler control) and the dynamic hybrid protocol reduce useless updates the most, but coalescing write buffers produce fewer, albeit larger, coherence messages. As a result, coalescing write buffers usually produce the best running time, except when the block size is large or the bandwidth is limited. Finally, based on the observation that the techniques we consider are unable to eliminate a large number of useless updates, we suggest directions for further reducing the useless traffic in update-based protocols."
Download or read book Eliminating Useless Messages in Write update Protocols on Scalable Multiprocessors written by University of Rochester. Department of Computer Science and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Cache coherence protocols for shared-memory multiprocessors use invalidations or updates to maintain coherence across processors. Although invalidation protocols usually produce higher miss rates, update protocols typically perform worse. Detailed simulations of these two classes of protocol show that the excessive network traffic caused by update protocols significantly degrades performance, even with infinite bandwidth. Motivated by this observation, we categorize the coherence traffic in update-based protocols and show that, for most applications, more than 90% of all updates generated by the protocol are unnecessary. We identify application characteristics that generate useless update traffic, and compare the isolated and combined effects of several software and hardware techniques for eliminating useless updates. These techniques include dynamic and static hybrid protocols, false sharing elimination strategies, and coalescing write buffers. Our simulations show that software caching (where coherence is managed under programmer or compiler control) and the dynamic hybrid protocol reduce useless updates the most, but coalescing write buffers produce fewer, albeit larger, coherence messages. As a result, coalescing write buffers usually produce the best running time, except when the block size is large or the bandwidth is limited. Finally, based on the observation that the techniques we consider are unable to eliminate a large number of useless updates, we suggest directions for further reducing the useless traffic in update-based protocols."
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of 1996 IEEE Second International Conference on Algorithms Architectures for Parallel Processing ICA3PP 96 written by IEEE Singapore Section and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1996 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower costs and higher degrees of integration in chip architecture that allow parallel processing are described. The impact on parallel processing algorithms is examined with offerred solutions. Advantages of parallel processing for large computational problems are examined.
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1995 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cache Memory Design and Performance Issues in Shared memory Multiprocessors written by Farnaz Mounes-Toussi and published by . This book was released on 1995 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Third International Symposium on High Performance Computer Architecture written by and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1997 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Languages Compilers and Run Time Systems for Scalable Computers written by Sandhya Dwarkadas and published by Springer Science & Business Media. This book was released on 2000-10-04 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the strictly refereed post-workshop proceedings of the 5th International Workshop on Languages, Compilers, and Run-Time Systems for Scalable Computing, LCR 2000, held in Rochester, NY, USA in May 2000. The 22 revised full papers presented were carefully reviewed and selected from 38 submissions. The papers are organized in topical sections on data-intensive computing, static analysis, openMP support, synchronization, software DSM, heterogeneous/-meta-computing, issues of load, and compiler-supported parallelism.
Download or read book Proceedings of the 1996 International Conference on Parallel Processing August 12 16 1996 written by and published by . This book was released on 1996 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Primer on Memory Consistency and Cache Coherence written by Vijay Nagarajan and published by Morgan & Claypool Publishers. This book was released on 2020-02-04 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many modern computer systems, including homogeneous and heterogeneous architectures, support shared memory in hardware. In a shared memory system, each of the processor cores may read and write to a single shared address space. For a shared memory machine, the memory consistency model defines the architecturally visible behavior of its memory system. Consistency definitions provide rules about loads and stores (or memory reads and writes) and how they act upon memory. As part of supporting a memory consistency model, many machines also provide cache coherence protocols that ensure that multiple cached copies of data are kept up-to-date. The goal of this primer is to provide readers with a basic understanding of consistency and coherence. This understanding includes both the issues that must be solved as well as a variety of solutions. We present both high-level concepts as well as specific, concrete examples from real-world systems. This second edition reflects a decade of advancements since the first edition and includes, among other more modest changes, two new chapters: one on consistency and coherence for non-CPU accelerators (with a focus on GPUs) and one that points to formal work and tools on consistency and coherence.
Download or read book The Art of Multiprocessor Programming Revised Reprint written by Maurice Herlihy and published by Elsevier. This book was released on 2012-06-25 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt: Revised and updated with improvements conceived in parallel programming courses, The Art of Multiprocessor Programming is an authoritative guide to multicore programming. It introduces a higher level set of software development skills than that needed for efficient single-core programming. This book provides comprehensive coverage of the new principles, algorithms, and tools necessary for effective multiprocessor programming. Students and professionals alike will benefit from thorough coverage of key multiprocessor programming issues. This revised edition incorporates much-demanded updates throughout the book, based on feedback and corrections reported from classrooms since 2008 Learn the fundamentals of programming multiple threads accessing shared memory Explore mainstream concurrent data structures and the key elements of their design, as well as synchronization techniques from simple locks to transactional memory systems Visit the companion site and download source code, example Java programs, and materials to support and enhance the learning experience
Download or read book Proceedings International Conference on Computer and Information Technology December 28 29 2001 written by and published by . This book was released on 2001 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed papers presented on the fourth year of the ongoing Conference.
Download or read book System Architecture and Integration written by Euromicro. Conference and published by Institute of Electrical & Electronics Engineers(IEEE). This book was released on 1994 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Euromicro 94 has the theme "System Architecture and Integration." The proceedings contain two keynote speeches (The Design of Fault-Tolerant Real-Time Systems by H. Kopetz, and "A Theory of Engineering Design" by C.A.R. Hoare) and 87 technical papers in sessions including design and optimization, database retrieval techniques, mapping to parallel systems, VLSI high-level synthesis, object-oriented techniques, VLSI testing and testability, special architectures, protocols, tools for VLSI design, specification and design, dedicated devices, expert and knowledge-based systems, parallel architectures, application of mathematical models, using distributed systems, neural nets, FSM synthesis, and fault tolerance in parallel systems. No index. Annotation copyright by Book News, Inc., Portland, OR.
Download or read book Computer Organization written by V. Carl Hamacher and published by McGraw-Hill Science, Engineering & Mathematics. This book was released on 1996 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text is intended to be of use for first courses in computer architecture taught in computer science and electrical/computing engineering departments. The fourth edition places more emphasis on design, and covers topics such as RISC processors, performance analysis and memory systems.
Download or read book Scalable Shared Memory Multiprocessors written by Michel Dubois and published by Springer Science & Business Media. This book was released on 1992 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematics of Computing -- Parallelism.
Download or read book Distributed Shared Memory written by Jelica Protic and published by John Wiley & Sons. This book was released on 1997-08-10 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The papers present in this text survey both distributed shared memory (DSM) efforts and commercial DSM systems. The book discusses relevant issues that make the concept of DSM one of the most attractive approaches for building large-scale, high-performance multiprocessor systems. The authors provide a general introduction to the DSM field as well as a broad survey of the basic DSM concepts, mechanisms, design issues, and systems. The book concentrates on basic DSM algorithms, their enhancements, and their performance evaluation. In addition, it details implementations that employ DSM solutions at the software and the hardware level. This guide is a research and development reference that provides state-of-the art information that will be useful to architects, designers, and programmers of DSM systems.
