Download or read book Type specific Coherence Protocols for Distributed Shared Memory written by University of California, Santa Barbara. Computer Science Dept and published by . This book was released on 1992 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Distributed shared memory has received a [sic] considerable attention recently. It provides a unified memory framework for the development of parallel programs. As objects have been proved to be useful in databases and programming environments, the idea can be carried over to distributed operating systems. In this paper, the concept of a structured distributed shared memory, where memory units are objects, is introduced. The coherence of object replicas is maintained by type- specific coherence protocols, which are based on the semantics of operations on objects. The aim is to reduce message traffic and operation latency under many common situations. The new protocols subsume traditional distributed shared memory protocols based on the read/write model."

Download or read book A Primer on Memory Consistency and Cache Coherence written by Daniel Sorin and published by Morgan & Claypool Publishers. This book was released on 2011-03-02 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many modern computer systems and most multicore chips (chip multiprocessors) 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 highlevel concepts as well as specific, concrete examples from real-world systems. Table of Contents: Preface / Introduction to Consistency and Coherence / Coherence Basics / Memory Consistency Motivation and Sequential Consistency / Total Store Order and the x86 Memory Model / Relaxed Memory Consistency / Coherence Protocols / Snooping Coherence Protocols / Directory Coherence Protocols / Advanced Topics in Coherence / Author Biographies

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.

Download or read book Application specific Protocols for User level Shared Memory written by University of Wisconsin--Madison. Computer Sciences Dept and published by . This book was released on 1994 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Recent distributed shared memory (DSM) systems and proposed shared-memory machines have implemented some or all of their cache coherence protocols in software. One way to exploit the flexibility of this software is to tailor a coherence protocol to match an application's communication patterns and memory semantics. This paper presents evidence that this approach can lead to large performance improvements. It shows that application-specific protocols substantially improved the performance of three application programs -- appbt, em3d, and barnes -- over carefully tuned transparent shared memory implementations. The speed-ups were obtained on Blizzard, a fine-grained DSM system running on a 32-node Thinking Machines CM-5."

Download or read book Scalable Shared Memory Multiprocessors written by Michel Dubois and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop on Scalable Shared Memory Multiprocessors took place on May 26 and 27 1990 at the Stouffer Madison Hotel in Seattle, Washington as a prelude to the 1990 International Symposium on Computer Architecture. About 100 participants listened for two days to the presentations of 22 invited The motivation for this workshop was to speakers, from academia and industry. promote the free exchange of ideas among researchers working on shared-memory multiprocessor architectures. There was ample opportunity to argue with speakers, and certainly participants did not refrain a bit from doing so. Clearly, the problem of scalability in shared-memory multiprocessors is still a wide-open question. We were even unable to agree on a definition of "scalability". Authors had more than six months to prepare their manuscript, and therefore the papers included in this proceedings are refinements of the speakers' presentations, based on the criticisms received at the workshop. As a result, 17 authors contributed to these proceedings. We wish to thank them for their diligence and care. The contributions in these proceedings can be partitioned into four categories 1. Access Order and Synchronization 2. Performance 3. Cache Protocols and Architectures 4. Distributed Shared Memory Particular topics on which new ideas and results are presented in these proceedings include: efficient schemes for combining networks, formal specification of shared memory models, correctness of trace-driven simulations,synchronization, various coherence protocols, .

Download or read book Mechanisms for Distributed Shared Memory written by Steven K. Reinhardt and published by . This book was released on 1996 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Software Techniques for Customizable Distributed Shared Memory written by Satish Chandra and published by . This book was released on 1997 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Performance and Scalability of Distributed Shared Memory Cache Coherence Protocols written by Mark Andrew Heinrich and published by . This book was released on 1998 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multiple Cache Coherence Protocols for Distributed Shared Memory Multiprocessor Systems written by Pradeep Chordia and published by . This book was released on 2000 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distributed Shared Memory Multiprocessor System with Multiple Cache Coherence Protocols written by Kaleem Muhammad Sheriff and published by . This book was released on 2001 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Scalable New Cache Coherence Protocol for Hierarchical Distributed Shared Memory written by Phanindra K. Mannava and published by . This book was released on 1994 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Fault tolerant Coherence Protocol for Distributed Shared Memory Systems written by Pallavi K. Ramam and published by . This book was released on 1998 with total page 436 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 Experience with a Language for Writing Coherence Protocols written by Satish Chandra and published by . This book was released on 1997 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Munin written by John K. Bennett and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fault Tolerance and Scalability in DSM Coherence Protocols written by Sachin Kirit Shah and published by . This book was released on 1997 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Framework for Customizing Coherence Protocols of Distributed File Caches in Lucas File System written by Tōkyō Daigaku. Dept. of Information Science and published by . This book was released on 1994 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "In cooperative applications such as group CAD and group software development systems, multiple processes communicate with each other by sharing complex data consisting of nested structures and pointers. Although the sharing of complex data structures in the distributed environment is achieved through the technology of distributed shared memory, a single cache coherence protocol cannot efficiently serve various access patterns generated by cooperative applications. By having a framework for allowing cooperative applications to customize coherence protocols according to their behaviors, hence, significant improvement of run-time efficiency is expected. This paper describes a framework of protocol customization for the sharing of volatile and persistent data in cooperative applications. The major obstacle in user-level customization of protocols is that there are too many states and state transitions in an unabstracted protocol to enable average users to describe them. The protocol customization system (PCS) in this paper solves this problem by introducing high-level model for protocol description that abstracted away non-determinism of messages, synchronization among hosts, and local paging actions. Consequently, users can define with brief descriptions cache coherence protocols that are adapted for particular applications. The ability of PCS to describe different kinds of protocols is examined in this paper, and its run-time performance and memory usages are investigated."