Download or read book An Evaluation of Directory Protocols for Medium scale Shared memory Multiprocessors written by University of Wisconsin--Madison. Computer Sciences Dept and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This paper considers alternative directory protocols for providing cache coherence in shared-memory multiprocessors with 32 to 128 processors, where the state requirements of Dir[subscript N] may be considered too large. We consider Dir[subscript i]B, i = 1,2,4, Dir[subscript N], Tristate (also called superset), Coarse Vector, and three new protocols. The new protocols -- Gray-hardware, Gray-software, Home -- are optimizations of Tristate that use gray coding to favor near-neighbor sharing. Our results are the first to compare all these protocols with complete applications (and the first evaluation of Tristate with a non- synthetic workload). Results for three applications -- ocean (one dimensional sharing), appbt (three-dimensional sharing), and barnes (dynamic sharing) -- for 128 processors on the Wisconsin Wind Tunnel show that (a) Dir1B sends 15 to 43 times as many invalidation messages as Dir[subscript N], (b) Gray-software sends 1.0 to 4.7 times as many messages as Dir[subscript N], making it better than Tristate, Gray- Hardware, and Home, and (c) the choice between Dir[subscript i]B, Coarse Vector, and Gray-software depends on whether one wants to optimize for few sharers (Dir[subscript i]B), many sharers (Coarse Vector), or hedge one's bets between both alternatives (Gray-software)."
Download or read book A Hybrid Directory based Cache Coherence Protocol for Large scale Shared memory Multiprocessors and Its Performance Evaluation written by Kwo-Yuan Shieh and published by . This book was released on 1999 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Directory Based Cache Coherency Protocols for Shared Memory Multiprocessors written by Craig Warner and published by . This book was released on 1990 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some alternative directory entry formats are described, including a special entry format for implementing queueing semaphores. Evaluation of the various entry formats is done with probabilistic models of shared cache blocks and software simulation. A variable length global table organization is presented which can be used to reduce the size of the global table, regardless of the entry format. Its performance is analyzed using software simulation. A protocol which maintains a linked list of processors which have a particular block cached is presented. Several variations of this protocol induce less interconnection network traffic than traditional protocols."
Download or read book Euro Par 2005 Parallel Processing written by José C. Cunha and published by Springer Science & Business Media. This book was released on 2005-08-18 with total page 1311 pages. Available in PDF, EPUB and Kindle. Book excerpt: Euro-Par 2005 was the eleventh conference in the Euro-Par series. It was organized by the Centre for Informatics and Information Technology (CITI) and the Department of Informatics of the Faculty of Science and Technology of Universidade Nova de Lisboa, at the Campus of Monte de Caparica.
Download or read book Implementing a Directory based Cache Consistency Protocol written by Stanford University. Computer Systems Laboratory and published by . This book was released on 1990 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Directory-based cache consistency protocols have the potential to allow shared-memory multiprocessors to scale to a large number of processors. While many variations of these coherence schemes exist in the literature, they have typically been described at a rather high level, making adequate evaluation difficult. This paper explores the implementation issues of directory-based coherency strategies by developing a design at the level of detail needed to write a memory system functional simulator with an accurate timing model. The paper presents the design of both an invalidation coherency protocol and the associated directory/memory hardware. Support is added to prevent deadlock, handle subtle consistency situations, and implement a proper programming model of multiprocess execution. Extensions are delineated for realizing a multiple-threaded directory that can continue to process commands while waiting for a reply from a cache. The final hardware design is evaluated in the context of the number of parts required for implementation.
Download or read book The Cache Coherence Problem in Shared Memory Multiprocessors written by Igor Tartalja and published by Wiley-IEEE Computer Society Press. This book was released on 1996-02-13 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book illustrates state-of-the-art software solutions for cache coherence maintenance in shared-memory multiprocessors. It begins with a brief overview of the cache coherence problem and introduces software solutions to the problem. The text defines and details static and dynamic software schemes, techniques for modeling performance evaluation mechanisms, and performance evaluation studies.
Download or read book Computer Sciences Technical Report written by and published by . This book was released on 1995 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book HPCA written by and published by IEEE Computer Society Press. This book was released on 2001 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Topics covered in this text include: microarchitecture; memory architectures; multiprocessor systems; code generation techniques; energy and thermal management; prediction techniques; application-specific designs; performance modelling and analysis; and latency tolerance techniques.
Download or read book Architecture of Computing Systems ARCS 2017 written by Jens Knoop and published by Springer. This book was released on 2017-03-02 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the 30th International Conference on Architecture of Computing Systems, ARCS 2017, held in Vienna, Austria, in April 2017. The 19 full papers presented in this volume were carefully reviewed and selected from 42 submissions. They were organized in topical sections entitled: resilience; accelerators; performance; memory systems; parallelism and many-core; scheduling; power/energy.
Download or read book Parallel and Distributed Computing written by Alberto Ros and published by BoD – Books on Demand. This book was released on 2010-01-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 14 chapters presented in this book cover a wide variety of representative works ranging from hardware design to application development. Particularly, the topics that are addressed are programmable and reconfigurable devices and systems, dependability of GPUs (General Purpose Units), network topologies, cache coherence protocols, resource allocation, scheduling algorithms, peertopeer networks, largescale network simulation, and parallel routines and algorithms. In this way, the articles included in this book constitute an excellent reference for engineers and researchers who have particular interests in each of these topics in parallel and distributed computing.
Download or read book Conference Proceedings written by and published by . This book was released on 1994 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification and Optimization of Sharing Patterns for Scalable Shared memory Multiprocessors written by Stefanos Kaxiras and published by . This book was released on 1998 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Science Theory and Applications written by Dima Grigoriev and published by Springer. This book was released on 2006-04-27 with total page 697 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the refereed proceedings of the First International Symposium on Computer Science in Russia, CSR 2006. The 35 revised full theory papers and 29 revised application papers together with 3 invited talks address all major areas in computer science are addressed. The theory track deals with algorithms, protocols, data structures and more. The application part comprises programming and languages; computer architecture and hardware design among many more topics.
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 Electrical Electronics Abstracts written by and published by . This book was released on 1995 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 A Quantitative Performance Evaluation of SCI Memory Hierarchies written by Roberto A. Hexsel and published by . This book was released on 1994 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The simplest topology supported by SCI is the ring. It was found that, for the hardware and software simulated, the largest efficient ring size is between eight and sixteen nodes and that raw network bandwidth seen by processing elements is limited at about 80Mbytes/s. This is because the network saturates when link traffic reaches 600- 7000Mbytes/s. These levels of link traffic only occur for two poorly designed programs. The other four programs generate low traffic and their execution speed is not limited by interconnect nor cache coherence protocol. An analytical model of the multiprocessor is used to assess the cost of some frequently occurring cache coherence protocol operations. In order to build large systems, networks more sophisticated than rings must be used. The performance of SCI meshes and cubes is evaluated for systems of up to 64 nodes. As with rings, processor throughput is also limited by link traffic for the same two poorly designed programs
