Download or read book Virtual Shared Memory for Distributed Architectures written by Eva Kühn and published by Nova Publishers. This book was released on 2001 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Virtual Shared Memory for Distributed Architecture

Download or read book Shared Memory on Distributed Architectures SODA written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Aims to develop a distributed virtual shared memory (DVSM) environment for a network of UNIX-based workstations and the CS-2. Reveals that the Shared Memory on Distributed Architectures (SODA) project is led by Meiko Scientific together with Telmat, SICS, GMD and ONERA. The shared memory programming model can be used for direct application porting and as a target for parallelizing compilers.

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 The Architecture of the Oasis Mobile Shared Virtual Memory System written by William Harold Schroeder and published by . This book was released on 1996 with total page 380 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 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 An Implementation of Distributed Shared Memory written by Umakishore Ramachandran and published by . This book was released on 1988 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shared Memory Architecture for Distributed Computing written by Arvin Park and published by . This book was released on 1987 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book SOFTWARE SHARED VIRTUAL MEMORY written by Chit-Ho Dominic Hung and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "A Software Shared Virtual Memory System With Three Way Coherence Protocols on the Intel Single-chip Cloud Computer" by Chit-ho, Dominic, Hung, 熊哲皓, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: With the advancement of design and fabrication of high-performance integrated circuits technology, it is foreseeable that processors with more than 1,000 cores per die will appear in the near future. However, these many-core architectures have introduced a lot of challenges at the memory system level, such as complicated cache coherence and limited memory access speed, to name a few. This thesis focuses on one prominent many-core prototype - the Intel's Single-chip Cloud Computer (SCC). The SCC architecture does not provide hardware cache coherency. Instead, it relies on on-chip programmable memory. The baseline coherence protocol for the SCC is the Software Managed Coherence (SMC) layer. To achieve memory consistency, it accesses shared memory without part of the typical cache hierarchy for efficient invalidation and flushing. We found that performance provided by this coherence layer in this manner is sub-optimal because accesses of shared memory would all turn into data update messages within the network mesh. As cache locality could not be exploited to its full potential, the execution pipelines stall much often for memory fetches from outside the chip. This research is to address the performance problem of shared virtual memory consistency for this cache in-coherent architecture. Oriented at sitting data on-chip as much as possible to reduce memory accesses external to the chip, we propose two techniques to leverage the cache hierarchy to full and reside data in the on-chip scratchpad memory. First, targeted at the architectural specificity of the hardware, we redesigned traditional software distributed shared memory (SDSM) to allow shared data be treated transparently like private memory so the cache hierarchy can be fully utilised without sacrificing memory consistency. Second, we propose a distance-aware page allocation scheme that samples access frequencies and select the most frequently-recently used pages to be stored on the on-chip scratchpad memory. Our experimental results show that our first technique, the ordinary SDSM outperforms the current SMC approach by 5 times. Moreover, in some cases, with the second technique that is based on scratchpad memory, our proposed system outperforms further by an additional 1.57 times. Our experiments also demonstrated that the SMC approach is not scalable due to congestion of the network mesh by coherence traffic generated while the two new approaches continued to scale well. The main contribution of this research is the implementation of a cache coherence software library system built for an architecture that comes with non-coherent cache hardware and just relies on software-defined cache. This new cache hierarchy has evidently opened the door for smarter and faster inter-processor-core data sharing without the need of complicated cache coherence hardware. Subjects: Distributed shared memory Cloud computing

Download or read book Architectural and Operating System Support for Virtual Memory written by Abhishek Bhattacharjee and published by Springer Nature. This book was released on 2022-05-31 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides computer engineers, academic researchers, new graduate students, and seasoned practitioners an end-to-end overview of virtual memory. We begin with a recap of foundational concepts and discuss not only state-of-the-art virtual memory hardware and software support available today, but also emerging research trends in this space. The span of topics covers processor microarchitecture, memory systems, operating system design, and memory allocation. We show how efficient virtual memory implementations hinge on careful hardware and software cooperation, and we discuss new research directions aimed at addressing emerging problems in this space. Virtual memory is a classic computer science abstraction and one of the pillars of the computing revolution. It has long enabled hardware flexibility, software portability, and overall better security, to name just a few of its powerful benefits. Nearly all user-level programs today take for granted that they will have been freed from the burden of physical memory management by the hardware, the operating system, device drivers, and system libraries. However, despite its ubiquity in systems ranging from warehouse-scale datacenters to embedded Internet of Things (IoT) devices, the overheads of virtual memory are becoming a critical performance bottleneck today. Virtual memory architectures designed for individual CPUs or even individual cores are in many cases struggling to scale up and scale out to today's systems which now increasingly include exotic hardware accelerators (such as GPUs, FPGAs, or DSPs) and emerging memory technologies (such as non-volatile memory), and which run increasingly intensive workloads (such as virtualized and/or "big data" applications). As such, many of the fundamental abstractions and implementation approaches for virtual memory are being augmented, extended, or entirely rebuilt in order to ensure that virtual memory remains viable and performant in the years to come.

Download or read book Restructuring Virtual Memory to Support Distributed Computing Environments written by Feng Huang and published by . This book was released on 1995 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "This dissertation considers the limitations of conventional memory and storage management approaches and proposes a coherent memory-mapped object system architecture for emerging distributed computing environments. Conventionally, main memory and secondary storage management is based on the two-level store architecture, which provides one interface to access memory segments and another to access secondary storage objects. The quality and productivity of software development is impaired by two different views of volatile data and persistent data. Operating system performance is compromised because of mandatory data copying and unnecessary user/kernel boundary crossings. This is exacerbated in microkernel architectures, in which most of the user/kernel boundary crossings become context switches. Double paging may cause resources to be used inefficiently and the double paging anomaly may occur if a data base system is implemented on top of this architecture. The work presented here seeks to tackle these problems by integrating main memory with secondary storage using memory-mapping techniques. The different views of volatile and persistent data are unified; mandatory information copying and unnecessary user/kernel boundary crossings (or context switches in microkernels) are avoided; and double paging is also eliminated. Distributed shared memory (DSM) has been proposed as an attractive abstraction for constructing distributed applications because it is easier to program than the message-passing abstraction. However, the overhead for maintaining memory coherency in DSM systems is high. Also, existing DSM systems typically provide only one coherence protocol and there exists a potential mismatch between the supplied protocol and some applications' requirements. This work explores the architectural support for a flexible coherence mechanism, through which clients can choose the most suitable protocols for their applications to avoid coherency mismatch. Also low-level coherency control is integrated with high-level concurrency control so that system-wide object coherency and synchronisation are realised without sacrificing performance. In this dissertation, an architectural framework is proposed; various design issues are discussed and the design of a flexible coherence mechanism, which accommodates multiple coherence protocols, is detailed. A prototype implementation and performance measurements are then presented; and the use of the architecture is illutstrated."

Download or read book A Parallel Virtual Shared Memory Implementation of the Architecture independent Programming Language UNITY written by Ki-Sung Chung and published by . This book was released on 1995 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distributed Memory Computing written by Arndt Bode and published by Springer. This book was released on 1991 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume presents the proceedings of a conference covering European activities in the field of distributed memory computing architectures, programming tools, operating systems, programming languages and applications. New architectures discussed within the framework of several ESPRIT projects are covered as well as the application of a number of European and non-European commercial multiprocessor systems. Research on different interconnection topologies including mesh and hypercubes and on virtual shared memory systems is presented. One of the main topics of the book is tools for programming such architectures (debuggers, performance analysers, visualizers, load balancers, mappers) with the goal of enhancing the productivity of the programmer. Alternative execution models such as systolic arrays and dataflow processors are also addressed."--PUBLISHER'S WEBSITE.

Download or read book Emulation of a Virtual Shared Memory Architecture written by Sanjay Raina and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shared Memory Multiprocessing written by Norihisa Suzuki and published by MIT Press. This book was released on 1992 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shared memory multiprocessors are becoming the dominant architecture for small-scale parallel computation. This book is the first to provide a coherent review of current research in shared memory multiprocessing in the United States and Japan. It focuses particularly on scalable architecture that will be able to support hundreds of microprocessors as well as on efficient and economical ways of connecting these fast microprocessors. The 20 contributions are divided into sections covering the experience to date with multiprocessors, cache coherency, software systems, and examples of scalable shared memory multiprocessors.

Download or read book On the Integration Distributed Shared Memory with Virtual Memory Management written by R. Ananthanarayanan and published by . This book was released on 1991 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tapestry written by Roy Harold Campbell and published by . This book was released on 1988 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: