Download or read book Transactional Distributed Shared Memory written by and published by . This book was released on 1992 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: "Atomic transactions have proven to be an important technique for constructing reliable applications. Traditionally, transactions have been extended to distributed environments through the use of function shipping, a technique in which message passing or remote procedure calls are used to invoke computational requests on remote nodes. Recently, the data sharing approach to constructing distributed applications has received attention in the form of distributed file systems and distributed shared virtual memory. Applying the data sharing approach to transactions produces transactional distributed shared memory (TDSM) which yields benefits for a certain class of distributed application

Download or read book Principles of Transactional Memory written by Rachid Guerraoui and published by Morgan & Claypool Publishers. This book was released on 2010 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transactional memory (TM) is an appealing paradigm for concurrent programming on shared memory architectures. With a TM, threads of an application communicate, and synchronize their actions, via in-memory transactions. Transactions are atomic: programmers get the illusion that every transaction executes all its operations instantaneously, at some single and unique point in time. The aim of this book is to provide theoretical foundations for transactional memory.

Download or read book Principles of Transactional Memory written by Rachid Guerraoui and published by Springer Nature. This book was released on 2022-06-01 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transactional memory (TM) is an appealing paradigm for concurrent programming on shared memory architectures. With a TM, threads of an application communicate, and synchronize their actions, via in-memory transactions. Each transaction can perform any number of operations on shared data, and then either commit or abort. When the transaction commits, the effects of all its operations become immediately visible to other transactions; when it aborts, however, those effects are entirely discarded. Transactions are atomic: programmers get the illusion that every transaction executes all its operations instantaneously, at some single and unique point in time. Yet, a TM runs transactions concurrently to leverage the parallelism offered by modern processors. The aim of this book is to provide theoretical foundations for transactional memory. This includes defining a model of a TM, as well as answering precisely when a TM implementation is correct, what kind of properties it can ensure, what are the power and limitations of a TM, and what inherent trade-offs are involved in designing a TM algorithm. While the focus of this book is on the fundamental principles, its goal is to capture the common intuition behind the semantics of TMs and the properties of existing TM implementations. Table of Contents: Introduction / Shared Memory Systems / Transactional Memory: A Primer / TM Correctness Issues / Implementing a TM / Further Reading / Opacity / Proving Opacity: An Example / Opacity vs.\ Atomicity / Further Reading / The Liveness of a TM / Lock-Based TMs / Obstruction-Free TMs / General Liveness of TMs / Further Reading / Conclusions

Download or read book Fault tolerant transactions using distributed shared memory written by Ajay Mohindra and published by . This book was released on 1989 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Distributed Shared Memory Transaction Support written by Frank Ian Smith and published by . This book was released on 1992 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shared Memory Synchronization written by Michael L. Scott and published by Springer Nature. This book was released on 2022-05-31 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Transactions in a Distributed Shared Memory System written by Dawn N. Jutla-Lewis and published by 1992.. This book was released on 1993 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Integrating Transactions and Distributed Shared Memory for Distributed Programming written by Pedro Alexandre Guimarães Lobo Ferreira do Souto and published by . This book was released on 1999 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shared Memory Synchronization written by Michael Lee Scott and published by Springer Nature. This book was released on 2024 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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

Download or read book Transactional Memory 2nd Edition written by Tim Harris and published by Morgan & Claypool Publishers. This book was released on 2010-10-10 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of multicore processors has renewed interest in the idea of incorporating transactions into the programming model used to write parallel programs. This approach, known as transactional memory, offers an alternative, and hopefully better, way to coordinate concurrent threads. The ACI (atomicity, consistency, isolation) properties of transactions provide a foundation to ensure that concurrent reads and writes of shared data do not produce inconsistent or incorrect results. At a higher level, a computation wrapped in a transaction executes atomically - either it completes successfully and commits its result in its entirety or it aborts. In addition, isolation ensures the transaction produces the same result as if no other transactions were executing concurrently. Although transactions are not a parallel programming panacea, they shift much of the burden of synchronizing and coordinating parallel computations from a programmer to a compiler, to a language runtime system, or to hardware. The challenge for the system implementers is to build an efficient transactional memory infrastructure. This book presents an overview of the state of the art in the design and implementation of transactional memory systems, as of early spring 2010. Table of Contents: Introduction / Basic Transactions / Building on Basic Transactions / Software Transactional Memory / Hardware-Supported Transactional Memory / Conclusions

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 Principles of Transactional Memory written by Rachid Guerraoui and published by Morgan & Claypool Publishers. This book was released on 2010-04-04 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transactional memory (TM) is an appealing paradigm for concurrent programming on shared memory architectures. With a TM, threads of an application communicate, and synchronize their actions, via in-memory transactions. Each transaction can perform any number of operations on shared data, and then either commit or abort. When the transaction commits, the effects of all its operations become immediately visible to other transactions; when it aborts, however, those effects are entirely discarded. Transactions are atomic: programmers get the illusion that every transaction executes all its operations instantaneously, at some single and unique point in time. Yet, a TM runs transactions concurrently to leverage the parallelism offered by modern processors. The aim of this book is to provide theoretical foundations for transactional memory. This includes defining a model of a TM, as well as answering precisely when a TM implementation is correct, what kind of properties it can ensure, what are the power and limitations of a TM, and what inherent trade-offs are involved in designing a TM algorithm. While the focus of this book is on the fundamental principles, its goal is to capture the common intuition behind the semantics of TMs and the properties of existing TM implementations. Table of Contents: Introduction / Shared Memory Systems / Transactional Memory: A Primer / TM Correctness Issues / Implementing a TM / Further Reading / Opacity / Proving Opacity: An Example / Opacity vs.\ Atomicity / Further Reading / The Liveness of a TM / Lock-Based TMs / Obstruction-Free TMs / General Liveness of TMs / Further Reading / Conclusions

Download or read book Transactional Memory Second Edition written by Tim Harris and published by Springer Nature. This book was released on 2022-05-31 with total page 247 pages. Available in PDF, EPUB and Kindle. Book excerpt: The advent of multicore processors has renewed interest in the idea of incorporating transactions into the programming model used to write parallel programs. This approach, known as transactional memory, offers an alternative, and hopefully better, way to coordinate concurrent threads. The ACI (atomicity, consistency, isolation) properties of transactions provide a foundation to ensure that concurrent reads and writes of shared data do not produce inconsistent or incorrect results. At a higher level, a computation wrapped in a transaction executes atomically - either it completes successfully and commits its result in its entirety or it aborts. In addition, isolation ensures the transaction produces the same result as if no other transactions were executing concurrently. Although transactions are not a parallel programming panacea, they shift much of the burden of synchronizing and coordinating parallel computations from a programmer to a compiler, to a language runtime system, or to hardware. The challenge for the system implementers is to build an efficient transactional memory infrastructure. This book presents an overview of the state of the art in the design and implementation of transactional memory systems, as of early spring 2010. Table of Contents: Introduction / Basic Transactions / Building on Basic Transactions / Software Transactional Memory / Hardware-Supported Transactional Memory / Conclusions

Download or read book Transaction Synchronization in Distributed Shared Virtual Memory Systems written by Harvard University. Center for Research in Computing Technology and published by . This book was released on 1989 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: We compare the performance of the two algorithms using simulation, and argue that significant performance gain can potentially result from bypassing memory coherence and supporting process synchronization directly on distributed memory. We also study the role of the optimistic algorithms in the context of DSVM, and show that some optimistic policy appears promising under the scenarios studied."

Download or read book Tools and Techniques for Efficient Transactions written by Pavan Poudel and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major challenge in modern multiprocessor computer programming is concurrency control: (i) how to coordinate accesses to memory locations shared among concurrently executing tasks and (ii) how to ensure that the computation is correct. The traditional approach is to use mutexes and locks but they have many drawbacks such as deadlocks. This dissertation explores the recently emerged paradigm of transactional memory for multiprocessor programming. In transactional memory, program code is split into transactions, blocks of code containing a sequence of read and write operations that appear to execute atomically to a set of shared resources. When transactions access the same shared resources at the same time, conflict occurs, and transactions may need to abort. A transaction commits if either no conflict occurs, or conflicts are resolved. Conflicts are typically resolved through a transaction scheduling algorithm. This dissertation explores transactional memory in the context of shared memory multiprocessor systems where concurrent tasks interact through reading and writing the same main memory as well as distributed multiprocessor systems where concurrent tasks interact by sending messages to each other. The main difference between shared memory and distributed systems is that there is non-uniformity in memory access latency in distributed systems, which is not the case in shared memory systems. This non-uniformity is vital and affects not only the total execution time of all concurrent tasks but also other related network parameters such as communication cost and congestion. For uniform latency, the focus is mainly on minimizing total execution time of all concurrent tasks. This dissertation develops several novel results in both shared memory and distributed multiprocessor systems. In shared memory systems, it develops a versioning method and a transaction scheduling mechanism. Specifically, it proposes an adaptive versioning method that switches between eager and lazy versioning methods during runtime, without knowing application characteristics a priori, so that the total execution time is always better than that is obtained applying eager and lazy versioning methods individually. This method is studied for both volatile and non-volatile shared memory systems. Additionally, an extensive experimental evaluation is performed using a state-of-the-art transactional memory system and benchmark suites and results are reported. In distributed systems, it develops a transaction scheduling method that provides an execution order of transactions minimizing total execution time and additionally related network parameter communication cost. It also develops an efficient and scalable execution framework, called GraphTM, for supporting TM in clusters and distributed systems. The proposed scheduling method is studied for (i) the data-flow execution model where transactions execute on the network node that issue them, but objects (memory) read/written by transactions move to the nodes those transactions are executing and (ii) the control-flow execution model where objects do not move but the transactions accessing the objects send requests to the node where objects are located to read/write that object. The time and communication bounds obtained are either optimal or near optimal for any offline, online, or dynamic arrival of transactions. Additionally, an extensive experimental evaluation is performed using state-of-the-art benchmark suites and results are reported.

Download or read book An Alternative Approach to Distributed Databases written by Jason W. May and published by . This book was released on 1989 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: