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检索条件"主题词=distributed shared memory"

共 311 条记录，以下是71-80 订阅

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An Improved Algorithm about Failure Agreement based on distributed shared memory

An Improved Algorithm about Failure Agreement based on Distr...

引用

International Conference on Advanced in Control Engineering and Information Science (CEIS)

作者： Wang, Jun Jiang, Yaqiong Guilin Univ Elect Technol Financial Dept Guilin Peoples R China Guilin Univ Elect Technol Network Informat Ctr Guilin Peoples R China

According to the uniform addressing and direct localization of network address space, adopting multi-threaded, multi-copy store and block storage in pages, page tree sub-node parallel failure methods, these can improve the efficiency and parallel processing of the DSM system. It is significance for improving the performance of distributed systems. (C) 2011 Published by Elsevier Ltd. Selection and/or peer-review under responsibility of [CEIS 2011]

关键词： distributed shared memory Failure Agreement Algorithm Security Parallelism

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Experiments Using a Software-distributed shared memory, MPI and 0MQ over Heterogeneous Computing Resources

Experiments Using a Software-Distributed Shared Memory, MPI ...

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26th International Conference on Parallel and distributed Computing (Euro-Par)

作者： Cudennec, Loic Trabelsi, Kods CEA LIST PC 172 F-91191 Gif Sur Yvette France DGA MI Dept Artificial Intelligence BP 7 F-35998 Rennes Armees France

ISBN: (纸本)9783030715939;9783030715922

distributed heterogeneous computing systems escalate the problem of choosing the appropriate programming model. Programming models such as message passing are efficient but require low-level management of communications. Higher level of programming such as shared memory are convenient for the application design but they usually have performance issues. With the recent development of distributed heterogeneous systems and new protocols to access remote memories, there is an opportunity for distributed shared memory systems to offer a satisfying level of abstraction while not giving up on performance. In this paper a video processing application is written using MPI, 0MQ and an in-house software-distributed shared memory (S-DSM) backend and deployed over a set of heterogeneous computing boards. Results show that 0MQ implementation is the most efficient but at the price of writing the application with the targeted platform in mind. The S-DSM implementation runs up to 2 times faster than the pure OpenMPI implementation and competes with 0MQ when the data granularity is small.

关键词： Heterogeneous computing distributed computing distributed shared memory Message passing

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Reduction of false sharing by using process affinity in page-based distributed shared memory multiprocessor systems

Reduction of false sharing by using process affinity in page...

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1996 IEEE 2nd International Conference on Algorithms and Architectures for Parallel Processing (ICA3PP 96)

作者： Hung, KP Yung, NHC Cheung, YS Univ of Hong Kong Hong Kong

ISBN: (纸本)0780335295

In page-based distributed shared memory systems, a large page size makes efficient use of interconnection network, but increases the chance of false sharing, white a small page size reduces the level of false sharing, but results in an inefficient use of the network. This paper proposes a technique that uses process affinity to achieve data pages clustering so as to optimize the temporal data locality on DSM systems, and therefore reduces the chance of false sharing and improves the data locality. To quantify the degree of process affinity for a piece of data, a measure called process affinity index is used that indicates the closeness between this piece of data and the process. Simulation results show that process affinity technique improves:he execution performance as page size increases due to the effective reduction of false sharing. In the best case, an order of magnitude performance improvement is achieved.

关键词： affinity scheduling process affinity data locality spatial locality temporal locality false sharing distributed shared memory

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A Real-Time Operating System with CAN-Based Inter-Node shared Resource Management and distributed shared memory 16

A Real-Time Operating System with CAN-Based Inter-Node Share...

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16th IEEE International Conference on Trust, Security and Privacy in Computing and Communications / The 11th IEEE International Conference on Big Data Science and Engineering / The 14th IEEE International Conference on Embedded Software and Systems

作者： Ishibashi, Kota Yoo, Myungryun Yokoyama, Takanori Tokyo City Univ Setagaya Ku 1-28-1 Tamazutsumi Tokyo 1588557 Japan Hitachi Ltd Tokyo Japan

ISBN: (纸本)9781509049066

The paper presents a real-time operating system (RTOS) that supports location-transparent shared resource management and distributed shared memory for distributed embedded control systems with CAN (Control Area Network) buses. In a distributed embedded control system, location transparent mechanisms are required because application tasks are distributed to a number of nodes. We have developed a RTOS that supports location-transparent inter-node shared resource management and distributed shared memory. The inter node resource access protocol is based on the Multiprocessor Priority Ceiling Protocol and inter-node locking is efficiently implemented using the arbitration mechanism of CAN. The distributed shared memory with mutual exclusion is also efficiently implemented. The RTOS is an extension to OSEK OS and supports not only inter-node resource management but also inter-core resource management for multi-core processors and inter-core and inter-node system calls for task management and event control. We have evaluated the performance of the RTOS and have confirmed that the performance is acceptable for practical embedded control systems.

关键词： real-time operating system distributed systems resource access protocol distributed shared memory embedded control systems

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Constructive and adaptable distributed shared memory 3

Constructive and adaptable distributed shared memory

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3rd International Workshop on High-Level Parallel Programming Models and Supportive Environments at the IPPS/SPDP 1998

作者： Bataller, J Bernabeu-Auban, JM Univ Politecn Valencia Dept Sistemes Informat & Computacio E-46071 Valencia Spain

ISBN: (纸本)0818684127

distributed shared memory (DSM) is a paradigm for programming distributed systems, which provides an alternative to the message passing model. DSM offers the agents of the system a shared address space through which they can communicate with each other The main problem of a DSM implementation on top of a message passing system is performance. Performance of an implementacion is closely related to the consistency the DSM system offers: strong consistency (all agents agree about how memory events happen) is more expensive to implement than weak consistency (disagreements are allowed). There have been many DSM systems proposals, each one supporting different consistency levels. Experience has shown that no one is well suited for the whole range of problems. Im some cases, strong consistent primitives are not needed, while in other cases, the weak semantics provided are useless. This is also true for different implementations of the same memory model, since performance is also afected by the data access patterns of the aplications.

关键词： distributed shared memory memory consistency models synchronized memory models

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DSMsim:: A distributed shared memory simulator for clusters of symmetric multi-processors

DSM<i>sim</i>:: A distributed shared memory simulator for cl...

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International Conference on Parallel and distributed Processing Techniques and Applications

作者： Thaker, D Chaudhary, V Wayne State Univ Inst Comp Sci Detroit MI 48202 USA

ISBN: (纸本)1892512459

distributed shared memory systems have become popular as a means of utilizing clusters of computers for solving large applications. We have developed a high-performance DSM at Wayne State University. To improve the performance of our DSM, we have developed a memory hierarchy simulator that allows us to compare various techniques very quickly and with much less effort. This paper describes our simulator, DSMSim. We show that the simulator's Performance closely matches the real system and demonstrate potential performance gains of up to 60 percent after adding optimization features to the simulator. The simulator also accepts the same code as the Software distributed shared memory.

关键词： distributed shared memory symmetric multiprocessors Augmint release consistency memory model

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A distributed shared memory Architecture for Occasionally Connected Mobile Environments 1

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8th International Symposium on Advanced Parallel Processing Technologies

作者： Schneble, Christophe Seidmann, Thomas Huser, Hansjorg Institute for Networked Systems University of Applied Science Rapperswil Switzerland Cdot AG Altishofen (LU) Switzerland

ISBN: (数字)9783642036446

ISBN: (纸本)9783642036439

In this paper we. present a distributed cache architecture for occasionally connected systems. The system is realised using an underlying P2P-infrastructure. The gridNet Framework provides a transparent interface for working with distributed cache-objects. The paper also contains a description of an envisioned example application running on top of the GridNet framework.

关键词： distributed shared memory object cache peer to peer P2P healthcare occasionally connected systems mobile environments mobile grids

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MENPS: A Decentralized distributed shared memory Exploiting RDMA 4

MENPS: A Decentralized Distributed Shared Memory Exploiting ...

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IEEE/ACM 4th Annual Workshop on Emerging Parallel and distributed Runtime Systems and Middleware (IPDRM)

作者： Endo, Wataru Sato, Shigeyuki Taura, Kenjiro Univ Tokyo Grad Sch Informat Sci & Technol Tokyo Japan

ISBN: (纸本)9780738110646

The spread of RDMA-capable interconnects on supercomputers has enabled the middleware developers to explore new design options for runtime systems based on efficient communications. Observing low-latency networks and shared-memory infrastructure for multi-core processors, we have focused on extending shared-memory abstraction into multiple nodes exploiting RDMA, i.e., distributed shared memory (DSM). We have found that the traditional protocols of DSM designed for two-sided communications cannot fully exploit the performance of RDMA, which necessitates decentralization and coarse-grained communications. To solve this problem, we introduced two methods for the DSM coherence protocol to exploit RDMA and implemented a DSM library MENPS using this protocol. Our evaluation shows that MENPS could accelerate two of five shared-memory applications with minimal modifications and beat an existing RDMA-based DSM runtime.

关键词： Cache coherence protocol distributed shared memory Home migration Rdma Timestamp based coherence

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Software distributed shared memory with Transactional Coherence A software engine to run transactional shared-memory parallel applications on clusters

Software Distributed Shared Memory with Transactional Cohere...

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18th Euromicro International Conference on Parallel, distributed and Network-Based Processing (PDP)

作者： Di Santo, Michele Ranaldo, Nadia Sementa, Carmine Zimeo, Eugenio Univ Sannio Dept Engn Benevento Italy

ISBN: (纸本)9780769539393

Transactional memory is a novel, promising approach for simplifying parallel programming and increasing its acceptance and diffusion. Until now, almost all the research work on TM has been focused on shared-memory architectures, while very limited effort has been dedicated to TM on distributed-memory architectures. In this paper, we propose an extension of the transactional engine DSTM2, originally designed for hardware shared-memory systems, so as to run transactional applications on the nodes of a computer cluster. The framework obtained provides a software distributed shared memory with transactional consistency whereby threads running on the nodes of a cluster can access a shared memory with atomicity and isolation. So the physical private memory of each node contributes to form a global address space accessible through programming statements having transactional semantics. The extension proposed is also useful for experimentally evaluating different techniques to be employed in a distributed implementation of TM.

关键词： transactional memory commodity clusters distributed shared memory scalability

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vDSM: distributed shared memory in Virtualized Environments 9

vDSM: Distributed Shared Memory in Virtualized Environments

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9th IEEE International Conference on Software Engineering and Service Science (ICSESS)

作者： Ding, Zhuocheng Shanghai Jiao Tong Univ Sch Elect Informat & Elect Engn Shanghai Peoples R China

ISBN: (纸本)9781538665657

Despite the prevalence and popularity of distributed frameworks, traditional clusters that can provide a single system image (SSI) are still of great importance since their programming model are simpler and more general. Currently, vtrtual clusters have largely replaced traditional cluster computing platforms. This provides a chance to reconsider the design of SSI syste ms, taking advantage of the characteristics of virtualized environments. This paper presents vDSM. a distributed shared memory designed with vtrtualtzatton in mind and is suitable fOy use in a vtrtuallzed environment. We use RDMA networks to speed up vDSM and propose techniques to further improve the performance of vDSM. With the help of vDSM, a distributed hypervlser can be built to run unmodified legacy operating systems transparently, providing even more transparency than traditional SSI solutions.

关键词： component distributed shared memory virtualiration low-latency network

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