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8th Conference on Cloud Computing, Big Data and Emerging Topics

作者： Teragni, Matias Moran, Ricardo Zabala, Gonzalo Univ Abierta Interamericana RA-983 San Juan Buenos Aires Argentina Comison Invest Cient Provincia Buenos Aires Calle 526 E-10 Y 11 La Plata Buenos Aires Argentina

ISBN: (纸本)9783030612177;9783030612184

Edge computing proposes access to largely unused computational resources without the added cost of the latency between the user and the Cloud. To take advantage of it we designed and implemented an abstraction layer compatible with standard JavaScript that builds a distributed shared memory on top of any existing web browser, like the ones present in smartphones or tablets, and a cloud server, enabling developers to use existing application code and enhance it by enabling collaboration between those devices. The synchronization mechanism supports mixed consistency, preferring eventual consistency but providing a stronger serializability when required, allowing the developers to tune it to their specific needs.

关键词： distributed shared memory Edge computing Eventually consistent

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A real-time operating system supporting distributed shared memory for embedded control systems

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CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND APPLICATIONS 2019年第1-Sup期22卷 989-998页

作者： Tamura, Yuji Truong Thi Doan Chiba, Takahiro Yoo, Myungryun Yokoyama, Takanori Tokyo City Univ Setagaya Ku 1-28-1 Tamazutsumi Tokyo 1588557 Japan LINE Corp Tokyo Japan Syst Engn Consultants Co LTD Tokyo Japan

The paper presents a real-time operating system (RTOS) that provides a distributed shared memory (DSM) service for distributed embedded control systems. Model-based design is widely adopted in embedded control software design and the source code of software modules can be generated from a controller model. The generated software modules exchange their input and output values through shared variables. We develop a RTOS with a DSM service to provide a location-transparent environment, in which distributed software modules can exchange input and output values through the DSM. The RTOS is an extension to OSEK OS. We use a real-time network called FlexRay, which is based on a time division multiple access (TDMA) protocol. The consistency of the DSM is maintained according to the order of data transfer through FlexRay, not using inter-node synchronization. The worst case response time of the DSM is predictable if the FlexRay communication is well configured.

关键词： Operating systems Real-time systems Embedded systems distributed shared memory distributed control systems

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A distributed shared memory Middleware for Speculative Parallel Discrete Event Simulation

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ACM TRANSACTIONS ON MODELING AND COMPUTER SIMULATION 2020年第2期30卷 11-11页

作者： Principe, Matteo Tocci, Tommaso Di Sanzo, Pierangelo Quaglia, Francesco Pellegrini, Alessandro Univ Roma Tor Vergata DICII Via Politecn 1 I-00133 Rome Italy Barcelona Supercomput Ing Ctr Nexus 1 BldgCarrer Gran Capita 2 Barcelona 08034 Spain Sapienza Univ Rome DIAG Via Ariosto 25 I-00185 Rome Italy

The large diffusion of multi-core machines has pushed the research in the field of Parallel Discrete Event Simulation (PDES) toward new programming paradigms, based on the exploitation of shared memory. On the opposite side, the advent of Cloud computing and the possibility to group together many (low-cost) virtual machines to form a distributed memory cluster capable of hosting simulation applications-has raised the need to bridge shared memory programming and seamless distributed execution. In this article, we present the design of a distributed middleware that transparently allows a PDES application coded for shared memory systems to run on clusters of (Cloud) resources. Our middleware is based on a synchronization protocol called Event and Cross State Synchronization. It allows cross-simulation-object access by event handlers, thus representing a powerful tool for the development of various types of PDES applications. We also provide data for an experimental assessment of our middleware architecture, which has been integrated into the open source ROOT-Sim speculative PDES platform.

关键词： Parallel discrete event simulation distributed shared memory simulation state virtual time memory consistency

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distributed shared memory with CAN-Based Prioritized Mutual Exclusion for Embedded Control Systems

Distributed Shared Memory with CAN-Based Prioritized Mutual ...

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2019第七届计算机与通信管理国际会议

作者： Hiroki Fujishima Takanori Yokoyama Myungryun Yoo Tokyo City University

The paper presents distributed shared memory(DSM) for embedded control systems with CAN(Controller Area Network),which is widely used in various control *** provides a location-transparent environment,in which distributed tasks exchange data through the *** are a few DSM for distributed embedded control systems,which,however,do not provide efficient inter-node mutual *** paper presents DSM with prioritized mutual exclusion,which is efficiently implemented using the CAN arbitration *** DSM is based on a multiple reader/multiple writer model and supports entry *** mutual exclusion also supports the multiprocessor priority ceiling protocol to avoid deadlocks and reduce the blocking *** have built the DSM in a RTOS,which is an extension to an OSEK *** have also evaluated the performance of the DMS and we think that the performance is acceptable for practical embedded control systems.

关键词： distributed shared memory Real-time operating system distributed systems Embedded control systems

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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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The research of distributed shared memory technology in power system 2

The research of distributed shared memory technology in powe...

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2017 IEEE 2nd Information Technology, Networking, Electronic and Automation Control Conference (ITNEC 2017)

作者： Pan Xu Weijin Zhuang Xinghua Li Jin Liu Mingyang Sun Longda Huang Hong Zhang Jiajia Pan Xu Zhang China Electric Power Research Institute State Grid Ningxia Electric Power Research Institute

ISBN: (纸本)9781509064151;9781509064144

Data processing in power system is becoming to a performance limitation with the rapid development of power grid. This paper proposes a method to improve the data processing efficiency in power system by distributed memory sharing technology. By this method, the data is partitioned into fragments according to the value which is generated through a specific hash algorithm with the input of the key of the record, and the record will be stored into different machine's memory according to the hash value, by experiments compared to the original solution, distributed shared memory technology has obvious advantages on the performance of data processing.

关键词： power systems distributed shared memory data-processing memory computing

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A Real-Time Operating System Supporting distributed shared memory for Embedded Control Systems 8th

A Real-Time Operating System Supporting Distributed Shared M...

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iCatse International Conference on Information Science and Applications (ICISA)

作者： Tamura, Yuji Doan Truong Thi Chiba, Takahiro Yoo, Myungryun Yokoyama, Takanori Tokyo City Univ Setagaya Ku 1-28-1 Tamazutsumi Tokyo 1588557 Japan Fujitsu Publ Solut Ltd Tokyo Japan Syst Engn Consultants Co LTD Tokyo Japan

ISBN: (纸本)9789811041549;9789811041532

The paper presents a real-time operating system (RTOS) that supports distributed shared memory (DSM) for distributed embedded control systems. The RTOS provides a location-transparent environment, in which distributed software modules can exchange input and output values through the DSM. The RTOS is an extension to OSEK OS and it utilizes a real-time network called FlexRay. The consistency of the DSM is maintained according to the order of data transfer through FlexRay, not using inter-node synchronization. The worst case response time of the DSM is predictable if the FlexRay communication is well configured.

关键词： Operating systems Real-time systems Embedded systems distributed shared memory distributed control systems

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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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distributed shared memory based Live VM Migration 9

Distributed Shared Memory based Live VM Migration

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9th IEEE International Conference on Cloud Computing (CLOUD)

作者： Daradkeh, Tariq Agarwal, Anjali Concordia Univ Dept Elect & Comp Engn Montreal PQ Canada

ISBN: (纸本)9781509026197

Live virtual machine migration is an essential tool for dynamic resource management in current data centers. Many techniques have been developed to achieve this goal with minimum service interruption. In this paper, we propose a pre-copy live VM migration using distributed shared memory (DSM) computing model. The setup is built using two identical computation nodes to construct the environment services architecture namely the virtualization infrastructure, the shared storage server, and the DSM and High Performance Computing (HPC) cluster. The custom DSM framework is based on a low latency memory update Grappa. HPC cluster with OPENMPI and MPI libraries support parallelization and auto-parallelization work load by using CPUs computation nodes. The DSM allows the cluster CPUs to access the same memory space pages resulting in a lower memory data updates based on locality attributes updates, which reduces the amount of data transferred through the network. This model achieves a good enhancement of the live VM migration metrics. Downtime is reduced by 50% in the idle workload of Windows VM and 66.6% in case of Ubuntu Linux idle workload. In general, this model not only reduces the downtime and the total amount of data sent, but also does not degrade other metrics like the total migration time and the application performance.

关键词： Virtual Machine Total Migration Time Down Time distributed shared memory Physical Machine HPC

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A distributed shared memory Model and C++ Templated Meta-Programming Interface for the Epiphany RISC Array Processor

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Procedia Computer Science 2017年 108卷 1093-1102页

作者： David Richie James Ross Jamie Infantolino Brown Deer Technology MD USA U.S. Army Research Laboratory MD USA

The Adapteva Epiphany many-core architecture comprises a scalable 2D mesh Network-on-Chip (NoC) of low-power RíSC cores with minimal uncore functionality. Whereas such a processor offers high computational energy efficiency and parallel scalability, developing effective programming models that address the unique architecture features has presented many challenges. We present here a distributed shared memory (DSM) model supported in software transparently using C++ templated meta-programming techniques. The approach offers an extremely simple parallel programming model well suited for the architecture. Initial results are presented that demonstrate the approach and provide insight into the efficiency of the programming model and also the ability of the NoC to support a DSM without explicit control over data movement and localization.

关键词： 2D RISC array Adapteva Epiphany Parallella distributed shared memory templated meta-programming parallel programming model

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