Recently, distributed shared memory (DSM) systems have received much attention because such an abstraction simpliies programming. It has been shown that many practical applications using DSMs require competing operations. We have aimed at unifying theory and implementations of protocols for sequential consistency , which provides competing operations. The results are useful not only to clarify ...

Using runtime information of load distributions and processor affinity, we propose an adaptive scheduling algorithm and its variations from different control mechanisms. The proposed algorithm applies different degrees of aggressiveness to adjust loop scheduling granularities, aiming at improving the execution performance of parallel loops by making scheduling decisions that match the real work...

The performance of distributed shared memory (DSM) over a wide area network (WAN) may suffer due to high network latencies because of the low bandwidth available. To achieve acceptable performance, WAN-based DSM must minimize network traffic. DSM systems transmit consistency information over the network via diffs. Existing diff mechanisms for DSM systems that run on local area networks are not ...

In this paper, we describe the implementation of a parallel file I/O system on TreadMarks, a page-based software Distributed Shared Memory (DSM) system built on a network of workstations. The main goal of our parallel file I/O system is to reduce filerelated network traffic in TreadMarks. This prototype employs our previously proposed variable data distribution scheme, which distributes the fil...

In the paper, a communication infrastructure for faulttolerant embedded control system is discussed. It was developed as a part of experimental platform of the IFATIS project within the 5th European Union framework programme, dealing with dependable, reconfigurable integrated control systems. In such environments, a reliable and robust physical interconnection is required. The communication is ...

Much research has been done in fast communication on clusters and in protocols for supporting software shared memory across them. However, the end performance of applications that were written for the more proven hardware{ coherent shared memory is still not very good on these systems. Three major layers of software (and hardware) stand between the end user and parallel performance, each with i...

Prevalent Wi-Fi networks have adopted various protections to prevent eavesdropping caused by the intrinsic shared nature of wireless medium. However, many of them are based on pre-shared secret incurring key management costs, and are still vulnerable from practical countermeasures. In this study, we investigate the feasibility of using defensive jamming technique to protect enterprise Wi-Fi net...

The Simultaneous Optical Multiprocessor Exchange Bus (SOME-Bus) is a low-latency, high-bandwidth interconnection network which directly links arbitrary pairs of processor nodes without contention, and can efficiently interconnect over one hundred nodes. Each node has a dedicated output channel and an array of receivers, with one receiver dedicated to every other node’s output channel. The SOME-...