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Exploiting the full performance potential of distributed memory machines requires a careful distribution of data across the processors. Vienna Fortran is a language extension of Fortran which provides the user with a wide range of facilities for such mapping of data structures. In contrast to current programming practice , programs in Vienna Fortran are(More)
ii ACKNOWLEDGMENTS First of all I would like to thank my advisor, Rich DeMillo, who gave me the initial impetus to look into the problem of software debugging and helped me develop many ideas presented in this dissertation. I am also grateful to my co-advisor, Gene Spaord, whose expert advise, particularly on implementation issues, was always indispensable.(More)
The rapidly increasing number of cores in modern microprocessors is pushing the current high performance computing (HPC) systems into the petascale and exascale era. The hybrid nature of these systems—distributed memory across nodes and shared memory with non-uniform memory access within each node—poses a challenge to application developers. In this paper,(More)
Cloud computing environments are now widely available and are being increasingly utilized for technical computing. They are also being touted for high-performance computing (HPC) applications in science and engineering. For example, Amazon EC2 Services offers a specialized Cluster Compute instance to run HPC applications. In this paper, we compare the(More)
The coordination language Opus is an object-based extension of High Performance Fortran (HPF) that supports the integration of coarse-grain task parallelism with HPF-style data parallelism. In this paper we discuss Opus in the context of multidisciplinary applications (MDAs) which execute in a heterogeneous environment. After outlining the major properties(More)
Contention for shared resources in the memory hierarchy can have a profound effect on the performance of applications running on high-end computers based on commodity multicore microprocessors. In this paper we describe a methodology, based on differential performance analysis, to quantify the effect of this contention on parallel applications. In(More)
Geospatial Catalogue Web Service is a vital service for sharing and interoperating volumes of distributed heterogeneous geospatial resources, such as data, services, applications, and their replicas over the web. Based on the Grid technology and the Open Geospatial Consortium (0GC)'s Catalogue Service-Web Information Model, this paper proposes a new(More)