Kurt J. Windisch

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Current processor allocation techniques for highly parallel systems are typically restricted to contiguous allocation strategies for which performance suuers signiicantly due to the inherent problem of fragmentation. As a result, message passing systems have yet to achieve the high utilization levels exhibited by traditional vector supercomputers. We are(More)
ProcSimity is a software tool that supports research in processor allocation and scheduling for highly parallel systems. ProcSimity's multicomputer simulator supports experimentation with selected allocation and scheduling algorithms on architectures with a range of network topologies and for several current routing and ow control mechanisms.(More)
Two basic approaches are taken when modeling workloads in simulation-based performance evaluation of parallel job scheduling algorithms: (1) a carefully reconstructed trace from a real supercomputer can provide a very realistic job stream, or (2) a exible synthetic model that attempts to capture the behavior of observed workloads can be devised. Both(More)
Current processor allocation techniques for highly parallel systems have thus far been restricted to contiguous allocation strategies for which performance suffers significantly due to the inherent problem of fragmentation. We are investigating processor allocation algorithms which lift the restriction on contiguity of processors in order to address the(More)
We investigate the applicability of k-spanners as shared virtual topologies for intradomain broadcast and multicast on the Internet. A lightweight k-spanner is a spanning subgraph of a network that has both relatively small total edge weight and small multiplicative penalty (at most k) on all point-to-point distances. We deene broadcasting and multicasting(More)
The nucleoprotein of Lassa virus, strain Josiah, was expressed in Escherichia coli as an N-terminally truncated, histidine-tagged recombinant protein. Following affinity purification the protein was completely denatured and spotted onto nitrocellulose membrane. A total of 1 microgram of protein was applied for detection of Lassa virus antibodies (LVA) in a(More)
EEcient utilization of processing resources in a large, multiuser parallel computer depends on processor allocation algorithms that minimize system fragmentation. We propose three processor allocation algorithms for the k-ary n-cube class of parallel architectures, which includes the hypercube and multidimensional torus. The k-ary Partner strategy is a(More)