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Full-Text Articles in Physical Sciences and Mathematics
Prefetching In File Systems For Mimd Multiprocessors, Carla Schlatter Ellis, David Kotz
Prefetching In File Systems For Mimd Multiprocessors, Carla Schlatter Ellis, David Kotz
Dartmouth Scholarship
The problem of providing file I/O to parallel programs has been largely neglected in the development of multiprocessor systems. There are two essential elements of any file system design intended for a highly parallel environment: parallel I/O and effective caching schemes. This paper concentrates on the second aspect of file system design and specifically, on the question of whether prefetching blocks of the file into the block cache can effectively reduce overall execution time of a parallel computation, even under favorable assumptions. \par Experiments have been conducted with an interleaved file system testbed on the Butterfly Plus multiprocessor. Results of …
Evaluation Of Concurrent Pools, David Kotz, Carla Ellis
Evaluation Of Concurrent Pools, David Kotz, Carla Ellis
Dartmouth Scholarship
The assignment of resources or tasks to processors in a distributed or parallel system needs to be done in a fashion that helps to balance the load and scales to large configurations. In an architectural model that distinguishes between local and remote data access, it is important to base these allocation functions on a mechanism that preserves locality and avoids high-latency remote references. This paper explores performance considerations affecting the design of such a mechanism, the Concurrent Pools data structure. We evaluate the effectiveness of three different implementations of concurrent pools under a variety of stressful workloads. Our experiments expose …