Wavefront cache-friendly algorithm for compact numerical schemes
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Wavefront cache-friendly algorithm for compact numerical schemes

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Published by National Aeronautics and Space Administration, Langley Research Center, National Technical Information Service, distributor in Hampton, Va, [Springfield, Va .
Written in English


Book details:

Edition Notes

Other titlesWavefront cache friendly algorithm for compact numerical schemes.
StatementAlex Povitsky.
SeriesICASE report -- no. 99-40., [NASA contractor report] -- NASA/CR-1999-209708., NASA contractor report -- NASA CR-209708.
ContributionsLangley Research Center.
The Physical Object
FormatMicroform
Pagination1 v.
ID Numbers
Open LibraryOL17594106M
OCLC/WorldCa43819625

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Cache-Friendly Algorithm The second step of the Thomas algorithm is backward substitution (BS) The coefficients ok, bk, and ck are constant for compact schemes; therefore, LU factorization is performed only once and the first step computations include only forward substitution (6). Wavefront Cache-friendly Algorithm for Compact Numerical Schemes Alex Povitsky ICASE, Hampton, Virginia Institute for Computer Applications in Science and Engineering NASA Langley Research Center Hampton, VA Operated by Universities Space Research Association October Prepared for Langley Research Center under Contract NAS Compact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion. Computer implementation of these schemes requires numerous passes of data through cache memory that considerably reduces performance of these schemes. To reduce this di culty, anovel algorithm is proposed here. AbstractCompact numerical schemes provide high-order solution of PDEs with low dissipation and dispersion. Computer implementation of these schemes requires numerous passes of data through cache memory that considerably reduces performance of these schemes. To reduce this difficulty, a novel algorithm is proposed : A. Povitsky.

The Wavefront Algorithm. The wavefront algorithm involves a breadth first search of the graph beginning at the destination point until it reaches the start point. First, obstacles are marked with a 1 and your goal point is marked with a 2. Algorithms and Data Structures for Efficient Free Space Reclamation in WAFL Ram Kesavan, Rohit Singh, Travis Grusecki Yuvraj Patel Netapp University of Wisconsin-Madison [email protected] frh0,[email protected] [email protected] Abstract NetApp®WAFL®is a transactional file system that uses the copy-on-write mechanism to Cited by:   In this task, we will use the NXT mindstorrm robot kit to implement a path planning algorithm called the Wavefront algorithm. The workspace for this task is a 5 by 4 square grid with obstacles identified by numbers. References Primary Sources. The Compact Genetic Algorithm was proposed by Harik, Lobo, and Goldberg in [], based on a random walk model previously introduced by Harik et al. [].In the introductory paper, the cGA is demonstrated to be comparable to the Genetic Algorithm on standard binary string optimization problems.

Get this from a library! Wavefront cache-friendly algorithm for compact numerical schemes. [Alex Povitsky; Langley Research Center.]. Figure The wavefront propagation algorithm is a specialized version of Dijkstra's algorithm that optimizes the number of stages to reach the goal. Once the approximation has been made, any of the methods discussed in Section can be used to compute a . Automating Wavefront Parallelization for Sparse Matrix Computations Anand Venkat, Mahdi Soltan Mohammadiy, Jongsoo Park, Hongbo Rong, Rajkishore Barik, Michelle Mills Stroutyand Mary Hallz Parallel Computing Laboratory, Intel Corporation; Email: , , , @ Optical wavefront reconstruction algorithms played a central role in the effort to identify gross manufacturing errors in NASA's Hubble Space Telescope (HST). NASA's success with reconstruction algorithms on the HST has led to an effort to develop software that can aid and in some cases replace complicated, expensive, and error-prone by: