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Full-Text Articles in Physical Sciences and Mathematics
Array Decompositions For Nonuniform Computational Environments, Maher Kaddoura, Sanjay Ranka, Albert Wang
Array Decompositions For Nonuniform Computational Environments, Maher Kaddoura, Sanjay Ranka, Albert Wang
College of Engineering and Computer Science - Former Departments, Centers, Institutes and Projects
Two-dimensional arrays are useful in a large variety of scientific and engineering applications. Parallelization of these applications requires the decomposition of array elements among different machines. Several data-decomposition techniques have been studied in the literature for machines with uniform computational power. In this paper we develop new methods for decomposing arrays into a cluster of machines with nonuniform computational power. Simulation results show that our methods provide superior decomposition over naive schemes.
An Extended Two-Phase Method For Accessing Sections Of Out-Of-Core Arrays, Rajeev Thakur, Alok Choudhary
An Extended Two-Phase Method For Accessing Sections Of Out-Of-Core Arrays, Rajeev Thakur, Alok Choudhary
Electrical Engineering and Computer Science - All Scholarship
A number of applications on parallel computers deal with very large data sets that cannot fit in the main memory. In such applications, data must be stored in files on disks and fetched into memory during program execution. Parallel programs with large out-of-core arrays stored in files must read/write smaller sections of the arrays from/to files. In this paper, we describe a method for accessing sections of out-of-core arrays efficiently. Our method, the extended two phase method, uses collective I/O: Processors cooperate to combine several I/O requests into fewer larger granularity requests, reorder requests so that the file is accessed …
A User Interface For The Visualization And Manipulation Of Arrays, Jennifer Leopold, A. Ambler
A User Interface For The Visualization And Manipulation Of Arrays, Jennifer Leopold, A. Ambler
Computer Science Faculty Research & Creative Works
The success of spreadsheets has shown that a visual representation of a 2D array greatly facilitates solving certain problems. However, spreadsheets are not general-purpose programming environments and are not suited to many problems that might naturally be solved using multi-dimensional arrays. Furthermore, spreadsheets employ a textual notation for cell references in formulas. This notation, which adds to the programmer''s burden by distinguishing between relative and absolute addressing, can be difficult to understand and is error-prone even for the most experienced users. In this paper, we present a user interface for multi-dimensional arrays within Formulate, a form-based visual programming language. This …