Automatically assigned DDC number: 00435

Manually assigned DDC number: 00435

Number of references: 8

Title: Data Access Reorganizations in Compiling Out-of-core Data Parallel Programs on Distributed Memory Machines

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Subject: Rajesh Bordawekar,Alok Choudhary,Rajeev Thakur Data Access Reorganizations in Compiling Out-of-core Data Parallel Programs on Distributed Memory Machines

Description: This paper describes techniques for translating out-of-core programs written in a data parallel language like HPF to message passing node programs with explicit parallel I/O. We describe the basic compilation model and various steps involved in the compilation. The compilation process is explained with the help of an out-of-core matrix multiplication program. We first discuss how an out-of-core program can be translated by extending the method used for translating in-core programs. We demonstrate that straightforward extension of in-core compiler does not work for out-of-core programs. We then describe how the compiler can optimize the code by (1) estimating the I/O costs associated with different array access patterns, (2) reorganizing array accesses, (3) selecting the method with the least I/O cost, and (4) allocating memory according to access cost for competing out-of-core arrays. These optimizations can reduce the amount of I/O by as much as an order of magnitude. Performance resu...

Contributor: The Pennsylvania State University CiteSeer Archives

Publisher: unknown

Date: 1998-12-27

Pubyear: 1994

Format: ps

Identifier: http://citeseer.ist.psu.edu/160724.html

Source: ftp://erc.cat.syr.edu/ece/choudhary/PASSION/access_reorg.ps.Z

Language: en

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Rights: unrestricted

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