Title: PPD: A practical parallel loop detector for parallelizing compilers on multiprocessor systems
Authors: Yang, CT
Wu, CT
Tseng, SS
National Chiao Tung University
Department of Computer Science
Keywords: parallelizing compiler;data dependence analysis;dependent tests;DOALL loops;DOACROSS loops;loop parallelization;I test
Issue Date: 1-Nov-1996
Abstract: It is well known that extracting parallel loops plays a significant role in designing parallelizing compilers. The execution efficiency of a loop is enhanced when the loop can be executed in parallel or partial parallel, like a DOALL or DOACROSS loop. This paper reports on the practical parallelism detector (PPD) that is implemented in PFPC (a portable FORTRAN parallelizing compiler running on OSF/1) at NCTU to concentrate on finding the parallelism available in loops. The PPD can extract the potential DOALL and DOACROSS loops in a program by invoking a combination of the ZIV test and the I test for verifying array subscripts. Furthermore, if DOACROSS loops are available, an optimization of synchronization statement is made. Experimental results show that PPD is more reliable and accurate than previous approaches.
URI: http://hdl.handle.net/11536/960
ISSN: 0916-8532
Volume: E79D
Issue: 11
Begin Page: 1545
End Page: 1560
Appears in Collections:Articles