Exploiting speculative thread-level parallelism in data compression applications

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations


Although hardware support for Thread-Level Speculation (TLS) can ease the compiler's tasks in creating parallel programs by allowing the compiler to create potentially dependent parallel threads, advanced compiler optimization techniques must be developed and judiciously applied to achieve the desired performance. In this paper, we take a close examination on two data compression benchmarks, GZIP and BZIP2, propose, implement and evaluate new compiler optimization techniques to eliminate performance bottlenecks in tíieir parallel execution and improve their performance. The proposed techniques (i) remove the critical forwarding path created by synchronizing memory-resident values; (ii) identify and categorize reduction-like variables whose intermediate results are used within loops, and propose code transformation to remove the inter-thread data dependences caused by these variables; and (iii) transform the program to eliminate stalls caused by variations in thread size. While no previous work has reported significant performance improvement on parallelizing these two benchmarks, we are able to achieve up to 36% performance improvement for GZIP and 37% for BZIP2.

Original languageEnglish (US)
Title of host publicationLanguages and Compilers for Parallel Computing - 19th International Workshop, LCPC 2006, Revised Papers
Number of pages15
StatePublished - Dec 1 2007
Event19th International Workshop on Languages and Compilers for Parallel Computing, LCPC 2006 - New Orleans, LA, United States
Duration: Nov 2 2006Nov 4 2006

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume4382 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other19th International Workshop on Languages and Compilers for Parallel Computing, LCPC 2006
Country/TerritoryUnited States
CityNew Orleans, LA


Dive into the research topics of 'Exploiting speculative thread-level parallelism in data compression applications'. Together they form a unique fingerprint.

Cite this