Title

A Dynamic Loop Detection, Profiling and Optimization Tool

Publication Date

8-2007

Type of Culminating Activity

Thesis

Degree Title

Master of Science in Computer Science

Department

Computer Science

Major Advisor

Gang-Ryung Uh

Abstract

With the evolution of multi-core, multi-threaded processors from simple-scalar processors, the performance gains achieved by sequential programs will no longer be significant. This advances in technology places a greater responsibility on programmers for performance gains, resource utilization and program optimization. As a result, programmers will have to rely on thread-level parallelism (TLP), vectorization in addition to instruction-level parallelism (ILP) for improving performance.

To exploit TLP, applications need to be multi-threaded. The existing sequential applications can be made multi-threaded, by either manual, automatic or semi-automatic techniques. Manual techniques have been the predominant method to exploit TLP. Deciding which regions can be parallelized is difficult, especially in large, complex applications. Moreover, to achieve maximum performance gains, focus on coarse-grain parallelism is necessary. Loops have been the easy targets for parallelization and coarse-level parallelism implies that, efforts to parallelize the loop has to be moved to higher loop hierarchies.

In this work, a tool is developed which can detect loops presenting a complete hierarchical structure and collects detailed profile information which can assist the programmers to identify potential regions for optimization and parallelization.

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