An Inspector-Executor Algorithm for Irregular Assignment Parallelization

Run-Time Parallelization of Irregular DOACROSS Loops

Dependencies between iterations of loop structures cannot always be determined at compile-time because they may depend on input data which is known only at run-time. A prime example is a loop accessing an array where the array indices are themselves functions of another array determined only at run-time. To parallelize such loops, it is necessary to perform a run-time analysis. We describe a ne...

Time Stamp Algorithms for Runtime Parallelization of DOACROSS Loops with Dynamic Dependences

ÐThis paper presents a time stamp algorithm for runtime parallelization of general DOACROSS loops that have indirect access patterns. The algorithm follows the INSPECTOR/EXECUTOR scheme and exploits parallelism at a fine-grained memory reference level. It features a parallel inspector and improves upon previous algorithms of the same generality by exploiting parallelism among consecutive reads ...

Automatic Parallelizing Compiler for Distributed Memory Parallel Computers: New Algorithms to Improve the Performance of the Inspector/executor

Parallelization Techniques for Sparse Matrix Applications

Sparse matrix problems are diicult to parallelize eeciently on distributed memory machines since data is often accessed indirectly. Inspector/executor strategies, which are typically used to parallelize loops with indirect references, incur substantial run-time preprocessing overheads when references with multiple levels of indirection are encountered | a frequent occurrence in sparse matrix al...

Extending the Applicability and Improving the Performance of Runtime Parallelization

When static analysis of a sequential loop fails to yield reliable information on its dependence structure, a parallelizing compiler is left with three alternatives: it can take the conservative option of emitting code for a sequential execution; it can optimistically emit code to speculatively execute the loop as a DOALL [6, 7]; or it can emit inspector-executor code to determine the actual dep...