Converting From Serial to Parallel Execution

Automatic vs.. Manual Conversion

Automatic parallelization

• Many compilers attempt to do some automatic parallelization, especially of DO loops

• Significant speedups usually require going beyond automatic level

Manual parallelization

• Programmer must spend time to parallelize

• Some possible actions ("Rules-of-thumb")

Remove inhibitors to parallelization

Insert constructs or calls to library routines

Run code through preprocessors

Restructure algorithm

• Software tools are available to assist

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