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OpenMP Reduction Operations

OpenMP reduction operations can be used for simple cases, such as incrementing a shared numeric variable or the summation of an array into a shared numeric variable. To implement a reduction operation, add the reduction clause within a parallel region to instruct the compiler to perform the summation operation in parallel using the specified operation and variable.

Debugging Parallel Programs

Your program might have bugs that are now being exposed during parallel execution because of changes in order, memory allocation, uninitialized memory contents, and so on.

Such bugs are debugged in the same way as a serial (single-threaded) application, with the following challenges:

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