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Evaluating the Performance of OpenACC in GCC

Parallel hardware deployed effectively provides speedup measured on logarithmic scales.

Accelerating GNU Performance

The OpenACC API defines a collection of directives and routines developed to help soothe frustrated programmers. Using OpenACC directives, a programmer helps a compiler uncover and schedule parallelism particularly on GPUs which possess a rich variety of parallel opportunities. PGI has been an early leader of OpenACC development, and the PGI compiler is the most mature implementation of OpenACC. GCC, on the other hand, is a relative newcomer to OpenACC.

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