11558

Converting Data to Task-Parallelism by Rewrites

Ryan R. Newton, Eric Holk, Trevor L. McDonell
Indiana University
The 19th ACM SIGPLAN International Conference on Functional Programming (ICFP), 2014

@article{newton2014converting,

   title={Converting Data to Task-Parallelism by Rewrites},

   author={Newton, Ryan R and Holk, Eric and McDonell, Trevor L},

   year={2014}

}

High-level domain-specific-languages for array processing on the GPU are increasingly common, but to date they run only on a single GPU. We argue that languages will need to target multiple devices, even simultaneous combinations of GPU/GPU and CPU/GPU. Increased flexibility may be key to making these languages more easily deployable and thus widespread. To this end, we present a compositional translation that fissions data-parallel programs in the Accelerate language, allowing subsequent compiler stages to map computations on multiple devices via different code-generation backends. As a result, Accelerate becomes the first EDSL to exercise the CPU and GPU with each data-parallel kernel. Further, because Accelerate code is written at a level of abstraction that does not require per-platform tuning, the same source can run efficiently on and across different devices.
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