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cupla - C++ User interface for the Platform Independent Library alpaka

Code Status dev

cupla Release

cupla [qχɑpˈlɑʔ] is a simple user interface for the platform independent parallel kernel acceleration library alpaka. It follows a similar concept as the NVIDIA® CUDA® API by providing a software layer to manage accelerator devices. alpaka is used as backend for cupla.

Please keep in mind that a first, "find & replace" port from CUDA to cupla(x86) will result in rather bad performance. In order to reach decent performance on x86 systems you just need to add the alpaka element level to your kernels.

(Read as: add some tiling to your CUDA kernels by letting the same thread compute a fixed number of elements (N=4..16) instead of just computing one element per thread. Also, make the number of elements in your tiling a compile-time constant and your CUDA code (N=1) will just stay with the very same performance while adding single-source performance portability for, e.g., x86 targets).

Software License

cupla is licensed under LGPLv3 or later.

For more information see LICENSE.md.

Dependencies

Usage

cupla can be used as a header-only library and without the CMake build system

Contributing

Any pull request will be reviewed by a maintainer.

Thanks to all active and former contributors.

Trademarks Disclaimer

All product names and trademarks are the property of their respective owners. CUDA® is a trademark of the NVIDIA Corporation.