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Integrating GPGPU computations with CPU coroutines in C++

Pavel A. Lebedev
Subdepartment of Computer Security, National Research University Higher School of Economics, 34 Tallinskaya Ulitsa, Moscow, Russia
Journal of Physics: Conference Series 681 (2016) 012048, 2016

@inproceedings{lebedev2016integrating,

   title={Integrating GPGPU computations with CPU coroutines in C++},

   author={Lebedev, Pavel A},

   booktitle={Journal of Physics: Conference Series},

   volume={681},

   number={1},

   pages={012048},

   year={2016},

   organization={IOP Publishing}

}

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We present results on integration of two major GPGPU APIs with reactor-based event processing model in C++ that utilizes coroutines. With current lack of universally usable GPGPU programming interface that gives optimal performance and debates about the style of implementing asynchronous computing in C++, we present a working implementation that allows a uniform and seamless approach to writing C++ code with continuations that allow processing on CPUs or CUDA/OpenCL accelerators. Performance results are provided that show, if corner cases are avoided, this approach has negligible performance cost on latency.
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