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Subject: [OMPI devel] RFC: [UPDATE] Add some basic CUDA-aware support to reductions
From: Rolf vandeVaart (rvandevaart_at_[hidden])
Date: 2014-05-21 12:28:27


NOTE: This is an update to the RFC after review and help from George

WHAT: Add some basic support so that reduction functions can support GPU buffers. Create new coll module that is only compiled in when CUDA-aware support is compiled in. This patch moves the GPU data into a host buffer before the reduction call and move it back to GPU after the reduction call. Changes have no effect if CUDA-aware support is not compiled in.

WHY: Users of CUDA-aware support expect reductions to work.

WHEN: Friday, May 23, 2014

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