The experience of using Cuda Unified Memory technology to develop Multi-GPU applications is described. The paper deals with the method of transferring computations on the MGDS-GPU model two-dimensional problem described by the equations of single-layer shallow water with variable density over an uneven bottom. To solve the problem was applied balance - characteristic scheme “CABARET”. The minimum steps necessary to go from computing on the GPU to computing on the MULTI-GPU are given. The computational efficiency is investigated depending on the size of the grid.
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