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39 lines
1.4 KiB
C++
39 lines
1.4 KiB
C++
/*
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Copyright 2022-2023 SINTEF AS
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPM_GPUISTL_SET_DEVICE_HEADER
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#define OPM_GPUISTL_SET_DEVICE_HEADER
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namespace Opm::gpuistl
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{
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//! @brief Sets the correct CUDA device in the setting of MPI
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//!
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//! @note This assumes that every node has equally many GPUs, all of the same caliber
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//!
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//! @note This probably needs to be called *before* MPI_Init if one uses GPUDirect transfers (see eg.
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//! https://devtalk.nvidia.com/default/topic/752046/teaching-and-curriculum-support/multi-gpu-system-running-mpi-cuda-/
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//! )
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//!
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//! @note If no CUDA device is present, this does nothing.
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void setDevice(int mpiRank, int numberOfMpiRanks);
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void printDevice(int mpiRank, int numberOfMpiRanks);
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} // namespace Opm::gpuistl
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#endif
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