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35 /*! \libinternal \file
36 * \brief Declaration of class which receives coordinates to GPU memory on PME task
38 * \author Alan Gray <alang@nvidia.com>
40 * \ingroup module_ewald
42 #ifndef GMX_PMECOORDINATERECEIVERGPU_H
43 #define GMX_PMECOORDINATERECEIVERGPU_H
47 #include "gromacs/gpu_utils/devicebuffer_datatype.h"
48 #include "gromacs/math/vectypes.h"
49 #include "gromacs/utility/gmxmpi.h"
60 class PmeCoordinateReceiverGpu
64 /*! \brief Creates PME GPU coordinate receiver object
65 * \param[in] pmeStream CUDA stream used for PME computations
66 * \param[in] comm Communicator used for simulation
67 * \param[in] ppRanks List of PP ranks
69 PmeCoordinateReceiverGpu(const DeviceStream& pmeStream, MPI_Comm comm, gmx::ArrayRef<PpRanks> ppRanks);
70 ~PmeCoordinateReceiverGpu();
73 * send coordinates buffer address to PP rank
74 * \param[in] d_x coordinates buffer in GPU memory
76 void sendCoordinateBufferAddressToPpRanks(DeviceBuffer<RVec> d_x);
80 * Receive coordinate synchronizer pointer from the PP ranks.
81 * \param[in] ppRank PP rank to receive the synchronizer from.
83 void receiveCoordinatesSynchronizerFromPpCudaDirect(int ppRank);
86 * Used for lib MPI, receives co-ordinates from PP ranks
87 * \param[in] recvbuf coordinates buffer in GPU memory
88 * \param[in] numAtoms starting element in buffer
89 * \param[in] numBytes number of bytes to transfer
90 * \param[in] ppRank PP rank to send data
92 void launchReceiveCoordinatesFromPpCudaMpi(DeviceBuffer<RVec> recvbuf, int numAtoms, int numBytes, int ppRank);
95 * For lib MPI, wait for coordinates from PP ranks
96 * For thread MPI, enqueue PP co-ordinate transfer event into PME stream
98 void synchronizeOnCoordinatesFromPpRanks();
102 std::unique_ptr<Impl> impl_;