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37 * \brief Declaration of class which receives coordinates to GPU memory on PME task
39 * \author Alan Gray <alang@nvidia.com>
41 * \ingroup module_ewald
43 #ifndef GMX_PMECOORDINATERECEIVERGPU_IMPL_H
44 #define GMX_PMECOORDINATERECEIVERGPU_IMPL_H
48 #include "gromacs/ewald/pme_coordinate_receiver_gpu.h"
49 #include "gromacs/utility/arrayref.h"
51 class GpuEventSynchronizer;
55 /*! \internal \brief Class with interfaces and data for CUDA version of PME coordinate receiving functionality */
57 class PmeCoordinateReceiverGpu::Impl
61 /*! \brief Creates PME GPU coordinate receiver object
62 * \param[in] pmeStream CUDA stream used for PME computations
63 * \param[in] comm Communicator used for simulation
64 * \param[in] ppRanks List of PP ranks
66 Impl(const DeviceStream& pmeStream, MPI_Comm comm, gmx::ArrayRef<PpRanks> ppRanks);
70 * send coordinates buffer address to PP rank
71 * \param[in] d_x coordinates buffer in GPU memory
73 void sendCoordinateBufferAddressToPpRanks(DeviceBuffer<RVec> d_x);
76 * Receive coordinate synchronizer pointer from the PP ranks.
77 * \param[in] ppRank PP rank to receive the synchronizer from.
79 void receiveCoordinatesSynchronizerFromPpCudaDirect(int ppRank);
82 * Used for lib MPI, receives co-ordinates from PP ranks
83 * \param[in] recvbuf coordinates buffer in GPU memory
84 * \param[in] numAtoms starting element in buffer
85 * \param[in] numBytes number of bytes to transfer
86 * \param[in] ppRank PP rank to send data
88 void launchReceiveCoordinatesFromPpCudaMpi(DeviceBuffer<RVec> recvbuf, int numAtoms, int numBytes, int ppRank);
91 * For lib MPI, wait for coordinates from PP ranks
92 * For thread MPI, enqueue PP co-ordinate transfer event into PME stream
94 void synchronizeOnCoordinatesFromPpRanks();
97 //! CUDA stream for PME operations
98 const DeviceStream& pmeStream_;
99 //! communicator for simulation
102 gmx::ArrayRef<PpRanks> ppRanks_;
103 //! vector of MPI requests
104 std::vector<MPI_Request> request_;
105 //! vector of synchronization events to receive from PP tasks
106 std::vector<GpuEventSynchronizer*> ppSync_;
107 //! counter of messages to receive