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35 /*! \libinternal \file
36 * \brief Declaration of GPU PME-PP Communication.
38 * \author Alan Gray <alang@nvidia.com>
40 * \ingroup module_ewald
42 #ifndef GMX_PME_PP_COMM_GPU_H
43 #define GMX_PME_PP_COMM_GPU_H
47 #include "gromacs/gpu_utils/devicebuffer_datatype.h"
48 #include "gromacs/utility/gmxmpi.h"
52 class GpuEventSynchronizer;
57 class DeviceStreamManager;
61 * \brief Manages communication related to GPU buffers between this
62 * PME rank and its PP rank. */
67 /*! \brief Creates PME-PP GPU communication object
68 * \param[in] comm Communicator used for simulation
69 * \param[in] pmeRank Rank of PME task
70 * \param[in] deviceContext GPU context.
71 * \param[in] deviceStream GPU stream.
73 PmePpCommGpu(MPI_Comm comm, int pmeRank, const DeviceContext& deviceContext, const DeviceStream& deviceStream);
76 /*! \brief Perform steps required when buffer size changes
77 * \param[in] size Number of elements in buffer
79 void reinit(int size);
82 * Pull data from PME GPU directly using CUDA Memory copy.
83 * \param[out] recvPtr Buffer to receive PME force data
84 * \param[in] recvSize Number of elements to receive
85 * \param[in] recvPmeForceToGpu Whether receive is to GPU, otherwise CPU
87 void receiveForceFromPmeCudaDirect(void* recvPtr, int recvSize, bool recvPmeForceToGpu);
89 /*! \brief Push coordinates buffer directly to GPU memory on PME task
90 * \param[in] sendPtr Buffer with coordinate data
91 * \param[in] sendSize Number of elements to send
92 * \param[in] sendPmeCoordinatesFromGpu Whether send is from GPU, otherwise CPU
93 * \param[in] coordinatesReadyOnDeviceEvent Event recorded when coordinates are available on device
95 void sendCoordinatesToPmeCudaDirect(void* sendPtr,
97 bool sendPmeCoordinatesFromGpu,
98 GpuEventSynchronizer* coordinatesReadyOnDeviceEvent);
101 * Return pointer to buffer used for staging PME force on GPU
103 DeviceBuffer<gmx::RVec> getGpuForceStagingPtr();
106 * Return pointer to event recorded when forces are ready
108 GpuEventSynchronizer* getForcesReadySynchronizer();
112 std::unique_ptr<Impl> impl_;