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35 #ifndef GMX_GPU_UTILS_DEVICE_STREAM_H
36 #define GMX_GPU_UTILS_DEVICE_STREAM_H
38 /*! \libinternal \file
40 * \brief Declarations for DeviceStream class.
42 * \author Artem Zhmurov <zhmurov@gmail.com>
43 * \author Mark Abraham <mark.j.abraham@gmail.com>
45 * \ingroup module_gpu_utils
51 #if GMX_GPU == GMX_GPU_CUDA
52 # include <cuda_runtime.h>
54 #elif GMX_GPU == GMX_GPU_OPENCL
55 # include "gromacs/gpu_utils/gmxopencl.h"
57 #include "gromacs/utility/classhelpers.h"
59 struct DeviceInformation;
62 //! Enumeration describing the priority with which a stream operates.
63 enum class DeviceStreamPriority : int
65 //! High-priority stream
67 //! Normal-priority stream
69 //! Conventional termination of the enumeration
73 /*! \libinternal \brief Declaration of platform-agnostic device stream/queue.
75 * The command stream (or command queue) is a sequence of operations that are executed
76 * in they order they were issued. Several streams may co-exist to represent concurency.
77 * This class declares the interfaces, that are exposed to platform-agnostic code and
78 * it should be implemented for each compute architecture (e.g. CUDA and OpenCL).
80 * Destruction of the \p DeviceStream calls the destructor of the underlying low-level
81 * stream/queue, hence should only be called when the stream is no longer needed. To
82 * prevent accidental stream destruction, while copying or moving a \p DeviceStream
83 * object, copy and move constructors and copy and move assignments are not allowed
84 * and the \p DeviceStream object should be passed as a pointer or constant reference.
90 //! Default constructor
97 * \param[in] deviceContext Device context (not used in CUDA).
98 * \param[in] priority Stream priority: high or normal.
99 * \param[in] useTiming If the timing should be enabled (not used in CUDA).
101 void init(const DeviceContext& deviceContext, DeviceStreamPriority priority, bool useTiming);
103 /*! \brief Construct and init.
105 * \param[in] deviceContext Device context (only used in OpenCL).
106 * \param[in] priority Stream priority: high or normal (only used in CUDA).
107 * \param[in] useTiming If the timing should be enabled (only used in OpenCL).
109 DeviceStream(const DeviceContext& deviceContext, DeviceStreamPriority priority, const bool useTiming)
111 init(deviceContext, priority, useTiming);
114 /*! \brief Check if the underlying stream is valid.
116 * \returns Whether the stream is valid (false in CPU-only builds).
118 bool isValid() const;
120 //! Synchronize the steam
121 void synchronize() const;
123 #if GMX_GPU == GMX_GPU_CUDA
126 cudaStream_t stream() const;
127 //! Setter (temporary, will be removed in the follow-up)
128 void setStream(cudaStream_t stream) { stream_ = stream; }
131 cudaStream_t stream_ = nullptr;
133 #elif GMX_GPU == GMX_GPU_OPENCL
136 cl_command_queue stream() const;
137 //! Setter (temporary, will be removed in the follow-up)
138 void setStream(cl_command_queue stream) { stream_ = stream; }
141 cl_command_queue stream_ = nullptr;
145 GMX_DISALLOW_COPY_MOVE_AND_ASSIGN(DeviceStream);
148 #endif // GMX_GPU_UTILS_DEVICE_STREAM_H