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36 /*! \libinternal \file
37 * \brief Implements the GPU region timer for CUDA.
39 * \author Aleksei Iupinov <a.yupinov@gmail.com>
44 #ifndef GMX_GPU_UTILS_GPUREGIONTIMER_CUH
45 #define GMX_GPU_UTILS_GPUREGIONTIMER_CUH
47 #include "gromacs/gpu_utils/cudautils.cuh"
49 #include "gpuregiontimer.h"
51 template <> struct GpuTraits<GpuFramework::CUDA>
53 using CommandStream = cudaStream_t;
54 using CommandEvent = void;
57 //! Short-hand for external use
58 using GpuRegionTimer = GpuRegionTimerWrapper<GpuFramework::CUDA>;
60 template <> class GpuRegionTimerImpl<GpuFramework::CUDA>
63 using CommandStream = typename GpuTraits<GpuFramework::CUDA>::CommandStream;
64 //! The underlying timing event pair - the beginning and the end of the timespan
65 cudaEvent_t eventStart_, eventStop_;
71 const int eventFlags = cudaEventDefault;
72 CU_RET_ERR(cudaEventCreate(&eventStart_, eventFlags), "GPU timing creation failure");
73 CU_RET_ERR(cudaEventCreate(&eventStop_, eventFlags), "GPU timing creation failure");
78 CU_RET_ERR(cudaEventDestroy(eventStart_), "GPU timing destruction failure");
79 CU_RET_ERR(cudaEventDestroy(eventStop_), "GPU timing destruction failure");
82 inline void openTimingRegion(CommandStream s)
84 CU_RET_ERR(cudaEventRecord(eventStart_, s), "GPU timing recording failure");
87 inline void closeTimingRegion(CommandStream s)
89 CU_RET_ERR(cudaEventRecord(eventStop_, s), "GPU timing recording failure");
92 inline double getLastRangeTime()
94 float milliseconds = 0.0;
95 CU_RET_ERR(cudaEventElapsedTime(&milliseconds, eventStart_, eventStop_), "GPU timing update failure");
100 inline void reset(){}