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20 Module Documentation 4.6 Event Management Functions • cudaError_t cudaEventCreate (cudaEvent_t ∗event) Creates an event object. • cudaError_t cudaEventCreateWithFlags (cudaEvent_t ∗event, int flags) Creates an event object with the specified flags. • cudaError_t cudaEventDestroy (cudaEvent_t event) Destroys an event object. • cudaError_t cudaEventElapsedTime (float ∗ms, cudaEvent_t start, cudaEvent_t end) Computes the elapsed time between events. • cudaError_t cudaEventQuery (cudaEvent_t event) Query if an event has been recorded. • cudaError_t cudaEventRecord (cudaEvent_t event, cudaStream_t stream) Records an event. • cudaError_t cudaEventSynchronize (cudaEvent_t event) Wait for an event to be recorded. 4.6.1 Detailed Description This section describes the event management functions of the CUDA runtime application programming interface. 4.6.2 Function Documentation 4.6.2.1 cudaError_t cudaEventCreate (cudaEvent_t ∗ event) Creates an event object using cudaEventDefault. Parameters: event - Newly created event Returns: Note: cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValue, cudaErrorMemoryAllocation See also: Note that this function may also return error codes from previous, asynchronous launches. cudaEventCreateWithFlags, cudaEventRecord, cudaEventQuery, cudaEventSynchronize, cudaEventDestroy, cudaEventElapsedTime Generated for NVIDIA CUDA Library by Doxygen
4.6 Event Management 21 4.6.2.2 cudaError_t cudaEventCreateWithFlags (cudaEvent_t ∗ event, int flags) Creates an event object with the specified flags. Valid flags include: • cudaEventDefault: Default event creation flag. • cudaEventBlockingSync: Specifies that event should use blocking synchronization. A host thread that uses cudaEventSynchronize() to wait on an event created with this flag will block until the event actually completes. Parameters: event - Newly created event flags - Flags for new event Returns: Note: cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValue, cudaErrorMemoryAllocation See also: Note that this function may also return error codes from previous, asynchronous launches. cudaEventCreate, cudaEventRecord, cudaEventQuery, cudaEventSynchronize, cudaEventDestroy, cudaEventElapsedTime 4.6.2.3 cudaError_t cudaEventDestroy (cudaEvent_t event) Destroys the specified event object. Parameters: event - Event to destroy Returns: Note: See also: cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValue Note that this function may also return error codes from previous, asynchronous launches. cudaEventCreate, cudaEventCreateWithFlags, cudaEventQuery, cudaEventSynchronize, cudaEventRecord, cudaEventElapsedTime 4.6.2.4 cudaError_t cudaEventElapsedTime (float ∗ ms, cudaEvent_t start, cudaEvent_t end) Computes the elapsed time between two events (in milliseconds with a resolution of around 0.5 microseconds). If either event has not been recorded yet, this function returns cudaErrorInvalidValue. If either event has been recorded with a non-zero stream, the result is undefined. Generated for NVIDIA CUDA Library by Doxygen
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Page 4 and 5: ii CONTENTS 4.4.2.6 cudaSetDeviceFl
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Page 18 and 19: 2 Deprecated List Global cudaD3D9Re
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110 Module Documentation 4.20 Data
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116 Module Documentation 4.21 CUDA
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118 Module Documentation 4.23 Devic
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120 Module Documentation • CU_DEV
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124 Module Documentation 4.24 Versi
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138 Module Documentation 4.28 Event
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140 Module Documentation 4.28.2.4 c
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148 Module Documentation Parameters
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150 Module Documentation Copies mem
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168 Module Documentation If srcMemo
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170 Module Documentation cuMemcpy3D
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172 Module Documentation 4.30.2.18
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234 Module Documentation 4.40 Data
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236 Module Documentation • enum C
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Index C++ API Routines, 102 Context
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264 INDEX CUDA_TYPES, 239 CU_MEMHOS
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266 INDEX CUDA_ERROR_UNMAP_FAILED C
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268 INDEX CUDA_TYPES, 239 cudaBindT
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270 INDEX cudaGetLastError CUDART_E
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272 INDEX cudaGraphicsRegisterFlags
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274 INDEX CUdevice_attribute CUDA_T
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276 INDEX CUMEM, 164 cuMemcpy3DAsyn
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