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16 Module Documentation3.6 Event ManagementFunctions• 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.3.6.1 Detailed DescriptionThis section describes the event management functions of the CUDA runtime application programming interface.3.6.2 Function Documentation3.6.2.1 cudaError_t cudaEventCreate (cudaEvent_t ∗ event)Creates an event object using cudaEventDefault.Parameters:event - Newly created eventReturns:Note:cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValue, cudaErrorMemoryAllocationSee also:Note that this function may also return error codes from previous, asynchronous launches.cudaEventCreateWithFlags, cudaEventRecord, cudaEventQuery, cudaEventSynchronize, cudaEventDestroy, cudaEventElapsedTimeGenerated on Wed Apr 1 16:11:42 2009 for NVIDIA CUDA Library by Doxygen
3.6 Event Management 173.6.2.2 cudaError_t cudaEventCreateWithFlags (cudaEvent_t ∗ event, int flags)Creates an event object with the specified flags.Valid flags include: cudaEventDefault, cudaEventBlockingSyncParameters:event - Newly created eventflags - Flags for new eventReturns:Note:cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValue, cudaErrorMemoryAllocationSee also:Note that this function may also return error codes from previous, asynchronous launches.cudaEventCreate, cudaEventRecord, cudaEventQuery, cudaEventSynchronize, cudaEventDestroy, cudaEventElapsedTime3.6.2.3 cudaError_t cudaEventDestroy (cudaEvent_t event)Destroys the specified event object.Parameters:event - Event to destroyReturns:Note:See also:cudaSuccess, cudaErrorInitializationError, cudaErrorPriorLaunchFailure, cudaErrorInvalidValueNote that this function may also return error codes from previous, asynchronous launches.cudaEventCreate, cudaEventCreateWithFlags, cudaEventQuery, cudaEventSynchronize, cudaEventRecord, cudaEventElapsedTime3.6.2.4 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). Ifeither event has not been recorded yet, this function returns cudaErrorInvalidValue. If either event has been recordedwith a non-zero stream, the result is undefined.Parameters:ms - Time between start and stop in msGenerated on Wed Apr 1 16:11:42 2009 for NVIDIA CUDA Library by Doxygen
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