CUDA Streams (What is CUDA Streams?)
Stream
A stream is a sequence of operations that are performed
in order on the device.
Streams allows independent concurrent in-order queues of
execution.
–Operations in different streams can be interleaved and
overlapped, which can be used to hide data transfers between host and device.
•Use cudaStreamCreate()
(runtime API) or cuStreamCreate() (Driver API) to create a stream of type cudaStream_t .
– The
default stream (ID=0) need not be create.
-- Multiple
streams exist within a single context, they share memory and other resources.
-- Copies
& Kernel launches with the same stream parameter execute
in-order.
Function Prototype
Creates a new asynchronous stream.
cudaError_t cudaStreamCreate (cudaStream_t * pStream)
Parameters:
pStream - Pointer to new stream identifier
Returns:
cudaSuccess, cudaErrorInvalidValue
Note that this function may also return error codes from
previous, asynchronous launches.
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