Hi Brian,
Stream is a sequence of operation that execute in issue-order on the GPU. It might not be getting compiled becasue you need to define it in the code using cudaStream_t . You can find more information in this slide deck :
https://developer.download.nvidia.com/CUDA/training/StreamsAndConcurrencyWebinar.pdf
Cuda events are synchronisation markers that can be used to synchronise streams or monitor progress of the code
https://docs.nvidia.com/cuda/cuda-runtime-api/group__CUDART__EVENT.html