Default stream value

Hi I thought the default stream number is 0.

But why Nsight System displays the default stream as non-zero value? Yet when I tried to cudaStreamSychronize(0), it seems to do the things I expected.

Because there is no connection between the stream “number” in API usage and the stream number reported by the profilers, including nsight systems. In the future, you may wish to ask nsight systems questions on the nsight systems forum.

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Thanks for the confirmation.