Is cuDNNTransformTensor a sync or async kernel?

cuDNNTransformTensor is used to relayout tensor on memory. I notice there are two kinds of memcpy API with sync and async version. I wonder is there similar operation in TransformTensor? Thanks.

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Someone told me cuMemcpy and suMemCpyAsync is a runtimeAPI, while cuDNNTransformTensor is a DNN API. There is no sync or async attribute for DNN API due to it is a kernel, this question could be closed.


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