torch.Tensor.record_stream

Tensor.record_stream(stream)

Ensures that the tensor memory is not reused for another tensor until all current work queued on stream are complete.

Note

The caching allocator is aware of only the stream where a tensor was allocated. Due to the awareness, it already correctly manages the life cycle of tensors on only one stream. But if a tensor is used on a stream different from the stream of origin, the allocator might reuse the memory unexpectedly. Calling this method lets the allocator know which streams have used the tensor.