Add pageable/pinned tensor to cuda reliability note in pinmem tutorial #3261
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🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/tutorials/3261
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| # However, in other cases we cannot make the same asusmption: when a tensor is placed in pinned memory, mutating the | ||
| # original copy after calling the host-to-device transfer may corrupt the data received on GPU. | ||
| # Similarly, when a transfer is achieved in the opposite direction, from GPU to CPU, or from any device that is not CPU | ||
| # or GPU to any device that is not a CUDA-handled GPU (e.g., MPS), there is no guarantee that the data read on GPU is |
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| # or GPU to any device that is not a CUDA-handled GPU (e.g., MPS), there is no guarantee that the data read on GPU is | |
| # or GPU to any device that is not a CUDA-handled GPU (such as, MPS), there is no guarantee that the data read on GPU is |
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Adds some more info on when it is unsafe to use
non_blocking(namely with pinned tensors)cc @nairbv