From 16b4509fa60ec03102b2452b41799dafccd35970 Mon Sep 17 00:00:00 2001 From: brkirch Date: Sat, 17 Dec 2022 03:21:19 -0500 Subject: [PATCH] Add numpy fix for MPS on PyTorch 1.12.1 When saving training results with torch.save(), an exception is thrown: "RuntimeError: Can't call numpy() on Tensor that requires grad. Use tensor.detach().numpy() instead." So for MPS, check if Tensor.requires_grad and detach() if necessary. --- modules/devices.py | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/modules/devices.py b/modules/devices.py index f8cffae1..800510b7 100644 --- a/modules/devices.py +++ b/modules/devices.py @@ -125,7 +125,16 @@ def layer_norm_fix(*args, **kwargs): return orig_layer_norm(*args, **kwargs) +# MPS workaround for https://github.com/pytorch/pytorch/issues/90532 +orig_tensor_numpy = torch.Tensor.numpy +def numpy_fix(self, *args, **kwargs): + if self.requires_grad: + self = self.detach() + return orig_tensor_numpy(self, *args, **kwargs) + + # PyTorch 1.13 doesn't need these fixes but unfortunately is slower and has regressions that prevent training from working if has_mps() and version.parse(torch.__version__) < version.parse("1.13"): torch.Tensor.to = tensor_to_fix torch.nn.functional.layer_norm = layer_norm_fix + torch.Tensor.numpy = numpy_fix