changes for #294

modules/devices.py

@@ -31,3 +31,20 @@ def enable_tf32():
 
 
 errors.run(enable_tf32, "Enabling TF32")
+
+
+device = get_optimal_device()
+device_codeformer = cpu if has_mps else device
+
+
+def randn(seed, shape):
+    # Pytorch currently doesn't handle setting randomness correctly when the metal backend is used.
+    if device.type == 'mps':
+        generator = torch.Generator(device=cpu)
+        generator.manual_seed(seed)
+        noise = torch.randn(shape, generator=generator, device=cpu).to(device)
+        return noise
+
+    torch.manual_seed(seed)
+    return torch.randn(shape, device=device)
+