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Fix kohya-ss OFT network wrong device for eye and constraint #14726

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Jan 23, 2024
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Fix kohya-ss OFT network wrong device for eye and constraint #14726

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4 changes: 2 additions & 2 deletions extensions-builtin/Lora/network_oft.py
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Original file line number Diff line number Diff line change
Expand Up @@ -57,12 +57,12 @@ def __init__(self, net: network.Network, weights: network.NetworkWeights):

def calc_updown(self, orig_weight):
oft_blocks = self.oft_blocks.to(orig_weight.device)
eye = torch.eye(self.block_size, device=self.oft_blocks.device)
eye = torch.eye(self.block_size, device=oft_blocks.device)

if self.is_kohya:
block_Q = oft_blocks - oft_blocks.transpose(1, 2) # ensure skew-symmetric orthogonal matrix
norm_Q = torch.norm(block_Q.flatten())
new_norm_Q = torch.clamp(norm_Q, max=self.constraint)
new_norm_Q = torch.clamp(norm_Q, max=self.constraint.to(oft_blocks.device))
block_Q = block_Q * ((new_norm_Q + 1e-8) / (norm_Q + 1e-8))
oft_blocks = torch.matmul(eye + block_Q, (eye - block_Q).float().inverse())

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