diff options
Diffstat (limited to 'extensions-builtin/Lora/network_oft.py')
| -rw-r--r-- | extensions-builtin/Lora/network_oft.py | 73 |
1 files changed, 36 insertions, 37 deletions
diff --git a/extensions-builtin/Lora/network_oft.py b/extensions-builtin/Lora/network_oft.py index 9ddb175c..f085eca5 100644 --- a/extensions-builtin/Lora/network_oft.py +++ b/extensions-builtin/Lora/network_oft.py @@ -12,6 +12,7 @@ class ModuleTypeOFT(network.ModuleType): # adapted from https://github.com/kohya-ss/sd-scripts/blob/main/networks/oft.py class NetworkModuleOFT(network.NetworkModule): def __init__(self, net: network.Network, weights: network.NetworkWeights): + super().__init__(net, weights) self.oft_blocks = weights.w["oft_blocks"] @@ -20,24 +21,29 @@ class NetworkModuleOFT(network.NetworkModule): self.dim = self.oft_blocks.shape[0] self.num_blocks = self.dim - #if type(self.alpha) == torch.Tensor: - # self.alpha = self.alpha.detach().numpy() - if "Linear" in self.sd_module.__class__.__name__: self.out_dim = self.sd_module.out_features elif "Conv" in self.sd_module.__class__.__name__: self.out_dim = self.sd_module.out_channels - self.constraint = self.alpha * self.out_dim + self.constraint = self.alpha + #self.constraint = self.alpha * self.out_dim self.block_size = self.out_dim // self.num_blocks - self.oft_multiplier = self.multiplier() + self.org_module: list[torch.Module] = [self.sd_module] + + self.R = self.get_weight() - # replace forward method of original linear rather than replacing the module - # self.org_forward = self.sd_module.forward - # self.sd_module.forward = self.forward + self.apply_to() + + # replace forward method of original linear rather than replacing the module + def apply_to(self): + self.org_forward = self.org_module[0].forward + self.org_module[0].forward = self.forward - def get_weight(self): + def get_weight(self, multiplier=None): + if not multiplier: + multiplier = self.multiplier() block_Q = self.oft_blocks - self.oft_blocks.transpose(1, 2) norm_Q = torch.norm(block_Q.flatten()) new_norm_Q = torch.clamp(norm_Q, max=self.constraint) @@ -45,38 +51,31 @@ class NetworkModuleOFT(network.NetworkModule): I = torch.eye(self.block_size, device=self.oft_blocks.device).unsqueeze(0).repeat(self.num_blocks, 1, 1) block_R = torch.matmul(I + block_Q, (I - block_Q).inverse()) - block_R_weighted = self.oft_multiplier * block_R + (1 - self.oft_multiplier) * I + block_R_weighted = multiplier * block_R + (1 - multiplier) * I R = torch.block_diag(*block_R_weighted) return R def calc_updown(self, orig_weight): - oft_blocks = self.oft_blocks.to(orig_weight.device, dtype=orig_weight.dtype) - block_Q = oft_blocks - oft_blocks.transpose(1, 2) - norm_Q = torch.norm(block_Q.flatten()) - new_norm_Q = torch.clamp(norm_Q, max=self.constraint) - block_Q = block_Q * ((new_norm_Q + 1e-8) / (norm_Q + 1e-8)) - I = torch.eye(self.block_size, device=oft_blocks.device).unsqueeze(0).repeat(self.num_blocks, 1, 1) - block_R = torch.matmul(I + block_Q, (I - block_Q).inverse()) - - block_R_weighted = self.oft_multiplier * block_R + (1 - self.oft_multiplier) * I - R = torch.block_diag(*block_R_weighted) - #R = self.get_weight().to(orig_weight.device, dtype=orig_weight.dtype) - # W = R*W_0 - updown = orig_weight + R - output_shape = [R.size(0), orig_weight.size(1)] + R = self.R + if orig_weight.dim() == 4: + weight = torch.einsum("oihw, op -> pihw", orig_weight, R) + else: + weight = torch.einsum("oi, op -> pi", orig_weight, R) + updown = orig_weight @ R + output_shape = [orig_weight.size(0), R.size(1)] + #output_shape = [R.size(0), orig_weight.size(1)] return self.finalize_updown(updown, orig_weight, output_shape) - # def forward(self, x, y=None): - # x = self.org_forward(x) - # if self.oft_multiplier == 0.0: - # return x - - # R = self.get_weight().to(x.device, dtype=x.dtype) - # if x.dim() == 4: - # x = x.permute(0, 2, 3, 1) - # x = torch.matmul(x, R) - # x = x.permute(0, 3, 1, 2) - # else: - # x = torch.matmul(x, R) - # return x + def forward(self, x, y=None): + x = self.org_forward(x) + if self.multiplier() == 0.0: + return x + R = self.get_weight().to(x.device, dtype=x.dtype) + if x.dim() == 4: + x = x.permute(0, 2, 3, 1) + x = torch.matmul(x, R) + x = x.permute(0, 3, 1, 2) + else: + x = torch.matmul(x, R) + return x |