| import torch |
| import os |
| import requests |
| from tqdm import tqdm |
| from diffusers import DDPMScheduler, EulerDiscreteScheduler |
| from typing import Any, Optional, Union |
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| def make_1step_sched(pretrained_path): |
| noise_scheduler_1step = DDPMScheduler.from_pretrained(pretrained_path, subfolder="scheduler") |
| noise_scheduler_1step.set_timesteps(1, device="cuda") |
| noise_scheduler_1step.alphas_cumprod = noise_scheduler_1step.alphas_cumprod.cuda() |
| return noise_scheduler_1step |
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| def my_lora_fwd(self, x: torch.Tensor, *args: Any, **kwargs: Any) -> torch.Tensor: |
| self._check_forward_args(x, *args, **kwargs) |
| adapter_names = kwargs.pop("adapter_names", None) |
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| if self.disable_adapters: |
| if self.merged: |
| self.unmerge() |
| result = self.base_layer(x, *args, **kwargs) |
| elif adapter_names is not None: |
| result = self._mixed_batch_forward(x, *args, adapter_names=adapter_names, **kwargs) |
| elif self.merged: |
| result = self.base_layer(x, *args, **kwargs) |
| else: |
| result = self.base_layer(x, *args, **kwargs) |
| torch_result_dtype = result.dtype |
| for active_adapter in self.active_adapters: |
| if active_adapter not in self.lora_A.keys(): |
| continue |
| lora_A = self.lora_A[active_adapter] |
| lora_B = self.lora_B[active_adapter] |
| dropout = self.lora_dropout[active_adapter] |
| scaling = self.scaling[active_adapter] |
| x = x.to(lora_A.weight.dtype) |
|
|
| if not self.use_dora[active_adapter]: |
| _tmp = lora_A(dropout(x)) |
| if isinstance(lora_A, torch.nn.Conv2d): |
| _tmp = torch.einsum('...khw,...kr->...rhw', _tmp, self.de_mod) |
| elif isinstance(lora_A, torch.nn.Linear): |
| _tmp = torch.einsum('...lk,...kr->...lr', _tmp, self.de_mod) |
| else: |
| raise NotImplementedError('only conv and linear are supported yet.') |
|
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| result = result + lora_B(_tmp) * scaling |
| else: |
| x = dropout(x) |
| result = result + self._apply_dora(x, lora_A, lora_B, scaling, active_adapter) |
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| result = result.to(torch_result_dtype) |
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| return result |
|
|
| def download_url(url, outf): |
| if not os.path.exists(outf): |
| print(f"Downloading checkpoint to {outf}") |
| response = requests.get(url, stream=True) |
| total_size_in_bytes = int(response.headers.get('content-length', 0)) |
| block_size = 1024 |
| progress_bar = tqdm(total=total_size_in_bytes, unit='iB', unit_scale=True) |
| with open(outf, 'wb') as file: |
| for data in response.iter_content(block_size): |
| progress_bar.update(len(data)) |
| file.write(data) |
| progress_bar.close() |
| if total_size_in_bytes != 0 and progress_bar.n != total_size_in_bytes: |
| print("ERROR, something went wrong") |
| print(f"Downloaded successfully to {outf}") |
| else: |
| print(f"Skipping download, {outf} already exists") |
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|
