279 lines
8.7 KiB
Python
279 lines
8.7 KiB
Python
import torch
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from torch import Tensor
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from comfy.ldm.flux.layers import timestep_embedding
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def has_affordable_memory(device: torch.device) -> bool:
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free_memory, _ = torch.cuda.mem_get_info(device)
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free_memory_gb = free_memory / (1024**3)
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return free_memory_gb > 24
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def is_newer_than_ada_lovelace(device: torch.device) -> int:
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cc_major, cc_minor = torch.cuda.get_device_capability(device)
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return cc_major * 10 + cc_minor >= 89
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def poly1d(coefficients, x):
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result = torch.zeros_like(x)
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for i, coeff in enumerate(coefficients):
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result += coeff * (x ** (len(coefficients) - 1 - i))
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return result
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def forward_orig(
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self,
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img: Tensor,
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img_ids: Tensor,
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txt: Tensor,
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txt_ids: Tensor,
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timesteps: Tensor,
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y: Tensor,
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guidance: Tensor = None,
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control=None,
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transformer_options={},
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attn_mask: Tensor = None,
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) -> Tensor:
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patches_replace = transformer_options.get("patches_replace", {})
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if img.ndim != 3 or txt.ndim != 3:
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raise ValueError("Input img and txt tensors must have 3 dimensions.")
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# running on sequences img
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img = self.img_in(img)
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vec = self.time_in(timestep_embedding(timesteps, 256).to(img.dtype))
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if self.params.guidance_embed:
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if guidance is None:
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raise ValueError(
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"Didn't get guidance strength for guidance distilled model."
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)
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vec = vec + self.guidance_in(timestep_embedding(guidance, 256).to(img.dtype))
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vec = vec + self.vector_in(y[:, : self.params.vec_in_dim])
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txt = self.txt_in(txt)
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ids = torch.cat((txt_ids, img_ids), dim=1)
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pe = self.pe_embedder(ids)
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blocks_replace = patches_replace.get("dit", {})
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for i, block in enumerate(self.double_blocks):
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if ("double_block", i) in blocks_replace:
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def block_wrap(args):
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out = {}
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out["img"], out["txt"] = block(
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img=args["img"],
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txt=args["txt"],
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vec=args["vec"],
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pe=args["pe"],
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attn_mask=args.get("attn_mask"),
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)
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return out
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out = blocks_replace[("double_block", i)](
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{"img": img, "txt": txt, "vec": vec, "pe": pe, "attn_mask": attn_mask},
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{"original_block": block_wrap},
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)
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txt = out["txt"]
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img = out["img"]
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else:
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img, txt = block(img=img, txt=txt, vec=vec, pe=pe, attn_mask=attn_mask)
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if control is not None: # Controlnet
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control_i = control.get("input")
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if i < len(control_i):
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add = control_i[i]
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if add is not None:
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img += add
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img = torch.cat((txt, img), 1)
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for i, block in enumerate(self.single_blocks):
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if ("single_block", i) in blocks_replace:
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def block_wrap(args):
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out = {}
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out["img"] = block(
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args["img"],
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vec=args["vec"],
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pe=args["pe"],
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attn_mask=args.get("attn_mask"),
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)
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return out
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out = blocks_replace[("single_block", i)](
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{"img": img, "vec": vec, "pe": pe, "attn_mask": attn_mask},
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{"original_block": block_wrap},
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)
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img = out["img"]
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else:
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img = block(img, vec=vec, pe=pe, attn_mask=attn_mask)
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if control is not None: # Controlnet
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control_o = control.get("output")
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if i < len(control_o):
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add = control_o[i]
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if add is not None:
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img[:, txt.shape[1] :, ...] += add
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img = img[:, txt.shape[1] :, ...]
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img = self.final_layer(img, vec) # (N, T, patch_size ** 2 * out_channels)
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return img
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def custom_forward_orig(
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self,
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img: Tensor,
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img_ids: Tensor,
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txt: Tensor,
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txt_ids: Tensor,
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timesteps: Tensor,
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y: Tensor,
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guidance: Tensor = None,
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control=None,
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transformer_options={},
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attn_mask: Tensor = None,
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) -> Tensor:
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patches_replace = transformer_options.get("patches_replace", {})
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if img.ndim != 3 or txt.ndim != 3:
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raise ValueError("Input img and txt tensors must have 3 dimensions.")
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# running on sequences img
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img = self.img_in(img)
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vec = self.time_in(timestep_embedding(timesteps, 256).to(img.dtype))
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if self.params.guidance_embed:
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if guidance is None:
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raise ValueError(
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"Didn't get guidance strength for guidance distilled model."
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)
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vec = vec + self.guidance_in(timestep_embedding(guidance, 256).to(img.dtype))
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vec = vec + self.vector_in(y[:, : self.params.vec_in_dim])
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txt = self.txt_in(txt)
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ids = torch.cat((txt_ids, img_ids), dim=1)
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pe = self.pe_embedder(ids)
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blocks_replace = patches_replace.get("dit", {})
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### teacache
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inp = img.clone()
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vec_ = vec.clone()
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img_mod1, _ = self.double_blocks[0].img_mod(vec_)
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modulated_inp = self.double_blocks[0].img_norm1(inp)
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modulated_inp = (1 + img_mod1.scale) * modulated_inp + img_mod1.shift
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if self.cnt == 0 or self.cnt == self.steps - 1:
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should_calc = True
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self.accumulated_rel_l1_distance = 0
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else:
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coefficients = [
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4.98651651e02,
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-2.83781631e02,
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5.58554382e01,
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-3.82021401e00,
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2.64230861e-01,
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]
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self.accumulated_rel_l1_distance += poly1d(
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coefficients,
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(
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(modulated_inp - self.previous_modulated_input).abs().mean()
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/ self.previous_modulated_input.abs().mean()
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),
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)
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if self.accumulated_rel_l1_distance < self.rel_l1_thresh:
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should_calc = False
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else:
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should_calc = True
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self.accumulated_rel_l1_distance = 0
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self.previous_modulated_input = modulated_inp
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self.cnt += 1
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if self.cnt == self.steps:
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self.cnt = 0
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if not should_calc:
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img += self.previous_residual
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else:
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orig_img = img.clone()
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for i, block in enumerate(self.double_blocks):
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#### skip blocks
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if i in self.ds_skip_blocks:
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continue
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if ("double_block", i) in blocks_replace:
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def block_wrap(args):
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out = {}
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out["img"], out["txt"] = block(
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img=args["img"],
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txt=args["txt"],
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vec=args["vec"],
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pe=args["pe"],
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attn_mask=args.get("attn_mask"),
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)
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return out
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out = blocks_replace[("double_block", i)](
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{
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"img": img,
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"txt": txt,
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"vec": vec,
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"pe": pe,
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"attn_mask": attn_mask,
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},
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{"original_block": block_wrap},
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)
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txt = out["txt"]
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img = out["img"]
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else:
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img, txt = block(img=img, txt=txt, vec=vec, pe=pe, attn_mask=attn_mask)
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if control is not None: # Controlnet
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control_i = control.get("input")
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if i < len(control_i):
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add = control_i[i]
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if add is not None:
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img += add
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img = torch.cat((txt, img), 1)
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for i, block in enumerate(self.single_blocks):
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#### skip blocks
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if i in self.ss_skip_blocks:
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continue
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if ("single_block", i) in blocks_replace:
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def block_wrap(args):
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out = {}
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out["img"] = block(
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args["img"],
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vec=args["vec"],
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pe=args["pe"],
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attn_mask=args.get("attn_mask"),
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)
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return out
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out = blocks_replace[("single_block", i)](
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{"img": img, "vec": vec, "pe": pe, "attn_mask": attn_mask},
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{"original_block": block_wrap},
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)
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img = out["img"]
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else:
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img = block(img, vec=vec, pe=pe, attn_mask=attn_mask)
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if control is not None: # Controlnet
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control_o = control.get("output")
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if i < len(control_o):
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add = control_o[i]
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if add is not None:
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img[:, txt.shape[1] :, ...] += add
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img = img[:, txt.shape[1] :, ...]
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self.previous_residual = img - orig_img
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img = self.final_layer(img, vec) # (N, T, patch_size ** 2 * out_channels)
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return img
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