446 lines
17 KiB
Python
446 lines
17 KiB
Python
from __future__ import annotations
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import functools
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import logging
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import os
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from typing import Any, Callable
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import torch
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from safetensors import safe_open
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from .residency import (
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KIND_CHECKPOINT,
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KIND_CLIP,
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KIND_CLIP_VISION,
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KIND_CONTROLNET,
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KIND_MODEL,
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KIND_VAE,
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REGISTRY,
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)
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_LOG = logging.getLogger(__name__)
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_PATCHED = False
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_ORIGINALS: dict[str, Callable[..., Any]] = {}
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def _normalize_device(device: Any | None) -> torch.device | None:
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if device is None:
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return None
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if isinstance(device, torch.device):
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return device
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try:
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return torch.device(device)
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except Exception:
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return None
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def _device_string(device: torch.device | None) -> str:
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if device is None:
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return "auto"
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return str(device)
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def _safe_open_device_arg(device: torch.device) -> Any:
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if device.type == "cuda":
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return device.index if device.index is not None else torch.cuda.current_device()
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if device.type == "cpu":
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return "cpu"
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return device.type
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def _copy_tensor_if_needed(
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tensor: torch.Tensor,
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target_device: torch.device,
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*,
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force_copy: bool = False,
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) -> torch.Tensor:
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if tensor.device == target_device and not force_copy:
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return tensor
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return tensor.to(device=target_device, copy=True)
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def _resolved_context(kind: str, source_path: str | None) -> tuple[torch.device | None, str, str | None]:
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ctx = REGISTRY.current_context()
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if ctx is not None and ctx.explicit_device is not None:
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return ctx.explicit_device, ctx.kind, ctx.note
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return REGISTRY.explicit_load_device(kind=kind, source_path=source_path), kind, None
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def _record_generic_load(
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*,
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path: str,
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method: str,
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requested_device: torch.device | None,
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actual_device: str,
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note: str | None = None,
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error: str | None = None,
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) -> None:
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ctx = REGISTRY.current_context()
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kind = ctx.kind if ctx is not None else "unknown"
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REGISTRY.record_load(
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path=path,
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kind=kind,
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method=method,
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requested_device=_device_string(requested_device),
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actual_device=actual_device,
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note=note or (ctx.note if ctx is not None else None),
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error=error,
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)
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def _patched_load_torch_file(ckpt, safe_load=False, device=None, return_metadata=False):
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import comfy.memory_management
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import comfy.utils as comfy_utils
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requested_device = _normalize_device(device)
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ctx = REGISTRY.current_context()
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if requested_device is None and ctx is not None and ctx.explicit_device is not None:
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requested_device = ctx.explicit_device
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if requested_device is None:
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requested_device = torch.device("cpu")
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metadata = None
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lowered = str(ckpt).lower()
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if lowered.endswith((".safetensors", ".sft")):
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try:
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if comfy.memory_management.aimdo_enabled and requested_device.type == "cpu":
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sd, metadata = comfy_utils.load_safetensors(ckpt)
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method = "safetensors_aimdo_cpu"
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if not return_metadata:
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metadata = None
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_record_generic_load(
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path=ckpt,
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method=method,
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requested_device=requested_device,
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actual_device="cpu",
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)
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return (sd, metadata) if return_metadata else sd
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safe_device = _safe_open_device_arg(requested_device)
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with safe_open(ckpt, framework="pt", device=safe_device) as handle:
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sd = {}
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for key in handle.keys():
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tensor = handle.get_tensor(key)
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if getattr(comfy_utils, "DISABLE_MMAP", False) and tensor.device.type == "cpu":
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tensor = _copy_tensor_if_needed(tensor, requested_device, force_copy=True)
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sd[key] = tensor
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if return_metadata:
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metadata = handle.metadata()
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actual_device = str(next(iter(sd.values())).device) if sd else str(requested_device)
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method = "safetensors_gpu_direct" if requested_device.type == "cuda" else "safetensors_cpu"
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_record_generic_load(
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path=ckpt,
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method=method,
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requested_device=requested_device,
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actual_device=actual_device,
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)
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return (sd, metadata) if return_metadata else sd
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except Exception as exc:
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if requested_device.type == "cuda":
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_LOG.warning(
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"GPU Resident Loader: direct GPU safetensors load failed for %s; falling back to CPU path: %s",
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ckpt,
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exc,
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)
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try:
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with safe_open(ckpt, framework="pt", device="cpu") as handle:
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sd = {}
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for key in handle.keys():
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sd[key] = handle.get_tensor(key).to(requested_device)
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if return_metadata:
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metadata = handle.metadata()
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_record_generic_load(
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path=ckpt,
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method="safetensors_cpu_then_copy_to_cuda",
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requested_device=requested_device,
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actual_device=str(requested_device),
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error=str(exc),
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)
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return (sd, metadata) if return_metadata else sd
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except Exception as fallback_exc:
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_record_generic_load(
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path=ckpt,
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method="safetensors_cpu_fallback_failed",
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requested_device=requested_device,
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actual_device="error",
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error=str(fallback_exc),
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)
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raise fallback_exc from exc
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if len(getattr(exc, "args", ())) > 0:
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message = exc.args[0]
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if isinstance(message, str):
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if "HeaderTooLarge" in message:
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raise ValueError(
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f"{message}\n\nFile path: {ckpt}\n\n"
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"The safetensors file is corrupt or invalid. Make sure this is actually a "
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"safetensors file and not a ckpt or pt or other filetype."
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) from exc
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if "MetadataIncompleteBuffer" in message:
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raise ValueError(
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f"{message}\n\nFile path: {ckpt}\n\n"
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"The safetensors file is corrupt/incomplete. Check the file size and make sure "
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"you have copied/downloaded it correctly."
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) from exc
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_record_generic_load(
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path=ckpt,
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method="safetensors_load_failed",
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requested_device=requested_device,
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actual_device="error",
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error=str(exc),
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)
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raise
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torch_args = {}
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if getattr(comfy_utils, "MMAP_TORCH_FILES", False):
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torch_args["mmap"] = True
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pl_sd = torch.load(ckpt, map_location=requested_device, weights_only=True, **torch_args)
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method = "torch_load_cpu_first_to_cuda" if requested_device.type == "cuda" else "torch_load_cpu"
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_record_generic_load(
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path=ckpt,
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method=method,
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requested_device=requested_device,
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actual_device=str(requested_device),
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)
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if "state_dict" in pl_sd:
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sd = pl_sd["state_dict"]
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else:
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if len(pl_sd) == 1:
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key = list(pl_sd.keys())[0]
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sd = pl_sd[key]
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if not isinstance(sd, dict):
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sd = pl_sd
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else:
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sd = pl_sd
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return (sd, metadata) if return_metadata else sd
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def _bind_checkpoint_outputs(result, source_path: str) -> None:
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if not result:
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return
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model = result[0] if len(result) > 0 else None
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clip = result[1] if len(result) > 1 else None
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vae = result[2] if len(result) > 2 else None
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if model is not None:
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REGISTRY.bind_object(model, source_path=source_path, kind=KIND_MODEL, note="checkpoint model")
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if clip is not None and getattr(clip, "patcher", None) is not None:
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REGISTRY.bind_object(clip.patcher, source_path=source_path, kind=KIND_CLIP, note="checkpoint clip")
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if vae is not None and getattr(vae, "patcher", None) is not None:
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REGISTRY.bind_object(vae.patcher, source_path=source_path, kind=KIND_VAE, note="checkpoint vae")
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def _bind_diffusers_outputs(result, source_path: str) -> None:
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if not result:
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return
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model = result[0] if len(result) > 0 else None
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clip = result[1] if len(result) > 1 else None
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vae = result[2] if len(result) > 2 else None
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if model is not None:
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REGISTRY.bind_object(model, source_path=source_path, kind=KIND_MODEL, note="diffusers model")
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if clip is not None and getattr(clip, "patcher", None) is not None:
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REGISTRY.bind_object(clip.patcher, source_path=source_path, kind=KIND_CLIP, note="diffusers clip")
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if vae is not None and getattr(vae, "patcher", None) is not None:
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REGISTRY.bind_object(vae.patcher, source_path=source_path, kind=KIND_VAE, note="diffusers vae")
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def _wrap_with_load_context(kind: str, path_arg_index: int = 0, bind_output: Callable[[Any, str], None] | None = None):
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def decorator(func: Callable[..., Any]) -> Callable[..., Any]:
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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source_path = None
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if len(args) > path_arg_index:
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source_path = args[path_arg_index]
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explicit_device = REGISTRY.explicit_load_device(kind=kind, source_path=source_path)
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with REGISTRY.load_context(kind=kind, source_path=source_path, explicit_device=explicit_device):
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result = func(*args, **kwargs)
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if bind_output is not None and source_path is not None:
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bind_output(result, source_path)
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return result
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return wrapper
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return decorator
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def _wrap_load_clip(func: Callable[..., Any]) -> Callable[..., Any]:
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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ckpt_paths = args[0] if args else kwargs.get("ckpt_paths")
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source_path = None
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if isinstance(ckpt_paths, (list, tuple)) and ckpt_paths:
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source_path = ckpt_paths[0]
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explicit_device = REGISTRY.explicit_load_device(kind=KIND_CLIP, source_path=source_path)
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with REGISTRY.load_context(kind=KIND_CLIP, source_path=source_path, explicit_device=explicit_device):
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clip = func(*args, **kwargs)
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if clip is not None and getattr(clip, "patcher", None) is not None and source_path is not None:
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REGISTRY.bind_object(clip.patcher, source_path=source_path, kind=KIND_CLIP)
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return clip
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return wrapper
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def _wrap_load_models_gpu(func: Callable[..., Any]) -> Callable[..., Any]:
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@functools.wraps(func)
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def wrapper(models, *args, **kwargs):
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result = func(models, *args, **kwargs)
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for model in list(models):
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REGISTRY.touch(model)
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REGISTRY.refresh_runtime_state()
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return result
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return wrapper
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def _wrap_free_memory(func: Callable[..., Any]) -> Callable[..., Any]:
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@functools.wraps(func)
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def wrapper(memory_required, device, keep_loaded=None, *args, **kwargs):
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import comfy.model_management as model_management
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keep_loaded = list(keep_loaded or [])
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sticky_wrappers = []
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if REGISTRY.get_policy() == "sticky_gpu":
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sticky_wrappers = [w for w in REGISTRY.sticky_loaded_wrappers(device) if w not in keep_loaded]
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unloaded = func(memory_required, device, keep_loaded + sticky_wrappers, *args, **kwargs)
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if device is not None and sticky_wrappers:
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try:
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free_after = model_management.get_free_memory(device)
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except Exception:
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free_after = None
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if free_after is not None and free_after < memory_required:
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_LOG.warning(
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"GPU Resident Loader: sticky set exceeded VRAM budget; allowing fallback eviction to satisfy request"
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)
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unloaded = func(memory_required, device, keep_loaded, *args, **kwargs)
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REGISTRY.refresh_runtime_state()
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return unloaded
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return wrapper
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def _remember_original(key: str, value: Callable[..., Any]) -> Callable[..., Any]:
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return _ORIGINALS.setdefault(key, value)
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def _patch_model_management_devices() -> None:
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import comfy.model_management as model_management
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def wrap_device_func(name: str) -> None:
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key = f"model_management.{name}"
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original = _remember_original(key, getattr(model_management, name))
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if getattr(model_management, name) is not original:
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return
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@functools.wraps(original)
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def wrapper(*args, **kwargs):
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result = original(*args, **kwargs)
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if not REGISTRY.wants_gpu_offload(name):
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return result
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gpu_device = model_management.get_torch_device()
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if getattr(gpu_device, "type", None) == "cpu":
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return result
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return gpu_device
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setattr(model_management, name, wrapper)
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for name in (
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"unet_offload_device",
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"text_encoder_offload_device",
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"vae_offload_device",
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"text_encoder_device",
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"vae_device",
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"unet_inital_load_device",
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):
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if hasattr(model_management, name):
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wrap_device_func(name)
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original_free_memory = _remember_original("model_management.free_memory", model_management.free_memory)
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if model_management.free_memory is original_free_memory:
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model_management.free_memory = _wrap_free_memory(original_free_memory)
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original_load_models_gpu = _remember_original("model_management.load_models_gpu", model_management.load_models_gpu)
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if model_management.load_models_gpu is original_load_models_gpu:
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model_management.load_models_gpu = _wrap_load_models_gpu(original_load_models_gpu)
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def install_patches() -> None:
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global _PATCHED
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if _PATCHED:
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return
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import comfy.clip_vision as clip_vision
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import comfy.controlnet as controlnet
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import comfy.diffusers_load as diffusers_load
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import comfy.model_management as model_management
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import comfy.sd as comfy_sd
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import comfy.utils as comfy_utils
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original_load_torch_file = _remember_original("utils.load_torch_file", comfy_utils.load_torch_file)
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if comfy_utils.load_torch_file is original_load_torch_file:
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comfy_utils.load_torch_file = _patched_load_torch_file
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if hasattr(clip_vision, "load_torch_file"):
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original_clip_vision_load_torch_file = _remember_original("clip_vision.load_torch_file", clip_vision.load_torch_file)
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if clip_vision.load_torch_file is original_clip_vision_load_torch_file:
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clip_vision.load_torch_file = comfy_utils.load_torch_file
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_patch_model_management_devices()
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original_load_checkpoint_guess_config = _remember_original(
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"sd.load_checkpoint_guess_config",
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comfy_sd.load_checkpoint_guess_config,
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)
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if comfy_sd.load_checkpoint_guess_config is original_load_checkpoint_guess_config:
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comfy_sd.load_checkpoint_guess_config = _wrap_with_load_context(
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KIND_CHECKPOINT,
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path_arg_index=0,
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bind_output=_bind_checkpoint_outputs,
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)(original_load_checkpoint_guess_config)
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original_load_diffusion_model = _remember_original("sd.load_diffusion_model", comfy_sd.load_diffusion_model)
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if comfy_sd.load_diffusion_model is original_load_diffusion_model:
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comfy_sd.load_diffusion_model = _wrap_with_load_context(
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KIND_MODEL,
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path_arg_index=0,
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bind_output=lambda model, source_path: model is not None
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and REGISTRY.bind_object(model, source_path=source_path, kind=KIND_MODEL),
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)(original_load_diffusion_model)
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original_load_clip = _remember_original("sd.load_clip", comfy_sd.load_clip)
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if comfy_sd.load_clip is original_load_clip:
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comfy_sd.load_clip = _wrap_load_clip(original_load_clip)
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original_clip_vision_load = _remember_original("clip_vision.load", clip_vision.load)
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if clip_vision.load is original_clip_vision_load:
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clip_vision.load = _wrap_with_load_context(
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KIND_CLIP_VISION,
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path_arg_index=0,
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bind_output=lambda result, source_path: result is not None
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and getattr(result, "patcher", None) is not None
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and REGISTRY.bind_object(result.patcher, source_path=source_path, kind=KIND_CLIP_VISION),
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)(original_clip_vision_load)
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original_load_controlnet = _remember_original("controlnet.load_controlnet", controlnet.load_controlnet)
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if controlnet.load_controlnet is original_load_controlnet:
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controlnet.load_controlnet = _wrap_with_load_context(KIND_CONTROLNET, path_arg_index=0)(original_load_controlnet)
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original_load_diffusers = _remember_original("diffusers_load.load_diffusers", diffusers_load.load_diffusers)
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if diffusers_load.load_diffusers is original_load_diffusers:
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diffusers_load.load_diffusers = _wrap_with_load_context(
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KIND_CHECKPOINT,
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path_arg_index=0,
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bind_output=_bind_diffusers_outputs,
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)(original_load_diffusers)
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REGISTRY.refresh_runtime_state()
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_PATCHED = True
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_LOG.info("GPU Resident Loader: monkey patches active on ComfyUI loader and residency paths")
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