710 lines
22 KiB
Python
710 lines
22 KiB
Python
import psutil
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from enum import Enum
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from comfy.cli_args import args
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import comfy.utils
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import torch
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import sys
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class VRAMState(Enum):
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DISABLED = 0 #No vram present: no need to move models to vram
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NO_VRAM = 1 #Very low vram: enable all the options to save vram
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LOW_VRAM = 2
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NORMAL_VRAM = 3
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HIGH_VRAM = 4
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SHARED = 5 #No dedicated vram: memory shared between CPU and GPU but models still need to be moved between both.
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class CPUState(Enum):
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GPU = 0
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CPU = 1
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MPS = 2
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# Determine VRAM State
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vram_state = VRAMState.NORMAL_VRAM
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set_vram_to = VRAMState.NORMAL_VRAM
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cpu_state = CPUState.GPU
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total_vram = 0
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lowvram_available = True
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xpu_available = False
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directml_enabled = False
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if args.directml is not None:
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import torch_directml
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directml_enabled = True
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device_index = args.directml
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if device_index < 0:
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directml_device = torch_directml.device()
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else:
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directml_device = torch_directml.device(device_index)
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print("Using directml with device:", torch_directml.device_name(device_index))
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# torch_directml.disable_tiled_resources(True)
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lowvram_available = False #TODO: need to find a way to get free memory in directml before this can be enabled by default.
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try:
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import intel_extension_for_pytorch as ipex
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if torch.xpu.is_available():
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xpu_available = True
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except:
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pass
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try:
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if torch.backends.mps.is_available():
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cpu_state = CPUState.MPS
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import torch.mps
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except:
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pass
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if args.cpu:
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cpu_state = CPUState.CPU
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def is_intel_xpu():
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global cpu_state
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global xpu_available
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if cpu_state == CPUState.GPU:
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if xpu_available:
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return True
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return False
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def get_torch_device():
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global directml_enabled
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global cpu_state
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if directml_enabled:
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global directml_device
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return directml_device
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if cpu_state == CPUState.MPS:
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return torch.device("mps")
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if cpu_state == CPUState.CPU:
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return torch.device("cpu")
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else:
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if is_intel_xpu():
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return torch.device("xpu")
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else:
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return torch.device(torch.cuda.current_device())
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def get_total_memory(dev=None, torch_total_too=False):
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global directml_enabled
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if dev is None:
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dev = get_torch_device()
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if hasattr(dev, 'type') and (dev.type == 'cpu' or dev.type == 'mps'):
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mem_total = psutil.virtual_memory().total
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mem_total_torch = mem_total
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else:
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if directml_enabled:
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mem_total = 1024 * 1024 * 1024 #TODO
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mem_total_torch = mem_total
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elif is_intel_xpu():
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stats = torch.xpu.memory_stats(dev)
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mem_reserved = stats['reserved_bytes.all.current']
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mem_total = torch.xpu.get_device_properties(dev).total_memory
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mem_total_torch = mem_reserved
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else:
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stats = torch.cuda.memory_stats(dev)
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mem_reserved = stats['reserved_bytes.all.current']
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_, mem_total_cuda = torch.cuda.mem_get_info(dev)
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mem_total_torch = mem_reserved
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mem_total = mem_total_cuda
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if torch_total_too:
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return (mem_total, mem_total_torch)
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else:
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return mem_total
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total_vram = get_total_memory(get_torch_device()) / (1024 * 1024)
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total_ram = psutil.virtual_memory().total / (1024 * 1024)
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print("Total VRAM {:0.0f} MB, total RAM {:0.0f} MB".format(total_vram, total_ram))
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if not args.normalvram and not args.cpu:
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if lowvram_available and total_vram <= 4096:
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print("Trying to enable lowvram mode because your GPU seems to have 4GB or less. If you don't want this use: --normalvram")
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set_vram_to = VRAMState.LOW_VRAM
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try:
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OOM_EXCEPTION = torch.cuda.OutOfMemoryError
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except:
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OOM_EXCEPTION = Exception
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XFORMERS_VERSION = ""
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XFORMERS_ENABLED_VAE = True
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if args.disable_xformers:
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XFORMERS_IS_AVAILABLE = False
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else:
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try:
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import xformers
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import xformers.ops
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XFORMERS_IS_AVAILABLE = True
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try:
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XFORMERS_VERSION = xformers.version.__version__
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print("xformers version:", XFORMERS_VERSION)
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if XFORMERS_VERSION.startswith("0.0.18"):
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print()
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print("WARNING: This version of xformers has a major bug where you will get black images when generating high resolution images.")
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print("Please downgrade or upgrade xformers to a different version.")
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print()
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XFORMERS_ENABLED_VAE = False
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except:
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pass
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except:
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XFORMERS_IS_AVAILABLE = False
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def is_nvidia():
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global cpu_state
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if cpu_state == CPUState.GPU:
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if torch.version.cuda:
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return True
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return False
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ENABLE_PYTORCH_ATTENTION = args.use_pytorch_cross_attention
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VAE_DTYPE = torch.float32
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try:
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if is_nvidia():
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torch_version = torch.version.__version__
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if int(torch_version[0]) >= 2:
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if ENABLE_PYTORCH_ATTENTION == False and XFORMERS_IS_AVAILABLE == False and args.use_split_cross_attention == False and args.use_quad_cross_attention == False:
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ENABLE_PYTORCH_ATTENTION = True
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if torch.cuda.is_bf16_supported():
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VAE_DTYPE = torch.bfloat16
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if is_intel_xpu():
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if args.use_split_cross_attention == False and args.use_quad_cross_attention == False:
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ENABLE_PYTORCH_ATTENTION = True
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except:
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pass
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if is_intel_xpu():
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VAE_DTYPE = torch.bfloat16
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if args.fp16_vae:
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VAE_DTYPE = torch.float16
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elif args.bf16_vae:
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VAE_DTYPE = torch.bfloat16
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elif args.fp32_vae:
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VAE_DTYPE = torch.float32
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if ENABLE_PYTORCH_ATTENTION:
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torch.backends.cuda.enable_math_sdp(True)
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torch.backends.cuda.enable_flash_sdp(True)
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torch.backends.cuda.enable_mem_efficient_sdp(True)
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XFORMERS_IS_AVAILABLE = False
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if args.lowvram:
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set_vram_to = VRAMState.LOW_VRAM
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lowvram_available = True
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elif args.novram:
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set_vram_to = VRAMState.NO_VRAM
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elif args.highvram or args.gpu_only:
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vram_state = VRAMState.HIGH_VRAM
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FORCE_FP32 = False
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FORCE_FP16 = False
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if args.force_fp32:
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print("Forcing FP32, if this improves things please report it.")
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FORCE_FP32 = True
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if args.force_fp16:
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print("Forcing FP16.")
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FORCE_FP16 = True
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if lowvram_available:
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try:
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import accelerate
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if set_vram_to in (VRAMState.LOW_VRAM, VRAMState.NO_VRAM):
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vram_state = set_vram_to
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except Exception as e:
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import traceback
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print(traceback.format_exc())
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print("ERROR: LOW VRAM MODE NEEDS accelerate.")
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lowvram_available = False
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if cpu_state != CPUState.GPU:
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vram_state = VRAMState.DISABLED
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if cpu_state == CPUState.MPS:
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vram_state = VRAMState.SHARED
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print(f"Set vram state to: {vram_state.name}")
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DISABLE_SMART_MEMORY = args.disable_smart_memory
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if DISABLE_SMART_MEMORY:
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print("Disabling smart memory management")
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def get_torch_device_name(device):
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if hasattr(device, 'type'):
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if device.type == "cuda":
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try:
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allocator_backend = torch.cuda.get_allocator_backend()
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except:
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allocator_backend = ""
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return "{} {} : {}".format(device, torch.cuda.get_device_name(device), allocator_backend)
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else:
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return "{}".format(device.type)
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elif is_intel_xpu():
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return "{} {}".format(device, torch.xpu.get_device_name(device))
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else:
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return "CUDA {}: {}".format(device, torch.cuda.get_device_name(device))
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try:
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print("Device:", get_torch_device_name(get_torch_device()))
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except:
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print("Could not pick default device.")
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print("VAE dtype:", VAE_DTYPE)
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current_loaded_models = []
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class LoadedModel:
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def __init__(self, model):
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self.model = model
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self.model_accelerated = False
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self.device = model.load_device
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def model_memory(self):
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return self.model.model_size()
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def model_memory_required(self, device):
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if device == self.model.current_device:
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return 0
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else:
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return self.model_memory()
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def model_load(self, lowvram_model_memory=0):
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patch_model_to = None
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if lowvram_model_memory == 0:
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patch_model_to = self.device
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self.model.model_patches_to(self.device)
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self.model.model_patches_to(self.model.model_dtype())
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try:
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self.real_model = self.model.patch_model(device_to=patch_model_to) #TODO: do something with loras and offloading to CPU
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except Exception as e:
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self.model.unpatch_model(self.model.offload_device)
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self.model_unload()
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raise e
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if lowvram_model_memory > 0:
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print("loading in lowvram mode", lowvram_model_memory/(1024 * 1024))
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device_map = accelerate.infer_auto_device_map(self.real_model, max_memory={0: "{}MiB".format(lowvram_model_memory // (1024 * 1024)), "cpu": "16GiB"})
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accelerate.dispatch_model(self.real_model, device_map=device_map, main_device=self.device)
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self.model_accelerated = True
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if is_intel_xpu() and not args.disable_ipex_optimize:
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self.real_model = torch.xpu.optimize(self.real_model.eval(), inplace=True, auto_kernel_selection=True, graph_mode=True)
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return self.real_model
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def model_unload(self):
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if self.model_accelerated:
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accelerate.hooks.remove_hook_from_submodules(self.real_model)
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self.model_accelerated = False
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self.model.unpatch_model(self.model.offload_device)
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self.model.model_patches_to(self.model.offload_device)
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def __eq__(self, other):
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return self.model is other.model
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def minimum_inference_memory():
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return (1024 * 1024 * 1024)
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def unload_model_clones(model):
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to_unload = []
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for i in range(len(current_loaded_models)):
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if model.is_clone(current_loaded_models[i].model):
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to_unload = [i] + to_unload
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for i in to_unload:
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print("unload clone", i)
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current_loaded_models.pop(i).model_unload()
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def free_memory(memory_required, device, keep_loaded=[]):
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unloaded_model = False
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for i in range(len(current_loaded_models) -1, -1, -1):
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if not DISABLE_SMART_MEMORY:
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if get_free_memory(device) > memory_required:
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break
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shift_model = current_loaded_models[i]
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if shift_model.device == device:
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if shift_model not in keep_loaded:
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m = current_loaded_models.pop(i)
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m.model_unload()
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del m
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unloaded_model = True
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if unloaded_model:
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soft_empty_cache()
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def load_models_gpu(models, memory_required=0):
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global vram_state
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inference_memory = minimum_inference_memory()
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extra_mem = max(inference_memory, memory_required)
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models_to_load = []
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models_already_loaded = []
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for x in models:
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loaded_model = LoadedModel(x)
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if loaded_model in current_loaded_models:
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index = current_loaded_models.index(loaded_model)
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current_loaded_models.insert(0, current_loaded_models.pop(index))
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models_already_loaded.append(loaded_model)
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else:
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models_to_load.append(loaded_model)
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if len(models_to_load) == 0:
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devs = set(map(lambda a: a.device, models_already_loaded))
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for d in devs:
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if d != torch.device("cpu"):
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free_memory(extra_mem, d, models_already_loaded)
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return
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print("loading new")
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total_memory_required = {}
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for loaded_model in models_to_load:
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unload_model_clones(loaded_model.model)
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total_memory_required[loaded_model.device] = total_memory_required.get(loaded_model.device, 0) + loaded_model.model_memory_required(loaded_model.device)
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for device in total_memory_required:
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if device != torch.device("cpu"):
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free_memory(total_memory_required[device] * 1.3 + extra_mem, device, models_already_loaded)
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for loaded_model in models_to_load:
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model = loaded_model.model
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torch_dev = model.load_device
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if is_device_cpu(torch_dev):
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vram_set_state = VRAMState.DISABLED
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else:
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vram_set_state = vram_state
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lowvram_model_memory = 0
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if lowvram_available and (vram_set_state == VRAMState.LOW_VRAM or vram_set_state == VRAMState.NORMAL_VRAM):
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model_size = loaded_model.model_memory_required(torch_dev)
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current_free_mem = get_free_memory(torch_dev)
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lowvram_model_memory = int(max(256 * (1024 * 1024), (current_free_mem - 1024 * (1024 * 1024)) / 1.3 ))
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if model_size > (current_free_mem - inference_memory): #only switch to lowvram if really necessary
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vram_set_state = VRAMState.LOW_VRAM
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else:
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lowvram_model_memory = 0
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if vram_set_state == VRAMState.NO_VRAM:
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lowvram_model_memory = 256 * 1024 * 1024
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cur_loaded_model = loaded_model.model_load(lowvram_model_memory)
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current_loaded_models.insert(0, loaded_model)
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return
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def load_model_gpu(model):
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return load_models_gpu([model])
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def cleanup_models():
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to_delete = []
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for i in range(len(current_loaded_models)):
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print(sys.getrefcount(current_loaded_models[i].model))
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if sys.getrefcount(current_loaded_models[i].model) <= 2:
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to_delete = [i] + to_delete
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for i in to_delete:
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x = current_loaded_models.pop(i)
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x.model_unload()
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del x
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def dtype_size(dtype):
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dtype_size = 4
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if dtype == torch.float16 or dtype == torch.bfloat16:
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dtype_size = 2
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return dtype_size
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def unet_offload_device():
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if vram_state == VRAMState.HIGH_VRAM:
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return get_torch_device()
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else:
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return torch.device("cpu")
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def unet_inital_load_device(parameters, dtype):
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torch_dev = get_torch_device()
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if vram_state == VRAMState.HIGH_VRAM:
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return torch_dev
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cpu_dev = torch.device("cpu")
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if DISABLE_SMART_MEMORY:
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return cpu_dev
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model_size = dtype_size(dtype) * parameters
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mem_dev = get_free_memory(torch_dev)
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mem_cpu = get_free_memory(cpu_dev)
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if mem_dev > mem_cpu and model_size < mem_dev:
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return torch_dev
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else:
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return cpu_dev
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def text_encoder_offload_device():
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if args.gpu_only:
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return get_torch_device()
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else:
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return torch.device("cpu")
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def text_encoder_device():
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if args.gpu_only:
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return get_torch_device()
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elif vram_state == VRAMState.HIGH_VRAM or vram_state == VRAMState.NORMAL_VRAM:
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if is_intel_xpu():
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return torch.device("cpu")
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if should_use_fp16(prioritize_performance=False):
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return get_torch_device()
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else:
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return torch.device("cpu")
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else:
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return torch.device("cpu")
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def vae_device():
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return get_torch_device()
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def vae_offload_device():
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if args.gpu_only:
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return get_torch_device()
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else:
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return torch.device("cpu")
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def vae_dtype():
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global VAE_DTYPE
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return VAE_DTYPE
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def get_autocast_device(dev):
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if hasattr(dev, 'type'):
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return dev.type
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return "cuda"
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def cast_to_device(tensor, device, dtype, copy=False):
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device_supports_cast = False
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if tensor.dtype == torch.float32 or tensor.dtype == torch.float16:
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device_supports_cast = True
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elif tensor.dtype == torch.bfloat16:
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if hasattr(device, 'type') and device.type.startswith("cuda"):
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device_supports_cast = True
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if device_supports_cast:
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if copy:
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if tensor.device == device:
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return tensor.to(dtype, copy=copy)
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return tensor.to(device, copy=copy).to(dtype)
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else:
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return tensor.to(device).to(dtype)
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else:
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return tensor.to(dtype).to(device, copy=copy)
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def xformers_enabled():
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global directml_enabled
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global cpu_state
|
|
if cpu_state != CPUState.GPU:
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|
return False
|
|
if is_intel_xpu():
|
|
return False
|
|
if directml_enabled:
|
|
return False
|
|
return XFORMERS_IS_AVAILABLE
|
|
|
|
|
|
def xformers_enabled_vae():
|
|
enabled = xformers_enabled()
|
|
if not enabled:
|
|
return False
|
|
|
|
return XFORMERS_ENABLED_VAE
|
|
|
|
def pytorch_attention_enabled():
|
|
global ENABLE_PYTORCH_ATTENTION
|
|
return ENABLE_PYTORCH_ATTENTION
|
|
|
|
def pytorch_attention_flash_attention():
|
|
global ENABLE_PYTORCH_ATTENTION
|
|
if ENABLE_PYTORCH_ATTENTION:
|
|
#TODO: more reliable way of checking for flash attention?
|
|
if is_nvidia(): #pytorch flash attention only works on Nvidia
|
|
return True
|
|
return False
|
|
|
|
def get_free_memory(dev=None, torch_free_too=False):
|
|
global directml_enabled
|
|
if dev is None:
|
|
dev = get_torch_device()
|
|
|
|
if hasattr(dev, 'type') and (dev.type == 'cpu' or dev.type == 'mps'):
|
|
mem_free_total = psutil.virtual_memory().available
|
|
mem_free_torch = mem_free_total
|
|
else:
|
|
if directml_enabled:
|
|
mem_free_total = 1024 * 1024 * 1024 #TODO
|
|
mem_free_torch = mem_free_total
|
|
elif is_intel_xpu():
|
|
stats = torch.xpu.memory_stats(dev)
|
|
mem_active = stats['active_bytes.all.current']
|
|
mem_allocated = stats['allocated_bytes.all.current']
|
|
mem_reserved = stats['reserved_bytes.all.current']
|
|
mem_free_torch = mem_reserved - mem_active
|
|
mem_free_total = torch.xpu.get_device_properties(dev).total_memory - mem_allocated
|
|
else:
|
|
stats = torch.cuda.memory_stats(dev)
|
|
mem_active = stats['active_bytes.all.current']
|
|
mem_reserved = stats['reserved_bytes.all.current']
|
|
mem_free_cuda, _ = torch.cuda.mem_get_info(dev)
|
|
mem_free_torch = mem_reserved - mem_active
|
|
mem_free_total = mem_free_cuda + mem_free_torch
|
|
|
|
if torch_free_too:
|
|
return (mem_free_total, mem_free_torch)
|
|
else:
|
|
return mem_free_total
|
|
|
|
def batch_area_memory(area):
|
|
if xformers_enabled() or pytorch_attention_flash_attention():
|
|
#TODO: these formulas are copied from maximum_batch_area below
|
|
return (area / 20) * (1024 * 1024)
|
|
else:
|
|
return (((area * 0.6) / 0.9) + 1024) * (1024 * 1024)
|
|
|
|
def maximum_batch_area():
|
|
global vram_state
|
|
if vram_state == VRAMState.NO_VRAM:
|
|
return 0
|
|
|
|
memory_free = get_free_memory() / (1024 * 1024)
|
|
if xformers_enabled() or pytorch_attention_flash_attention():
|
|
#TODO: this needs to be tweaked
|
|
area = 20 * memory_free
|
|
else:
|
|
#TODO: this formula is because AMD sucks and has memory management issues which might be fixed in the future
|
|
area = ((memory_free - 1024) * 0.9) / (0.6)
|
|
return int(max(area, 0))
|
|
|
|
def cpu_mode():
|
|
global cpu_state
|
|
return cpu_state == CPUState.CPU
|
|
|
|
def mps_mode():
|
|
global cpu_state
|
|
return cpu_state == CPUState.MPS
|
|
|
|
def is_device_cpu(device):
|
|
if hasattr(device, 'type'):
|
|
if (device.type == 'cpu'):
|
|
return True
|
|
return False
|
|
|
|
def is_device_mps(device):
|
|
if hasattr(device, 'type'):
|
|
if (device.type == 'mps'):
|
|
return True
|
|
return False
|
|
|
|
def should_use_fp16(device=None, model_params=0, prioritize_performance=True):
|
|
global directml_enabled
|
|
|
|
if device is not None:
|
|
if is_device_cpu(device):
|
|
return False
|
|
|
|
if FORCE_FP16:
|
|
return True
|
|
|
|
if device is not None: #TODO
|
|
if is_device_mps(device):
|
|
return False
|
|
|
|
if FORCE_FP32:
|
|
return False
|
|
|
|
if directml_enabled:
|
|
return False
|
|
|
|
if cpu_mode() or mps_mode():
|
|
return False #TODO ?
|
|
|
|
if is_intel_xpu():
|
|
return True
|
|
|
|
if torch.cuda.is_bf16_supported():
|
|
return True
|
|
|
|
props = torch.cuda.get_device_properties("cuda")
|
|
if props.major < 6:
|
|
return False
|
|
|
|
fp16_works = False
|
|
#FP16 is confirmed working on a 1080 (GP104) but it's a bit slower than FP32 so it should only be enabled
|
|
#when the model doesn't actually fit on the card
|
|
#TODO: actually test if GP106 and others have the same type of behavior
|
|
nvidia_10_series = ["1080", "1070", "titan x", "p3000", "p3200", "p4000", "p4200", "p5000", "p5200", "p6000", "1060", "1050"]
|
|
for x in nvidia_10_series:
|
|
if x in props.name.lower():
|
|
fp16_works = True
|
|
|
|
if fp16_works:
|
|
free_model_memory = (get_free_memory() * 0.9 - minimum_inference_memory())
|
|
if (not prioritize_performance) or model_params * 4 > free_model_memory:
|
|
return True
|
|
|
|
if props.major < 7:
|
|
return False
|
|
|
|
#FP16 is just broken on these cards
|
|
nvidia_16_series = ["1660", "1650", "1630", "T500", "T550", "T600", "MX550", "MX450", "CMP 30HX"]
|
|
for x in nvidia_16_series:
|
|
if x in props.name:
|
|
return False
|
|
|
|
return True
|
|
|
|
def soft_empty_cache(force=False):
|
|
global cpu_state
|
|
if cpu_state == CPUState.MPS:
|
|
torch.mps.empty_cache()
|
|
elif is_intel_xpu():
|
|
torch.xpu.empty_cache()
|
|
elif torch.cuda.is_available():
|
|
if force or is_nvidia(): #This seems to make things worse on ROCm so I only do it for cuda
|
|
torch.cuda.empty_cache()
|
|
torch.cuda.ipc_collect()
|
|
|
|
def resolve_lowvram_weight(weight, model, key):
|
|
if weight.device == torch.device("meta"): #lowvram NOTE: this depends on the inner working of the accelerate library so it might break.
|
|
key_split = key.split('.') # I have no idea why they don't just leave the weight there instead of using the meta device.
|
|
op = comfy.utils.get_attr(model, '.'.join(key_split[:-1]))
|
|
weight = op._hf_hook.weights_map[key_split[-1]]
|
|
return weight
|
|
|
|
#TODO: might be cleaner to put this somewhere else
|
|
import threading
|
|
|
|
class InterruptProcessingException(Exception):
|
|
pass
|
|
|
|
interrupt_processing_mutex = threading.RLock()
|
|
|
|
interrupt_processing = False
|
|
def interrupt_current_processing(value=True):
|
|
global interrupt_processing
|
|
global interrupt_processing_mutex
|
|
with interrupt_processing_mutex:
|
|
interrupt_processing = value
|
|
|
|
def processing_interrupted():
|
|
global interrupt_processing
|
|
global interrupt_processing_mutex
|
|
with interrupt_processing_mutex:
|
|
return interrupt_processing
|
|
|
|
def throw_exception_if_processing_interrupted():
|
|
global interrupt_processing
|
|
global interrupt_processing_mutex
|
|
with interrupt_processing_mutex:
|
|
if interrupt_processing:
|
|
interrupt_processing = False
|
|
raise InterruptProcessingException()
|