stable-diffusion-webui/modules/sd_hijack_checkpoint.py

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from torch.utils.checkpoint import checkpoint
import ldm.modules.attention
import ldm.modules.diffusionmodules.openaimodel
def BasicTransformerBlock_forward(self, x, context=None):
return checkpoint(self._forward, x, context)
def AttentionBlock_forward(self, x):
return checkpoint(self._forward, x)
def ResBlock_forward(self, x, emb):
return checkpoint(self._forward, x, emb)
stored = []
def add():
if len(stored) != 0:
return
stored.extend([
ldm.modules.attention.BasicTransformerBlock.forward,
ldm.modules.diffusionmodules.openaimodel.ResBlock.forward,
ldm.modules.diffusionmodules.openaimodel.AttentionBlock.forward
])
ldm.modules.attention.BasicTransformerBlock.forward = BasicTransformerBlock_forward
ldm.modules.diffusionmodules.openaimodel.ResBlock.forward = ResBlock_forward
ldm.modules.diffusionmodules.openaimodel.AttentionBlock.forward = AttentionBlock_forward
def remove():
if len(stored) == 0:
return
ldm.modules.attention.BasicTransformerBlock.forward = stored[0]
ldm.modules.diffusionmodules.openaimodel.ResBlock.forward = stored[1]
ldm.modules.diffusionmodules.openaimodel.AttentionBlock.forward = stored[2]
stored.clear()