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option to convert VAE to bfloat16 (implementation of #9295)

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AUTOMATIC1111
2024-01-01 16:28:58 +03:00
parent 0743ee9b3e
commit ac0ecf3b4b
2 changed files with 19 additions and 5 deletions
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23
modules/processing.py
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@@ -628,20 +628,33 @@ def decode_latent_batch(model, batch, target_device=None, check_for_nans=False):
sample = decode_first_stage(model, batch[i:i + 1])[0]
if check_for_nans:
try:
devices.test_for_nans(sample, "vae")
except devices.NansException as e:
if devices.dtype_vae == torch.float32 or not shared.opts.auto_vae_precision:
if shared.opts.auto_vae_precision_bfloat16:
autofix_dtype = torch.bfloat16
autofix_dtype_text = "bfloat16"
autofix_dtype_setting = "Automatically convert VAE to bfloat16"
autofix_dtype_comment = ""
elif shared.opts.auto_vae_precision:
autofix_dtype = torch.float32
autofix_dtype_text = "32-bit float"
autofix_dtype_setting = "Automatically revert VAE to 32-bit floats"
autofix_dtype_comment = "\nTo always start with 32-bit VAE, use --no-half-vae commandline flag."
else:
raise e
if devices.dtype_vae == autofix_dtype:
raise e
errors.print_error_explanation(
"A tensor with all NaNs was produced in VAE.\n"
"Web UI will now convert VAE into 32-bit float and retry.\n"
"To disable this behavior, disable the 'Automatically revert VAE to 32-bit floats' setting.\n"
"To always start with 32-bit VAE, use --no-half-vae commandline flag."
f"Web UI will now convert VAE into {autofix_dtype_text} and retry.\n"
f"To disable this behavior, disable the '{autofix_dtype_setting}' setting.{autofix_dtype_comment}"
)
devices.dtype_vae = torch.float32
devices.dtype_vae = autofix_dtype
model.first_stage_model.to(devices.dtype_vae)
batch = batch.to(devices.dtype_vae)