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Add PagedAdamW32bit #900

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Oct 29, 2023
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Add PagedAdamW32bit #900

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18 changes: 16 additions & 2 deletions library/train_util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2649,7 +2649,7 @@ def add_optimizer_arguments(parser: argparse.ArgumentParser):
"--optimizer_type",
type=str,
default="",
help="Optimizer to use / オプティマイザの種類: AdamW (default), AdamW8bit, PagedAdamW8bit, Lion8bit, PagedLion8bit, Lion, SGDNesterov, SGDNesterov8bit, DAdaptation(DAdaptAdamPreprint), DAdaptAdaGrad, DAdaptAdam, DAdaptAdan, DAdaptAdanIP, DAdaptLion, DAdaptSGD, AdaFactor",
help="Optimizer to use / オプティマイザの種類: AdamW (default), AdamW8bit, PagedAdamW8bit, PagedAdamW32bit, Lion8bit, PagedLion8bit, Lion, SGDNesterov, SGDNesterov8bit, DAdaptation(DAdaptAdamPreprint), DAdaptAdaGrad, DAdaptAdam, DAdaptAdan, DAdaptAdanIP, DAdaptLion, DAdaptSGD, AdaFactor",
)

# backward compatibility
Expand Down Expand Up @@ -3359,7 +3359,7 @@ def task():


def get_optimizer(args, trainable_params):
# "Optimizer to use: AdamW, AdamW8bit, Lion, SGDNesterov, SGDNesterov8bit, PagedAdamW8bit, Lion8bit, PagedLion8bit, DAdaptation(DAdaptAdamPreprint), DAdaptAdaGrad, DAdaptAdam, DAdaptAdan, DAdaptAdanIP, DAdaptLion, DAdaptSGD, Adafactor"
# "Optimizer to use: AdamW, AdamW8bit, Lion, SGDNesterov, SGDNesterov8bit, PagedAdamW8bit, PagedAdamW32bit, Lion8bit, PagedLion8bit, DAdaptation(DAdaptAdamPreprint), DAdaptAdaGrad, DAdaptAdam, DAdaptAdan, DAdaptAdanIP, DAdaptLion, DAdaptSGD, Adafactor"

optimizer_type = args.optimizer_type
if args.use_8bit_adam:
Expand Down Expand Up @@ -3463,6 +3463,20 @@ def get_optimizer(args, trainable_params):

optimizer = optimizer_class(trainable_params, lr=lr, **optimizer_kwargs)

elif optimizer_type == "PagedAdamW32bit".lower():
print(f"use 32-bit PagedAdamW optimizer | {optimizer_kwargs}")
try:
import bitsandbytes as bnb
except ImportError:
raise ImportError("No bitsandbytes / bitsandbytesがインストールされていないようです")
try:
optimizer_class = bnb.optim.PagedAdamW32bit
except AttributeError:
raise AttributeError(
"No PagedAdamW32bit. The version of bitsandbytes installed seems to be old. Please install 0.39.0 or later. / PagedAdamW32bitが定義されていません。インストールされているbitsandbytesのバージョンが古いようです。0.39.0以上をインストールしてください"
)
optimizer = optimizer_class(trainable_params, lr=lr, **optimizer_kwargs)

elif optimizer_type == "SGDNesterov".lower():
print(f"use SGD with Nesterov optimizer | {optimizer_kwargs}")
if "momentum" not in optimizer_kwargs:
Expand Down