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July 25, 2022 16:11
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Convert HuggingFace GPT-J model to FasterTransformers
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# Copyright (c) 2021-2022, NVIDIA CORPORATION. All rights reserved. | |
# Modified by Brendan Dolan-Gavitt, 2022 | |
# | |
# Licensed under the Apache License, Version 2.0 (the "License"); | |
# you may not use this file except in compliance with the License. | |
# You may obtain a copy of the License at | |
# | |
# http://www.apache.org/licenses/LICENSE-2.0 | |
# | |
# Unless required by applicable law or agreed to in writing, software | |
# distributed under the License is distributed on an "AS IS" BASIS, | |
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
# See the License for the specific language governing permissions and | |
# limitations under the License. | |
import argparse | |
import configparser | |
import multiprocessing | |
import numpy as np | |
from pathlib import Path | |
import torch | |
import os | |
import sys | |
from transformers import GPTJForCausalLM | |
dir_path = os.path.dirname(os.path.realpath(__file__)) | |
sys.path.append(dir_path + "/../../../..") | |
sys.path.append(dir_path) | |
def get_weight_data_type(data_type): | |
if data_type == "fp32": | |
return np.float32 | |
elif data_type == "fp16": | |
return np.float16 | |
else: | |
assert False, f"Invalid weight data type {data_type}" | |
def split_and_convert_process(i, saved_dir,factor,key,args, val): | |
if key.find("input_layernorm.weight") != -1 or key.find("input_layernorm.bias") != -1 or \ | |
key.find("attention.dense.bias") != -1 or key.find("post_attention_layernorm.weight") != -1 or \ | |
key.find("post_attention_layernorm.bias") != -1 or key.find("mlp.dense_4h_to_h.bias") != -1 or \ | |
key.find("final_layernorm.weight") != -1 or key.find("final_layernorm.bias") != -1: | |
# shared weights, only need to convert the weights of rank 0 | |
if i == 0: | |
saved_path = saved_dir + "/model." + key + ".bin" | |
val.tofile(saved_path) | |
elif key.find("attention.dense.weight") != -1 or key.find("mlp.dense_4h_to_h.weight") != -1: | |
split_vals = np.split(val, factor, axis=0) | |
for j in range(factor): | |
saved_path = saved_dir + "/model." + key + ".%d.bin" % (i * factor + j) | |
split_vals[j].tofile(saved_path) | |
elif key.find("mlp.dense_h_to_4h.weight") != -1 or key.find("mlp.dense_h_to_4h.bias") != -1: | |
split_vals = np.split(val, factor, axis=-1) | |
for j in range(factor): | |
saved_path = saved_dir + "/model." + key + ".%d.bin" % (i * factor + j) | |
split_vals[j].tofile(saved_path) | |
elif key.find("attention.query_key_value.weight") != -1: | |
split_vals = np.split(val, factor, axis=-1) | |
for j in range(factor): | |
saved_path = saved_dir + "/model." + key + ".%d.bin" % (i * factor + j) | |
split_vals[j].tofile(saved_path) | |
else: | |
print("[ERROR] cannot find key '{}'".format(key)) | |
def split_and_convert(args): | |
saved_dir = args.saved_dir + "/%d-gpu/" % args.infer_gpu_num | |
if(os.path.exists(saved_dir) == False): | |
os.makedirs(saved_dir) | |
ckpt_name = args.in_file | |
t_gpu_num = args.trained_gpu_num | |
i_gpu_num = args.infer_gpu_num | |
assert(i_gpu_num % t_gpu_num == 0) | |
factor = (int)(i_gpu_num / t_gpu_num) | |
model = GPTJForCausalLM.from_pretrained(args.in_file) | |
try: | |
config = configparser.ConfigParser() | |
config["gpt"] = {} | |
for key in vars(args): | |
config["gpt"][key] = f"{vars(args)[key]}" | |
for k, v in vars(model.config).items(): | |
config["gpt"][k] = f"{v}" | |
config["gpt"]["weight_data_type"] = args.weight_data_type | |
with open((Path(saved_dir) / f"config.ini").as_posix(), 'w') as configfile: | |
config.write(configfile) | |
except: | |
print(f"Fail to save the config in config.ini.") | |
np_weight_data_type = get_weight_data_type(args.weight_data_type) | |
huggingface_model_name_pattern = [ | |
"ln_1.bias", | |
"ln_1.weight", | |
"attn.q_proj.weight", | |
"attn.out_proj.weight", | |
"mlp.fc_in.bias", | |
"mlp.fc_in.weight", | |
"mlp.fc_out.bias", | |
"mlp.fc_out.weight", | |
] | |
ft_model_name_pattern = [ | |
"input_layernorm.bias", | |
"input_layernorm.weight", | |
"attention.query_key_value.weight", | |
"attention.dense.weight", | |
"mlp.dense_h_to_4h.bias", | |
"mlp.dense_h_to_4h.weight", | |
"mlp.dense_4h_to_h.bias", | |
"mlp.dense_4h_to_h.weight", | |
] | |
torch.multiprocessing.set_start_method("spawn") | |
pool = multiprocessing.Pool(args.processes) | |
for name, param in model.named_parameters(): | |
if name.find("weight") == -1 and name.find("bias") == -1: | |
continue | |
print(name) | |
if name == 'transformer.wte.weight': | |
param.detach().cpu().numpy().astype(np_weight_data_type).tofile(saved_dir + "model.wte.bin") | |
elif name == 'transformer.ln_f.bias': | |
param.detach().cpu().numpy().astype(np_weight_data_type).tofile(saved_dir + "model.final_layernorm.bias.bin") | |
elif name == 'transformer.ln_f.weight': | |
param.detach().cpu().numpy().astype(np_weight_data_type).tofile(saved_dir + "model.final_layernorm.weight.bin") | |
elif name == 'lm_head.weight': | |
param.detach().cpu().numpy().astype(np_weight_data_type).tofile(saved_dir + "model.lm_head.weight.bin") | |
elif name == 'lm_head.bias': | |
param.detach().cpu().numpy().astype(np_weight_data_type).tofile(saved_dir + "model.lm_head.bias.bin") | |
else: | |
for i in range(len(huggingface_model_name_pattern)): | |
if name.find(huggingface_model_name_pattern[i]) != -1: | |
# Special case for QKV weights | |
if name.find("attn.q_proj.weight") != -1: | |
layer = name.split('.')[2] | |
base_k = f'transformer.h.{layer}.' | |
w = model.state_dict() | |
QKV_w = torch.stack([ | |
w[base_k + "attn.q_proj.weight"], | |
w[base_k + "attn.k_proj.weight"], | |
w[base_k + "attn.v_proj.weight"], | |
]) # [qkv, n_heads * dim_head, latent_space] | |
QKV_w = QKV_w.permute(2, 0, 1) | |
weights = QKV_w.detach().cpu().numpy().astype(np_weight_data_type) | |
else: | |
weights = param.detach().cpu().numpy().astype(np_weight_data_type) | |
# Some weights need to be transposed | |
if name.find("mlp.fc_in.weight") != -1 or \ | |
name.find("mlp.fc_out.weight") != -1 or \ | |
name.find("attn.out_proj.weight") != -1: | |
weights = weights.T | |
new_name = name.replace("transformer.h.", "layers.").replace(huggingface_model_name_pattern[i], ft_model_name_pattern[i]) | |
pool.starmap(split_and_convert_process, | |
[(0, saved_dir, factor, new_name, args, | |
weights)], ) | |
pool.close() | |
pool.join() | |
if __name__ == "__main__": | |
parser = argparse.ArgumentParser(formatter_class=argparse.RawTextHelpFormatter) | |
parser.add_argument('-saved_dir', '-o', type=str, help='file name of output file', required=True) | |
parser.add_argument('-in_file', '-i', type=str, help='HF model name or directory', required=True) | |
parser.add_argument('-trained_gpu_num', '-t_g', type=int, help='How many gpus for training', default=1) | |
parser.add_argument('-infer_gpu_num', '-i_g', type=int, help='How many gpus for inference', required=True) | |
parser.add_argument("-processes", "-p", type=int, help="How many processes to spawn for conversion (default: 4)", default=4) | |
parser.add_argument("-weight_data_type", type=str, default="fp32", choices=["fp32", "fp16"], help="output weight data type") | |
args = parser.parse_args() | |
print("\n=============== Argument ===============") | |
for key in vars(args): | |
print("{}: {}".format(key, vars(args)[key])) | |
print("========================================") | |
split_and_convert(args) |
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