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@@ -1,6 +1,8 @@
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import os
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import sys
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+from typing import List
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+import fire
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import torch
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import torch.nn as nn
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import bitsandbytes as bnb
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@@ -19,61 +21,173 @@ from peft import (
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)
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-# optimized for RTX 4090. for larger GPUs, increase some of these?
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-MICRO_BATCH_SIZE = 4 # this could actually be 5 but i like powers of 2
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-BATCH_SIZE = 128
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-GRADIENT_ACCUMULATION_STEPS = BATCH_SIZE // MICRO_BATCH_SIZE
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-EPOCHS = 3
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-LEARNING_RATE = 3e-4
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-CUTOFF_LEN = 512
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-LORA_R = 8
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-LORA_ALPHA = 16
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-LORA_DROPOUT = 0.05
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-VAL_SET_SIZE = 2000
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-TARGET_MODULES = [
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- "q_proj",
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- "v_proj",
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-]
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-DATA_PATH = "alpaca_data_cleaned.json"
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-OUTPUT_DIR = "lora-alpaca"
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-BASE_MODEL = None
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-assert (
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- BASE_MODEL
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-), "Please specify a BASE_MODEL in the script, e.g. 'decapoda-research/llama-7b-hf'"
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-TRAIN_ON_INPUTS = True
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-GROUP_BY_LENGTH = True # faster, but produces an odd training loss curve
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-
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-device_map = "auto"
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-world_size = int(os.environ.get("WORLD_SIZE", 1))
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-ddp = world_size != 1
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-if ddp:
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- device_map = {"": int(os.environ.get("LOCAL_RANK") or 0)}
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- GRADIENT_ACCUMULATION_STEPS = GRADIENT_ACCUMULATION_STEPS // world_size
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-
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-model = LlamaForCausalLM.from_pretrained(
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- BASE_MODEL,
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- load_in_8bit=True,
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- device_map=device_map,
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-)
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+def train(
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+ # model/data params
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+ base_model: str = "", # the only required argument
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+ data_path: str = "./alpaca_data_cleaned.json",
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+ output_dir: str = "./lora-alpaca",
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+ # training hyperparams
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+ batch_size: int = 128,
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+ micro_batch_size: int = 4,
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+ num_epochs: int = 3,
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+ learning_rate: float = 3e-4,
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+ cutoff_len: int = 512,
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+ val_set_size: int = 2000,
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+ # lora hyperparams
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+ lora_r: int = 8,
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+ lora_alpha: int = 16,
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+ lora_dropout: float = 0.05,
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+ lora_target_modules: List[str] = [
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+ "q_proj",
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+ "v_proj",
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+ ],
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+ # llm hyperparams
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+ train_on_inputs: bool = True, # if False, masks out inputs in loss
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+ group_by_length: bool = True, # faster, but produces an odd training loss curve
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+):
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+ print(
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+ f"Training Alpaca-LoRA model with params:\n"
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+ f"base_model: {base_model}\n"
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+ f"data_path: {data_path}\n"
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+ f"output_dir: {output_dir}\n"
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+ f"batch_size: {batch_size}\n"
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+ f"micro_batch_size: {micro_batch_size}\n"
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+ f"num_epochs: {num_epochs}\n"
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+ f"learning_rate: {learning_rate}\n"
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+ f"cutoff_len: {cutoff_len}\n"
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+ f"val_set_size: {val_set_size}\n"
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+ f"lora_r: {lora_r}\n"
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+ f"lora_alpha: {lora_alpha}\n"
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+ f"lora_dropout: {lora_dropout}\n"
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+ f"lora_target_modules: {lora_target_modules}\n"
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+ f"train_on_inputs: {train_on_inputs}\n"
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+ f"group_by_length: {group_by_length}\n"
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+ )
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+ assert (
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+ base_model
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+ ), "Please specify a --base_model, e.g. --base_model='decapoda-research/llama-7b-hf'"
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+ gradient_accumulation_steps = batch_size // micro_batch_size
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+
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+ device_map = "auto"
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+ world_size = int(os.environ.get("WORLD_SIZE", 1))
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+ ddp = world_size != 1
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+ if ddp:
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+ device_map = {"": int(os.environ.get("LOCAL_RANK") or 0)}
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+ gradient_accumulation_steps = gradient_accumulation_steps // world_size
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+
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+ model = LlamaForCausalLM.from_pretrained(
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+ base_model,
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+ load_in_8bit=True,
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+ device_map=device_map,
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+ )
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+
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+ tokenizer = LlamaTokenizer.from_pretrained(base_model)
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+
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+ tokenizer.pad_token_id = 0 # unk. we want this to be different from the eos token
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+ tokenizer.padding_side = "left" # Allow batched inference
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+
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+ def tokenize(prompt, add_eos_token=True):
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+ # there's probably a way to do this with the tokenizer settings
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+ # but again, gotta move fast
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+ result = tokenizer(
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+ prompt,
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+ truncation=True,
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+ max_length=cutoff_len,
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+ padding=False,
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+ return_tensors=None,
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+ )
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+ if (
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+ result["input_ids"][-1] != tokenizer.eos_token_id
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+ and len(result["input_ids"]) < cutoff_len
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+ and add_eos_token
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+ ):
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+ result["input_ids"].append(tokenizer.eos_token_id)
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+ result["attention_mask"].append(1)
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+
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+ result["labels"] = result["input_ids"].copy()
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+
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+ return result
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+
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+ def generate_and_tokenize_prompt(data_point):
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+ full_prompt = generate_prompt(data_point)
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+ tokenized_full_prompt = tokenize(full_prompt)
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+ if not train_on_inputs:
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+ user_prompt = generate_prompt({**data_point, "output": ""})
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+ tokenized_user_prompt = tokenize(user_prompt, add_eos_token=False)
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+ user_prompt_len = len(tokenized_user_prompt["input_ids"])
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+
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+ tokenized_full_prompt["labels"] = [
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+ -100
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+ ] * user_prompt_len + tokenized_full_prompt["labels"][
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+ user_prompt_len:
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+ ] # could be sped up, probably
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+ return tokenized_full_prompt
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+
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+ model = prepare_model_for_int8_training(model)
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+
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+ config = LoraConfig(
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+ r=lora_r,
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+ lora_alpha=lora_alpha,
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+ target_modules=lora_target_modules,
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+ lora_dropout=lora_dropout,
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+ bias="none",
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+ task_type="CAUSAL_LM",
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+ )
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+ model = get_peft_model(model, config)
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-tokenizer = LlamaTokenizer.from_pretrained(BASE_MODEL)
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+ data = load_dataset("json", data_files=data_path)
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-tokenizer.pad_token_id = 0 # unk. we want this to be different from the eos token
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-tokenizer.padding_side = "left" # Allow batched inference
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+ if val_set_size > 0:
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+ train_val = data["train"].train_test_split(
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+ test_size=val_set_size, shuffle=True, seed=42
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+ )
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+ train_data = train_val["train"].shuffle().map(generate_and_tokenize_prompt)
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+ val_data = train_val["test"].shuffle().map(generate_and_tokenize_prompt)
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+ else:
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+ train_data = data["train"].shuffle().map(generate_and_tokenize_prompt)
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+ val_data = None
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+
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+ trainer = transformers.Trainer(
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+ model=model,
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+ train_dataset=train_data,
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+ eval_dataset=val_data,
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+ args=transformers.TrainingArguments(
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+ per_device_train_batch_size=micro_batch_size,
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+ gradient_accumulation_steps=gradient_accumulation_steps,
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+ warmup_steps=100,
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+ num_train_epochs=num_epochs,
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+ learning_rate=learning_rate,
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+ fp16=True,
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+ logging_steps=10,
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+ evaluation_strategy="steps" if val_set_size > 0 else "no",
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+ save_strategy="steps",
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+ eval_steps=200 if val_set_size > 0 else None,
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+ save_steps=200,
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+ output_dir=output_dir,
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+ save_total_limit=3,
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+ load_best_model_at_end=True if val_set_size > 0 else False,
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+ ddp_find_unused_parameters=False if ddp else None,
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+ group_by_length=group_by_length,
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+ ),
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+ data_collator=transformers.DataCollatorForSeq2Seq(
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+ tokenizer, pad_to_multiple_of=8, return_tensors="pt", padding=True
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+ ),
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+ )
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+ model.config.use_cache = False
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-model = prepare_model_for_int8_training(model)
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+ old_state_dict = model.state_dict
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+ model.state_dict = (
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+ lambda self, *_, **__: get_peft_model_state_dict(self, old_state_dict())
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+ ).__get__(model, type(model))
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-config = LoraConfig(
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- r=LORA_R,
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- lora_alpha=LORA_ALPHA,
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- target_modules=TARGET_MODULES,
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- lora_dropout=LORA_DROPOUT,
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- bias="none",
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- task_type="CAUSAL_LM",
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-)
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-model = get_peft_model(model, config)
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+ if torch.__version__ >= "2" and sys.platform != "win32":
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+ model = torch.compile(model)
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+
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+ trainer.train()
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-data = load_dataset("json", data_files=DATA_PATH)
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+ model.save_pretrained(output_dir)
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+
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+ print("\n If there's a warning about missing keys above, please disregard :)")
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def generate_prompt(data_point):
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@@ -99,93 +213,5 @@ def generate_prompt(data_point):
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{data_point["output"]}"""
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-def tokenize(prompt, add_eos_token=True):
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- # there's probably a way to do this with the tokenizer settings
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- # but again, gotta move fast
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- result = tokenizer(
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- prompt,
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- truncation=True,
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- max_length=CUTOFF_LEN,
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- padding=False,
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- return_tensors=None,
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- )
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- if (
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- result["input_ids"][-1] != tokenizer.eos_token_id
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- and len(result["input_ids"]) < CUTOFF_LEN
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- and add_eos_token
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- ):
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- result["input_ids"].append(tokenizer.eos_token_id)
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- result["attention_mask"].append(1)
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-
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- result["labels"] = result["input_ids"].copy()
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-
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- return result
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-
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-
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-def generate_and_tokenize_prompt(data_point):
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- full_prompt = generate_prompt(data_point)
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- tokenized_full_prompt = tokenize(full_prompt)
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- if not TRAIN_ON_INPUTS:
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- user_prompt = generate_prompt({**data_point, "output": ""})
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- tokenized_user_prompt = tokenize(user_prompt, add_eos_token=False)
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- user_prompt_len = len(tokenized_user_prompt["input_ids"])
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-
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- tokenized_full_prompt["labels"] = [
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- -100
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- ] * user_prompt_len + tokenized_full_prompt["labels"][
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- user_prompt_len:
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- ] # could be sped up, probably
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- return tokenized_full_prompt
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-
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-
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-if VAL_SET_SIZE > 0:
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- train_val = data["train"].train_test_split(
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- test_size=VAL_SET_SIZE, shuffle=True, seed=42
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- )
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- train_data = train_val["train"].shuffle().map(generate_and_tokenize_prompt)
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- val_data = train_val["test"].shuffle().map(generate_and_tokenize_prompt)
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-else:
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- train_data = data["train"].shuffle().map(generate_and_tokenize_prompt)
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- val_data = None
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-
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-trainer = transformers.Trainer(
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- model=model,
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- train_dataset=train_data,
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- eval_dataset=val_data,
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- args=transformers.TrainingArguments(
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- per_device_train_batch_size=MICRO_BATCH_SIZE,
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- gradient_accumulation_steps=GRADIENT_ACCUMULATION_STEPS,
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- warmup_steps=100,
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- num_train_epochs=EPOCHS,
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- learning_rate=LEARNING_RATE,
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- fp16=True,
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- logging_steps=10,
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- evaluation_strategy="steps" if VAL_SET_SIZE > 0 else "no",
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- save_strategy="steps",
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- eval_steps=200 if VAL_SET_SIZE > 0 else None,
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- save_steps=200,
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- output_dir=OUTPUT_DIR,
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- save_total_limit=3,
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- load_best_model_at_end=True if VAL_SET_SIZE > 0 else False,
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- ddp_find_unused_parameters=False if ddp else None,
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- group_by_length=GROUP_BY_LENGTH,
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- ),
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- data_collator=transformers.DataCollatorForSeq2Seq(
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- tokenizer, pad_to_multiple_of=8, return_tensors="pt", padding=True
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- ),
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-)
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-model.config.use_cache = False
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-
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-old_state_dict = model.state_dict
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-model.state_dict = (
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- lambda self, *_, **__: get_peft_model_state_dict(self, old_state_dict())
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-).__get__(model, type(model))
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-
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-if torch.__version__ >= "2" and sys.platform != "win32":
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- model = torch.compile(model)
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-
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-trainer.train()
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-
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-model.save_pretrained(OUTPUT_DIR)
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-
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-print("\n If there's a warning about missing keys above, please disregard :)")
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+if __name__ == "__main__":
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+ fire.Fire(train)
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