mirror of https://github.com/hpcaitech/ColossalAI
426 lines
16 KiB
Python
426 lines
16 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""
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Continual Pre-training/Supervised fine-tuning of Colossal-LLaMA-2 developed by Colossal-AI Team
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"""
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import argparse
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import json
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import os
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import resource
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from contextlib import nullcontext
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import torch
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import torch.distributed as dist
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from colossal_llama.dataset.loader import (
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DataCollatorForSupervisedDataset,
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StatefulDistributedSampler,
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load_tokenized_dataset,
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)
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from colossal_llama.utils.ckpt_io import load_checkpoint, save_checkpoint
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from colossal_llama.utils.flash_attention_patch import replace_with_flash_attention
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from colossal_llama.utils.froze import freeze_non_embeds_parameters
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from colossal_llama.utils.neftune_patch import activate_neftune, deactivate_neftune
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from torch.utils.tensorboard import SummaryWriter
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from tqdm import tqdm
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from transformers import AutoTokenizer, LlamaForCausalLM
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import colossalai
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from colossalai.accelerator import get_accelerator
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from colossalai.booster import Booster
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from colossalai.booster.plugin import GeminiPlugin, HybridParallelPlugin, LowLevelZeroPlugin
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from colossalai.cluster import DistCoordinator
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from colossalai.lazy import LazyInitContext
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from colossalai.nn.lr_scheduler import CosineAnnealingWarmupLR
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from colossalai.nn.optimizer import HybridAdam
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from colossalai.utils import get_current_device
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def get_model_numel(model: torch.nn.Module) -> int:
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return sum(p.numel() for p in model.parameters())
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def format_numel_str(numel: int) -> str:
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B = 1024**3
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M = 1024**2
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K = 1024
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if numel >= B:
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return f"{numel / B:.2f} B"
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elif numel >= M:
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return f"{numel / M:.2f} M"
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elif numel >= K:
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return f"{numel / K:.2f} K"
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else:
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return f"{numel}"
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def all_reduce_mean(tensor: torch.Tensor) -> torch.Tensor:
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dist.all_reduce(tensor=tensor, op=dist.ReduceOp.SUM)
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tensor = tensor.data
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tensor.div_(dist.get_world_size())
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return tensor
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def main() -> None:
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# ==============================
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# Parse Arguments
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# ==============================
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parser = argparse.ArgumentParser()
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parser.add_argument(
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"--pretrained",
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type=str,
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default=None,
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help="Address of the pre-trained modeling",
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)
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parser.add_argument("--dataset", nargs="+", default=[])
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parser.add_argument(
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"--plugin",
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type=str,
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default="gemini",
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choices=["gemini", "gemini_auto", "zero2", "zero2_cpu", "3d"],
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help="Choose which plugin to use",
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)
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parser.add_argument("--load_checkpoint", type=str, default=None, help="Load checkpoint")
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parser.add_argument("--save_interval", type=int, default=1000, help="Save interval")
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parser.add_argument("--save_dir", type=str, default="checkpoint_dir", help="Checkpoint directory")
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parser.add_argument("--tensorboard_dir", type=str, default="logs_dir", help="Tensorboard directory")
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parser.add_argument("--config_file", type=str, default="config_file", help="Config file")
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parser.add_argument("--num_epochs", type=int, default=1, help="Number of training epochs")
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parser.add_argument("--accumulation_steps", type=int, default=1, help="Number of accumulation steps")
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parser.add_argument("--micro_batch_size", type=int, default=2, help="Batch size of each process")
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parser.add_argument("--lr", type=float, default=3e-4, help="Learning rate")
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parser.add_argument("--max_length", type=int, default=8192, help="Model max length")
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parser.add_argument(
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"--mixed_precision",
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type=str,
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default="fp16",
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choices=["fp16", "bf16"],
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help="Mixed precision",
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)
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parser.add_argument("--grad_clip", type=float, default=1.0, help="Gradient clipping value")
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parser.add_argument("--weight_decay", type=float, default=0.1, help="Weight decay")
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parser.add_argument("--warmup_steps", type=int, default=None, help="Warmup steps")
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parser.add_argument(
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"--use_grad_checkpoint",
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action="store_true",
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default=False,
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help="Use gradient checkpointing",
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)
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parser.add_argument(
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"--use_flash_attn",
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action="store_true",
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default=False,
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help="Use flash-attention",
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)
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parser.add_argument(
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"--use_neft",
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action="store_true",
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default=False,
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help="Use NEFTune",
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)
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parser.add_argument(
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"--freeze_non_embeds_params",
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action="store_true",
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default=False,
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help="Freeze non embeddings parameters",
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)
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parser.add_argument("--tp", type=int, default=1)
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parser.add_argument("--zero", type=int, default=1)
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parser.add_argument("--pad_token", choices=["eos", "unk"], default="eos")
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parser.add_argument("--padding_mode", choices=["max_length", "longest"], default="max_length")
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args = parser.parse_args()
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with open(args.config_file, "w") as f:
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json.dump(args.__dict__, f, indent=4)
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# ==============================
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# Initialize Distributed Training
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# ==============================
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colossalai.launch_from_torch()
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accelerator = get_accelerator()
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coordinator = DistCoordinator()
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# ==============================
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# Initialize Tensorboard
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# ==============================
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if coordinator.is_master():
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os.makedirs(args.tensorboard_dir, exist_ok=True)
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writer = SummaryWriter(args.tensorboard_dir)
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# ==============================
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# Initialize Booster
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# ==============================
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if args.plugin == "gemini":
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plugin = GeminiPlugin(
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precision=args.mixed_precision,
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initial_scale=2**16,
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max_norm=args.grad_clip,
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enable_gradient_accumulation=(args.accumulation_steps > 1),
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)
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elif args.plugin == "gemini_auto":
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plugin = GeminiPlugin(
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precision=args.mixed_precision,
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placement_policy="auto",
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initial_scale=2**16,
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max_norm=args.grad_clip,
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enable_gradient_accumulation=(args.accumulation_steps > 1),
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)
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elif args.plugin == "zero2":
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plugin = LowLevelZeroPlugin(
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stage=2,
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precision=args.mixed_precision,
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initial_scale=2**16,
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max_norm=args.grad_clip,
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)
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elif args.plugin == "zero2_cpu":
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plugin = LowLevelZeroPlugin(
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stage=2,
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precision=args.mixed_precision,
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initial_scale=2**16,
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cpu_offload=True,
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max_norm=args.grad_clip,
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)
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elif args.plugin == "3d":
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plugin = HybridParallelPlugin(
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tp_size=args.tp,
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pp_size=1,
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zero_stage=args.zero,
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max_norm=args.grad_clip,
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precision=args.mixed_precision,
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)
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else:
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raise ValueError(f"Unknown plugin {args.plugin}")
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booster = Booster(plugin=plugin)
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# ======================================================
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# Initialize Tokenizer, Dataset, Collator and Dataloader
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# ======================================================
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tokenizer = AutoTokenizer.from_pretrained(args.pretrained)
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if args.pad_token == "eos":
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tokenizer.pad_token = tokenizer.eos_token
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elif args.pad_token == "unk":
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tokenizer.pad_token = tokenizer.unk_token
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tokenizer.add_bos_token = False
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tokenizer.add_eos_token = False
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coordinator.print_on_master(f"Configuration file will be saved at: {args.config_file}")
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coordinator.print_on_master(f"Tensorboard logs will be saved at: {args.tensorboard_dir}")
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coordinator.print_on_master(f"Model checkpoint will be saved at: {args.save_dir}")
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coordinator.print_on_master(f"Load dataset: {args.dataset}")
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dataset = load_tokenized_dataset(dataset_paths=args.dataset, mode="train")
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data_collator = DataCollatorForSupervisedDataset(
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tokenizer=tokenizer, max_length=args.max_length, padding=args.padding_mode
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)
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dataloader = plugin.prepare_dataloader(
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dataset=dataset,
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batch_size=args.micro_batch_size,
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shuffle=True,
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drop_last=True,
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collate_fn=data_collator,
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distributed_sampler_cls=StatefulDistributedSampler,
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)
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coordinator.print_on_master(
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f"Max device memory after data loader: {accelerator.max_memory_allocated() / 1024 ** 2:.2f} MB"
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)
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# ======================================================
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# Initialize Model, Objective, Optimizer and LR Scheduler
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# ======================================================
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init_ctx = (
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LazyInitContext(default_device=get_current_device())
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if isinstance(plugin, (GeminiPlugin, HybridParallelPlugin))
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else nullcontext()
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)
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with init_ctx:
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model = LlamaForCausalLM.from_pretrained(args.pretrained)
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# Freeze part of parameters.
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if args.freeze_non_embeds_params:
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freeze_non_embeds_parameters(model=model)
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# this is essential, otherwise the grad checkpoint will not work.
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model.train()
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if args.use_grad_checkpoint:
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model.gradient_checkpointing_enable()
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coordinator.print_on_master(msg="Gradient checkpointing enabled successfully")
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if args.use_flash_attn:
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replace_with_flash_attention(model=model)
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coordinator.print_on_master(msg="Flash-attention enabled successfully")
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model_numel = get_model_numel(model)
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coordinator.print_on_master(f"Model params: {format_numel_str(model_numel)}")
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optimizer = HybridAdam(
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model_params=(
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filter(lambda p: p.requires_grad, model.parameters())
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if args.freeze_non_embeds_params
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else model.parameters()
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),
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lr=args.lr,
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betas=(0.9, 0.95),
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weight_decay=args.weight_decay,
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adamw_mode=True,
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)
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if args.warmup_steps is None:
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args.warmup_steps = int(args.num_epochs * 0.025 * (len(dataloader) // args.accumulation_steps))
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coordinator.print_on_master(f"Warmup steps is set to {args.warmup_steps}")
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lr_scheduler = CosineAnnealingWarmupLR(
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optimizer=optimizer,
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total_steps=args.num_epochs * (len(dataloader) // args.accumulation_steps),
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warmup_steps=args.warmup_steps,
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eta_min=0.1 * args.lr,
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)
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# Flash attention will be disabled because it does NOT support fp32.
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default_dtype = torch.float16 if args.mixed_precision == "fp16" else torch.bfloat16
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torch.set_default_dtype(default_dtype)
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model, optimizer, _, dataloader, lr_scheduler = booster.boost(
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model=model,
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optimizer=optimizer,
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lr_scheduler=lr_scheduler,
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dataloader=dataloader,
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)
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torch.set_default_dtype(torch.float)
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coordinator.print_on_master(
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f"Booster init max device memory: {accelerator.max_memory_allocated() / 1024 ** 2:.2f} MB"
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)
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coordinator.print_on_master(
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f"Booster init max CPU memory: {resource.getrusage(resource.RUSAGE_SELF).ru_maxrss / 1024:.2f} MB"
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)
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start_epoch = 0
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start_step = 0
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sampler_start_idx = 0
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if args.load_checkpoint is not None:
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if "modeling" in args.load_checkpoint:
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coordinator.print_on_master(f"Continued pretrain from checkpoint {args.load_checkpoint}")
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booster.load_model(model, args.load_checkpoint)
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else:
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coordinator.print_on_master(f"Load model checkpoint from {args.load_checkpoint}")
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start_epoch, start_step, sampler_start_idx = load_checkpoint(
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load_dir=args.load_checkpoint,
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booster=booster,
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model=model,
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optimizer=optimizer,
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lr_scheduler=lr_scheduler,
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)
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coordinator.print_on_master(
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f"Loaded checkpoint {args.load_checkpoint} at epoch {start_epoch} step {start_step}"
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)
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coordinator.print_on_master(f"Loaded sample at index {sampler_start_idx}")
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coordinator.print_on_master(
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f"Checkpoint loaded max device memory: {accelerator.max_memory_allocated() / 1024 ** 2:.2f} MB"
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)
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coordinator.print_on_master(
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f"Checkpoint loaded device memory: {accelerator.memory_allocated() / 1024 ** 2:.2f} MB"
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)
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coordinator.print_on_master(
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f"Checkpoint loaded max CPU memory: {resource.getrusage(resource.RUSAGE_SELF).ru_maxrss / 1024:.2f} MB"
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)
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if args.use_neft:
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coordinator.print_on_master("Activate NEFTune.")
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model, handle = activate_neftune(model)
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num_steps_per_epoch = len(dataloader) // args.accumulation_steps
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# If resume training, set the sampler start index to the correct value
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assert isinstance(dataloader.sampler, StatefulDistributedSampler)
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dataloader.sampler.set_start_index(start_index=sampler_start_idx)
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for epoch in range(start_epoch, args.num_epochs):
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dataloader.sampler.set_epoch(epoch=epoch)
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pbar = tqdm(
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desc=f"Epoch {epoch}",
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disable=not coordinator.is_master(),
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total=num_steps_per_epoch,
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initial=start_step // args.accumulation_steps,
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)
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total_loss = torch.tensor(0.0, device=get_current_device())
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for step, batch in enumerate(dataloader, start=start_step):
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batch = {k: v.to(get_current_device()) for k, v in batch.items() if isinstance(v, torch.Tensor)}
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batch_output = model(**batch)
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loss = batch_output.loss / args.accumulation_steps
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total_loss.add_(loss.data)
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booster.backward(loss=loss, optimizer=optimizer)
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if (step + 1) % args.accumulation_steps == 0:
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optimizer.step()
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lr_scheduler.step()
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optimizer.zero_grad()
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all_reduce_mean(tensor=total_loss)
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pbar.set_postfix({"Loss": f"{total_loss.item():.4f}"})
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if coordinator.is_master():
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global_step = (epoch * num_steps_per_epoch) + (step + 1) // args.accumulation_steps
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writer.add_scalar(tag="Loss", scalar_value=total_loss.item(), global_step=global_step)
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writer.add_scalar(
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tag="Learning Rate",
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scalar_value=lr_scheduler.get_last_lr()[0],
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global_step=global_step,
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)
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total_loss.fill_(0.0)
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pbar.update()
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# Save modeling.
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if (args.save_interval > 0 and (step + 1) % (args.save_interval * args.accumulation_steps) == 0) or (
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step + 1
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) == len(dataloader):
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coordinator.print_on_master("\nStart saving model checkpoint with running states")
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if args.use_neft:
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coordinator.print_on_master("Deactivate NEFTune before saving model.")
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deactivate_neftune(model, handle)
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accelerator.empty_cache()
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save_checkpoint(
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save_dir=args.save_dir,
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booster=booster,
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model=model,
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optimizer=optimizer,
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lr_scheduler=lr_scheduler,
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epoch=epoch,
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step=step + 1,
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batch_size=args.micro_batch_size,
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coordinator=coordinator,
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)
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coordinator.print_on_master(
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f"Saved checkpoint at epoch {epoch} step {step + 1} at folder {args.save_dir}"
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)
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if args.use_neft:
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coordinator.print_on_master("Activate NEFTune.")
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model, handle = activate_neftune(model)
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# Delete cache.
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# del batch, batch_labels, batch_output, loss
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accelerator.empty_cache()
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# the continue epochs are not resumed, so we need to reset the sampler start index and start step
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dataloader.sampler.set_start_index(start_index=0)
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start_step = 0
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if args.use_neft:
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coordinator.print_on_master("Deactivate NEFTune.")
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deactivate_neftune(model, handle)
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# Final save.
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coordinator.print_on_master("Start saving final model checkpoint")
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booster.save_model(model, os.path.join(args.save_dir, "modeling"), shard=True)
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coordinator.print_on_master(f"Saved final model checkpoint at epoch {epoch} at folder {args.save_dir}")
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coordinator.print_on_master(f"Max device memory usage: {accelerator.max_memory_allocated()/1024**2:.2f} MB")
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if __name__ == "__main__":
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main()
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