214 lines
6.9 KiB
Python
214 lines
6.9 KiB
Python
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# Copyright (c) OpenMMLab. All rights reserved.
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import torch
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from datasets import load_dataset
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from mmengine.dataset import DefaultSampler
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from mmengine.hooks import (CheckpointHook, DistSamplerSeedHook, IterTimerHook,
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LoggerHook, ParamSchedulerHook)
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from mmengine.optim import AmpOptimWrapper, CosineAnnealingLR, LinearLR
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from peft import LoraConfig
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from torch.optim import AdamW
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from transformers import (AutoModelForCausalLM, AutoTokenizer,
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BitsAndBytesConfig)
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from xtuner.dataset import process_hf_dataset
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from xtuner.dataset.collate_fns import default_collate_fn
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from xtuner.dataset.map_fns import alpaca_map_fn, template_map_fn_factory
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from xtuner.engine.hooks import (DatasetInfoHook, EvaluateChatHook,
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VarlenAttnArgsToMessageHubHook)
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from xtuner.engine.runner import TrainLoop
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from xtuner.model import SupervisedFinetune
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from xtuner.parallel.sequence import SequenceParallelSampler
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from xtuner.utils import PROMPT_TEMPLATE, SYSTEM_TEMPLATE
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#######################################################################
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# PART 1 Settings #
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#######################################################################
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# Model
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pretrained_model_name_or_path = 'Qwen2-7B-Instruct' # your model path
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use_varlen_attn = False
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# Data
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alpaca_en_path = '../datasets/aiwei.json'
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prompt_template = PROMPT_TEMPLATE.qwen_chat
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max_length = 1024
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pack_to_max_length = True
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# parallel
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sequence_parallel_size = 1
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# Scheduler & Optimizer
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batch_size = 8 # per_device
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accumulative_counts = 16
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accumulative_counts *= sequence_parallel_size
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dataloader_num_workers = 4
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max_epochs = 3
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optim_type = AdamW
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lr = 1e-5
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betas = (0.9, 0.999)
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weight_decay = 0
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max_norm = 1 # grad clip
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warmup_ratio = 0.03
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# Save
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save_steps = 100
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save_total_limit = 2 # Maximum checkpoints to keep (-1 means unlimited)
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# Evaluate the generation performance during the training
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evaluation_freq = 100
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SYSTEM = "现在你是一个心理专家，我有一些心理问题，请你用专业的知识帮我解决。"
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evaluation_inputs = [
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'我压力很大', '生活没意思', "非常容易羡慕别人啊"
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]
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#######################################################################
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# PART 2 Model & Tokenizer #
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#######################################################################
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tokenizer = dict(
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type=AutoTokenizer.from_pretrained,
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pretrained_model_name_or_path=pretrained_model_name_or_path,
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trust_remote_code=True,
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padding_side='right')
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model = dict(
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type=SupervisedFinetune,
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use_varlen_attn=use_varlen_attn,
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llm=dict(
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type=AutoModelForCausalLM.from_pretrained,
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pretrained_model_name_or_path=pretrained_model_name_or_path,
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trust_remote_code=True,
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torch_dtype=torch.float16,
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),
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lora=dict(
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type=LoraConfig,
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r=32,
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lora_alpha=16,
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lora_dropout=0.1,
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bias='none',
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task_type='CAUSAL_LM'))
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#######################################################################
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# PART 3 Dataset & Dataloader #
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#######################################################################
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alpaca_en = dict(
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type=process_hf_dataset,
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dataset=dict(type=load_dataset, path='json',
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data_files=dict(train=alpaca_en_path)),
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tokenizer=tokenizer,
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max_length=max_length,
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dataset_map_fn=None,
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template_map_fn=dict(
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type=template_map_fn_factory, template=prompt_template),
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remove_unused_columns=True,
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shuffle_before_pack=True,
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pack_to_max_length=pack_to_max_length,
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use_varlen_attn=use_varlen_attn)
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sampler = SequenceParallelSampler \
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if sequence_parallel_size > 1 else DefaultSampler
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train_dataloader = dict(
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batch_size=batch_size,
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num_workers=dataloader_num_workers,
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dataset=alpaca_en,
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sampler=dict(type=sampler, shuffle=True),
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collate_fn=dict(type=default_collate_fn, use_varlen_attn=use_varlen_attn))
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#######################################################################
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# PART 4 Scheduler & Optimizer #
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#######################################################################
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# optimizer
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optim_wrapper = dict(
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type=AmpOptimWrapper,
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optimizer=dict(
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type=optim_type, lr=lr, betas=betas, weight_decay=weight_decay),
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clip_grad=dict(max_norm=max_norm, error_if_nonfinite=False),
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accumulative_counts=accumulative_counts,
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loss_scale='dynamic',
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dtype='float16')
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# learning policy
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# More information: https://github.com/open-mmlab/mmengine/blob/main/docs/en/tutorials/param_scheduler.md # noqa: E501
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param_scheduler = [
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dict(
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type=LinearLR,
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start_factor=1e-5,
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by_epoch=True,
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begin=0,
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end=warmup_ratio * max_epochs,
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convert_to_iter_based=True),
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dict(
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type=CosineAnnealingLR,
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eta_min=0.0,
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by_epoch=True,
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begin=warmup_ratio * max_epochs,
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end=max_epochs,
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convert_to_iter_based=True)
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]
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# train, val, test setting
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train_cfg = dict(type=TrainLoop, max_epochs=max_epochs)
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#######################################################################
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# PART 5 Runtime #
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#######################################################################
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# Log the dialogue periodically during the training process, optional
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custom_hooks = [
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dict(type=DatasetInfoHook, tokenizer=tokenizer),
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dict(
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type=EvaluateChatHook,
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tokenizer=tokenizer,
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every_n_iters=evaluation_freq,
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evaluation_inputs=evaluation_inputs,
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system=SYSTEM,
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prompt_template=prompt_template)
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]
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if use_varlen_attn:
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custom_hooks += [dict(type=VarlenAttnArgsToMessageHubHook)]
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# configure default hooks
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default_hooks = dict(
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# record the time of every iteration.
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timer=dict(type=IterTimerHook),
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# print log every 10 iterations.
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logger=dict(type=LoggerHook, log_metric_by_epoch=False, interval=10),
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# enable the parameter scheduler.
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param_scheduler=dict(type=ParamSchedulerHook),
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# save checkpoint per `save_steps`.
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checkpoint=dict(
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type=CheckpointHook,
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by_epoch=False,
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interval=save_steps,
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max_keep_ckpts=save_total_limit),
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# set sampler seed in distributed evrionment.
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sampler_seed=dict(type=DistSamplerSeedHook),
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)
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# configure environment
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env_cfg = dict(
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# whether to enable cudnn benchmark
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cudnn_benchmark=False,
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# set multi process parameters
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mp_cfg=dict(mp_start_method='fork', opencv_num_threads=0),
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# set distributed parameters
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dist_cfg=dict(backend='nccl'),
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)
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# set visualizer
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visualizer = None
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# set log level
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log_level = 'INFO'
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# load from which checkpoint
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load_from = None
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# whether to resume training from the loaded checkpoint
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resume = False
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# Defaults to use random seed and disable `deterministic`
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randomness = dict(seed=None, deterministic=False)
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# set log processor
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log_processor = dict(by_epoch=False)
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