|
| 1 | +from peft import LoraConfig |
| 2 | +from tqdm import tqdm |
| 3 | + |
| 4 | +import twinkle |
| 5 | +from twinkle import DeviceMesh, get_device_placement, get_logger |
| 6 | +from twinkle.data_format import Trajectory, Message |
| 7 | +from twinkle.dataloader import DataLoader |
| 8 | +from twinkle.dataset import LazyDataset, DatasetMeta |
| 9 | +from twinkle.model import TransformersModel |
| 10 | +from twinkle.preprocessor import Preprocessor |
| 11 | + |
| 12 | +# Construct a device_mesh, fsdp=2 |
| 13 | +device_mesh = DeviceMesh.from_sizes(fsdp_size=2) |
| 14 | +# use torchrun mode |
| 15 | +twinkle.initialize(mode='local', global_device_mesh=device_mesh) |
| 16 | + |
| 17 | +logger = get_logger() |
| 18 | + |
| 19 | + |
| 20 | +class LatexOCRProcessor(Preprocessor): |
| 21 | + |
| 22 | + def __call__(self, rows): |
| 23 | + rows = self.map_col_to_row(rows) |
| 24 | + rows = [self.preprocess(row) for row in rows] |
| 25 | + rows = self.map_row_to_col(rows) |
| 26 | + return rows |
| 27 | + |
| 28 | + def preprocess(self, row) -> Trajectory: |
| 29 | + return Trajectory( |
| 30 | + messages=[ |
| 31 | + Message(role='user', content='<image>Using LaTeX to perform OCR on the image.', images=[row['image']]), |
| 32 | + Message(role='assistant', content=row['text']), |
| 33 | + ] |
| 34 | + ) |
| 35 | + |
| 36 | + |
| 37 | +def eval(model): |
| 38 | + # 100 Samples |
| 39 | + dataset = LazyDataset(dataset_meta=DatasetMeta('ms://AI-ModelScope/LaTeX_OCR', data_slice=range(100))) |
| 40 | + dataset.set_template('Qwen3_5Template', model_id='ms://Qwen/Qwen3.5-4B') |
| 41 | + dataset.map(LatexOCRProcessor) |
| 42 | + dataset.encode() |
| 43 | + dataloader = DataLoader(dataset=dataset, batch_size=8) |
| 44 | + for step, batch in tqdm(enumerate(dataloader)): |
| 45 | + model.forward_only(inputs=batch) |
| 46 | + model.calculate_loss() |
| 47 | + metrics = model.calculate_metric(is_training=False) |
| 48 | + return metrics |
| 49 | + |
| 50 | + |
| 51 | +def train(): |
| 52 | + # 2000 samples |
| 53 | + dataset = LazyDataset(dataset_meta=DatasetMeta('ms://AI-ModelScope/LaTeX_OCR', data_slice=range(2000))) |
| 54 | + # Set template to prepare encoding |
| 55 | + dataset.set_template('Qwen3_5Template', model_id='ms://Qwen/Qwen3.5-4B', max_length=1024) |
| 56 | + # Preprocess the dataset to standard format |
| 57 | + dataset.map(LatexOCRProcessor) |
| 58 | + # Encode dataset |
| 59 | + dataset.encode() |
| 60 | + # Global batch size = 4, for GPUs, so 2 sample per GPU |
| 61 | + dataloader = DataLoader(dataset=dataset, batch_size=4) |
| 62 | + # Use a TransformersModel |
| 63 | + from transformers.models.qwen3_5.modeling_qwen3_5 import Qwen3_5ForConditionalGeneration |
| 64 | + model = TransformersModel(model_id='ms://Qwen/Qwen3.5-4B', model_cls=Qwen3_5ForConditionalGeneration) |
| 65 | + model.model._no_split_modules = {'Qwen3_5DecoderLayer'} |
| 66 | + |
| 67 | + lora_config = LoraConfig(r=8, lora_alpha=32, target_modules='all-linear') |
| 68 | + |
| 69 | + # Add a lora to model, with name `default` |
| 70 | + # Comment this to use full-parameter training |
| 71 | + model.add_adapter_to_model('default', lora_config, gradient_accumulation_steps=2) |
| 72 | + # Add Optimizer for lora `default` |
| 73 | + model.set_template('Qwen3_5Template', model_id='ms://Qwen/Qwen3.5-4B') |
| 74 | + model.set_optimizer(optimizer_cls='AdamW', lr=1e-4) |
| 75 | + # Add LRScheduler for lora `default` |
| 76 | + model.set_lr_scheduler( |
| 77 | + scheduler_cls='CosineWarmupScheduler', num_warmup_steps=5, num_training_steps=len(dataloader)) |
| 78 | + logger.info(get_device_placement()) |
| 79 | + # Print the training config |
| 80 | + logger.info(model.get_train_configs()) |
| 81 | + logger.info(f'Total steps: {len(dataloader)}') |
| 82 | + loss_metric = 99.0 |
| 83 | + for step, batch in enumerate(dataloader): |
| 84 | + # Do forward and backward |
| 85 | + model.forward_backward(inputs=batch) |
| 86 | + # Step |
| 87 | + model.clip_grad_and_step() |
| 88 | + if step % 20 == 0: |
| 89 | + # Print metric |
| 90 | + metric = model.calculate_metric(is_training=True) |
| 91 | + logger.info(f'Current is step {step} of {len(dataloader)}, metric: {metric}') |
| 92 | + if step > 0 and step % 40 == 0: |
| 93 | + metrics = eval(model) |
| 94 | + logger.info(f'Eval metric: {metrics}') |
| 95 | + metrics['step'] = step |
| 96 | + if loss_metric > float(metrics['loss']): |
| 97 | + model.save(f'checkpoint-{step}') |
| 98 | + loss_metric = float(metrics['loss']) |
| 99 | + model.save(f'last-checkpoint') |
| 100 | + |
| 101 | + |
| 102 | +if __name__ == '__main__': |
| 103 | + train() |
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