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dllm/examples/dream/pt.py

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+"""
+Local users
+------------
+- 1 GPU (4bit quant & LoRA, useful for testing):
+    accelerate launch \
+        --config_file scripts/accelerate_configs/ddp.yaml --num_processes 1 \
+        examples/dream/pt.py \
+        --load_in_4bit True --lora True
+
+- 8 GPUs (FSDP):
+    accelerate launch \
+        --config_file scripts/accelerate_configs/fsdp.yaml \
+        examples/dream/pt.py
+
+Slurm users
+# Note: run `mkdir logs` before running sbatch; and adjust 
+#       `partition` and `quotatype` in `scripts/train.slurm.sh` for your cluster.
+------------
+- 24 Nodes, 192 GPUs (FSDP):
+    sbatch --nodes=24 --gres=gpu:8 scripts/train.slurm.sh \
+        --accelerate_config "fsdp" \
+        --script_path "examples/dream/pt.py"
+"""
+
+import os
+import functools
+from dataclasses import dataclass, field
+
+import torch
+import transformers
+import accelerate
+
+import dllm
+from dllm.pipelines import dream
+logger = dllm.utils.get_default_logger(__name__)
+
+
+@dataclass
+class ModelArguments(dllm.utils.ModelArguments):
+    model_name_or_path: str = "Dream-org/Dream-v0-Base-7B"
+
+
+@dataclass
+class DataArguments(dllm.utils.DataArguments):
+    dataset_args: str = "mlfoundations/dclm-baseline-1.0[train:10_000_000,test:10_000]"
+    text_field: str = "text"
+    streaming: bool = True
+    drop_tail: bool = True
+    insert_eos: bool = field(
+        default=True,
+        metadata={
+            "help": "False when adjacent samples from the datasets are semantically coherent."
+        },
+    )
+    random_length_ratio: float = field(
+        default=0.01,
+        metadata={
+            "help": (
+                "The probability of randomly cut sequences during training. "
+                "See https://github.com/ML-GSAI/LLaDA/blob/main/GUIDELINES.md."
+            )
+        },
+    )
+
+
+@dataclass
+class TrainingArguments(dllm.utils.TrainingArguments):
+    output_dir: str = (
+        "models/Dream-7B-PT/dclm-baseline-1.0[train:10_000_000,test:10_000]"
+    )
+    learning_rate: float = 3e-4
+    max_steps: int = 2_000
+    per_device_train_batch_size: int = 4
+    gradient_accumulation_steps: int = 4
+    eval_steps: float = 0.05
+    save_steps: float = 0.05
+    # Dream PT specific args
+    # Note: Since Dream’s pretraining recipe is not public,
+    # this is only a reference implementation following LLaDA’s data processing approach.
+    loss_weight_type: str = field(
+        default="cart[geo_p:0.3]",
+        metadata={
+            "help": (
+                "The loss weight type. "
+                "See https://github.com/DreamLM/Dream/blob/main/src/trainer/config/sft_trainer.yaml."
+            )
+        },
+    )
+
+
+def train():
+    # ----- Parse & setup --------------------------------------------------------
+    parser = transformers.HfArgumentParser(
+        (ModelArguments, DataArguments, TrainingArguments)
+    )
+    model_args, data_args, training_args = parser.parse_args_into_dataclasses()
+    # necessary for streaming dataset
+    if data_args.streaming:
+        training_args.accelerator_config.dispatch_batches = False
+    dllm.utils.print_args_main(model_args, data_args, training_args)
+    dllm.utils.initial_training_setup(model_args, data_args, training_args)
+
+    # ----- Model ---------------------------------------------------------------
+    # initialize model weights from scratch
+    config = transformers.AutoConfig.from_pretrained(model_args.model_name_or_path)
+    with dllm.utils.init_device_context_manager():
+        model = transformers.AutoModel.from_config(config, dtype=torch.bfloat16)
+
+    # ----- Tokenizer -----------------------------------------------------------
+    tokenizer = dllm.utils.get_tokenizer(model_args=model_args)
+    # ----- Optional PEFT: LoRA -------------------------------------------------
+    model = dllm.utils.load_peft(model=model, model_args=model_args)
+
+    # ----- Dataset -------------------------------------------------------------
+    with accelerate.PartialState().local_main_process_first():
+        dataset = dllm.data.load_pt_dataset(
+            data_args.dataset_args,
+            streaming=data_args.streaming,
+        )
+        dataset = dataset.map(
+            functools.partial(
+                dllm.utils.tokenize_and_group,
+                tokenizer=tokenizer,
+                text_field=data_args.text_field,
+                seq_length=data_args.max_length,
+                insert_eos=data_args.insert_eos,
+                drop_tail=data_args.drop_tail,
+            ),
+            batched=True,
+            remove_columns=dataset["train"].column_names,
+            **({} if data_args.streaming else {"num_proc": data_args.num_proc}),
+            **({} if data_args.streaming else {"desc": "Mapping dataset to PT format"}),
+        )
+        if data_args.streaming:
+            dataset = dataset.shuffle(seed=training_args.seed)
+
+    # ----- Training --------------------------------------------------------------
+    accelerate.PartialState().wait_for_everyone()
+    logger.info("Start training...")
+    trainer = dream.DreamTrainer(
+        model=model,
+        tokenizer=tokenizer,
+        train_dataset=dataset["train"],
+        eval_dataset=dataset.get("test", None),
+        args=training_args,
+        loss_weight_type=training_args.loss_weight_type,
+        data_collator=dream.utils.DreamPTCollator(
+            tokenizer,
+            return_tensors="pt",
+            padding=True,
+            random_length_ratio=data_args.random_length_ratio,
+        ),
+    )
+    trainer.train()
+    trainer.save_model(os.path.join(training_args.output_dir, "checkpoint-final"))
+    trainer.processing_class.save_pretrained(
+        os.path.join(training_args.output_dir, "checkpoint-final")
+    )
+
+
+if __name__ == "__main__":
+    train()