[chatgpt] support instuct training (#3216)

applications/ChatGPT/chatgpt/dataset/__init__.py

 from .reward_dataset import RmStaticDataset, HhRlhfDataset
 from .utils import is_rank_0
-from .sft_dataset import SFTDataset
+from .sft_dataset import SFTDataset, AlpacaDataset, AlpacaDataCollator
 
-__all__ = ['RmStaticDataset', 'HhRlhfDataset','is_rank_0', 'SFTDataset']
+__all__ = ['RmStaticDataset', 'HhRlhfDataset','is_rank_0', 'SFTDataset', 'AlpacaDataset', 'AlpacaDataCollator']

applications/ChatGPT/chatgpt/dataset/sft_dataset.py

-from typing import Callable
+#    Copyright 2023 Rohan Taori, Ishaan Gulrajani, Tianyi Zhang, Yann Dubois, Xuechen Li
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+
+import copy
+from dataclasses import dataclass, field
+from typing import Callable, Dict, Sequence
 import random
 from torch.utils.data import Dataset
 import torch.distributed as dist
 from tqdm import tqdm
 import torch
 
-from .utils import is_rank_0
+from .utils import is_rank_0, jload
+
+import transformers
+from colossalai.logging import get_dist_logger
 
+logger = get_dist_logger()
+
+IGNORE_INDEX = -100
+PROMPT_DICT = {
+    "prompt_input": (
+        "Below is an instruction that describes a task, paired with an input that provides further context. "
+        "Write a response that appropriately completes the request.\n\n"
+        "### Instruction:\n{instruction}\n\n### Input:\n{input}\n\n### Response:"
+    ),
+    "prompt_no_input": (
+        "Below is an instruction that describes a task. "
+        "Write a response that appropriately completes the request.\n\n"
+        "### Instruction:\n{instruction}\n\n### Response:"
+    ),
+}
 
 class SFTDataset(Dataset):
     """
@@ -38,3 +72,87 @@ class SFTDataset(Dataset):
 
     def __getitem__(self, idx):
         return self.prompts[idx]
+    
+
+def _tokenize_fn(strings: Sequence[str], tokenizer: transformers.PreTrainedTokenizer) -> Dict:
+    """Tokenize a list of strings."""
+    tokenized_list = [
+        tokenizer(
+            text,
+            return_tensors="pt",
+            padding="longest",
+            max_length=tokenizer.model_max_length,
+            truncation=True,
+        )
+        for text in strings
+    ]
+    input_ids = labels = [tokenized.input_ids[0] for tokenized in tokenized_list]
+    input_ids_lens = labels_lens = [
+        tokenized.input_ids.ne(tokenizer.pad_token_id).sum().item() for tokenized in tokenized_list
+    ]
+    return dict(
+        input_ids=input_ids,
+        labels=labels,
+        input_ids_lens=input_ids_lens,
+        labels_lens=labels_lens,
+    )
+
+def preprocess(
+    sources: Sequence[str],
+    targets: Sequence[str],
+    tokenizer: transformers.PreTrainedTokenizer,
+) -> Dict:
+    """Preprocess the data by tokenizing."""
+    examples = [s + t for s, t in zip(sources, targets)]
+    examples_tokenized, sources_tokenized = [_tokenize_fn(strings, tokenizer) for strings in (examples, sources)]
+    input_ids = examples_tokenized["input_ids"]
+    labels = copy.deepcopy(input_ids)
+    for label, source_len in zip(labels, sources_tokenized["input_ids_lens"]):
+        label[:source_len] = IGNORE_INDEX
+    return dict(input_ids=input_ids, labels=labels)
+
+class AlpacaDataset(Dataset):
+    """Dataset for supervised fine-tuning."""
+
+    def __init__(self, data_path: str, tokenizer: transformers.PreTrainedTokenizer):
+        super(AlpacaDataset, self).__init__()
+        logger.info("Loading data...")
+        list_data_dict = jload(data_path)
+
+        logger.info("Formatting inputs...")
+        prompt_input, prompt_no_input = PROMPT_DICT["prompt_input"], PROMPT_DICT["prompt_no_input"]
+        sources = [
+            prompt_input.format_map(example) if example.get("input", "") != "" else prompt_no_input.format_map(example)
+            for example in list_data_dict
+        ]
+        targets = [f"{example['output']}{tokenizer.eos_token}" for example in list_data_dict]
+
+        logger.info("Tokenizing inputs... This may take some time...")
+        data_dict = preprocess(sources, targets, tokenizer)
+
+        self.input_ids = data_dict["input_ids"]
+        self.labels = data_dict["labels"]
+
+    def __len__(self):
+        return len(self.input_ids)
+
+    def __getitem__(self, i) -> Dict[str, torch.Tensor]:
+        return dict(input_ids=self.input_ids[i], labels=self.labels[i])
+    
+@dataclass
+class AlpacaDataCollator(object):
+    """Collate examples for supervised fine-tuning."""
+
+    tokenizer: transformers.PreTrainedTokenizer
+
+    def __call__(self, instances: Sequence[Dict]) -> Dict[str, torch.Tensor]:
+        input_ids, labels = tuple([instance[key] for instance in instances] for key in ("input_ids", "labels"))
+        input_ids = torch.nn.utils.rnn.pad_sequence(
+            input_ids, batch_first=True, padding_value=self.tokenizer.pad_token_id
+        )
+        labels = torch.nn.utils.rnn.pad_sequence(labels, batch_first=True, padding_value=IGNORE_INDEX)
+        return dict(
+            input_ids=input_ids,
+            labels=labels,
+            attention_mask=input_ids.ne(self.tokenizer.pad_token_id),
+        )

applications/ChatGPT/chatgpt/dataset/utils.py

+import io
+import json
+
 import torch.distributed as dist
 
 
 def is_rank_0() -> bool:
     return not dist.is_initialized() or dist.get_rank() == 0
+
+def _make_r_io_base(f, mode: str):
+    if not isinstance(f, io.IOBase):
+        f = open(f, mode=mode)
+    return f
+
+def jload(f, mode="r"):
+    """Load a .json file into a dictionary."""
+    f = _make_r_io_base(f, mode)
+    jdict = json.load(f)
+    f.close()
+    return jdict
\ No newline at end of file

applications/ChatGPT/chatgpt/models/llama/__init__.py

 from .llama_actor import LlamaActor
 from .llama_critic import LlamaCritic
 from .llama_rm import LlamaRM
+from .llama_lm import LlamaLM
 
-__all__ = ['LlamaActor', 'LlamaCritic', 'LlamaRM']
+__all__ = ['LlamaActor', 'LlamaCritic', 'LlamaRM', 'LlamaLM']

applications/ChatGPT/chatgpt/models/llama/llama_lm.py

+from typing import Optional
+
+from transformers import LlamaConfig, LlamaForCausalLM
+
+from ..base import LM
+
+
+class LlamaLM(LM):
+    """
+    Llama language model.
+
+    Args:
+        pretrained (str): Pretrained model name or path.
+        config (LlamaConfig): Model config.
+        checkpoint (bool): Enable gradient checkpointing.
+        lora_rank (int): LoRA rank.
+        lora_train_bias (str): LoRA bias training mode.
+    """
+
+    def __init__(self,
+                 pretrained: Optional[str] = None,
+                 config: Optional[LlamaConfig] = None,
+                 checkpoint: bool = False,
+                 lora_rank: int = 0,
+                 lora_train_bias: str = 'none') -> None:
+
+        if pretrained is not None:
+            model = LlamaForCausalLM.from_pretrained(pretrained)
+        elif config is not None:
+            model = LlamaForCausalLM(config)
+        else:
+            model = LlamaForCausalLM(LlamaConfig())
+
+        if checkpoint:
+            model.gradient_checkpointing_enable()
+            
+        super().__init__(model, lora_rank, lora_train_bias)
+

applications/ChatGPT/chatgpt/trainer/sft.py

@@ -2,7 +2,6 @@ from abc import ABC
 from typing import Optional
 import loralib as lora
 import torch
-from chatgpt.dataset import SFTDataset
 from chatgpt.models.loss import GPTLMLoss
 from torch.optim import Adam, Optimizer
 from torch.utils.data import DataLoader
@@ -22,8 +21,8 @@ class SFTTrainer(ABC):
         model (torch.nn.Module): the model to train
         strategy (Strategy): the strategy to use for training
         optim(Optimizer): the optimizer to use for training
-        train_dataset (SFTDataset or SFTDistributedDataset): the dataset to use for training
-        eval_dataset (SFTDataset or SFTDistributedDataset): the dataset to use for evaluation
+        train_dataloader: the dataloader to use for training
+        eval_dataloader: the dataloader to use for evaluation
         batch_size (int, defaults to 1): the batch size while training
         max_epochs (int, defaults to 2): the number of epochs to train
         optim_kwargs (dict, defaults to {'lr':1e-4}): the kwargs to use while initializing optimizer
@@ -34,8 +33,8 @@ class SFTTrainer(ABC):
         model,
         strategy: Strategy,
         optim: Optimizer,
-        train_dataset: SFTDataset,
-        eval_dataset: SFTDataset,
+        train_dataloader: DataLoader,
+        eval_dataloader: DataLoader = None,
         sampler: Optional[DistributedSampler] = None,
         batch_size: int = 1,
         max_epochs: int = 2,
@@ -43,13 +42,10 @@ class SFTTrainer(ABC):
         super().__init__()
         self.strategy = strategy
         self.epochs = max_epochs
-        self.train_dataset = train_dataset
-        self.eval_dataset = eval_dataset
         self.sampler = sampler
 
-        self.train_dataloader = DataLoader(self.train_dataset, shuffle=(sampler is None),
-                                           sampler=sampler, batch_size=batch_size)
-        self.eval_dataloader = DataLoader(self.eval_dataset, batch_size=batch_size)
+        self.train_dataloader = train_dataloader
+        self.eval_dataloader = eval_dataloader
 
         self.model = strategy.setup_model(model)
         if "DDP" in str(self.strategy):
@@ -79,23 +75,25 @@ class SFTTrainer(ABC):
                     logger.info(f'Train Epoch {epoch}/{self.epochs} Batch {batch_id} Rank {dist.get_rank()} loss {loss.item()}')
 
             # eval
-            self.model.eval()
-            with torch.no_grad():
-                loss_sum = 0
-                num_seen = 0
-                for batch in self.eval_dataloader:
-                    prompt_ids = batch["input_ids"]
-                    p_mask = batch["attention_mask"]
-                    prompt_ids = prompt_ids.squeeze(1).cuda()
-                    p_mask = p_mask.squeeze(1).cuda()
+            if self.eval_dataloader is not None:
+                self.model.eval()
+                with torch.no_grad():
+                    loss_sum = 0
+                    num_seen = 0
+                    for batch in self.eval_dataloader:
+                        prompt_ids = batch["input_ids"]
+                        p_mask = batch["attention_mask"]
+                        prompt_ids = prompt_ids.squeeze(1).cuda()
+                        p_mask = p_mask.squeeze(1).cuda()
 
-                    prompt_logits = self.model(prompt_ids, attention_mask=p_mask)
-                    loss = self.loss_fn(prompt_logits, prompt_ids)
-                    loss_sum += loss.item()
-                    num_seen += prompt_ids.size(0)
+                        prompt_logits = self.model(prompt_ids, attention_mask=p_mask)
+                        loss = self.loss_fn(prompt_logits, prompt_ids)
+                        loss_sum += loss.item()
+                        num_seen += prompt_ids.size(0)
 
-                loss_mean = loss_sum / num_seen
-                if dist.get_rank() == 0:
-                    logger.info(f'Eval Epoch {epoch}/{self.epochs} loss {loss_mean}')
+                    loss_mean = loss_sum / num_seen
+                    if dist.get_rank() == 0:
+                        logger.info(f'Eval Epoch {epoch}/{self.epochs} loss {loss_mean}')
+                        
             epoch_bar.update()
 

applications/ChatGPT/chatgpt/utils/__init__.py

+from .tokenizer_utils import smart_tokenizer_and_embedding_resize, prepare_llama_tokenizer_and_embedding
+
+__all__ = ['smart_tokenizer_and_embedding_resize', 'prepare_llama_tokenizer_and_embedding']
\ No newline at end of file

applications/ChatGPT/chatgpt/utils/tokenizer_utils.py

+#    Copyright 2023 Rohan Taori, Ishaan Gulrajani, Tianyi Zhang, Yann Dubois, Xuechen Li
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+
+from typing import Dict
+
+import transformers
+
+DEFAULT_PAD_TOKEN = "[PAD]"
+DEFAULT_EOS_TOKEN = "</s>"
+DEFAULT_BOS_TOKEN = "</s>"
+DEFAULT_UNK_TOKEN = "</s>"
+
+def prepare_llama_tokenizer_and_embedding(
+    tokenizer: transformers.PreTrainedTokenizer,
+    model: transformers.PreTrainedModel,
+    special_tokens_dict: Dict = dict(pad_token=DEFAULT_PAD_TOKEN),
+):
+    """prepare llama tokenizer and embedding.
+
+    """
+
+    if tokenizer.pad_token is None:
+        smart_tokenizer_and_embedding_resize(
+            special_tokens_dict=dict(pad_token=DEFAULT_PAD_TOKEN),
+            tokenizer=tokenizer,
+            model=model,
+        )
+
+    tokenizer.add_special_tokens(
+        {
+            "eos_token": DEFAULT_EOS_TOKEN,
+            "bos_token": DEFAULT_BOS_TOKEN,
+            "unk_token": DEFAULT_UNK_TOKEN,
+        }
+    )
+
+    return tokenizer
+
+
+def smart_tokenizer_and_embedding_resize(
+    tokenizer: transformers.PreTrainedTokenizer,
+    model: transformers.PreTrainedModel,
+    special_tokens_dict: Dict = dict(pad_token=DEFAULT_PAD_TOKEN),
+):
+    """Resize tokenizer and embedding.
+
+    Note: This is the unoptimized version that may make your embedding size not be divisible by 64.
+    """
+
+    if tokenizer.pad_token is None:
+        num_new_tokens = tokenizer.add_special_tokens(special_tokens_dict)
+        model.resize_token_embeddings(len(tokenizer))
+
+        if num_new_tokens > 0:
+            input_embeddings = model.get_input_embeddings().weight.data
+            output_embeddings = model.get_output_embeddings().weight.data
+
+            input_embeddings_avg = input_embeddings[:-num_new_tokens].mean(dim=0, keepdim=True)
+            output_embeddings_avg = output_embeddings[:-num_new_tokens].mean(dim=0, keepdim=True)
+
+            input_embeddings[-num_new_tokens:] = input_embeddings_avg
+            output_embeddings[-num_new_tokens:] = output_embeddings_avg
+            
\ No newline at end of file

applications/ChatGPT/examples/train_sft.py

@@ -4,15 +4,18 @@ import loralib as lora
 import torch
 import torch.distributed as dist
 from torch.utils.data.distributed import DistributedSampler
-from chatgpt.dataset import SFTDataset
+from chatgpt.dataset import SFTDataset, AlpacaDataset, AlpacaDataCollator
 from chatgpt.models.base import RewardModel
 from chatgpt.models.bloom import BLOOMLM
 from chatgpt.models.gpt import GPTLM
 from chatgpt.models.opt import OPTLM
+from chatgpt.models.llama import LlamaLM
 from chatgpt.trainer import SFTTrainer
 from chatgpt.trainer.strategies import ColossalAIStrategy, DDPStrategy, NaiveStrategy
+from chatgpt.utils import prepare_llama_tokenizer_and_embedding
 from datasets import load_dataset
 from torch.optim import Adam
+from torch.utils.data import DataLoader
 from transformers import AutoTokenizer, BloomTokenizerFast
 from transformers.models.gpt2.tokenization_gpt2 import GPT2Tokenizer
 
@@ -41,6 +44,8 @@ def train(args):
             model = OPTLM(pretrained=args.pretrain, lora_rank=args.lora_rank).cuda()
         elif args.model == 'gpt2':
             model = GPTLM(pretrained=args.pretrain, lora_rank=args.lora_rank).cuda()
+        elif args.model == 'llama':
+            model = LlamaLM(pretrained=args.pretrain, lora_rank=args.lora_rank).cuda()
         else:
             raise ValueError(f'Unsupported model "{args.model}"')
 
@@ -53,9 +58,19 @@ def train(args):
         tokenizer.pad_token = tokenizer.eos_token
     elif args.model == 'opt':
         tokenizer = AutoTokenizer.from_pretrained("facebook/opt-350m")
+    elif args.model == 'llama':
+        tokenizer = AutoTokenizer.from_pretrained(
+            args.pretrain,
+            padding_side="right",
+            use_fast=False,
+        )
     else:
         raise ValueError(f'Unsupported model "{args.model}"')
-    tokenizer.pad_token = tokenizer.eos_token
+    
+    if args.model == 'llama':
+        tokenizer = prepare_llama_tokenizer_and_embedding(tokenizer, model)
+    else:
+        tokenizer.pad_token = tokenizer.eos_token
 
     max_len = 512
 
@@ -67,11 +82,19 @@ def train(args):
 
     logger = get_dist_logger()
 
-    train_data = load_dataset(args.dataset, 'super_natural_instructions', split='train')
-    eval_data = load_dataset(args.dataset, 'super_natural_instructions', split='test')
+    # configure dataset
+    if args.dataset == 'yizhongw/self_instruct':
+        train_data = load_dataset(args.dataset, 'super_natural_instructions', split='train')
+        eval_data = load_dataset(args.dataset, 'super_natural_instructions', split='test')
 
-    train_dataset = SFTDataset(train_data, tokenizer, max_len)
-    eval_dataset = SFTDataset(eval_data, tokenizer, max_len)
+        train_dataset = SFTDataset(train_data, tokenizer, max_len)
+        eval_dataset = SFTDataset(eval_data, tokenizer, max_len)
+
+    elif 'alpaca' in args.dataset:
+        train_dataset = AlpacaDataset(tokenizer=tokenizer, data_path=args.dataset)
+        eval_dataset = None
+        eval_dataset
+        data_collator = AlpacaDataCollator(tokenizer=tokenizer)
 
     if dist.is_initialized() and dist.get_world_size() > 1:
         sampler = DistributedSampler(train_dataset, shuffle=True, seed=42, drop_last=True)
@@ -79,11 +102,15 @@ def train(args):
     else:
         sampler = None
 
+    train_dataloader = DataLoader(train_dataset, shuffle=(sampler is None), sampler=sampler, batch_size=args.batch_size)
+    if eval_dataset is not None:
+        eval_dataloader = DataLoader(eval_dataset, batch_size=args.batch_size)
+
     trainer = SFTTrainer(model=model,
                          strategy=strategy,
                          optim=optim,
-                         train_dataset=train_dataset,
-                         eval_dataset=eval_dataset,
+                         train_dataloader=train_dataloader,
+                         eval_dataloader=eval_dataloader,
                          sampler=sampler,
                          batch_size=args.batch_size,
                          max_epochs=args.max_epochs)