# Copyright 2023-present the HuggingFace Inc. team. # # 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 argparse import logging import math import os import random from pathlib import Path import datasets import evaluate import torch import transformers from accelerate import Accelerator from accelerate.logging import get_logger from accelerate.utils import set_seed from datasets import DatasetDict, load_dataset from huggingface_hub import HfApi from torch import nn from torch.utils.data import DataLoader from tqdm import tqdm from transformers import AutoModel, AutoTokenizer, SchedulerType, default_data_collator, get_scheduler from peft import LoraConfig, TaskType, get_peft_model logger = get_logger(__name__) def parse_args(): parser = argparse.ArgumentParser(description="Training a PEFT model for Semantic Search task") parser.add_argument("--dataset_name", type=str, default=None, help="dataset name on HF hub") parser.add_argument( "--max_length", type=int, default=128, help=( "The maximum total input sequence length after tokenization. Sequences longer than this will be truncated," " sequences shorter will be padded if `--pad_to_max_length` is passed." ), ) parser.add_argument( "--model_name_or_path", type=str, help="Path to pretrained model or model identifier from huggingface.co/models.", required=True, ) parser.add_argument( "--per_device_train_batch_size", type=int, default=8, help="Batch size (per device) for the training dataloader.", ) parser.add_argument( "--per_device_eval_batch_size", type=int, default=8, help="Batch size (per device) for the evaluation dataloader.", ) parser.add_argument( "--learning_rate", type=float, default=5e-5, help="Initial learning rate (after the potential warmup period) to use.", ) parser.add_argument("--weight_decay", type=float, default=0.0, help="Weight decay to use.") parser.add_argument("--num_train_epochs", type=int, default=3, help="Total number of training epochs to perform.") parser.add_argument( "--max_train_steps", type=int, default=None, help="Total number of training steps to perform. If provided, overrides num_train_epochs.", ) parser.add_argument( "--gradient_accumulation_steps", type=int, default=1, help="Number of updates steps to accumulate before performing a backward/update pass.", ) parser.add_argument( "--lr_scheduler_type", type=SchedulerType, default="linear", help="The scheduler type to use.", choices=["linear", "cosine", "cosine_with_restarts", "polynomial", "constant", "constant_with_warmup"], ) parser.add_argument( "--num_warmup_steps", type=int, default=0, help="Number of steps for the warmup in the lr scheduler." ) parser.add_argument("--output_dir", type=str, default=None, help="Where to store the final model.") parser.add_argument("--seed", type=int, default=None, help="A seed for reproducible training.") parser.add_argument("--push_to_hub", action="store_true", help="Whether or not to push the model to the Hub.") parser.add_argument( "--hub_model_id", type=str, help="The name of the repository to keep in sync with the local `output_dir`." ) parser.add_argument("--hub_token", type=str, help="The token to use to push to the Model Hub.") parser.add_argument( "--checkpointing_steps", type=str, default=None, help="Whether the various states should be saved at the end of every n steps, or 'epoch' for each epoch.", ) parser.add_argument( "--resume_from_checkpoint", type=str, default=None, help="If the training should continue from a checkpoint folder.", ) parser.add_argument( "--with_tracking", action="store_true", help="Whether to enable experiment trackers for logging.", ) parser.add_argument( "--report_to", type=str, default="all", help=( 'The integration to report the results and logs to. Supported platforms are `"tensorboard"`,' ' `"wandb"`, `"comet_ml"` and `"clearml"`. Use `"all"` (default) to report to all integrations.' "Only applicable when `--with_tracking` is passed." ), ) parser.add_argument( "--sanity_test", action="store_true", help="Whether to enable sanity test.", ) parser.add_argument( "--use_peft", action="store_true", help="Whether to use PEFT.", ) args = parser.parse_args() if args.push_to_hub: assert args.output_dir is not None, "Need an `output_dir` to create a repo when `--push_to_hub` is passed." return args def save_model_hook(models, weights, output_dir): for i, model in enumerate(models): model.save_pretrained(output_dir, state_dict=weights[i]) # make sure to pop weight so that corresponding model is not saved again weights.pop() def load_model_hook(models, input_dir): while len(models) > 0: model = models.pop() # pop models so that they are not loaded again if hasattr(model, "active_adapter") and hasattr(model, "load_adapter"): model.load_adapter(input_dir, model.active_adapter, is_trainable=True) class AutoModelForSentenceEmbedding(nn.Module): def __init__(self, model_name, tokenizer, normalize=True): super().__init__() self.model = AutoModel.from_pretrained( model_name ) # , quantizaton_config=BitsAndBytesConfig(load_in_8bit=True), device_map={"":0}) self.normalize = normalize self.tokenizer = tokenizer def forward(self, **kwargs): model_output = self.model(**kwargs) embeddings = self.mean_pooling(model_output, kwargs["attention_mask"]) if self.normalize: embeddings = torch.nn.functional.normalize(embeddings, p=2, dim=1) return embeddings def mean_pooling(self, model_output, attention_mask): token_embeddings = model_output[0] # First element of model_output contains all token embeddings input_mask_expanded = attention_mask.unsqueeze(-1).expand(token_embeddings.size()).float() return torch.sum(token_embeddings * input_mask_expanded, 1) / torch.clamp(input_mask_expanded.sum(1), min=1e-9) def __getattr__(self, name: str): """Forward missing attributes to the wrapped module.""" try: return super().__getattr__(name) # defer to nn.Module's logic except AttributeError: if name == "model": # see #1892: prevent infinite recursion if class is not initialized raise return getattr(self.model, name) def get_cosing_embeddings(query_embs, product_embs): return torch.sum(query_embs * product_embs, axis=1) def get_loss(cosine_score, labels): return torch.mean(torch.square(labels * (1 - cosine_score) + torch.clamp((1 - labels) * cosine_score, min=0.0))) def main(): args = parse_args() accelerator_kwargs = {"gradient_accumulation_steps": args.gradient_accumulation_steps} if args.with_tracking: accelerator_kwargs["log_with"] = args.report_to accelerator_kwargs["project_dir"] = args.output_dir accelerator = Accelerator(**accelerator_kwargs) # Make one log on every process with the configuration for debugging. logging.basicConfig( format="%(asctime)s - %(levelname)s - %(name)s - %(message)s", datefmt="%m/%d/%Y %H:%M:%S", level=logging.INFO, ) logger.info(accelerator.state, main_process_only=False) if accelerator.is_local_main_process: datasets.utils.logging.set_verbosity_warning() transformers.utils.logging.set_verbosity_info() else: datasets.utils.logging.set_verbosity_error() transformers.utils.logging.set_verbosity_error() # If passed along, set the training seed now. if args.seed is not None: set_seed(args.seed) # Handle the repository creation if accelerator.is_main_process: if args.push_to_hub: api = HfApi(token=args.hub_token) # Create repo (repo_name from args or inferred) repo_name = args.hub_model_id if repo_name is None: repo_name = Path(args.output_dir).absolute().name repo_id = api.create_repo(repo_name, exist_ok=True).repo_id with open(os.path.join(args.output_dir, ".gitignore"), "w+") as gitignore: if "step_*" not in gitignore: gitignore.write("step_*\n") if "epoch_*" not in gitignore: gitignore.write("epoch_*\n") elif args.output_dir is not None: os.makedirs(args.output_dir, exist_ok=True) accelerator.wait_for_everyone() # get the tokenizer tokenizer = AutoTokenizer.from_pretrained(args.model_name_or_path) # dataset download and preprocessing if args.sanity_test: train_dataset = load_dataset("smangrul/amazon_esci", split="train[:1024]") val_dataset = load_dataset("smangrul/amazon_esci", split="validation[:1024]") dataset = DatasetDict({"train": train_dataset, "validation": val_dataset}) else: dataset = load_dataset(args.dataset_name, revision="main") def preprocess_function(examples): queries = examples["query"] result = tokenizer(queries, padding="max_length", max_length=70, truncation=True) result = {f"query_{k}": v for k, v in result.items()} products = examples["product_title"] result_products = tokenizer(products, padding="max_length", max_length=70, truncation=True) for k, v in result_products.items(): result[f"product_{k}"] = v result["labels"] = examples["relevance_label"] return result processed_datasets = dataset.map( preprocess_function, batched=True, remove_columns=dataset["train"].column_names, desc="Running tokenizer on dataset", ) # Log a few random samples from the training set: for index in random.sample(range(len(processed_datasets["train"])), 3): logger.info(f"Sample {index} of the training set: {processed_datasets['train'][index]}.") # base model model = AutoModelForSentenceEmbedding(args.model_name_or_path, tokenizer) if args.use_peft: # peft config and wrapping peft_config = LoraConfig( r=8, lora_alpha=16, bias="none", task_type=TaskType.FEATURE_EXTRACTION, target_modules=["key", "query", "value"], ) model = get_peft_model(model, peft_config) model.print_trainable_parameters() accelerator.print(model) # get dataloaders train_dataloader = DataLoader( processed_datasets["train"], shuffle=True, collate_fn=default_data_collator, batch_size=args.per_device_train_batch_size, pin_memory=True, ) eval_dataloader = DataLoader( processed_datasets["validation"], shuffle=False, collate_fn=default_data_collator, batch_size=args.per_device_eval_batch_size, pin_memory=True, ) optimizer = torch.optim.Adam(model.parameters(), lr=args.learning_rate) # Scheduler and math around the number of training steps. overrode_max_train_steps = False num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) if args.max_train_steps is None: args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch overrode_max_train_steps = True lr_scheduler = get_scheduler( name=args.lr_scheduler_type, optimizer=optimizer, num_warmup_steps=args.num_warmup_steps, num_training_steps=args.max_train_steps, ) # Prepare everything with our `accelerator`. model, optimizer, train_dataloader, eval_dataloader, lr_scheduler = accelerator.prepare( model, optimizer, train_dataloader, eval_dataloader, lr_scheduler ) # We need to recalculate our total training steps as the size of the training dataloader may have changed num_update_steps_per_epoch = math.ceil(len(train_dataloader) / args.gradient_accumulation_steps) if overrode_max_train_steps: args.max_train_steps = args.num_train_epochs * num_update_steps_per_epoch # Afterwards we recalculate our number of training epochs args.num_train_epochs = math.ceil(args.max_train_steps / num_update_steps_per_epoch) # Figure out how many steps we should save the Accelerator states checkpointing_steps = args.checkpointing_steps if checkpointing_steps is not None and checkpointing_steps.isdigit(): checkpointing_steps = int(checkpointing_steps) # We need to initialize the trackers we use, and also store our configuration. # The trackers initializes automatically on the main process. if args.with_tracking: experiment_config = vars(args) # TensorBoard cannot log Enums, need the raw value experiment_config["lr_scheduler_type"] = experiment_config["lr_scheduler_type"].value accelerator.init_trackers("peft_semantic_search", experiment_config) metric = evaluate.load("roc_auc") total_batch_size = args.per_device_train_batch_size * accelerator.num_processes * args.gradient_accumulation_steps if args.use_peft: # saving and loading checkpoints for resuming training accelerator.register_save_state_pre_hook(save_model_hook) accelerator.register_load_state_pre_hook(load_model_hook) logger.info("***** Running training *****") logger.info(f" Num examples = {len(processed_datasets['train'])}") logger.info(f" Num Epochs = {args.num_train_epochs}") logger.info(f" Instantaneous batch size per device = {args.per_device_train_batch_size}") logger.info(f" Total train batch size (w. parallel, distributed & accumulation) = {total_batch_size}") logger.info(f" Gradient Accumulation steps = {args.gradient_accumulation_steps}") logger.info(f" Total optimization steps = {args.max_train_steps}") # Only show the progress bar once on each machine. progress_bar = tqdm(range(args.max_train_steps), disable=not accelerator.is_local_main_process) completed_steps = 0 starting_epoch = 0 # Potentially load in the weights and states from a previous save if args.resume_from_checkpoint: if args.resume_from_checkpoint is not None or args.resume_from_checkpoint != "": accelerator.print(f"Resumed from checkpoint: {args.resume_from_checkpoint}") accelerator.load_state(args.resume_from_checkpoint) path = os.path.basename(args.resume_from_checkpoint) else: # Get the most recent checkpoint dirs = [f.name for f in os.scandir(os.getcwd()) if f.is_dir()] dirs.sort(key=os.path.getctime) path = dirs[-1] # Sorts folders by date modified, most recent checkpoint is the last # Extract `epoch_{i}` or `step_{i}` training_difference = os.path.splitext(path)[0] if "epoch" in training_difference: starting_epoch = int(training_difference.replace("epoch_", "")) + 1 resume_step = None completed_steps = starting_epoch * num_update_steps_per_epoch else: # need to multiply `gradient_accumulation_steps` to reflect real steps resume_step = int(training_difference.replace("step_", "")) * args.gradient_accumulation_steps starting_epoch = resume_step // len(train_dataloader) resume_step -= starting_epoch * len(train_dataloader) completed_steps = resume_step // args.gradient_accumulation_steps # update the progress_bar if load from checkpoint progress_bar.update(completed_steps) for epoch in range(starting_epoch, args.num_train_epochs): model.train() total_loss = 0 if args.resume_from_checkpoint and epoch == starting_epoch and resume_step is not None: # We skip the first `n` batches in the dataloader when resuming from a checkpoint active_dataloader = accelerator.skip_first_batches(train_dataloader, resume_step) else: active_dataloader = train_dataloader for step, batch in enumerate(active_dataloader): with accelerator.accumulate(model): query_embs = model(**{k.replace("query_", ""): v for k, v in batch.items() if "query" in k}) product_embs = model(**{k.replace("product_", ""): v for k, v in batch.items() if "product" in k}) loss = get_loss(get_cosing_embeddings(query_embs, product_embs), batch["labels"]) total_loss += accelerator.reduce(loss.detach().float(), reduction="sum") accelerator.backward(loss) optimizer.step() lr_scheduler.step() model.zero_grad() # Checks if the accelerator has performed an optimization step behind the scenes if accelerator.sync_gradients: progress_bar.update(1) completed_steps += 1 if (step + 1) % 100 == 0: logger.info(f"Step: {step + 1}, Loss: {total_loss / (step + 1)}") if args.with_tracking: accelerator.log({"train/loss": total_loss / (step + 1)}, step=completed_steps) if isinstance(checkpointing_steps, int): if completed_steps % checkpointing_steps == 0: output_dir = f"step_{completed_steps}" if args.output_dir is not None: output_dir = os.path.join(args.output_dir, output_dir) accelerator.save_state(output_dir) if completed_steps >= args.max_train_steps: break model.eval() for step, batch in enumerate(eval_dataloader): with torch.no_grad(): query_embs = model(**{k.replace("query_", ""): v for k, v in batch.items() if "query" in k}) product_embs = model(**{k.replace("product_", ""): v for k, v in batch.items() if "product" in k}) prediction_scores = get_cosing_embeddings(query_embs, product_embs) prediction_scores, references = accelerator.gather_for_metrics((prediction_scores, batch["labels"])) metric.add_batch( prediction_scores=prediction_scores, references=references, ) result = metric.compute() result = {f"eval/{k}": v for k, v in result.items()} # Use accelerator.print to print only on the main process. accelerator.print(f"epoch {epoch}:", result) if args.with_tracking: result["train/epoch_loss"] = total_loss.item() / len(train_dataloader) accelerator.log(result, step=completed_steps) if args.output_dir is not None: accelerator.wait_for_everyone() if accelerator.is_main_process: if isinstance(checkpointing_steps, str): accelerator.save_state(os.path.join(args.output_dir, f"epoch_{epoch}")) accelerator.unwrap_model(model).save_pretrained( args.output_dir, state_dict=accelerator.get_state_dict(accelerator.unwrap_model(model)) ) tokenizer.save_pretrained(args.output_dir) if args.push_to_hub: commit_message = ( f"Training in progress epoch {epoch}" if epoch < args.num_train_epochs - 1 else "End of training" ) api.upload_folder( repo_id=repo_id, folder_path=args.output_dir, commit_message=commit_message, run_as_future=True, ) accelerator.wait_for_everyone() accelerator.end_training() if __name__ == "__main__": main()