| | |
| | | import math |
| | | import os |
| | | import time |
| | | import torch |
| | |
| | | """ |
| | | |
| | | self.output_dir = output_dir |
| | | if not os.path.exists(self.output_dir): |
| | | os.makedirs(self.output_dir, exist_ok=True) |
| | | self.resume = kwargs.get('resume', True) |
| | | self.start_epoch = 0 |
| | | self.max_epoch = kwargs.get('max_epoch', 100) |
| | |
| | | # scaler = ShardedGradScaler(enabled=use_fp16) if use_fsdp else scaler |
| | | # self.scaler = scaler |
| | | self.save_checkpoint_interval = kwargs.get("save_checkpoint_interval", 5000) |
| | | self.keep_nbest_models = kwargs.get("keep_nbest_models", -1) |
| | | self.accum_grad = kwargs.get("accum_grad", 1) |
| | | self.grad_clip = kwargs.get("grad_clip", 10.0) |
| | | self.grad_clip_type = kwargs.get("grad_clip_type", 2.0) |
| | |
| | | logging.warning("distributed is not initialized, only single shard") |
| | | self.rank = rank |
| | | self.world_size = world_size |
| | | self.train_acc_avg = 0.0 |
| | | self.train_loss_avg = 0.0 |
| | | self.val_acc_avg = 0.0 |
| | | self.val_loss_avg = 0.0 |
| | | self.best_acc_idx = 0 |
| | | self.saved_ckpts = {} |
| | | self.val_acc_list = [] |
| | | self.step_or_epoch = -1 |
| | | |
| | | |
| | | |
| | | |
| | |
| | | Args: |
| | | epoch (int): The epoch number at which the checkpoint is being saved. |
| | | """ |
| | | |
| | | if self.rank == 0: |
| | | logging.info(f"Save checkpoint: {epoch}, rank: {self.local_rank}\n") |
| | | self.step_or_epoch += 1 |
| | | state = { |
| | | 'epoch': epoch, |
| | | 'state_dict': model.state_dict(), |
| | | 'optimizer': optim.state_dict(), |
| | | 'scheduler': scheduler.state_dict(), |
| | | "acc": self.val_acc_list, |
| | | "step_or_epoch": self.step_or_epoch, |
| | | } |
| | | if hasattr(model, "module"): |
| | | state["state_dict"] = model.module.state_dict() |
| | | |
| | | if scaler: |
| | | state["scaler_state"] = scaler.state_dict() |
| | | # Create output directory if it does not exist |
| | | os.makedirs(self.output_dir, exist_ok=True) |
| | | if step is None: |
| | | filename = os.path.join(self.output_dir, f'model.pt.ep{epoch}') |
| | | ckpt_name = f'model.pt.ep{epoch}' |
| | | else: |
| | | filename = os.path.join(self.output_dir, f'model.pt.ep{epoch}.{step}') |
| | | |
| | | ckpt_name = f'model.pt.ep{epoch}.{step}' |
| | | filename = os.path.join(self.output_dir, ckpt_name) |
| | | torch.save(state, filename) |
| | | |
| | | print(f'\nCheckpoint saved to {filename}\n') |
| | | logging.info(f'\nCheckpoint saved to {filename}\n') |
| | | latest = Path(os.path.join(self.output_dir, f'model.pt')) |
| | | torch.save(state, latest) |
| | | |
| | | if self.val_acc_list[self.step_or_epoch] >= self.val_acc_list[self.best_acc_idx]: |
| | | self.best_acc_idx = self.step_or_epoch |
| | | best_ckpt = Path(os.path.join(self.output_dir, f'model.pt.best')) |
| | | torch.save(state, best_ckpt) |
| | | logging.info(f"Update best acc: {self.val_acc_list[self.best_acc_idx]}, {best_ckpt}") |
| | | else: |
| | | logging.info(f"No improvement in acc: {self.val_acc_list[self.best_acc_idx]}") |
| | | |
| | | if self.keep_nbest_models > 0: |
| | | self.saved_ckpts[ckpt_name] = self.val_acc_list[-1] |
| | | if len(self.saved_ckpts) > self.keep_nbest_models: |
| | | |
| | | min_key = min(self.saved_ckpts, key=self.saved_ckpts.get) |
| | | if min_key in self.saved_ckpts: |
| | | del self.saved_ckpts[min_key] |
| | | filename = os.path.join(self.output_dir, min_key) |
| | | logging.info(f"Delete: {filename}") |
| | | if os.path.exists(filename): |
| | | os.remove(filename) |
| | | |
| | | if self.use_ddp or self.use_fsdp: |
| | | dist.barrier() |
| | |
| | | scheduler.load_state_dict(checkpoint['scheduler']) |
| | | if scaler is not None and 'scaler_state' in checkpoint: |
| | | scaler.load_state_dict(checkpoint['scaler_state']) |
| | | |
| | | self.val_acc_list = checkpoint["acc"] |
| | | self.step_or_epoch = checkpoint["step_or_epoch"] |
| | | |
| | | print(f"Checkpoint loaded successfully from '{ckpt}'") |
| | | else: |
| | | print(f"No checkpoint found at '{ckpt}', does not resume status!") |
| | |
| | | if self.use_ddp or self.use_fsdp: |
| | | dist.barrier() |
| | | |
| | | # def train(self): |
| | | # """ |
| | | # Starts the training process, iterating over epochs, training the model, |
| | | # and saving checkpoints at the end of each epoch. |
| | | # """ |
| | | # if self.resume: |
| | | # self.resume_checkpoint(self.output_dir) |
| | | # |
| | | # for epoch in range(self.start_epoch, self.max_epoch + 1): |
| | | # time1 = time.perf_counter() |
| | | # self.train_epoch(epoch) |
| | | # |
| | | # |
| | | # |
| | | # if self.use_ddp or self.use_fsdp: |
| | | # dist.barrier() |
| | | # |
| | | # self._validate_epoch(epoch) |
| | | # |
| | | # if self.use_ddp or self.use_fsdp: |
| | | # dist.barrier() |
| | | # |
| | | # |
| | | # if self.rank == 0: |
| | | # self._save_checkpoint(epoch) |
| | | # |
| | | # if self.use_ddp or self.use_fsdp: |
| | | # dist.barrier() |
| | | # |
| | | # self.scheduler.step() |
| | | # |
| | | # time2 = time.perf_counter() |
| | | # time_escaped = (time2 - time1)/3600.0 |
| | | # print(f"\nrank: {self.local_rank}, time_escaped_epoch: {time_escaped:.3f} hours, estimated to finish {self.max_epoch} epoch: {(self.max_epoch-epoch)*time_escaped:.3f} hours\n") |
| | | # |
| | | # if self.rank == 0: |
| | | # average_checkpoints(self.output_dir, self.avg_nbest_model) |
| | | # |
| | | # if self.use_ddp or self.use_fsdp: |
| | | # dist.barrier() |
| | | # |
| | | # |
| | | # if writer: |
| | | # writer.close() |
| | | # |
| | | |
| | | def train_epoch(self, |
| | | model=None, |
| | |
| | | Args: |
| | | epoch (int): The current epoch number. |
| | | """ |
| | | logging.info(f"Train epoch: {epoch}, rank: {self.local_rank}\n") |
| | | model.train() |
| | | |
| | | |
| | | # Set the number of steps for gradient accumulation |
| | | accum_grad = self.accum_grad |
| | |
| | | time4 = time.perf_counter() |
| | | speed_stats["backward_time"] = f"{time4 - time3:0.3f}" |
| | | |
| | | self.train_loss_avg = (self.train_loss_avg*batch_idx + loss.detach().cpu().item())/(batch_idx+1) |
| | | if "acc" in stats: |
| | | self.train_acc_avg = (self.train_acc_avg * batch_idx + stats["acc"].detach().cpu().item()) / (batch_idx + 1) |
| | | if self.use_ddp or self.use_fsdp: |
| | | train_loss_avg = torch.tensor(self.train_loss_avg, dtype=torch.float32).to(self.device) |
| | | train_acc_avg = torch.tensor(self.train_acc_avg, dtype=torch.float32).to(self.device) |
| | | dist.all_reduce(train_loss_avg, op=dist.ReduceOp.SUM) |
| | | dist.all_reduce(train_acc_avg, op=dist.ReduceOp.SUM) |
| | | self.train_loss_avg = train_loss_avg.detach().cpu().item() / self.world_size |
| | | self.train_acc_avg = train_acc_avg.detach().cpu().item() / self.world_size |
| | | |
| | | |
| | | # Perform an optimizer step only after accumulating enough gradients |
| | | if (batch_idx + 1) % accum_grad == 0: |
| | | # Perform gradient clipping if it is set |
| | |
| | | |
| | | speed_stats["total_time"] = total_time |
| | | lr = scheduler.get_last_lr()[0] |
| | | |
| | | batch_num_epoch = -1 |
| | | if hasattr(dataloader_train, "__len__"): |
| | | batch_num_epoch = len(dataloader_train) |
| | | self.log(epoch, batch_idx, |
| | | batch_num_epoch=len(dataloader_train), |
| | | batch_num_epoch=batch_num_epoch, |
| | | lr=lr, |
| | | loss=loss.detach().cpu().item(), |
| | | speed_stats=speed_stats, |
| | |
| | | writer=writer |
| | | ) |
| | | |
| | | if (batch_idx+1) % self.save_checkpoint_interval == 0 and self.rank == 0: |
| | | if (batch_idx+1) % self.save_checkpoint_interval == 0: |
| | | self.save_checkpoint(epoch, model=model, optim=optim, scheduler=scheduler, scaler=scaler, step=batch_idx+1) |
| | | |
| | | |
| | |
| | | Args: |
| | | epoch (int): The current epoch number. |
| | | """ |
| | | logging.info(f"Validate epoch: {epoch}, rank: {self.local_rank}\n") |
| | | model.eval() |
| | | |
| | | with torch.no_grad(): |
| | |
| | | loss = loss |
| | | time4 = time.perf_counter() |
| | | |
| | | self.val_loss_avg = (self.val_loss_avg*batch_idx + loss.detach().cpu().item())/(batch_idx+1) |
| | | if "acc" in stats: |
| | | self.val_acc_avg = (self.val_acc_avg * batch_idx + stats["acc"].detach().cpu().item()) / (batch_idx + 1) |
| | | if self.use_ddp or self.use_fsdp: |
| | | val_loss_avg = torch.tensor(self.val_loss_avg, dtype=torch.float32).to(self.device) |
| | | val_acc_avg = torch.tensor(self.val_acc_avg, dtype=torch.float32).to(self.device) |
| | | dist.all_reduce(val_loss_avg, op=dist.ReduceOp.SUM) |
| | | dist.all_reduce(val_acc_avg, op=dist.ReduceOp.SUM) |
| | | self.val_loss_avg = val_loss_avg.detach().cpu().item() / self.world_size |
| | | self.val_acc_avg = val_acc_avg.detach().cpu().item() / self.world_size |
| | | |
| | | batch_num_epoch = -1 |
| | | if hasattr(dataloader_val, "__len__"): |
| | | batch_num_epoch = len(dataloader_val) |
| | | self.log(epoch, batch_idx, |
| | | batch_num_epoch=len(dataloader_val), |
| | | batch_num_epoch=batch_num_epoch, |
| | | lr=0.0, |
| | | loss=loss.detach().cpu().item(), |
| | | speed_stats=speed_stats, |
| | | stats=stats, |
| | | writer=writer, |
| | | tag="train", |
| | | tag="val", |
| | | ) |
| | | |
| | | self.val_acc_list.append(self.val_acc_avg) |
| | | model.train() |
| | | |
| | | if self.use_ddp or self.use_fsdp: |
| | | dist.barrier() |
| | | |
| | | |
| | | def log(self, |
| | |
| | | |
| | | if (batch_idx + 1) % self.log_interval == 0: |
| | | |
| | | gpu_info = "GPU, memory: {:.3f} GB, " \ |
| | | "{:.3f} GB, " \ |
| | | "{:.3f} GB, " \ |
| | | "{:.3f} GB".format(torch.cuda.memory_allocated() / 1024 / 1024 / 1024, |
| | | gpu_info = "GPU, memory: usage: {:.3f} GB, " \ |
| | | "peak: {:.3f} GB, " \ |
| | | "cache: {:.3f} GB, " \ |
| | | "cache_peak: {:.3f} GB".format(torch.cuda.memory_allocated() / 1024 / 1024 / 1024, |
| | | torch.cuda.max_memory_allocated() / 1024 / 1024 / 1024, |
| | | torch.cuda.memory_reserved() / 1024 / 1024 / 1024, |
| | | torch.cuda.max_memory_reserved() / 1024 / 1024 / 1024, |
| | | ) |
| | | |
| | | time_now = datetime.now() |
| | | time_now = time_now.strftime("%Y-%m-%d %H:%M:%S") |
| | | loss_avg_epoch = getattr(self, f"{tag}_loss_avg") |
| | | acc_avg_epoch = getattr(self, f"{tag}_acc_avg") |
| | | description = ( |
| | | f"{time_now}, " |
| | | f"{tag}, " |
| | | f"rank: {self.local_rank}, " |
| | | f"epoch: {epoch}/{self.max_epoch}, " |
| | | f"step: {batch_idx + 1}/{batch_num_epoch}, total step: {self.batch_total}, " |
| | | f"(loss: {loss:.3f}), " |
| | | f"(loss_avg_rank: {loss:.3f}), " |
| | | f"(loss_avg_epoch: {loss_avg_epoch:.3f}), " |
| | | f"(ppl_avg_epoch: {math.exp(loss_avg_epoch):.3f}), " |
| | | f"(acc_avg_epoch: {acc_avg_epoch:.3f}), " |
| | | f"(lr: {lr:.3e}), " |
| | | f"{[(k, round(v.cpu().item(), 3)) for k, v in stats.items()]}, " |
| | | f"{[(k, round(v.detach().cpu().item(), 3)) for k, v in stats.items()]}, " |
| | | f"{speed_stats}, " |
| | | f"{gpu_info}" |
| | | ) |
| | | logging.info(description) |
| | | |
| | | if writer is not None: |
| | | writer.add_scalar(f'rank{self.local_rank}_Loss/{tag}', loss, self.batch_total) |
| | | writer.add_scalar(f'rank{self.local_rank}_loss/{tag}', loss, self.batch_total) |
| | | writer.add_scalar(f'rank{self.local_rank}_lr/{tag}', lr, self.batch_total) |
| | | writer.add_scalar(f'rank{self.local_rank}_lr/{tag}', lr, self.batch_total) |
| | | for key, var in stats.items(): |
| | | writer.add_scalar(f'rank{self.local_rank}_{key}/{tag}', var.item(), self.batch_total) |
| | | writer.add_scalar(f'stats_rank{self.local_rank}_{key}/{tag}', var.item(), self.batch_total) |
| | | for key, var in speed_stats.items(): |
| | | writer.add_scalar(f'rank{self.local_rank}_{key}/{tag}', eval(var), self.batch_total) |
| | | writer.add_scalar(f'stats_rank{self.local_rank}_{key}/{tag}', eval(var), self.batch_total) |
| | | |
| | | def close(self, writer=None): |
| | | |
| | | if self.use_ddp or self.use_fsdp: |
| | | dist.barrier() |
| | | |
| | | if writer is not None: |
| | | writer.close() |
| | | |