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| from encoder.visualizations import Visualizations | |
| from encoder.data_objects import SpeakerVerificationDataLoader, SpeakerVerificationDataset | |
| from encoder.params_model import * | |
| from encoder.model import SpeakerEncoder | |
| from utils.profiler import Profiler | |
| from pathlib import Path | |
| import torch | |
| def sync(device: torch.device): | |
| # For correct profiling (cuda operations are async) | |
| if device.type == "cuda": | |
| torch.cuda.synchronize(device) | |
| def train(run_id: str, clean_data_root: Path, models_dir: Path, umap_every: int, save_every: int, | |
| backup_every: int, vis_every: int, force_restart: bool, visdom_server: str, | |
| no_visdom: bool): | |
| # Create a dataset and a dataloader | |
| dataset = SpeakerVerificationDataset(clean_data_root) | |
| loader = SpeakerVerificationDataLoader( | |
| dataset, | |
| speakers_per_batch, | |
| utterances_per_speaker, | |
| num_workers=8, | |
| ) | |
| # Setup the device on which to run the forward pass and the loss. These can be different, | |
| # because the forward pass is faster on the GPU whereas the loss is often (depending on your | |
| # hyperparameters) faster on the CPU. | |
| device = torch.device("cuda" if torch.cuda.is_available() else "cpu") | |
| # FIXME: currently, the gradient is None if loss_device is cuda | |
| loss_device = torch.device("cpu") | |
| # Create the model and the optimizer | |
| model = SpeakerEncoder(device, loss_device) | |
| optimizer = torch.optim.Adam(model.parameters(), lr=learning_rate_init) | |
| init_step = 1 | |
| # Configure file path for the model | |
| state_fpath = models_dir.joinpath(run_id + ".pt") | |
| backup_dir = models_dir.joinpath(run_id + "_backups") | |
| # Load any existing model | |
| if not force_restart: | |
| if state_fpath.exists(): | |
| print("Found existing model \"%s\", loading it and resuming training." % run_id) | |
| checkpoint = torch.load(state_fpath) | |
| init_step = checkpoint["step"] | |
| model.load_state_dict(checkpoint["model_state"]) | |
| optimizer.load_state_dict(checkpoint["optimizer_state"]) | |
| optimizer.param_groups[0]["lr"] = learning_rate_init | |
| else: | |
| print("No model \"%s\" found, starting training from scratch." % run_id) | |
| else: | |
| print("Starting the training from scratch.") | |
| model.train() | |
| # Initialize the visualization environment | |
| vis = Visualizations(run_id, vis_every, server=visdom_server, disabled=no_visdom) | |
| vis.log_dataset(dataset) | |
| vis.log_params() | |
| device_name = str(torch.cuda.get_device_name(0) if torch.cuda.is_available() else "CPU") | |
| vis.log_implementation({"Device": device_name}) | |
| # Training loop | |
| profiler = Profiler(summarize_every=10, disabled=False) | |
| for step, speaker_batch in enumerate(loader, init_step): | |
| profiler.tick("Blocking, waiting for batch (threaded)") | |
| # Forward pass | |
| inputs = torch.from_numpy(speaker_batch.data).to(device) | |
| sync(device) | |
| profiler.tick("Data to %s" % device) | |
| embeds = model(inputs) | |
| sync(device) | |
| profiler.tick("Forward pass") | |
| embeds_loss = embeds.view((speakers_per_batch, utterances_per_speaker, -1)).to(loss_device) | |
| loss, eer = model.loss(embeds_loss) | |
| sync(loss_device) | |
| profiler.tick("Loss") | |
| # Backward pass | |
| model.zero_grad() | |
| loss.backward() | |
| profiler.tick("Backward pass") | |
| model.do_gradient_ops() | |
| optimizer.step() | |
| profiler.tick("Parameter update") | |
| # Update visualizations | |
| # learning_rate = optimizer.param_groups[0]["lr"] | |
| vis.update(loss.item(), eer, step) | |
| # Draw projections and save them to the backup folder | |
| if umap_every != 0 and step % umap_every == 0: | |
| print("Drawing and saving projections (step %d)" % step) | |
| backup_dir.mkdir(exist_ok=True) | |
| projection_fpath = backup_dir.joinpath("%s_umap_%06d.png" % (run_id, step)) | |
| embeds = embeds.detach().cpu().numpy() | |
| vis.draw_projections(embeds, utterances_per_speaker, step, projection_fpath) | |
| vis.save() | |
| # Overwrite the latest version of the model | |
| if save_every != 0 and step % save_every == 0: | |
| print("Saving the model (step %d)" % step) | |
| torch.save({ | |
| "step": step + 1, | |
| "model_state": model.state_dict(), | |
| "optimizer_state": optimizer.state_dict(), | |
| }, state_fpath) | |
| # Make a backup | |
| if backup_every != 0 and step % backup_every == 0: | |
| print("Making a backup (step %d)" % step) | |
| backup_dir.mkdir(exist_ok=True) | |
| backup_fpath = backup_dir.joinpath("%s_bak_%06d.pt" % (run_id, step)) | |
| torch.save({ | |
| "step": step + 1, | |
| "model_state": model.state_dict(), | |
| "optimizer_state": optimizer.state_dict(), | |
| }, backup_fpath) | |
| profiler.tick("Extras (visualizations, saving)") | |