forked from mrq/DL-Art-School
Add "pure" evaluator
Which simply computes the training loss against an eval dataset
This commit is contained in:
James Betker
parent
080bea2f19
commit
82fc69abfa
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@ -150,7 +150,7 @@ class Attention(nn.Module):
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out = torch.einsum('b h i j, b h j d -> b h i d', attn, v)
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out = rearrange(out, 'b h n d -> b n (h d)')
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out = self.to_out(out)
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out = self.to_out(out)
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return out
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@ -138,6 +138,11 @@ class Trainer:
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### Evaluators
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self.evaluators = []
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if 'eval' in opt.keys() and 'evaluators' in opt['eval'].keys():
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# In "pure" mode, we propagate through the normal training steps, but use validation data instead and average
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# the total loss. A validation dataloader is required.
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if opt_get(opt, ['eval', 'pure'], False):
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assert hasattr(self, 'val_loader')
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for ev_key, ev_opt in opt['eval']['evaluators'].items():
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self.evaluators.append(create_evaluator(self.model.networks[ev_opt['for']],
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ev_opt, self.model.env))
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@ -213,50 +218,27 @@ class Trainer:
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shutil.copytree(self.tb_logger_path, alt_tblogger)
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#### validation
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if opt['datasets'].get('val', None) and self.current_step % opt['train']['val_freq'] == 0:
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if opt['model'] in ['sr', 'srgan', 'corruptgan', 'spsrgan',
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'extensibletrainer'] and self.rank <= 0: # image restoration validation
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avg_psnr = 0.
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avg_fea_loss = 0.
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idx = 0
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val_tqdm = tqdm(self.val_loader)
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for val_data in val_tqdm:
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idx += 1
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for b in range(len(val_data['HQ_path'])):
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img_name = os.path.splitext(os.path.basename(val_data['HQ_path'][b]))[0]
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img_dir = os.path.join(opt['path']['val_images'], img_name)
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util.mkdir(img_dir)
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self.model.feed_data(val_data, self.current_step)
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self.model.test()
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visuals = self.model.get_current_visuals()
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if visuals is None:
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continue
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sr_img = util.tensor2img(visuals['rlt'][b]) # uint8
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# calculate PSNR
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if self.val_compute_psnr:
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gt_img = util.tensor2img(visuals['hq'][b]) # uint8
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sr_img, gt_img = util.crop_border([sr_img, gt_img], opt['scale'])
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avg_psnr += util.calculate_psnr(sr_img, gt_img)
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# Save SR images for reference
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img_base_name = '{:s}_{:d}.png'.format(img_name, self.current_step)
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save_img_path = os.path.join(img_dir, img_base_name)
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util.save_img(sr_img, save_img_path)
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avg_psnr = avg_psnr / idx
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avg_fea_loss = avg_fea_loss / idx
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# log
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self.logger.info('# Validation # PSNR: {:.4e} Fea: {:.4e}'.format(avg_psnr, avg_fea_loss))
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# tensorboard logger
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if opt['use_tb_logger'] and 'debug' not in opt['name'] and self.rank <= 0:
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self.tb_logger.add_scalar('val_psnr', avg_psnr, self.current_step)
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self.tb_logger.add_scalar('val_fea', avg_fea_loss, self.current_step)
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if opt_get(opt, ['eval', 'pure'], False) and self.current_step % opt['train']['val_freq'] == 0:
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metrics = []
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for val_data in tqdm(self.val_loader):
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self.model.feed_data(val_data, self.current_step)
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metrics.append(self.model.test())
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reduced_metrics = {}
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for metric in metrics:
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for k, v in metric.as_dict().items():
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if isinstance(v, torch.Tensor) and len(v.shape) == 0:
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if k in reduced_metrics.keys():
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reduced_metrics[k].append(v)
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else:
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reduced_metrics[k] = [v]
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if self.rank <= 0:
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for k, v in reduced_metrics.items():
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val = torch.stack(v).mean().item()
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self.tb_logger.add_scalar(k, val, self.current_step)
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print(f">>Eval {k}: {val}")
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if opt['wandb']:
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import wandb
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wandb.log({k: torch.stack(v).mean().item() for k,v in reduced_metrics.items()})
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if len(self.evaluators) != 0 and self.current_step % opt['train']['val_freq'] == 0:
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eval_dict = {}
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@ -300,7 +282,7 @@ class Trainer:
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument('-opt', type=str, help='Path to option YAML file.', default='../options/train_lrdvae_audio_lj.yml')
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parser.add_argument('-opt', type=str, help='Path to option YAML file.', default='../options/train_gpt_tts_lj.yml')
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parser.add_argument('--launcher', choices=['none', 'pytorch'], default='none', help='job launcher')
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parser.add_argument('--local_rank', type=int, default=0)
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args = parser.parse_args()
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@ -14,6 +14,7 @@ from trainer.steps import ConfigurableStep
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from trainer.experiments.experiments import get_experiment_for_name
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import torchvision.utils as utils
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from utils.loss_accumulator import LossAccumulator, InfStorageLossAccumulator
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from utils.util import opt_get, denormalize
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logger = logging.getLogger('base')
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@ -312,6 +313,7 @@ class ExtensibleTrainer(BaseModel):
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for net in self.netsG.values():
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net.eval()
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accum_metrics = InfStorageLossAccumulator()
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with torch.no_grad():
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# This can happen one of two ways: Either a 'validation injector' is provided, in which case we run that.
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# Or, we run the entire chain of steps in "train" mode and use eval.output_state.
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@ -327,7 +329,7 @@ class ExtensibleTrainer(BaseModel):
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# Iterate through the steps, performing them one at a time.
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state = self.dstate
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for step_num, s in enumerate(self.steps):
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ns = s.do_forward_backward(state, 0, step_num, train=False)
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ns = s.do_forward_backward(state, 0, step_num, train=False, loss_accumulator=accum_metrics)
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for k, v in ns.items():
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state[k] = [v]
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@ -340,6 +342,7 @@ class ExtensibleTrainer(BaseModel):
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for net in self.netsG.values():
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net.train()
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return accum_metrics
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# Fetches a summary of the log.
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def get_current_log(self, step):
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@ -165,12 +165,13 @@ class ConfigurableStep(Module):
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# Performs all forward and backward passes for this step given an input state. All input states are lists of
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# chunked tensors. Use grad_accum_step to dereference these steps. Should return a dict of tensors that later
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# steps might use. These tensors are automatically detached and accumulated into chunks.
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def do_forward_backward(self, state, grad_accum_step, amp_loss_id, train=True, no_ddp_sync=False):
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def do_forward_backward(self, state, grad_accum_step, amp_loss_id, train=True, no_ddp_sync=False, loss_accumulator=None):
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local_state = {} # <-- Will store the entire local state to be passed to injectors & losses.
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new_state = {} # <-- Will store state values created by this step for returning to ExtensibleTrainer.
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for k, v in state.items():
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local_state[k] = v[grad_accum_step]
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local_state['train_nets'] = str(self.get_networks_trained())
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loss_accumulator = self.loss_accumulator if loss_accumulator is None else loss_accumulator
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# Some losses compute backward() internally. Accommodate this by stashing the amp_loss_id in env.
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self.env['amp_loss_id'] = amp_loss_id
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@ -204,7 +205,7 @@ class ConfigurableStep(Module):
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local_state.update(injected)
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new_state.update(injected)
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if train and len(self.losses) > 0:
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if len(self.losses) > 0:
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# Finally, compute the losses.
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total_loss = 0
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for loss_name, loss in self.losses.items():
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@ -223,14 +224,14 @@ class ConfigurableStep(Module):
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total_loss += l * self.weights[loss_name]
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# Record metrics.
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if isinstance(l, torch.Tensor):
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self.loss_accumulator.add_loss(loss_name, l)
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loss_accumulator.add_loss(loss_name, l)
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for n, v in loss.extra_metrics():
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self.loss_accumulator.add_loss("%s_%s" % (loss_name, n), v)
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loss_accumulator.add_loss("%s_%s" % (loss_name, n), v)
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loss.clear_metrics()
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# In some cases, the loss could not be set (e.g. all losses have 'after')
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if isinstance(total_loss, torch.Tensor):
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self.loss_accumulator.add_loss("%s_total" % (self.get_training_network_name(),), total_loss)
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if train and isinstance(total_loss, torch.Tensor):
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loss_accumulator.add_loss("%s_total" % (self.get_training_network_name(),), total_loss)
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reset_required = total_loss < self.min_total_loss
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# Scale the loss down by the accumulation factor.
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@ -245,7 +246,7 @@ class ConfigurableStep(Module):
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# way to simply bypass backward. If you want a more efficient way to specify a min_loss, use or
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# implement it at the loss level.
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self.get_network_for_name(self.step_opt['training']).zero_grad()
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self.loss_accumulator.increment_metric("%s_skipped_steps" % (self.get_training_network_name(),))
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loss_accumulator.increment_metric("%s_skipped_steps" % (self.get_training_network_name(),))
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self.grads_generated = True
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@ -43,4 +43,38 @@ class LossAccumulator:
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result["loss_" + k] = torch.mean(buf[:i])
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for k, v in self.counters.items():
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result[k] = v
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return result
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# Stores losses in an infinitely-sized list.
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class InfStorageLossAccumulator:
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def __init__(self):
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self.buffers = {}
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def add_loss(self, name, tensor):
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if name not in self.buffers.keys():
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if "_histogram" in name:
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tensor = torch.flatten(tensor.detach().cpu())
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self.buffers[name] = []
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else:
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self.buffers[name] = []
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buf = self.buffers[name]
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# Can take tensors or just plain python numbers.
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if '_histogram' in name:
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buf.append(torch.flatten(tensor.detach().cpu()))
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elif isinstance(tensor, torch.Tensor):
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buf.append(tensor.detach().cpu())
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else:
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buf.append(tensor)
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def increment_metric(self, name):
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pass
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def as_dict(self):
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result = {}
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for k, buf in self.buffers.items():
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if '_histogram' in k:
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result["loss_" + k] = torch.flatten(buf)
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else:
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result["loss_" + k] = torch.mean(torch.stack(buf))
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return result
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