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309 lines
12 KiB
309 lines
12 KiB
import argparse
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import os
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import time
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import logging
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import torch
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import torch.nn as nn
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import torch.nn.parallel
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import torch.backends.cudnn as cudnn
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import torch.optim
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import torch.utils.data
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import models
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from torch.autograd import Variable
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from data import get_dataset
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from preprocess import get_transform
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from utils import *
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from datetime import datetime
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from ast import literal_eval
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from torchvision.utils import save_image
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model_names = sorted(name for name in models.__dict__
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if name.islower() and not name.startswith("__")
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and callable(models.__dict__[name]))
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<<<<<<< HEAD
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print(model_names)
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=======
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>>>>>>> 0d30f7b8e44285531022cdc05b2c11c22db27e3a
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parser = argparse.ArgumentParser(description='PyTorch ConvNet Training')
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parser.add_argument('--results_dir', metavar='RESULTS_DIR', default='./results',
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help='results dir')
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parser.add_argument('--save', metavar='SAVE', default='',
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help='saved folder')
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parser.add_argument('--dataset', metavar='DATASET', default='imagenet',
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help='dataset name or folder')
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parser.add_argument('--model', '-a', metavar='MODEL', default='alexnet',
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choices=model_names,
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help='model architecture: ' +
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' | '.join(model_names) +
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' (default: alexnet)')
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parser.add_argument('--input_size', type=int, default=None,
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help='image input size')
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parser.add_argument('--model_config', default='',
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help='additional architecture configuration')
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parser.add_argument('--type', default='torch.cuda.FloatTensor',
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help='type of tensor - e.g torch.cuda.HalfTensor')
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parser.add_argument('--gpus', default='0',
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help='gpus used for training - e.g 0,1,3')
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parser.add_argument('-j', '--workers', default=8, type=int, metavar='N',
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help='number of data loading workers (default: 8)')
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parser.add_argument('--epochs', default=2500, type=int, metavar='N',
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help='number of total epochs to run')
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parser.add_argument('--start-epoch', default=0, type=int, metavar='N',
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help='manual epoch number (useful on restarts)')
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parser.add_argument('-b', '--batch-size', default=256, type=int,
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metavar='N', help='mini-batch size (default: 256)')
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parser.add_argument('--optimizer', default='SGD', type=str, metavar='OPT',
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help='optimizer function used')
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parser.add_argument('--lr', '--learning_rate', default=0.1, type=float,
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metavar='LR', help='initial learning rate')
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parser.add_argument('--momentum', default=0.9, type=float, metavar='M',
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help='momentum')
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parser.add_argument('--weight-decay', '--wd', default=1e-4, type=float,
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metavar='W', help='weight decay (default: 1e-4)')
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parser.add_argument('--print-freq', '-p', default=10, type=int,
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metavar='N', help='print frequency (default: 10)')
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parser.add_argument('--resume', default='', type=str, metavar='PATH',
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help='path to latest checkpoint (default: none)')
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parser.add_argument('-e', '--evaluate', type=str, metavar='FILE',
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help='evaluate model FILE on validation set')
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def main():
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global args, best_prec1
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best_prec1 = 0
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args = parser.parse_args()
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if args.evaluate:
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args.results_dir = '/tmp'
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if args.save is '':
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args.save = datetime.now().strftime('%Y-%m-%d_%H-%M-%S')
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save_path = os.path.join(args.results_dir, args.save)
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if not os.path.exists(save_path):
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os.makedirs(save_path)
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setup_logging(os.path.join(save_path, 'log.txt'))
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results_file = os.path.join(save_path, 'results.%s')
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results = ResultsLog(results_file % 'csv', results_file % 'html')
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logging.info("saving to %s", save_path)
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logging.debug("run arguments: %s", args)
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if 'cuda' in args.type:
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args.gpus = [int(i) for i in args.gpus.split(',')]
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torch.cuda.set_device(args.gpus[0])
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cudnn.benchmark = True
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else:
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args.gpus = None
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# create model
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logging.info("creating model %s", args.model)
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model = models.__dict__[args.model]
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model_config = {'input_size': args.input_size, 'dataset': args.dataset}
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if args.model_config is not '':
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model_config = dict(model_config, **literal_eval(args.model_config))
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model = model(**model_config)
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logging.info("created model with configuration: %s", model_config)
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# optionally resume from a checkpoint
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if args.evaluate:
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if not os.path.isfile(args.evaluate):
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parser.error('invalid checkpoint: {}'.format(args.evaluate))
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checkpoint = torch.load(args.evaluate)
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model.load_state_dict(checkpoint['state_dict'])
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logging.info("loaded checkpoint '%s' (epoch %s)",
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args.evaluate, checkpoint['epoch'])
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elif args.resume:
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checkpoint_file = args.resume
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if os.path.isdir(checkpoint_file):
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results.load(os.path.join(checkpoint_file, 'results.csv'))
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checkpoint_file = os.path.join(
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checkpoint_file, 'model_best.pth.tar')
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if os.path.isfile(checkpoint_file):
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logging.info("loading checkpoint '%s'", args.resume)
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checkpoint = torch.load(checkpoint_file)
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args.start_epoch = checkpoint['epoch'] - 1
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best_prec1 = checkpoint['best_prec1']
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model.load_state_dict(checkpoint['state_dict'])
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logging.info("loaded checkpoint '%s' (epoch %s)",
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checkpoint_file, checkpoint['epoch'])
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else:
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logging.error("no checkpoint found at '%s'", args.resume)
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num_parameters = sum([l.nelement() for l in model.parameters()])
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logging.info("number of parameters: %d", num_parameters)
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# Data loading code
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default_transform = {
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'train': get_transform(args.dataset,
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input_size=args.input_size, augment=True),
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'eval': get_transform(args.dataset,
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input_size=args.input_size, augment=False)
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}
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transform = getattr(model, 'input_transform', default_transform)
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regime = getattr(model, 'regime', {0: {'optimizer': args.optimizer,
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'lr': args.lr,
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'momentum': args.momentum,
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'weight_decay': args.weight_decay}})
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# define loss function (criterion) and optimizer
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criterion = getattr(model, 'criterion', nn.CrossEntropyLoss)()
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criterion.type(args.type)
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model.type(args.type)
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val_data = get_dataset(args.dataset, 'val', transform['eval'])
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val_loader = torch.utils.data.DataLoader(
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val_data,
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batch_size=args.batch_size, shuffle=False,
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num_workers=args.workers, pin_memory=True)
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if args.evaluate:
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validate(val_loader, model, criterion, 0)
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return
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train_data = get_dataset(args.dataset, 'train', transform['train'])
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train_loader = torch.utils.data.DataLoader(
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train_data,
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batch_size=args.batch_size, shuffle=True,
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num_workers=args.workers, pin_memory=True)
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optimizer = torch.optim.SGD(model.parameters(), lr=args.lr)
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logging.info('training regime: %s', regime)
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for epoch in range(args.start_epoch, args.epochs):
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optimizer = adjust_optimizer(optimizer, epoch, regime)
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# train for one epoch
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train_loss, train_prec1, train_prec5 = train(
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train_loader, model, criterion, epoch, optimizer)
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# evaluate on validation set
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val_loss, val_prec1, val_prec5 = validate(
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val_loader, model, criterion, epoch)
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# remember best prec@1 and save checkpoint
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is_best = val_prec1 > best_prec1
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best_prec1 = max(val_prec1, best_prec1)
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save_checkpoint({
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'epoch': epoch + 1,
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'model': args.model,
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'config': args.model_config,
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'state_dict': model.state_dict(),
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'best_prec1': best_prec1,
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'regime': regime
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}, is_best, path=save_path)
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logging.info('\n Epoch: {0}\t'
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'Training Loss {train_loss:.4f} \t'
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'Training Prec@1 {train_prec1:.3f} \t'
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'Training Prec@5 {train_prec5:.3f} \t'
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'Validation Loss {val_loss:.4f} \t'
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'Validation Prec@1 {val_prec1:.3f} \t'
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'Validation Prec@5 {val_prec5:.3f} \n'
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.format(epoch + 1, train_loss=train_loss, val_loss=val_loss,
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train_prec1=train_prec1, val_prec1=val_prec1,
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train_prec5=train_prec5, val_prec5=val_prec5))
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results.add(epoch=epoch + 1, train_loss=train_loss, val_loss=val_loss,
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train_error1=100 - train_prec1, val_error1=100 - val_prec1,
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train_error5=100 - train_prec5, val_error5=100 - val_prec5)
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#results.plot(x='epoch', y=['train_loss', 'val_loss'],
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# title='Loss', ylabel='loss')
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#results.plot(x='epoch', y=['train_error1', 'val_error1'],
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# title='Error@1', ylabel='error %')
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#results.plot(x='epoch', y=['train_error5', 'val_error5'],
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# title='Error@5', ylabel='error %')
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results.save()
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def forward(data_loader, model, criterion, epoch=0, training=True, optimizer=None):
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if args.gpus and len(args.gpus) > 1:
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model = torch.nn.DataParallel(model, args.gpus)
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batch_time = AverageMeter()
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data_time = AverageMeter()
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losses = AverageMeter()
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top1 = AverageMeter()
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top5 = AverageMeter()
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end = time.time()
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for i, (inputs, target) in enumerate(data_loader):
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# measure data loading time
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data_time.update(time.time() - end)
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if args.gpus is not None:
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target = target.cuda()
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if not training:
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with torch.no_grad():
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input_var = Variable(inputs.type(args.type), volatile=not training)
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target_var = Variable(target)
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# compute output
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output = model(input_var)
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else:
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input_var = Variable(inputs.type(args.type), volatile=not training)
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target_var = Variable(target)
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# compute output
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output = model(input_var)
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loss = criterion(output, target_var)
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if type(output) is list:
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output = output[0]
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# measure accuracy and record loss
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prec1, prec5 = accuracy(output.data, target, topk=(1, 5))
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losses.update(loss.item(), inputs.size(0))
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top1.update(prec1.item(), inputs.size(0))
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top5.update(prec5.item(), inputs.size(0))
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if training:
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# compute gradient and do SGD step
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optimizer.zero_grad()
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loss.backward()
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for p in list(model.parameters()):
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if hasattr(p,'org'):
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p.data.copy_(p.org)
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optimizer.step()
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for p in list(model.parameters()):
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if hasattr(p,'org'):
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p.org.copy_(p.data.clamp_(-1,1))
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# measure elapsed time
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batch_time.update(time.time() - end)
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end = time.time()
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if i % args.print_freq == 0:
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logging.info('{phase} - Epoch: [{0}][{1}/{2}]\t'
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'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
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'Data {data_time.val:.3f} ({data_time.avg:.3f})\t'
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'Loss {loss.val:.4f} ({loss.avg:.4f})\t'
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'Prec@1 {top1.val:.3f} ({top1.avg:.3f})\t'
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'Prec@5 {top5.val:.3f} ({top5.avg:.3f})'.format(
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epoch, i, len(data_loader),
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phase='TRAINING' if training else 'EVALUATING',
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batch_time=batch_time,
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data_time=data_time, loss=losses, top1=top1, top5=top5))
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return losses.avg, top1.avg, top5.avg
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def train(data_loader, model, criterion, epoch, optimizer):
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# switch to train mode
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model.train()
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return forward(data_loader, model, criterion, epoch,
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training=True, optimizer=optimizer)
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def validate(data_loader, model, criterion, epoch):
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# switch to evaluate mode
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model.eval()
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return forward(data_loader, model, criterion, epoch,
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training=False, optimizer=None)
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if __name__ == '__main__':
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main()
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