def test_cifar(self):
from inferno.trainers.basic import Trainer
from inferno.io.box.cifar import get_cifar10_loaders
# Build cifar10 loaders
trainloader, testloader = get_cifar10_loaders(
root_directory=join(self.ROOT_DIR, 'data'),
download=self.DOWNLOAD_CIFAR)
# Make model
net = self._make_test_model()
tic = time.time()
# Make trainer
trainer = Trainer(model=net)\
.build_optimizer('Adam')\
.build_criterion('CrossEntropyLoss')\
.build_metric('CategoricalError')\
.validate_every((1, 'epochs'))\
.save_every((1, 'epochs'), to_directory=join(self.ROOT_DIR, 'saves'))\
.save_at_best_validation_score()\
.set_max_num_epochs(2)
# Bind trainer to datasets
trainer.bind_loader('train',
trainloader).bind_loader('validate', testloader)
# Check device and fit
if self.CUDA:
if self.HALF_PRECISION:
trainer.cuda().set_precision('half').fit()
else:
trainer.cuda().fit()
else:
trainer.fit()
toc = time.time()
print("[*] Elapsed time: {} seconds.".format(toc - tic))
def test_multi_gpu(self):
if not torch.cuda.is_available():
return
from inferno.trainers.basic import Trainer
from inferno.io.box.cifar import get_cifar10_loaders
import os
# Make model
net = self._make_test_model()
# Make trainer
trainer = Trainer(model=net) \
.build_optimizer('Adam') \
.build_criterion('CrossEntropyLoss') \
.build_metric('CategoricalError') \
.validate_every((1, 'epochs')) \
.save_every((1, 'epochs'), to_directory=os.path.join(self.ROOT_DIR, 'saves')) \
.save_at_best_validation_score() \
.set_max_num_epochs(2)\
.cuda(devices=[0, 1, 2, 3], base_device='cpu')
train_loader, validate_loader = get_cifar10_loaders(
root_directory=self.ROOT_DIR, download=True)
trainer.bind_loader('train', train_loader)
trainer.bind_loader('validate', validate_loader)
trainer.fit()
def setUp(self):
# Build model
net = self._make_test_model()
# Build trainer
self.trainer = Trainer(net)\
.build_logger(TensorboardLogger(send_image_at_batch_indices=0,
send_image_at_channel_indices='all',
log_images_every=(20, 'iterations')),
log_directory=os.path.join(self.ROOT_DIR, 'logs'))\
.build_criterion('CrossEntropyLoss')\
.build_metric('CategoricalError')\
.build_optimizer('Adam')\
.validate_every((1, 'epochs'))\
.save_every((2, 'epochs'), to_directory=os.path.join(self.ROOT_DIR, 'saves'))\
.save_at_best_validation_score()\
.set_max_num_epochs(2)\
.cuda().set_precision(self.PRECISION)
# Load CIFAR10 data
train_loader, test_loader = \
get_cifar10_loaders(root_directory=os.path.join(self.ROOT_DIR, 'data'),
download=self.DOWNLOAD_CIFAR)
# Bind loaders
self.trainer.bind_loader('train', train_loader).bind_loader(
'validate', test_loader)
def test_serialization(self):
if not hasattr(self, 'trainer'):
self.setUp()
# Serialize
self.trainer.save()
# Unserialize
trainer = Trainer().load(os.path.join(self.ROOT_DIR, 'saves'))
train_loader, test_loader = \
get_cifar10_loaders(root_directory=os.path.join(self.ROOT_DIR, 'data'),
download=self.DOWNLOAD_CIFAR)
trainer.bind_loader('train',
train_loader).bind_loader('validate', test_loader)
trainer.fit()
trainer.print("Inspect logs at: {}".format(self.trainer.log_directory))
import torch.nn as nn
from inferno.extensions.layers import ConvELU2D
from inferno.extensions.layers import Flatten
model = nn.Sequential(
ConvELU2D(in_channels=3, out_channels=256, kernel_size=3),
nn.MaxPool2d(kernel_size=2, stride=2),
ConvELU2D(in_channels=256, out_channels=256, kernel_size=3),
nn.MaxPool2d(kernel_size=2, stride=2),
ConvELU2D(in_channels=256, out_channels=256, kernel_size=3),
nn.MaxPool2d(kernel_size=2, stride=2), Flatten(),
nn.Linear(in_features=(256 * 4 * 4), out_features=10), nn.Softmax())
##################################################
# data loaders
from inferno.io.box.cifar import get_cifar10_loaders
train_loader, validate_loader = get_cifar10_loaders(DATASET_DIRECTORY,
download=DOWNLOAD_CIFAR)
logger = TensorboardLogger(log_scalars_every=(1, 'iteration'),
log_images_every='never')
##################################################
# Build trainer
from inferno.trainers.basic import Trainer
trainer = Trainer(model)
trainer.build_criterion('CrossEntropyLoss')
trainer.build_metric('CategoricalError')
trainer.build_optimizer('Adam')
trainer.validate_every((2, 'epochs'))
trainer.save_every((5, 'epochs'))
trainer.save_to_directory(SAVE_DIRECTORY)