def test_Timer_callback():
runner = Runner(
model=TestModel,
optimizer=TestOptimizer,
criterion=TestCriterion,
metrics=TestMetric,
callbacks=pt_clb.Timer(),
)
runner.fit(TestLoader, epochs=2)
def test_rank_zero_only():
"""check that decorator disables come callbacks"""
os.environ["RANK"] = "0"
# check that wrapping instance work
timer = pt_clb.rank_zero_only(pt_clb.Timer())
assert hasattr(timer, "timer")
os.environ["RANK"] = "1"
# check that wrapping class also works
timer = pt_clb.rank_zero_only(pt_clb.Timer)()
assert not hasattr(timer, "timer")
criterion=TEST_CRITERION,
metrics=TEST_METRIC,
gradient_clip_val=1.0
)
runner.fit(TEST_LOADER, epochs=2)
# We only test that callbacks don't crash NOT that they do what they should do
TMP_PATH = "/tmp/pt_tools2/"
os.makedirs(TMP_PATH, exist_ok=True)
@pytest.mark.parametrize(
"callback",
[
pt_clb.Timer(),
pt_clb.ReduceLROnPlateau(),
pt_clb.CheckpointSaver(TMP_PATH, save_name="model.chpn"),
pt_clb.CheckpointSaver(
TMP_PATH, save_name="model.chpn", monitor=TEST_METRIC.name, mode="max"
),
pt_clb.TensorBoard(log_dir=TMP_PATH),
pt_clb.TensorBoardWithCM(log_dir=TMP_PATH),
pt_clb.ConsoleLogger(),
pt_clb.FileLogger(TMP_PATH),
pt_clb.Mixup(0.2, NUM_CLASSES),
pt_clb.Cutmix(1.0, NUM_CLASSES),
pt_clb.ScheduledDropout(),
],
)
def test_callback(callback):
def main():
FLAGS = parse_args()
print(FLAGS)
pt.utils.misc.set_random_seed(42) # fix all seeds
## dump config
os.makedirs(FLAGS.outdir, exist_ok=True)
yaml.dump(vars(FLAGS), open(FLAGS.outdir + '/config.yaml', 'w'))
## get dataloaders
if FLAGS.train_tta:
FLAGS.bs //= 4 # account for later augmentations to avoid OOM
train_dtld, val_dtld = get_dataloaders(FLAGS.datasets, FLAGS.augmentation,
FLAGS.bs, FLAGS.size,
FLAGS.val_size,
FLAGS.buildings_only)
## get model and optimizer
model = MODEL_FROM_NAME[FLAGS.segm_arch](FLAGS.arch,
**FLAGS.model_params).cuda()
if FLAGS.train_tta:
# idea from https://arxiv.org/pdf/2002.09024.pdf paper
model = pt.tta_wrapper.TTA(model,
segm=True,
h_flip=True,
rotation=[90],
merge="max")
model.encoder = model.model.encoder
model.decoder = model.model.decoder
optimizer = optimizer_from_name(FLAGS.optim)(
model.parameters(),
lr=FLAGS.lr,
weight_decay=FLAGS.
weight_decay, # **FLAGS.optim_params TODO: add additional optim params if needed
)
if FLAGS.lookahead:
optimizer = pt.optim.Lookahead(optimizer)
if FLAGS.resume:
checkpoint = torch.load(
FLAGS.resume, map_location=lambda storage, loc: storage.cuda())
model.load_state_dict(checkpoint["state_dict"], strict=False)
num_params = pt.utils.misc.count_parameters(model)[0]
print(f"Number of parameters: {num_params / 1e6:.02f}M")
## train on fp16 by default
model, optimizer = apex.amp.initialize(model,
optimizer,
opt_level="O1",
verbosity=0,
loss_scale=1024)
## get loss. fixed for now.
bce_loss = TargetWrapper(
pt.losses.CrossEntropyLoss(mode="binary").cuda(), "mask")
bce_loss.name = "BCE"
loss = criterion_from_list(FLAGS.criterion).cuda()
# loss = 0.5 * pt.losses.CrossEntropyLoss(mode="binary", weight=[5]).cuda()
print("Loss for this run is: ", loss)
## get runner
sheduler = pt.fit_wrapper.callbacks.PhasesScheduler(FLAGS.phases)
runner = pt.fit_wrapper.Runner(
model,
optimizer,
criterion=loss,
callbacks=[
pt_clb.Timer(),
pt_clb.ConsoleLogger(),
pt_clb.FileLogger(FLAGS.outdir),
pt_clb.SegmCutmix(1, 1) if FLAGS.cutmix else NoClb(),
pt_clb.CheckpointSaver(FLAGS.outdir, save_name="model.chpn"),
sheduler,
PredictViewer(FLAGS.outdir, num_images=8),
ScheduledDropout(FLAGS.dropout, FLAGS.dropout_epochs)
if FLAGS.dropout else NoClb()
],
metrics=[
bce_loss,
TargetWrapper(
pt.metrics.JaccardScore(mode="binary").cuda(), "mask"),
TargetWrapper(ThrJaccardScore(thr=0.5), "mask"),
TargetWrapper(BalancedAccuracy2(balanced=False), "mask"),
],
)
if FLAGS.decoder_warmup_epochs > 0:
## freeze encoder
for p in model.encoder.parameters():
p.requires_grad = False
runner.fit(
train_dtld,
val_loader=val_dtld,
epochs=FLAGS.decoder_warmup_epochs,
steps_per_epoch=50 if FLAGS.short_epoch else None,
val_steps=50 if FLAGS.short_epoch else None,
)
## unfreeze all
for p in model.parameters():
p.requires_grad = True
# need to init again to avoid nan's in loss
optimizer = optimizer_from_name(FLAGS.optim)(
model.parameters(),
lr=FLAGS.lr,
weight_decay=FLAGS.
weight_decay, # **FLAGS.optim_params TODO: add additional optim params if needed
)
model, optimizer = apex.amp.initialize(model,
optimizer,
opt_level="O1",
verbosity=0,
loss_scale=2048)
runner.state.model = model
runner.state.optimizer = optimizer
runner.fit(
train_dtld,
val_loader=val_dtld,
start_epoch=FLAGS.decoder_warmup_epochs,
epochs=sheduler.tot_epochs,
steps_per_epoch=50 if FLAGS.short_epoch else None,
val_steps=50 if FLAGS.short_epoch else None,
)
def main():
# Get config for this run
hparams = parse_args()
# Setup logger
config = {
"handlers": [
{
"sink": sys.stdout,
"format": "{time:[MM-DD HH:mm]} - {message}"
},
{
"sink": f"{hparams.outdir}/logs.txt",
"format": "{time:[MM-DD HH:mm]} - {message}"
},
],
}
logger.configure(**config)
logger.info(f"Parameters used for training: {hparams}")
# Fix seeds for reprodusability
pt.utils.misc.set_random_seed(hparams.seed)
# Save config
os.makedirs(hparams.outdir, exist_ok=True)
yaml.dump(vars(hparams), open(hparams.outdir + "/config.yaml", "w"))
# Get model
model = Model(arch=hparams.arch,
model_params=hparams.model_params,
embedding_size=hparams.embedding_size,
pooling=hparams.pooling).cuda()
# Get loss
# loss = LOSS_FROM_NAME[hparams.criterion](in_features=hparams.embedding_size, **hparams.criterion_params).cuda()
loss = LOSS_FROM_NAME["cross_entropy"].cuda()
logger.info(f"Loss for this run is: {loss}")
if hparams.resume:
checkpoint = torch.load(
hparams.resume, map_location=lambda storage, loc: storage.cuda())
model.load_state_dict(checkpoint["state_dict"], strict=True)
loss.load_state_dict(checkpoint["loss"], strict=True)
if hparams.freeze_bn:
freeze_batch_norm(model)
# Get optimizer
# optim_params = pt.utils.misc.filter_bn_from_wd(model)
optim_params = list(loss.parameters()) + list(
model.parameters()) # add loss params
optimizer = optimizer_from_name(hparams.optim)(
optim_params, lr=0, weight_decay=hparams.weight_decay, amsgrad=True)
num_params = pt.utils.misc.count_parameters(model)[0]
logger.info(f"Model size: {num_params / 1e6:.02f}M")
# logger.info(model)
# Scheduler is an advanced way of planning experiment
sheduler = pt.fit_wrapper.callbacks.PhasesScheduler(hparams.phases)
# Save logs
TB_callback = pt_clb.TensorBoard(hparams.outdir, log_every=20)
# Get dataloaders
train_loader, val_loader, val_indexes = get_dataloaders(
root=hparams.root,
augmentation=hparams.augmentation,
size=hparams.size,
val_size=hparams.val_size,
batch_size=hparams.batch_size,
workers=hparams.workers,
)
# Load validation query / gallery split and resort it according to indexes from sampler
df_val = pd.read_csv(os.path.join(hparams.root, "train_val.csv"))
df_val = df_val[df_val["is_train"].astype(np.bool) == False]
val_is_query = df_val.is_query.values[val_indexes].astype(np.bool)
logger.info(f"Start training")
# Init runner
runner = pt.fit_wrapper.Runner(
model,
optimizer,
criterion=loss,
callbacks=[
# pt_clb.BatchMetrics([pt.metrics.Accuracy(topk=1)]),
ContestMetricsCallback(
is_query=val_is_query[:1280] if hparams.debug else val_is_query
),
pt_clb.Timer(),
pt_clb.ConsoleLogger(),
pt_clb.FileLogger(),
TB_callback,
CheckpointSaver(hparams.outdir,
save_name="model.chpn",
monitor="target",
mode="max"),
CheckpointSaver(hparams.outdir,
save_name="model_mapr.chpn",
monitor="mAP@R",
mode="max"),
CheckpointSaver(hparams.outdir, save_name="model_loss.chpn"),
sheduler,
# EMA must go after other checkpoints
pt_clb.ModelEma(model, hparams.ema_decay)
if hparams.ema_decay else pt_clb.Callback(),
],
use_fp16=hparams.
use_fp16, # use mixed precision by default. # hparams.opt_level != "O0",
)
if hparams.head_warmup_epochs > 0:
#Freeze model
for p in model.parameters():
p.requires_grad = False
runner.fit(
train_loader,
# val_loader=val_loader,
epochs=hparams.head_warmup_epochs,
steps_per_epoch=20 if hparams.debug else None,
# val_steps=20 if hparams.debug else None,
)
# Unfreeze model
for p in model.parameters():
p.requires_grad = True
if hparams.freeze_bn:
freeze_batch_norm(model)
# Re-init to avoid nan's in loss
optim_params = list(loss.parameters()) + list(model.parameters())
optimizer = optimizer_from_name(hparams.optim)(
optim_params,
lr=0,
weight_decay=hparams.weight_decay,
amsgrad=True)
runner.state.model = model
runner.state.optimizer = optimizer
runner.state.criterion = loss
# Train
runner.fit(
train_loader,
# val_loader=val_loader,
start_epoch=hparams.head_warmup_epochs,
epochs=sheduler.tot_epochs,
steps_per_epoch=20 if hparams.debug else None,
# val_steps=20 if hparams.debug else None,
)
logger.info(f"Loading best model")
checkpoint = torch.load(os.path.join(hparams.outdir, f"model.chpn"))
model.load_state_dict(checkpoint["state_dict"], strict=True)
# runner.state.model = model
# loss.load_state_dict(checkpoint["loss"], strict=True)
# Evaluate
_, [acc1, map10, target, mapR] = runner.evaluate(
val_loader,
steps=20 if hparams.debug else None,
)
logger.info(
f"Val: Acc@1 {acc1:0.5f}, mAP@10 {map10:0.5f}, Target {target:0.5f}, mAP@R {mapR:0.5f}"
)
# Save params used for training and final metrics into separate TensorBoard file
metric_dict = {
"hparam/Acc@1": acc1,
"hparam/mAP@10": map10,
"hparam/mAP@R": target,
"hparam/Target": mapR,
}
# Convert all lists / dicts to avoid TB error
hparams.phases
hparams.phases = str(hparams.phases)
hparams.model_params = str(hparams.model_params)
hparams.criterion_params = str(hparams.criterion_params)
with pt.utils.tensorboard.CorrectedSummaryWriter(hparams.outdir) as writer:
writer.add_hparams(hparam_dict=vars(hparams), metric_dict=metric_dict)
def main():
# Get config for this run
hparams = parse_args()
# Setup logger
config = {
"handlers": [
{
"sink": sys.stdout,
"format": "{time:[MM-DD HH:mm]} - {message}"
},
{
"sink": f"{hparams.outdir}/logs.txt",
"format": "{time:[MM-DD HH:mm]} - {message}"
},
],
}
logger.configure(**config)
# Use print instead of logger to have alphabetic order.
logger.info(f"Parameters used for training: {vars(hparams)}")
# Fix all seeds for reprodusability
pt.utils.misc.set_random_seed(hparams.seed)
# Save config
os.makedirs(hparams.outdir, exist_ok=True)
yaml.dump(vars(hparams), open(hparams.outdir + "/config.yaml", "w"))
# Get models and optimizers
model = MODEL_FROM_NAME[hparams.model](**hparams.model_params).cuda()
logger.info(
f"Model size: {pt.utils.misc.count_parameters(model)[0] / 1e6:.02f}M")
optimizer = torch.optim.Adam(model.parameters(),
weight_decay=hparams.weight_decay,
amsgrad=True) # Get LR from phases later
# Get loss
loss = criterion_from_list(hparams.criterion).cuda()
# Init per-image metrics and add names
metrics = metrics_from_list(hparams.metrics, reduction='mean')
logger.info(f"Metrics: {[m.name for m in metrics]}")
# Init feature metrics and add names
feature_metrics = []
feature_extractor = "vgg16"
for name in hparams.feature_metrics:
metric = copy.copy(METRIC_FROM_NAME[name])
metric.name = f"{name}_{feature_extractor}"
feature_metrics.append(metric)
# Scheduler is an advanced way of planning experiment
sheduler = pt_clb.PhasesScheduler(hparams.phases)
save_name = "model_{monitor}.chpn"
# Init train loop
runner = pt.fit_wrapper.Runner(
model=model,
optimizer=optimizer,
criterion=loss,
callbacks=[
pt_clb.Timer(),
clb.FeatureLoaderMetrics(metrics=feature_metrics,
feature_extractor="vgg16"),
pt_clb.BatchMetrics(metrics=metrics),
clb.ConsoleLogger(metrics=["ssim", "psnr"]),
clb.TensorBoard(hparams.outdir, log_every=40, num_images=2),
# List of CheckpointSavers, one per metric
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='loss',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='psnr',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='ssim',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='ms-ssim',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='gmsd',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='ms-gmsd',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='ms-gmsdc',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='fsim',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='fsimc',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='vsi',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='mdsi',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='vifp',
mode='max',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='content_vgg16_ap',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='style_vgg16',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='lpips',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='dists',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='brisque',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='is_metric_vgg16',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='is_vgg16',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='kid_vgg16',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='fid_vgg16',
mode='min',
verbose=False),
clb.CheckpointSaver(hparams.outdir,
save_name=save_name,
monitor='msid_vgg16',
mode='min',
verbose=False),
sheduler,
],
)
# Get dataloaders
transform = get_aug(aug_type=hparams.aug_type,
task=hparams.task,
dataset=hparams.train_dataset,
size=hparams.size)
train_loader = get_dataloader(dataset=hparams.train_dataset,
train=True,
transform=transform,
batch_size=hparams.batch_size)
transform = get_aug(aug_type="val",
task=hparams.task,
dataset=hparams.val_dataset,
size=hparams.size)
val_loader = get_dataloader(dataset=hparams.val_dataset,
train=False,
transform=transform,
batch_size=hparams.batch_size)
# Train
runner.fit(
train_loader,
epochs=sheduler.tot_epochs,
val_loader=val_loader,
steps_per_epoch=2 if hparams.debug else None,
val_steps=2 if hparams.debug else None,
)
logger.info("Finished training!")
def main():
## get config for this run
FLAGS = parse_args()
os.makedirs(FLAGS.outdir, exist_ok=True)
config = {
"handlers": [
{
"sink": sys.stdout,
"format": "{time:[MM-DD HH:mm:ss]} - {message}"
},
{
"sink": f"{FLAGS.outdir}/logs.txt",
"format": "{time:[MM-DD HH:mm:ss]} - {message}"
},
],
}
if FLAGS.is_master:
logger.configure(**config)
## dump config and diff for reproducibility
yaml.dump(vars(FLAGS), open(FLAGS.outdir + "/config.yaml", "w"))
kwargs = {"universal_newlines": True, "stdout": subprocess.PIPE}
with open(FLAGS.outdir + "/commit_hash.txt", "w") as fp:
fp.write(
subprocess.run(["git", "rev-parse", "--short", "HEAD"],
**kwargs).stdout)
with open(FLAGS.outdir + "/diff.txt", "w") as fp:
fp.write(subprocess.run(["git", "diff"], **kwargs).stdout)
else:
logger.configure(handlers=[])
logger.info(FLAGS)
## makes it slightly faster
cudnn.benchmark = True
if FLAGS.deterministic:
pt.utils.misc.set_random_seed(42) # fix all seeds
## setup distributed
if FLAGS.distributed:
logger.info("Distributed initializing process group")
torch.cuda.set_device(FLAGS.local_rank)
dist.init_process_group(backend="nccl",
init_method="env://",
world_size=FLAGS.world_size)
## get dataloaders
train_loader = DaliLoader(True, FLAGS.batch_size, FLAGS.workers,
FLAGS.size)
val_loader = DaliLoader(False, FLAGS.batch_size, FLAGS.workers, FLAGS.size)
## get model
logger.info(f"=> Creating model '{FLAGS.arch}'")
model = det_models.__dict__[FLAGS.arch](**FLAGS.model_params)
if FLAGS.weight_standardization:
model = pt.modules.weight_standartization.conv_to_ws_conv(model)
model = model.cuda()
## get optimizer
# want to filter BN from weight decay by default. It never hurts
optim_params = pt.utils.misc.filter_bn_from_wd(model)
# start with 0 lr. Scheduler will change this later
optimizer = optimizer_from_name(FLAGS.optim)(
optim_params,
lr=0,
weight_decay=FLAGS.weight_decay,
**FLAGS.optim_params)
if FLAGS.lookahead:
optimizer = pt.optim.Lookahead(optimizer, la_alpha=0.5)
## load weights from previous run if given
if FLAGS.resume:
checkpoint = torch.load(
FLAGS.resume,
map_location=lambda s, loc: s.cuda()) # map for multi-gpu
model.load_state_dict(checkpoint["state_dict"]) # strict=False
FLAGS.start_epoch = checkpoint["epoch"]
try:
optimizer.load_state_dict(checkpoint["optimizer"])
except: # may raise an error if another optimzer was used or no optimizer in state dict
logger.info("Failed to load state dict into optimizer")
# Important to create EMA Callback after cuda() and AMP but before DDP wrapper
ema_clb = pt_clb.ModelEma(
model, FLAGS.ema_decay) if FLAGS.ema_decay else NoClbk()
if FLAGS.distributed:
model = DDP(model, delay_allreduce=True)
## define loss function (criterion)
anchors = pt.utils.box.generate_anchors_boxes(FLAGS.size)[0]
# script loss to lower memory consumption and make it faster
# as of 1.5 it does run but loss doesn't decrease for some reason
# FIXME: uncomment after 1.6
criterion = torch.jit.script(DetectionLoss(anchors).cuda())
# criterion = DetectionLoss(anchors).cuda()
## load COCO (needed for evaluation)
val_coco_api = COCO("data/annotations/instances_val2017.json")
model_saver = (pt_clb.CheckpointSaver(FLAGS.outdir, save_name="model.chpn")
if FLAGS.is_master else NoClbk())
sheduler = pt.fit_wrapper.callbacks.PhasesScheduler(FLAGS.phases)
# common callbacks
callbacks = [
pt_clb.StateReduce(), # MUST go first
sheduler,
pt_clb.Mixup(FLAGS.mixup, 1000) if FLAGS.mixup else NoClbk(),
pt_clb.Cutmix(FLAGS.cutmix, 1000) if FLAGS.cutmix else NoClbk(),
model_saver, # need to have CheckpointSaver before EMA so moving it here
ema_clb, # ModelEMA MUST go after checkpoint saver to work, otherwise it would save main model instead of EMA
CocoEvalClbTB(FLAGS.outdir, val_coco_api, anchors),
]
if FLAGS.is_master: # callback for master process
master_callbacks = [
pt_clb.Timer(),
pt_clb.ConsoleLogger(),
pt_clb.FileLogger(FLAGS.outdir, logger=logger),
]
callbacks.extend(master_callbacks)
runner = pt.fit_wrapper.Runner(
model,
optimizer,
criterion,
# metrics=[pt.metrics.Accuracy(), pt.metrics.Accuracy(5)],
callbacks=callbacks,
use_fp16=FLAGS.opt_level != "O0",
)
if FLAGS.evaluate:
return None, (42, 42)
return runner.evaluate(val_loader)
runner.fit(
train_loader,
steps_per_epoch=(None, 10)[FLAGS.short_epoch],
val_loader=val_loader,
# val_steps=(None, 20)[FLAGS.short_epoch],
epochs=sheduler.tot_epochs,
# start_epoch=FLAGS.start_epoch, # TODO: maybe want to continue from epoch
)
# TODO: maybe return best loss?
return runner.state.val_loss.avg, (
0, 0) # [m.avg for m in runner.state.val_metrics]
def main():
# Setup logger
config = {
"handlers": [
{"sink": sys.stdout, "format": "{time:[MM-DD HH:mm:ss]} - {message}"},
{"sink": f"{hparams.outdir}/logs.txt", "format": "{time:[MM-DD HH:mm:ss]} - {message}"},
],
}
logger.configure(**config)
# Get config for this run
hparams = parse_args()
logger.info(f"Parameters used for training: {hparams}")
# Fix seeds for reprodusability
pt.utils.misc.set_random_seed(hparams.seed)
## Save config and Git diff (don't know how to do it without subprocess)
os.makedirs(hparams.outdir, exist_ok=True)
yaml.dump(vars(hparams), open(hparams.outdir + '/config.yaml', 'w'))
kwargs = {"universal_newlines": True, "stdout": subprocess.PIPE}
with open(hparams.outdir + '/commit_hash.txt', 'w') as f:
f.write(subprocess.run(["git", "rev-parse", "--short", "HEAD"], **kwargs).stdout)
with open(hparams.outdir + '/diff.txt', 'w') as f:
f.write(subprocess.run(["git", "diff"], **kwargs).stdout)
## Get dataloaders
train_loader, val_loader = get_dataloaders(
root=hparams.root,
augmentation=hparams.augmentation,
fold=hparams.fold,
pos_weight=hparams.pos_weight,
batch_size=hparams.batch_size,
size=hparams.size,
val_size=hparams.val_size,
workers=hparams.workers
)
# Get model and optimizer
model = MODEL_FROM_NAME[hparams.segm_arch](hparams.backbone, **hparams.model_params).cuda()
optimizer = optimizer_from_name(hparams.optim)(
model.parameters(), # Get LR from phases later
weight_decay=hparams.weight_decay
)
# Convert all Conv2D -> WS_Conv2d if needed
if hparams.ws:
model = pt.modules.weight_standartization.conv_to_ws_conv(model).cuda()
# Load weights if needed
if hparams.resume:
checkpoint = torch.load(hparams.resume, map_location=lambda storage, loc: storage.cuda())
model.load_state_dict(checkpoint["state_dict"], strict=False)
num_params = pt.utils.misc.count_parameters(model)[0]
logger.info(f"Model size: {num_params / 1e6:.02f}M")
## Use AMP
model, optimizer = apex.amp.initialize(
model, optimizer, opt_level=hparams.opt_level, verbosity=0, loss_scale=1024
)
# Get loss
loss = criterion_from_list(hparams.criterion).cuda()
logger.info(f"Loss for this run is: {loss}")
bce_loss = pt.losses.CrossEntropyLoss(mode="binary").cuda() # Used as a metric
bce_loss.name = "BCE"
# Scheduler is an advanced way of planning experiment
sheduler = pt.fit_wrapper.callbacks.PhasesScheduler(hparams.phases)
# Init runner
runner = pt.fit_wrapper.Runner(
model,
optimizer,
criterion=loss,
callbacks=[
pt_clb.Timer(),
pt_clb.ConsoleLogger(),
pt_clb.FileLogger(hparams.outdir, logger=logger),
pt_clb.CheckpointSaver(hparams.outdir, save_name="model.chpn"),
sheduler,
PredictViewer(hparams.outdir, num_images=4)
],
metrics=[
bce_loss,
pt.metrics.JaccardScore(mode="binary").cuda(),
# ThrJaccardScore(thr=0.5),
],
)
if hparams.decoder_warmup_epochs > 0:
# Freeze encoder
for p in model.encoder.parameters():
p.requires_grad = False
runner.fit(
train_loader,
val_loader=val_loader,
epochs=hparams.decoder_warmup_epochs,
steps_per_epoch=10 if hparams.debug else None,
val_steps=10 if hparams.debug else None,
# val_steps=50 if hparams.debug else None,
)
# Unfreeze all
for p in model.parameters():
p.requires_grad = True
# Reinit again to avoid NaN's in loss
optimizer = optimizer_from_name(hparams.optim)(
model.parameters(),
weight_decay=hparams.weight_decay
)
model, optimizer = apex.amp.initialize(
model, optimizer, opt_level=hparams.opt_level, verbosity=0, loss_scale=2048
)
runner.state.model = model
runner.state.optimizer = optimizer
# Train both encoder and decoder
runner.fit(
train_loader,
val_loader=val_loader,
start_epoch=hparams.decoder_warmup_epochs,
epochs=sheduler.tot_epochs,
steps_per_epoch=10 if hparams.debug else None,
val_steps=10 if hparams.debug else None,
)