def train(args,
epoch,
start_iteration,
data_loader,
model,
optimizer,
logger,
is_validate=False,
offset=0):
statistics = []
total_loss = 0
if is_validate:
model.eval()
title = 'Validating Epoch {}'.format(epoch)
args.validation_n_batches = len(
data_loader
) - 1 if args.validation_n_batches < 0 else args.validation_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=100,
total=np.minimum(len(data_loader),
args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training Epoch {}'.format(epoch)
args.train_n_batches = len(
data_loader
) - 1 if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=120,
total=np.minimum(len(data_loader),
args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = progress._time()
for batch_idx, (data, target) in enumerate(progress):
data, target = [Variable(d, volatile=is_validate) for d in data], [
Variable(t, volatile=is_validate) for t in target
]
if args.cuda and args.number_gpus == 1:
data, target = [d.cuda(async=True) for d in data
], [t.cuda(async=True) for t in target]
optimizer.zero_grad() if not is_validate else None
losses = model(data[0], target[0])
losses = [torch.mean(loss_value) for loss_value in losses]
loss_val = losses[1] # Collect first loss for weight update
total_loss += loss_val.data[0]
loss_values = [v.data[0] for v in losses]
# gather loss_labels, direct return leads to recursion limit error as it looks for variables to gather'
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss)
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch,
global_iteration,
optimizer)
loss_labels.append('lr')
loss_values.append(optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = '{} Epoch {}'.format(
'Validating' if is_validate else 'Training', epoch)
if (type(loss_labels[0]) is list) or (type(loss_labels[0]) is
tuple):
progress.set_description(title + ' ' +
tools.format_dictionary_of_losses(
loss_labels[0], statistics[-1]))
else:
progress.set_description(title + ' ' +
tools.format_dictionary_of_losses(
loss_labels, statistics[-1]))
if ((((global_iteration + 1) % args.log_frequency) == 0
and not is_validate) or
(is_validate and batch_idx == args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (progress._time() - last_log_time),
global_iteration)
last_log_time = progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(loss_labels[0] if (
type(loss_labels[0]) is list) or (
type(loss_labels[0]) is tuple) else loss_labels):
logger.add_scalar('average batch ' + str(key),
all_losses[:,
i].mean(), global_iteration)
#logger.add_histogram(str(key), all_losses[:, i], global_iteration)
if is_validate:
_, output = model(data[0], target[0], inference=True)
render_flow = output[0].data.cpu().numpy().transpose(
1, 2, 0)
ground_truth = target[0][0].data.cpu().numpy().transpose(
1, 2, 0)
render_img = tools.flow_to_image(render_flow).transpose(
2, 0, 1)
true_img = tools.flow_to_image(ground_truth).transpose(
2, 0, 1)
render_img = torch.Tensor(render_img) / 255.0
true_img = torch.Tensor(true_img) / 255.0
input_img = data[0][0, :, 0, :, :].data.cpu() / 255.0
logger.add_image('renderimg',
torchvision.utils.make_grid(render_img),
global_iteration)
logger.add_image('ground_truth',
torchvision.utils.make_grid(true_img),
global_iteration)
logger.add_image('input_img',
torchvision.utils.make_grid(input_img),
global_iteration)
# Reset Summary
statistics = []
if (is_validate and (batch_idx == args.validation_n_batches)):
break
if ((not is_validate) and (batch_idx == (args.train_n_batches))):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(args,
epoch,
start_iteration,
data_loader,
model,
optimizer,
loss,
logger,
is_validate=False,
offset=0):
statistics = []
total_loss = 0
gpu_mem = tools.gpumemusage()
if is_validate:
model.eval()
title = 'Validating {} Epoch {}'.format(gpu_mem, epoch)
args.validation_n_batches = np.inf if args.validation_n_batches < 0 else args.validation_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=100,
total=np.minimum(len(data_loader),
args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training {} Epoch {}'.format(tools.gpumemusage(), epoch)
args.train_n_batches = np.inf if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=120,
total=np.minimum(len(data_loader),
args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = progress._time()
for batch_idx, (data, target) in enumerate(progress):
data, target = [Variable(d, volatile=is_validate) for d in data], [
Variable(t, volatile=is_validate) for t in target
]
if args.cuda:
data, target = [d.cuda(async=True) for d in data
], [t.cuda(async=True) for t in target]
optimizer.zero_grad() if not is_validate else None
output = model(data[0])
loss_labels, loss_values = loss(output, target[0])
loss_val = loss_values[0]
total_loss += loss_val.data[0]
loss_values = [v.data[0] for v in loss_values]
assert not np.isnan(total_loss)
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch,
global_iteration,
optimizer)
loss_labels.append('lr')
loss_values.append(optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = '{} {} Epoch {}'.format(
'Validating' if is_validate else 'Training',
tools.gpumemusage(), epoch)
progress.set_description(
title + ' ' +
tools.format_dictionary_of_losses(loss_labels, statistics[-1]))
if ((((global_iteration + 1) % args.log_frequency) == 0
and not is_validate) or
(is_validate and batch_idx == args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (progress._time() - last_log_time),
global_iteration)
last_log_time = progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(loss_labels):
logger.add_scalar('average batch ' + key,
all_losses[:,
i].mean(), global_iteration)
logger.add_histogram(key, all_losses[:, i],
global_iteration)
# Reset Summary
statistics = []
if (is_validate and (batch_idx == args.validation_n_batches)):
break
if ((not is_validate) and (batch_idx == (args.train_n_batches))):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(input_args,
train_epoch,
start_iteration,
files_loader,
model,
model_optimizer,
logger,
is_validate=False,
offset=0):
statistics = []
total_loss = 0
if is_validate:
model.eval()
title = 'Validating Epoch {}'.format(train_epoch)
input_args.validation_n_batches = np.inf if input_args.validation_n_batches < 0 else input_args.validation_n_batches
file_progress = tqdm(tools.IteratorTimer(files_loader),
ncols=100,
total=np.minimum(
len(files_loader),
input_args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training Epoch {}'.format(train_epoch)
input_args.train_n_batches = np.inf if input_args.train_n_batches < 0 else input_args.train_n_batches
file_progress = tqdm(tools.IteratorTimer(files_loader),
ncols=120,
total=np.minimum(len(files_loader),
input_args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = file_progress._time()
for batch_idx, (data_file) in enumerate(file_progress):
video_dataset = datasets_video.VideoFileDataJIT(
input_args, data_file[0])
video_loader = DataLoader(video_dataset,
batch_size=args.effective_batch_size,
shuffle=True,
**gpuargs)
global_iteration = start_iteration + batch_idx
# note~ for debugging purposes
# video_frame_progress = tqdm(tools.IteratorTimer(video_loader), ncols=120,
# total=len(video_loader), smoothing=0.9, miniters=1,
# leave=True, desc=data_file[0])
for i_batch, (data, target) in enumerate(video_loader):
data, target = [Variable(d)
for d in data], [Variable(t) for t in target]
if input_args.cuda and input_args.number_gpus == 1:
data, target = [d.cuda(async=True) for d in data
], [t.cuda(async=True) for t in target]
model_optimizer.zero_grad() if not is_validate else None
losses = model(data[0], target[0])
losses = [torch.mean(loss_value) for loss_value in losses]
loss_val = losses[0] # Collect first loss for weight update
total_loss += loss_val.data
loss_values = [v.data for v in losses]
# gather loss_labels, direct return leads to recursion limit error as it looks for variables to gather'
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss.cpu().numpy())
if not is_validate and input_args.fp16:
loss_val.backward()
if input_args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
input_args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / input_args.loss_scale)
model_optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if input_args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
input_args.gradient_clip)
model_optimizer.step()
# Update hyperparameters if needed
if not is_validate:
tools.update_hyperparameter_schedule(
input_args, train_epoch, global_iteration,
model_optimizer)
loss_labels.append('lr')
loss_values.append(model_optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(file_progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = '{} Epoch {}'.format(
'Validating' if is_validate else 'Training', train_epoch)
file_progress.set_description(
title + ' ' + tools.format_dictionary_of_losses(
tools.flatten_list(loss_labels), statistics[-1]))
if ((((global_iteration + 1) % input_args.log_frequency) == 0
and not is_validate)
or (is_validate
and batch_idx == input_args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (file_progress._time() - last_log_time),
global_iteration)
last_log_time = file_progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(tools.flatten_list(loss_labels)):
if isinstance(all_losses[:, i].item(), torch.Tensor):
average_batch = all_losses[:, i].item().mean()
else:
average_batch = all_losses[:, i].item()
logger.add_scalar('average batch ' + str(key),
average_batch, global_iteration)
logger.add_histogram(str(key), all_losses[:, i],
global_iteration)
# Reset Summary
statistics = []
if is_validate and (batch_idx == input_args.validation_n_batches):
break
if (not is_validate) and (batch_idx
== (input_args.train_n_batches)):
break
file_progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(args, epoch, start_iteration, data_loader, model, optimizer, logger, is_validate=False, offset=0):
statistics = []
total_loss = 0
if is_validate:
model.eval()
title = "Validating Epoch {}".format(epoch)
args.validation_n_batches = np.inf if args.validation_n_batches < 0 else args.validation_n_batches
progress = tqdm(
tools.IteratorTimer(data_loader),
ncols=100,
total=np.minimum(len(data_loader), args.validation_n_batches),
leave=True,
position=offset,
desc=title,
)
else:
model.train()
title = "Training Epoch {}".format(epoch)
args.train_n_batches = np.inf if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(
tools.IteratorTimer(data_loader),
ncols=120,
total=np.minimum(len(data_loader), args.train_n_batches),
smoothing=0.9,
miniters=1,
leave=True,
position=offset,
desc=title,
)
last_log_time = progress._time()
for batch_idx, (data, target) in enumerate(progress):
data, target = [Variable(d) for d in data], [Variable(t) for t in target]
if args.cuda and args.number_gpus == 1:
data, target = [d.cuda(non_blocking=True) for d in data], [t.cuda(non_blocking=True) for t in target]
optimizer.zero_grad() if not is_validate else None
losses = model(data[0], target[0])
losses = [torch.mean(loss_value) for loss_value in losses]
loss_val = losses[0] # Collect first loss for weight update
total_loss += loss_val.item()
loss_values = [v.item() for v in losses]
# gather loss_labels, direct return leads to recursion limit error as it looks for variables to gather'
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss)
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(), args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(params[i]).detach()
param_copy[i].grad.mul_(1.0 / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(), args.gradient_clip)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch, global_iteration, optimizer)
loss_labels.append("lr")
loss_values.append(optimizer.param_groups[0]["lr"])
loss_labels.append("load")
loss_values.append(progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = "{} Epoch {}".format("Validating" if is_validate else "Training", epoch)
progress.set_description(title + " " + tools.format_dictionary_of_losses(loss_labels, statistics[-1]))
if (((global_iteration + 1) % args.log_frequency) == 0 and not is_validate) or (
is_validate and batch_idx == args.validation_n_batches - 1
):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
"batch logs per second", len(statistics) / (progress._time() - last_log_time), global_iteration
)
last_log_time = progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(loss_labels):
logger.add_scalar("average batch " + str(key), all_losses[:, i].mean(), global_iteration)
logger.add_histogram(str(key), all_losses[:, i], global_iteration)
# Reset Summary
statistics = []
if is_validate and (batch_idx == args.validation_n_batches):
break
if (not is_validate) and (batch_idx == (args.train_n_batches)):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(args,
epoch,
start_iteration,
data_loader,
model,
optimizer,
logger,
is_validate=False,
offset=0):
statistics = []
all_gradient_norms = []
total_loss = 0
if is_validate:
model.eval()
title = 'Validating Epoch {}'.format(epoch)
args.validation_n_batches = np.inf if args.validation_n_batches < 0 else args.validation_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=200,
total=np.minimum(len(data_loader),
args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training Epoch {}'.format(epoch)
args.train_n_batches = np.inf if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=200,
total=np.minimum(len(data_loader),
args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = progress._time()
for batch_idx, (data, target) in enumerate(progress):
data, target = [Variable(d)
for d in data], [Variable(t) for t in target]
if args.cuda and args.number_gpus == 1:
data, target = [d.cuda(non_blocking=True) for d in data
], [t.cuda(non_blocking=True) for t in target]
optimizer.zero_grad() if not is_validate else None
losses, flow = model(data[0], target[0])
#print('Losses shape {} {}'.format(losses[0].shape, losses[1].shape))
losses = [torch.mean(loss_value) for loss_value in losses]
loss_val = losses[0] # Collect first loss for weight update
total_loss += loss_val.item()
loss_values = [v.item() for v in losses]
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss)
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
gradient_norm = torch.nn.utils.clip_grad_norm(
model.parameters(), args.gradient_clip)
all_gradient_norms.append(gradient_norm)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch,
global_iteration,
optimizer)
loss_labels.append('lr')
loss_values.append(optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = '{} Epoch {}'.format(
'Validating' if is_validate else 'Training', epoch)
progress.set_description(
title + ' ' +
tools.format_dictionary_of_losses(loss_labels, statistics[-1]))
if ((((global_iteration + 1) % args.log_frequency) == 0
and not is_validate) or
(is_validate and batch_idx == args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (progress._time() - last_log_time),
global_iteration)
last_log_time = progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(loss_labels):
logger.add_scalar('average batch ' + str(key),
all_losses[:,
i].mean(), global_iteration)
logger.add_histogram(str(key), all_losses[:, i],
global_iteration)
if args.gradient_clip:
logger.add_scalar('average batch gradient_norm',
np.array(all_gradient_norms).mean(),
global_iteration)
all_gradient_norms = []
# Returns multiscale flow, get largest scale and first element in batch
if args.multiframe or args.multiframe_two_output:
flow = flow_utils.flow_postprocess(flow)[0][0]
num_flows = len(args.frame_weights)
flows_scaled = [
cv2.resize(flow[:, :, i:i + 2], None, fx=4.0, fy=4.0)
for i in range(0, 2 * num_flows, 2)
]
target = target[0].detach().cpu().numpy()
target_flow = np.transpose(target[0], (1, 2, 3, 0))
results_images = [
visualize_results(flows_scaled[i], target_flow[i],
data[0][0] if i == 0 else None)
for i in range(0, num_flows)
]
for i in range(0, num_flows):
logger.add_image('flow{} and target'.format(i),
ToTensor()(results_images[i]),
global_iteration)
else:
flow = flow_utils.flow_postprocess(flow)[0][0]
flow_scaled = cv2.resize(flow, None, fx=4.0, fy=4.0)
target_flow = flow_utils.flow_postprocess(target)[0][0]
results_image = visualize_results(flow_scaled, target_flow,
data[0][0])
logger.add_image('flow and target',
ToTensor()(results_image),
global_iteration)
# logger.add_histogram('flow_values', flow[0], global_iteration)
# Reset Summary
statistics = []
if (is_validate and (batch_idx == args.validation_n_batches)):
break
if ((not is_validate) and (batch_idx == (args.train_n_batches))):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(args,
epoch,
start_iteration,
data_loader,
model,
optimizer,
logger,
is_validate=False,
offset=0):
statistics = []
total_loss = 0
if is_validate:
model.eval()
title = 'Validating Epoch {}'.format(epoch)
#print("validation_n_batches", args.validation_n_batches)
args.validation_n_batches = np.inf if args.validation_n_batches < 0 else args.validation_n_batches
#print("validation_n_batches", args.validation_n_batches)
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=100,
total=np.minimum(len(data_loader),
args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training Epoch {}'.format(epoch)
args.train_n_batches = np.inf if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=120,
total=np.minimum(len(data_loader),
args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = progress._time()
for batch_idx, (data, target) in enumerate(progress):
data, target = [Variable(d)
for d in data], [Variable(t) for t in target]
if args.cuda and args.number_gpus == 1:
data, target = [d.cuda(async=True) for d in data
], [t.cuda(async=True) for t in target]
optimizer.zero_grad() if not is_validate else None
#print("this is data type",data[0].type())
#print("\n")
#print("this is target type",target[0].type())
#print("\n")
losses = model(data[0], target[0])
losses = [torch.mean(loss_value)
for loss_value in losses] # taking mean of batches
loss_val = losses[
0] # Collect first loss for weight update #take first loss, second is EPE
total_loss += loss_val.data.cpu()
loss_values = [v.data.cpu() for v in losses] #collect loss values
# gather loss_labels, direct return leads to recursion limit error as it looks for variables to gather'
#loss_labels = [y for x in model.module.loss.loss_labels for y in x] #list(model.module.loss.loss_labels)
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss.cpu())
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch,
global_iteration,
optimizer)
loss_labels.append('lr')
loss_values.append(optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(progress.iterable.last_duration) #add load
#if is_validate:
# print("this is EPE length", len(loss_values[:,1]))
# Print out statistics
#if is_validate:
# print(statistics)
statistics.append(loss_values)
#if is_validate:
# print(statistics)
title = '{} Epoch {}'.format(
'Validating' if is_validate else 'Training', epoch)
progress.set_description(
title + ' ' +
tools.format_dictionary_of_losses(loss_labels, statistics[-1]))
#if is_validate:
# print(batch_idx)
# args.log_frequency == 1 by default
if ((((global_iteration + 1) % args.log_frequency) == 0
and not is_validate) or is_validate
and batch_idx == min(args.validation_n_batches,
len(data_loader) - 1)):
#if ((((global_iteration + 1) % args.log_frequency) == 0 and not is_validate) or (is_validate and batch_idx == args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (progress._time() - last_log_time),
global_iteration)
last_log_time = progress._time()
all_losses = np.array(statistics)
#if is_validate:
# print(all_losses)
for i, key in enumerate(loss_labels):
logger.add_scalar('average batch ' + str(key),
all_losses[:,
i].mean(), global_iteration)
logger.add_histogram(str(key), all_losses[:, i],
global_iteration)
# Reset Summary
statistics = []
if (is_validate and (batch_idx == args.validation_n_batches)):
break
if ((not is_validate) and (batch_idx == (args.train_n_batches))):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
def train(args,
epoch,
start_iteration,
data_loader,
model,
optimizer,
logger,
is_validate=False,
offset=0):
#print(str(model))
statistics = []
total_loss = 0
debug = False
if is_validate:
model.eval()
title = 'Validating Epoch {}'.format(epoch)
args.validation_n_batches = np.inf if args.validation_n_batches < 0 else args.validation_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=100,
total=np.minimum(len(data_loader),
args.validation_n_batches),
leave=True,
position=offset,
desc=title)
else:
model.train()
title = 'Training Epoch {}'.format(epoch)
args.train_n_batches = np.inf if args.train_n_batches < 0 else args.train_n_batches
progress = tqdm(tools.IteratorTimer(data_loader),
ncols=120,
total=np.minimum(len(data_loader),
args.train_n_batches),
smoothing=.9,
miniters=1,
leave=True,
position=offset,
desc=title)
last_log_time = progress._time()
for batch_idx, (data, target, cdm) in enumerate(progress):
data, target, cdm = [
Variable(d, volatile=is_validate) for d in data
], [Variable(t, volatile=is_validate) for t in target
], [Variable(q, volatile=is_validate) for q in cdm]
if args.cuda and args.number_gpus == 1:
data, target, cdm = [d.cuda(async=True) for d in data
], [t.cuda(async=True) for t in target
], [q.cuda(async=True) for q in cdm]
if debug:
print(
'****************************************************************'
)
print('data_0')
print(data[0])
print('target_0')
print(target[0])
print('cdm')
print(type(cdm))
temp1 = cdm[0].data.cpu().numpy()
print(np.max(temp1))
print(temp1.shape)
print(
'****************************************************************'
)
optimizer.zero_grad() if not is_validate else None
losses = model(data[0], target[0])
losses = [torch.mean(loss_value) for loss_value in losses]
loss_val = losses[0] # Collect first loss for weight update
#A[batch_idx] = loss_val.data[0]
#np.savetxt('test_loss.out', np.array(A) , delimiter=',' , newline='\r\n' )
total_loss += loss_val.data[0]
loss_values = [v.data[0] for v in losses]
# gather loss_labels, direct return leads to recursion limit error as it looks for variables to gather'
loss_labels = list(model.module.loss.loss_labels)
assert not np.isnan(total_loss)
if not is_validate and args.fp16:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
params = list(model.parameters())
for i in range(len(params)):
param_copy[i].grad = params[i].grad.clone().type_as(
params[i]).detach()
param_copy[i].grad.mul_(1. / args.loss_scale)
optimizer.step()
for i in range(len(params)):
params[i].data.copy_(param_copy[i].data)
elif not is_validate:
loss_val.backward()
if args.gradient_clip:
torch.nn.utils.clip_grad_norm(model.parameters(),
args.gradient_clip)
optimizer.step()
# Update hyperparameters if needed
global_iteration = start_iteration + batch_idx
if not is_validate:
tools.update_hyperparameter_schedule(args, epoch,
global_iteration,
optimizer)
loss_labels.append('lr')
loss_values.append(optimizer.param_groups[0]['lr'])
loss_labels.append('load')
loss_values.append(progress.iterable.last_duration)
# Print out statistics
statistics.append(loss_values)
title = '{} Epoch {}'.format(
'Validating' if is_validate else 'Training', epoch)
progress.set_description(
title + ' ' +
tools.format_dictionary_of_losses(loss_labels, statistics[-1]))
if ((((global_iteration + 1) % args.log_frequency) == 0
and not is_validate) or
(is_validate and batch_idx == args.validation_n_batches - 1)):
global_iteration = global_iteration if not is_validate else start_iteration
logger.add_scalar(
'batch logs per second',
len(statistics) / (progress._time() - last_log_time),
global_iteration)
last_log_time = progress._time()
all_losses = np.array(statistics)
for i, key in enumerate(loss_labels):
logger.add_scalar('average batch ' + str(key),
all_losses[:,
i].mean(), global_iteration)
logger.add_histogram(str(key), all_losses[:, i],
global_iteration)
# Reset Summary
statistics = []
if (is_validate and (batch_idx == args.validation_n_batches)):
break
if ((not is_validate) and (batch_idx == (args.train_n_batches))):
break
progress.close()
return total_loss / float(batch_idx + 1), (batch_idx + 1)
