def main(unused_argv=None):
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
if tf.gfile.Exists(FLAGS.eval_dir):
tf.gfile.DeleteRecursively(FLAGS.eval_dir)
tf.gfile.MakeDirs(FLAGS.eval_dir)
evaluate(dataset)
def main(unused_args):
assert FLAGS.job_name in ['ps', 'worker'], 'job_name must be ps or worker'
# Extract all the hostnames for the ps and worker jobs to construct the
# cluster spec.
ps_hosts = FLAGS.ps_hosts.split(',')
worker_hosts = FLAGS.worker_hosts.split(',')
tf.logging.info('PS hosts are: %s' % ps_hosts)
tf.logging.info('Worker hosts are: %s' % worker_hosts)
cluster_spec = tf.train.ClusterSpec({'ps': ps_hosts,
'worker': worker_hosts})
server = tf.train.Server(
{'ps': ps_hosts,
'worker': worker_hosts},
job_name=FLAGS.job_name,
task_index=FLAGS.task_id,
protocol=FLAGS.protocol)
if FLAGS.job_name == 'ps':
# `ps` jobs wait for incoming connections from the workers.
server.join()
else:
# `worker` jobs will actually do the work.
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
# Only the chief checks for or creates train_dir.
if FLAGS.task_id == 0:
if not tf.gfile.Exists(FLAGS.train_dir):
tf.gfile.MakeDirs(FLAGS.train_dir)
train(server.target, dataset, cluster_spec)
def inputs(subset):
"""Construct distorted input for CIFAR training using the Reader ops.
Returns:
images: Images. 4D tensor of [batch_size, IMAGE_SIZE, IMAGE_SIZE, 3] size.
labels: Labels. 1D tensor of [batch_size] size.
Raises:
ValueError: If no data_dir
"""
if FLAGS.dataset is None:
raise ValueError('Please supply a dataset')
if FLAGS.dataset == 'imagenet' or FLAGS.dataset == 'imagenet_scale':
dataset = ImagenetData(FLAGS.dataset, subset=subset)
elif FLAGS.dataset == 'cifar10':
dataset = Cifar10Data(FLAGS.dataset, subset=subset)
elif FLAGS.dataset == 'cifar100':
dataset = Cifar100Data(FLAGS.dataset, subset=subset)
if subset == 'train':
images, labels = image_reader.create_data_batch(
dataset, FLAGS.train_batch_size)
elif subset == 'validation':
images, labels = image_reader.create_data_batch(
dataset, FLAGS.test_batch_size)
tf.add_to_collection('images', images)
return images, labels
def main(_):
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
if tf.gfile.Exists(FLAGS.train_dir):
tf.gfile.DeleteRecursively(FLAGS.train_dir)
tf.gfile.MakeDirs(FLAGS.train_dir)
inception_train.train(dataset)
def distorted_inputs():
"""Construct distorted input for CIFAR training using the Reader ops.
Returns:
images: Images. 4D tensor of [batch_size, IMAGE_SIZE, IMAGE_SIZE, 3] size.
labels: Labels. 1D tensor of [batch_size] size.
Raises:
ValueError: If no data_dir
"""
if not FLAGS.data_dir:
raise ValueError('Please supply a data_dir')
# data_dir = os.path.join(FLAGS.data_dir, 'cifar-10-batches-bin')
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
if tf.gfile.Exists(FLAGS.train_dir):
tf.gfile.DeleteRecursively(FLAGS.train_dir)
tf.gfile.MakeDirs(FLAGS.train_dir)
# return cifar10_input.distorted_inputs(data_dir=data_dir,
# batch_size=FLAGS.batch_size)
return cifar10_imagenet.distorted_inputs(
dataset,
batch_size=FLAGS.batch_size,
num_preprocess_threads=FLAGS.num_preprocess_threads)
def __init__(self, split, batch_size):
self.dataset = ImagenetData(split)
if split == 'train':
self.batch = imagenet.distorted_inputs(self.dataset, batch_size=batch_size)
elif split == 'validation':
self.batch = imagenet.inputs(self.dataset, batch_size=batch_size)
else:
raise Exception('Unknown split {}'.format(split))
def get_validation_num():
if FLAGS.dataset == 'imagenet' or FLAGS.dataset == 'imagenet_scale':
return ImagenetData('imagenet',
subset='validation').num_examples_per_epoch()
elif FLAGS.dataset == 'cifar10':
return Cifar10Data('cifar10',
subset='validation').num_examples_per_epoch()
elif FLAGS.dataset == 'cifar100':
return Cifar100Data('cifar100',
subset='validation').num_examples_per_epoch()
def main(argv=None):
dataset = ImagenetData(subset=FLAGS.subset)
if FLAGS.job_name:
assert FLAGS.job_name in ['ps', 'worker'], 'job_name must be ps or worker'
# if tf.gfile.Exists(arg_parsing.MODEL_DIR):
# tf.gfile.DeleteRecursively(arg_parsing.MODEL_DIR)
# else:
# tf.gfile.MakeDirs(FLAGS.model_dir)
printInfo()
print("dataset",dataset)
train.train_dis_(dataset)
else:
assert dataset.data_files()
# if (FLAGS.mode == 'testing'):
# test.test(FLAGS.mode)
# else:
printInfo()
print("dataset",dataset)
train.train(dataset)
def main(_):
util.check_tensorflow_version()
dataset = ImagenetData(subset=FLAGS.subset)
processor = ProcessorImagenet()
processor.label_offset = FLAGS.label_offset
feed = FeedImagesWithLabels(dataset=dataset, processor=processor)
model_params = {
'num_classes': feed.num_classes_for_network(),
'network': FLAGS.network,
}
if FLAGS.my:
# My variants of Resnet, Inception, and VGG networks
model = ModelMySlim(params=model_params)
else:
# Google's tf.slim models
model = ModelGoogleSlim(params=model_params)
model.check_norm(processor.normalize)
exec_eval.evaluate(feed=feed, model=model)
def main(argv=None):
ps_hosts = FLAGS.ps_hosts.split(',')
worker_hosts = FLAGS.worker_hosts.split(',')
tf.logging.info('PS hosts are: %s' % ps_hosts)
tf.logging.info('Worker hosts are: %s' % worker_hosts)
cluster_spec = tf.train.ClusterSpec({
'ps': ps_hosts,
'worker': worker_hosts
})
server = tf.train.Server({
'ps': ps_hosts,
'worker': worker_hosts
},
job_name=FLAGS.job_name,
task_index=FLAGS.task_id,
protocol=FLAGS.protocol)
sspManager = SspManager(len(worker_hosts), 5)
if FLAGS.job_name == 'ps':
if FLAGS.task_id == 0:
rpcServer = sspManager.create_rpc_server(ps_hosts[0].split(':')[0])
rpcServer.serve()
server.join()
time.sleep(5)
rpcClient = sspManager.create_rpc_client(ps_hosts[0].split(':')[0])
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
is_chief = (FLAGS.task_id == 0)
if is_chief:
if not tf.gfile.Exists(FLAGS.train_dir):
tf.gfile.MakeDirs(FLAGS.train_dir)
num_workers = len(cluster_spec.as_dict()['worker'])
num_parameter_servers = len(cluster_spec.as_dict()['ps'])
with tf.device('/job:worker/task:%d' % FLAGS.task_id):
with slim.scopes.arg_scope(
[slim.variables.variable, slim.variables.global_step],
device=slim.variables.VariableDeviceChooser(
num_parameter_servers)):
'''Prepare Input'''
global_step = slim.variables.global_step()
batch_size = tf.placeholder(dtype=tf.int32,
shape=(),
name='batch_size')
images, labels = image_processing.distorted_inputs(
dataset,
batch_size,
num_preprocess_threads=FLAGS.num_preprocess_threads)
num_classes = dataset.num_classes() + 1
'''Inference'''
logits = inception.inference(images,
num_classes,
for_training=True)
'''Loss'''
inception.loss(logits, labels, batch_size)
losses = tf.get_collection(slim.losses.LOSSES_COLLECTION)
losses += tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES)
total_loss = tf.add_n(losses, name='total_loss')
if is_chief:
loss_averages = tf.train.ExponentialMovingAverage(0.9,
name='avg')
loss_averages_op = loss_averages.apply(losses + [total_loss])
with tf.control_dependencies([loss_averages_op]):
total_loss = tf.identity(total_loss)
'''Optimizer'''
exp_moving_averager = tf.train.ExponentialMovingAverage(
inception.MOVING_AVERAGE_DECAY, global_step)
variables_to_average = (tf.trainable_variables() +
tf.moving_average_variables())
num_batches_per_epoch = (dataset.num_examples_per_epoch() /
FLAGS.batch_size)
decay_steps = int(num_batches_per_epoch *
FLAGS.num_epochs_per_decay / num_workers)
lr = tf.train.exponential_decay(FLAGS.initial_learning_rate,
global_step,
decay_steps,
FLAGS.learning_rate_decay_factor,
staircase=True)
opt = tf.train.RMSPropOptimizer(lr,
RMSPROP_DECAY,
momentum=RMSPROP_MOMENTUM,
epsilon=RMSPROP_EPSILON)
'''Train Operation'''
batchnorm_updates = tf.get_collection(
slim.ops.UPDATE_OPS_COLLECTION)
assert batchnorm_updates, 'Batchnorm updates are missing'
batchnorm_updates_op = tf.group(*batchnorm_updates)
with tf.control_dependencies([batchnorm_updates_op]):
total_loss = tf.identity(total_loss)
naive_grads = opt.compute_gradients(total_loss)
grads = [(tf.scalar_mul(
tf.cast(batch_size / FLAGS.batch_size, tf.float32), grad), var)
for grad, var in naive_grads]
apply_gradients_op = opt.apply_gradients(grads,
global_step=global_step)
with tf.control_dependencies([apply_gradients_op]):
train_op = tf.identity(total_loss, name='train_op')
'''Supervisor and Session'''
saver = tf.train.Saver()
init_op = tf.global_variables_initializer()
sv = tf.train.Supervisor(is_chief=is_chief,
logdir=FLAGS.train_dir,
init_op=init_op,
summary_op=None,
global_step=global_step,
recovery_wait_secs=1,
saver=saver,
save_model_secs=FLAGS.save_interval_secs)
tf.logging.info('%s Supervisor' % datetime.now())
sess_config = tf.ConfigProto(
allow_soft_placement=True,
log_device_placement=FLAGS.log_device_placement)
sess = sv.prepare_or_wait_for_session(server.target,
config=sess_config)
queue_runners = tf.get_collection(tf.GraphKeys.QUEUE_RUNNERS)
'''Start Training'''
sv.start_queue_runners(sess, queue_runners)
tf.logging.info('Started %d queues for processing input data.',
len(queue_runners))
batch_size_num = FLAGS.batch_size
for step in range(FLAGS.max_steps):
start_time = time.time()
run_options = tf.RunOptions(
trace_level=tf.RunOptions.FULL_TRACE)
run_metadata = tf.RunMetadata()
loss_value, gs = sess.run(
[train_op, global_step],
feed_dict={batch_size: batch_size_num},
options=run_options,
run_metadata=run_metadata)
assert not np.isnan(
loss_value), 'Model diverged with loss = NaN'
duration = time.time() - start_time
examples_per_sec = batch_size_num / float(duration)
sec_per_batch = float(duration)
format_str = (
"time: " + str(time.time()) +
'; %s: step %d (gs %d), loss= %.2f (%.1f samples/s; %.3f s/batch)'
)
tf.logging.info(format_str %
(datetime.now(), step, gs, loss_value,
examples_per_sec, sec_per_batch))
rpcClient.check_staleness(FLAGS.task_id, step)
def train():
"""Train Inception on a dataset for a number of steps."""
ps_hosts = FLAGS.ps_hosts.split(',')
worker_hosts = FLAGS.worker_hosts.split(',')
tf.logging.info('PS hosts are: %s' % ps_hosts)
tf.logging.info('Worker hosts are: %s' % worker_hosts)
cluster_spec = tf.train.ClusterSpec({
'ps': ps_hosts,
'worker': worker_hosts
})
server = tf.train.Server({
'ps': ps_hosts,
'worker': worker_hosts
},
job_name=FLAGS.job_name,
task_index=FLAGS.task_id,
protocol=FLAGS.protocol)
batchSizeManager = BatchSizeManager(FLAGS.batch_size, len(worker_hosts))
if FLAGS.job_name == 'ps':
if FLAGS.task_id == 0:
rpcServer = batchSizeManager.create_rpc_server(
ps_hosts[0].split(':')[0])
rpcServer.serve()
server.join()
dataset = ImagenetData(subset=FLAGS.subset)
rpcClient = batchSizeManager.create_rpc_client(ps_hosts[0].split(':')[0])
assert dataset.data_files()
# Only the chief checks for or creates train_dir.
if FLAGS.task_id == 0:
if not tf.gfile.Exists(FLAGS.train_dir):
tf.gfile.MakeDirs(FLAGS.train_dir)
num_workers = len(cluster_spec.as_dict()['worker'])
num_parameter_servers = len(cluster_spec.as_dict()['ps'])
if FLAGS.num_replicas_to_aggregate == -1:
num_replicas_to_aggregate = num_workers
else:
num_replicas_to_aggregate = FLAGS.num_replicas_to_aggregate
# Both should be greater than 0 in a distributed training.
assert num_workers > 0 and num_parameter_servers > 0, (
' num_workers and '
'num_parameter_servers'
' must be > 0.')
# Choose worker 0 as the chief. Note that any worker could be the chief
# but there should be only one chief.
is_chief = (FLAGS.task_id == 0)
#batchSizeManager = BatchSizeManager(32, 4)
# Ops are assigned to worker by default.
tf.logging.info('cccc-num_parameter_servers:' + str(num_parameter_servers))
partitioner = tf.fixed_size_partitioner(num_parameter_servers, 0)
device_setter = tf.train.replica_device_setter(
ps_tasks=num_parameter_servers)
slim = tf.contrib.slim
with tf.device('/job:worker/task:%d' % FLAGS.task_id):
with tf.variable_scope('root', partitioner=partitioner):
# Variables and its related init/assign ops are assigned to ps.
# with slim.arg_scope(
# [slim.variables.variable, slim.variables.global_step],
# device=slim.variables.VariableDeviceChooser(num_parameter_servers)):
with tf.device(device_setter):
# partitioner=partitioner):
# Create a variable to count the number of train() calls. This equals the
# number of updates applied to the variables.
# global_step = slim.variables.global_step()
global_step = tf.Variable(0, trainable=False)
# Calculate the learning rate schedule.
batch_size = tf.placeholder(dtype=tf.int32,
shape=(),
name='batch_size')
num_batches_per_epoch = (dataset.num_examples_per_epoch() /
FLAGS.batch_size)
# Decay steps need to be divided by the number of replicas to aggregate.
decay_steps = int(num_batches_per_epoch *
FLAGS.num_epochs_per_decay /
num_replicas_to_aggregate)
# Decay the learning rate exponentially based on the number of steps.
lr = tf.train.exponential_decay(
FLAGS.initial_learning_rate,
global_step,
decay_steps,
FLAGS.learning_rate_decay_factor,
staircase=True)
# Add a summary to track the learning rate.
# tf.summary.scalar('learning_rate', lr)
# Create an optimizer that performs gradient descent.
images, labels = image_processing.distorted_inputs(
dataset,
batch_size,
num_preprocess_threads=FLAGS.num_preprocess_threads)
print(images.get_shape())
print(labels.get_shape())
# Number of classes in the Dataset label set plus 1.
# Label 0 is reserved for an (unused) background class.
# num_classes = dataset.num_classes() + 1
num_classes = dataset.num_classes()
print(num_classes)
# logits = inception.inference(images, num_classes, for_training=True)
network_fn = nets_factory.get_network_fn(
'inception_v3', num_classes=num_classes)
(logits, _) = network_fn(images)
print(logits.get_shape())
# Add classification loss.
# inception.loss(logits, labels, batch_size)
# Gather all of the losses including regularization losses.
labels = tf.one_hot(labels, 1000, 1, 0)
cross_entropy = tf.losses.softmax_cross_entropy(
logits=logits, onehot_labels=labels)
# losses = tf.get_collection(slim.losses.LOSSES_COLLECTION)
# losses += tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES)
losses = tf.get_collection(tf.GraphKeys.REGULARIZATION_LOSSES)
total_loss = cross_entropy + _WEIGHT_DECAY * tf.add_n(
[tf.nn.l2_loss(v) for v in tf.trainable_variables()])
# total_loss = tf.add_n(losses, name='total_loss')
loss_averages = tf.train.ExponentialMovingAverage(0.9,
name='avg')
loss_averages_op = loss_averages.apply(losses + [total_loss])
with tf.control_dependencies([loss_averages_op]):
opt = tf.train.RMSPropOptimizer(lr,
RMSPROP_DECAY,
momentum=RMSPROP_MOMENTUM,
epsilon=RMSPROP_EPSILON)
grads0 = opt.compute_gradients(total_loss)
grads = [(tf.scalar_mul(
tf.cast(batch_size / FLAGS.batch_size, tf.float32),
grad), var) for grad, var in grads0]
total_loss = tf.identity(total_loss)
exp_moving_averager = tf.train.ExponentialMovingAverage(
MOVING_AVERAGE_DECAY, global_step)
variables_averages_op = exp_moving_averager.apply(
tf.trainable_variables())
apply_gradients_op = opt.apply_gradients(
grads, global_step=global_step)
with tf.control_dependencies(
[apply_gradients_op, variables_averages_op]):
train_op = tf.identity(total_loss, name='train_op')
# Get chief queue_runners and init_tokens, which is used to synchronize
# replicas. More details can be found in SyncReplicasOptimizer.
# chief_queue_runners = [opt.get_chief_queue_runner()]
# init_tokens_op = opt.get_init_tokens_op()
# Create a saver.
saver = tf.train.Saver()
# Build the summary operation based on the TF collection of Summaries.
# summary_op = tf.summary.merge_all()
# Build an initialization operation to run below.
init_op = tf.global_variables_initializer()
# We run the summaries in the same thread as the training operations by
# passing in None for summary_op to avoid a summary_thread being started.
# Running summaries and training operations in parallel could run out of
# GPU memory.
sv = tf.train.Supervisor(
is_chief=is_chief,
logdir=FLAGS.train_dir,
init_op=init_op,
summary_op=None,
global_step=global_step,
recovery_wait_secs=1,
saver=None,
save_model_secs=FLAGS.save_interval_secs)
tf.logging.info('%s Supervisor' % datetime.now())
sess_config = tf.ConfigProto(
allow_soft_placement=True,
log_device_placement=FLAGS.log_device_placement)
# Get a session.
sess = sv.prepare_or_wait_for_session(server.target,
config=sess_config)
# Start the queue runners.
queue_runners = tf.get_collection(tf.GraphKeys.QUEUE_RUNNERS)
sv.start_queue_runners(sess, queue_runners)
tf.logging.info('Started %d queues for processing input data.',
len(queue_runners))
# if is_chief:
# sv.start_queue_runners(sess, chief_queue_runners)
# sess.run(init_tokens_op)
# Train, checking for Nans. Concurrently run the summary operation at a
# specified interval. Note that the summary_op and train_op never run
# simultaneously in order to prevent running out of GPU memory.
# next_summary_time = time.time() + FLAGS.save_summaries_secs
step = 0
time0 = time.time()
batch_size_num = 1
while not sv.should_stop():
try:
start_time = time.time()
batch_size_num = 32
# batch_size_num = int((int(step)/3*10)) % 100000 + 1
# if step < 5:
# batch_size_num = 32
# batch_size_num = (batch_size_num ) % 64 + 1
# else:
# batch_size_num = 80
run_options = tf.RunOptions(
trace_level=tf.RunOptions.FULL_TRACE)
run_metadata = tf.RunMetadata()
my_images, loss_value, step = sess.run(
[images, train_op, global_step],
feed_dict={batch_size: batch_size_num},
options=run_options,
run_metadata=run_metadata)
b = time.time()
# assert not np.isnan(loss_value), 'Model diverged with loss = NaN'
if step > FLAGS.max_steps:
break
duration = time.time() - start_time
# thread = threading2.Thread(target=get_computation_time, name="get_computation_time",args=(run_metadata.step_stats,step,))
# thread.start()
# tl = timeline.Timeline(run_metadata.step_stats)
# last_batch_time = tl.get_local_step_duration('sync_token_q_Dequeue')
c0 = time.time()
# batch_size_num = batchSizeManager.dictate_new_batch_size(FLAGS.task_id, last_batch_time)
# batch_size_num = rpcClient.update_batch_size(FLAGS.task_id, last_batch_time, available_cpu, available_memory, step, batch_size_num)
# batch_size_num = rpcClient.update_batch_size(FLAGS.task_id, 0,0,0, step, batch_size_num)
# ctf = tl.generate_chrome_trace_format()
# with open("timeline.json", 'a') as f:
# f.write(ctf)
if step % 1 == 0:
examples_per_sec = FLAGS.batch_size / float(
duration)
c = time.time()
tf.logging.info("time statistics" +
" - train_time: " +
str(b - start_time) +
" - get_batch_time: " +
str(c0 - b) + " - get_bs_time: " +
str(c - c0) + " - accum_time: " +
str(c - time0) +
" - batch_size: " +
str(batch_size_num))
format_str = (
'Worker %d: %s: step %d, loss = %.2f'
'(%.1f examples/sec; %.3f sec/batch)')
tf.logging.info(
format_str %
(FLAGS.task_id, datetime.now(), step,
loss_value, examples_per_sec, duration))
# Determine if the summary_op should be run on the chief worker.
# if is_chief and next_summary_time < time.time():
# tf.logging.info('Running Summary operation on the chief.')
# summary_str = sess.run(summary_op)
# sv.summary_computed(sess, summary_str)
# tf.logging.info('Finished running Summary operation.')
# Determine the next time for running the summary.
# next_summary_time += FLAGS.save_summaries_secs
except:
if is_chief:
tf.logging.info(
'Chief got exception while running!')
raise
# Stop the supervisor. This also waits for service threads to finish.
sv.stop()
def train():
with tf.Graph().as_default(), tf.device('/cpu:0'):
# Create a variable to count the number of train() calls. This equals the
# number of batches processed * FLAGS.num_gpus.
global_step = tf.get_variable('global_step', [],
initializer=tf.constant_initializer(0),
trainable=False)
# Learning rate
lr = .001
# Create an optimizer that performs gradient descent.
opt = tf.train.AdamOptimizer(lr)
split_batch_size = int(helper.BATCH_SIZE / helper.N_GPUS)
num_preprocess_threads = helper.NUM_THREADS * helper.N_GPUS
# Get images and labels for CIFAR-10.
dataset = ImagenetData(subset='train')
assert dataset.data_files()
assert helper.BATCH_SIZE % helper.N_GPUS == 0, (
'Batch size must be divisible by number of GPUs')
split_batch_size = int(helper.BATCH_SIZE / helper.N_GPUS)
# Override the number of preprocessing threads to account for the increased
# number of GPU towers.
num_preprocess_threads = helper.NUM_THREADS * helper.N_GPUS
images, labels = image_processing.distorted_inputs(
dataset,
batch_size=helper.BATCH_SIZE,
num_preprocess_threads=num_preprocess_threads)
# Split the batch of images and labels for towers.
images_splits = tf.split(axis=0,
num_or_size_splits=helper.N_GPUS,
value=images)
labels_splits = tf.split(axis=0,
num_or_size_splits=helper.N_GPUS,
value=labels)
# Calculate the gradients for each model tower.
tower_grads = []
with tf.variable_scope(tf.get_variable_scope()):
for i in range(helper.N_GPUS):
with tf.device('/gpu:%d' % i):
with tf.name_scope('%s_%d' %
(helper.TOWER_NAME, i)) as scope:
# Calculate the loss for one tower of the CIFAR model. This function
# constructs the entire CIFAR model but shares the variables across
# all towers.
loss = tower_loss(scope, images_splits[i],
labels_splits[i])
tf.get_variable_scope().reuse_variables()
grads = opt.compute_gradients(loss)
tower_grads.append(grads)
# We must calculate the mean of each gradient. Note that this is the
# synchronization point across all towers.
grads = average_gradients(tower_grads)
# Apply the gradients to adjust the shared variables.
apply_gradient_op = opt.apply_gradients(grads, global_step=global_step)
# Track the moving averages of all trainable variables.
variable_averages = tf.train.ExponentialMovingAverage(
helper.MOVING_AVERAGE_DECAY, global_step)
variables_averages_op = variable_averages.apply(
tf.trainable_variables())
# Group all updates to into a single train op.
train_op = tf.group(apply_gradient_op, variables_averages_op)
# Build an initialization operation to run below.
init = tf.global_variables_initializer()
# Start running operations on the Graph. allow_soft_placement must be set to
# True to build towers on GPU, as some of the ops do not have GPU
# implementations.
sess = tf.Session(config=tf.ConfigProto(allow_soft_placement=True,
log_device_placement=False))
sess.run(init)
tf.train.start_queue_runners(sess=sess)
print("training")
#for epoch in range(helper.MAX_EPOCH):
for epoch in range(helper.MAX_STEPS):
start_time = time.time()
_, loss_value = sess.run([train_op, loss])
duration = time.time() - start_time
num_examples_per_step = helper.BATCH_SIZE * helper.N_GPUS
examples_per_sec = num_examples_per_step / duration
sec_per_batch = duration / helper.N_GPUS
format_str = (
'%s: step %d, loss = %.2f (%.1f examples/sec; %.3f sec/batch)')
print(format_str % (datetime.now(), i, loss_value,
examples_per_sec, sec_per_batch))
images = tf.cast(images, tf.float32)
images = tf.reshape(images, shape=[batch_size, height, width, depth])
# Display the training images in the visualizer.
tf.summary.image('images', images)
return images, tf.reshape(label_index_batch, [batch_size])
if __name__ == '__main__':
# dataset = FlowersData(subset="validation")
# images, labels = distorted_inputs(dataset)
dataset = ImagenetData(subset="val")
images, labels = distorted_inputs(dataset)
print(images,labels)
init = tf.global_variables_initializer()
with tf.Session() as sess:
sess.run(init)
coord=tf.train.Coordinator()
threads= tf.train.start_queue_runners(coord=coord)
for i in range(5):
image_np,label_np=sess.run([images, labels])
plt.imshow(image_np[0,:,:,:])
plt.title('label name:'+str(label_np[0]))
plt.show()
def train():
with tf.Graph().as_default(), tf.device('/cpu:0'):
# Get images and labels for CIFAR-10.
#dataset = CIFARData(subset='train')
dataset = ImagenetData(subset='train')
assert dataset.data_files()
#test_set = CIFARData(subset='validation')
test_set = ImagenetData(subset='validation')
assert test_set.data_files()
epoch1 = .5 * helper.MAX_EPOCHS
epoch2 = .75 * helper.MAX_EPOCHS
step1 = dataset.num_examples_per_epoch() * epoch1 // (
helper.BATCH_SIZE)
step2 = dataset.num_examples_per_epoch() * epoch2 // (
helper.BATCH_SIZE)
print('Reducing learning rate at step ' + str(step1) + ' and step ' +
str(step2) + ' and ending at ' + str(helper.MAX_STEPS))
# Create a variable to count the number of train() calls. This equals the
# number of batches processed * FLAGS.num_gpus.
global_step = tf.get_variable('global_step', [],
initializer=tf.constant_initializer(0),
trainable=False)
# Learning rate
lr = .1
#learning_rate = tf.placeholder(tf.float32, shape=[], name='learning_rate')
dropout = tf.placeholder(tf.float32, shape=[], name='dropout')
is_training = tf.placeholder(tf.bool, shape=[], name='is_training')
boundaries = [step1, step2]
values = [lr, lr / 10, lr / 100]
learning_rate = tf.train.piecewise_constant(global_step,
boundaries,
values,
name=None)
decayed_lr = tf.train.polynomial_decay(lr,
global_step,
helper.MAX_STEPS,
end_learning_rate=0.0001,
power=4.0,
cycle=False,
name=None)
# Create an optimizer that performs gradient descent.
with tf.name_scope('Optimizer'):
opt = tf.train.MomentumOptimizer(learning_rate=decayed_lr,
momentum=0.9,
use_nesterov=True)
#opt = tf.train.MomentumOptimizer(learning_rate=learning_rate, momentum=0.9, use_nesterov=True)
tf.summary.scalar('decayed_learning_rate', decayed_lr)
tf.summary.scalar('learning_rate', learning_rate)
# Override the number of preprocessing threads to account for the increased
# number of GPU towers.
num_preprocess_threads = helper.NUM_THREADS * helper.N_GPUS
distorted_images, distorted_labels = image_processing.distorted_inputs(
dataset,
batch_size=helper.SPLIT_BATCH_SIZE,
num_preprocess_threads=num_preprocess_threads)
#images, labels = image_processing.inputs(dataset, batch_size=helper.BATCH_SIZE, num_preprocess_threads=num_preprocess_threads)
test_images, test_labels = image_processing.inputs(
test_set,
batch_size=helper.SPLIT_BATCH_SIZE,
num_preprocess_threads=num_preprocess_threads)
input_summaries = copy.copy(tf.get_collection(tf.GraphKeys.SUMMARIES))
# Split the batch of images and labels for towers.
#images_splits = tf.split(axis=0, num_or_size_splits=helper.N_GPUS, value=distorted_images)
#labels_splits = tf.split(axis=0, num_or_size_splits=helper.N_GPUS, value=distorted_labels)
batch_queue = tf.contrib.slim.prefetch_queue.prefetch_queue(
[distorted_images, distorted_labels], capacity=2 * helper.N_GPUS)
# Calculate the gradients for each model tower.
tower_grads = []
with tf.variable_scope(tf.get_variable_scope()):
for i in range(helper.N_GPUS):
with tf.device('/gpu:%d' % i):
with tf.name_scope('%s_%d' %
(helper.TOWER_NAME, i)) as scope:
# Calculate the loss for one tower of the CIFAR model. This function
# constructs the entire CIFAR model but shares the variables across
# all towers.
image_batch, label_batch = batch_queue.dequeue()
loss = tower_loss(scope,
image_batch,
label_batch,
dropout=dropout,
is_training=is_training)
#loss = tower_loss(scope, images_splits[i], labels_splits[i], dropout=dropout, is_training=is_training)
# Retain the summaries from the final tower.
summaries = tf.get_collection(tf.GraphKeys.SUMMARIES,
scope)
tf.get_variable_scope().reuse_variables()
grads = opt.compute_gradients(loss)
tower_grads.append(grads)
# We must calculate the mean of each gradient. Note that this is the
# synchronization point across all towers.
grads = average_gradients(tower_grads)
# Add a summaries for the input processing and global_step.
summaries.extend(input_summaries)
# Apply the gradients to adjust the shared variables.
update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS)
with tf.control_dependencies(update_ops):
apply_gradient_op = opt.apply_gradients(grads,
global_step=global_step)
# Track the moving averages of all trainable variables.
variable_averages = tf.train.ExponentialMovingAverage(
helper.MOVING_AVERAGE_DECAY, global_step)
variables_averages_op = variable_averages.apply(
tf.trainable_variables())
# Group all updates to into a single train op.
#train_op = apply_gradient_op
train_op = tf.group(apply_gradient_op, variables_averages_op)
# Add histograms for trainable variables.
#for var in tf.trainable_variables():
# summaries.append(tf.summary.histogram(var.op.name, var))
for grad, var in grads:
summaries.append(tf.summary.histogram(var.op.name, var))
#summaries.append(tf.summary.histogram(var.op.name + '_gradient', grad))
# Create a saver.
saver = tf.train.Saver(tf.global_variables())
cross_entropy_op = tf.reduce_mean(tf.get_collection('cross_entropies'),
name='cross_entropy')
accuracy_op = tf.reduce_mean(tf.get_collection('accuracy'),
name='accuracies')
summaries.append(tf.summary.scalar('cross_entropy', cross_entropy_op))
summaries.append(tf.summary.scalar('accuracy', accuracy_op))
# Build the summary operation from the last tower summaries.
summary_op = tf.summary.merge(summaries)
# Build an initialization operation to run below.
init = tf.global_variables_initializer()
# Start running operations on the Graph. allow_soft_placement must be set to
# True to build towers on GPU, as some of the ops do not have GPU
# implementations.
sess = tf.Session(config=tf.ConfigProto(allow_soft_placement=True,
log_device_placement=False))
#run_options = tf.RunOptions(trace_level=tf.RunOptions.FULL_TRACE)
#run_metadata = tf.RunMetadata()
sess.run(init)
tf.train.start_queue_runners(sess=sess)
if RESTORE == True:
ckpt = tf.train.get_checkpoint_state(SAVE_POINT)
saver.restore(sess, ckpt.model_checkpoint_path)
# Assuming model_checkpoint_path looks something like:
# /my-favorite-path/imagenet_train/model.ckpt-0,
# extract global_step from it.
restored_step = ckpt.model_checkpoint_path.split('/')[-1].split(
'-')[-1]
print('Successfully loaded model from %s at step=%s.' %
(ckpt.model_checkpoint_path, restored_step))
step = int(restored_step)
range_step = range(step, helper.MAX_STEPS)
tf.get_variable_scope().reuse_variables()
global_step = tf.get_variable('global_step', trainable=False)
else:
range_step = range(helper.MAX_STEPS)
summary_writer = tf.summary.FileWriter('summary', graph=sess.graph)
num_params = helper.count_params() / 1e6
print('Total number of params = %.2fM' % num_params)
print("training")
top1_error = [-1.0, -1.0]
top1_step = 0
top5_error = [-1.0, -1.0]
top5_step = 0
for step in range_step:
start_time = time.time()
_, loss_value, cross_entropy_value, accuracy_value = sess.run(
[train_op, loss, cross_entropy_op, accuracy_op],
feed_dict={
dropout: 0.8,
is_training: True
}
) #, options=run_options, run_metadata=run_metadata)#, learning_rate: lr})
duration = time.time() - start_time
if step == step1 or step == step2:
print('Decreasing Learning Rate')
lr /= 10
if step % 10 == 0:
num_examples_per_step = helper.BATCH_SIZE
examples_per_sec = num_examples_per_step / duration
sec_per_batch = duration
format_str = (
'step %d, loss = %.2f, cross entropy = %.2f, accuracy = %.2f, %.3f sec/batch'
)
print(format_str % (step, loss_value, cross_entropy_value,
accuracy_value, sec_per_batch))
"""
# Create the Timeline object, and write it to a json
tl = timeline.Timeline(run_metadata.step_stats)
ctf = tl.generate_chrome_trace_format()
with open('timeline.json', 'w') as f:
f.write(ctf)
"""
if step % 100 == 0:
summary_str = sess.run(summary_op,
feed_dict={
dropout: 0.8,
is_training: False
}) #, learning_rate: lr})
summary_writer.add_summary(summary_str, step)
# Save the model checkpoint periodically.
if step % 5000 == 0 or (step + 1) == helper.MAX_STEPS:
if step != 0:
checkpoint_path = SAVE_POINT + 'model.ckpt'
saver.save(sess, checkpoint_path, global_step=step)
print('Model saved')
#evaluate(distorted_images, distorted_labels, sess, dropout=dropout, is_training=is_training, train=True)
top1, top5 = evaluate(test_images,
test_labels,
sess,
dropout=dropout,
is_training=is_training,
train=False)
if top1 > top1_error[0]:
top1_error[0] = top1
top1_error[1] = top5
top1_step = step
if top5 > top5_error[1]:
top5_error[0] = top1
top5_error[1] = top5
top5_step = step
print(
"Best top1 model achieved top1: %.4f, top5: %.4f at step %d"
% (top1_error[0], top1_error[1], top1_step))
print(
"Best top5 model achieved top1: %.4f, top5: %.4f at step %d"
% (top5_error[0], top5_error[1], top5_step))
# Calculate predictions.
top_1_op = tf.nn.in_top_k(model.logits, labels, 1)
top_5_op = tf.nn.in_top_k(model.logits, labels, 5)
# Restore the moving average version of the learned variables for eval.
variable_averages = tf.train.ExponentialMovingAverage(
FLAGS.MOVING_AVERAGE_DECAY)
variables_to_restore = variable_averages.variables_to_restore()
saver = tf.train.Saver(variables_to_restore)
#saver = tf.train.Saver(tf.global_variables())
# Build the summary operation based on the TF collection of Summaries.
summary_op = tf.summary.merge_all()
graph_def = tf.get_default_graph().as_graph_def()
summary_writer = tf.summary.FileWriter(FLAGS.eval_dir,
graph_def=graph_def)
while True:
_eval_once(saver, summary_writer, top_1_op, top_5_op, summary_op,
model, labels)
if FLAGS.run_once:
break
time.sleep(FLAGS.eval_interval_secs)
if __name__ == '__main__':
dataset = ImagenetData(subset='validation')
assert dataset.data_files()
evaluate(dataset)
def main(_):
with tf.Graph().as_default(), tf.device('/cpu:0'):
dataset = ImagenetData(subset=FLAGS.subset)
assert dataset.data_files()
global_step = tf.get_variable('global_step', [],
initializer=tf.constant_initializer(0),
trainable=False)
# Calculate the learning rate schedule.
num_batches_per_epoch = (dataset.num_examples_per_epoch() /
FLAGS.batch_size)
decay_steps = int(num_batches_per_epoch * FLAGS.num_epochs_per_decay)
# Decay the learning rate exponentially based on the number of steps.
learning_rate = tf.train.exponential_decay(
FLAGS.learning_rate,
global_step,
decay_steps,
FLAGS.learning_rate_decay_factor,
staircase=True)
tf.summary.scalar('lr', learning_rate)
is_training = tf.placeholder(tf.bool)
#opt = tf.train.AdamOptimizer(learning_rate)
opt = tf.train.RMSPropOptimizer(learning_rate,
RMSPROP_DECAY,
momentum=RMSPROP_MOMENTUM,
epsilon=RMSPROP_EPSILON)
with tf.name_scope("create_inputs"):
#if tf.gfile.Exists(FLAGS.SNAPSHOT_DIR):
# tf.gfile.DeleteRecursively(FLAGS.SNAPSHOT_DIR)
#tf.gfile.MakeDirs(FLAGS.SNAPSHOT_DIR)
# Get images and labels for ImageNet and split the batch across GPUs.
assert FLAGS.batch_size % FLAGS.gpu_nums == 0, (
'Batch size must be divisible by number of GPUs')
split_batch_size = int(FLAGS.batch_size / FLAGS.gpu_nums)
# Override the number of preprocessing threads to account for the increased
# number of GPU towers.
num_preprocess_threads = FLAGS.num_preprocess_threads * FLAGS.gpu_nums
images, labels = image_processing.distorted_inputs(
dataset, num_preprocess_threads=num_preprocess_threads)
#tf.summary.image('images', images, max_outputs = 10)
images_splits = tf.split(axis=0,
num_or_size_splits=FLAGS.gpu_nums,
value=images)
labels_splits = tf.split(axis=0,
num_or_size_splits=FLAGS.gpu_nums,
value=tf.one_hot(indices=labels,
depth=FLAGS.num_classes))
multi_grads = []
with tf.variable_scope(tf.get_variable_scope()):
for i in xrange(FLAGS.gpu_nums):
with tf.device('/gpu:%d' % i):
with tf.name_scope('%s_%d' % ('ImageNet', i)) as scope:
graph = Model_Graph(num_class=FLAGS.num_classes,
is_training=is_training)
model = graph._build_defaut_graph(
images=images_splits[i])
# Top-1 accuracy
top1acc = tf.reduce_mean(
tf.cast(
tf.nn.in_top_k(
model.logits,
tf.argmax(labels_splits[i], axis=1), 1),
tf.float32))
# Top-n accuracy
topnacc = tf.reduce_mean(
tf.cast(
tf.nn.in_top_k(
model.logits,
tf.argmax(labels_splits[i], axis=1),
FLAGS.top_k), tf.float32))
tf.summary.scalar('top1acc_{}'.format(i), top1acc)
tf.summary.scalar('topkacc_{}'.format(i), topnacc)
all_trainable = [v for v in tf.trainable_variables()]
loss = tf.nn.softmax_cross_entropy_with_logits(
logits=model.logits, labels=labels_splits[i])
l2_losses = [
FLAGS.weight_decay * tf.nn.l2_loss(v)
for v in tf.trainable_variables()
if 'weights' in v.name
]
reduced_loss = tf.reduce_mean(loss) + tf.add_n(
l2_losses)
tf.summary.scalar('loss_{}'.format(i), reduced_loss)
tf.get_variable_scope().reuse_variables()
#batchnorm_update_ops = tf.get_collection(tf.GraphKeys.UPDATE_OPS, scope)
batchnorm_updates = tf.get_collection(
tf.GraphKeys.UPDATE_OPS)
grads = opt.compute_gradients(reduced_loss,
all_trainable)
multi_grads.append(grads)
grads = average_gradients(multi_grads)
# Track the moving averages of all trainable variables.
# Note that we maintain a "double-average" of the BatchNormalization
# global statistics. This is more complicated then need be but we employ
# this for backward-compatibility with our previous models.
variable_averages = tf.train.ExponentialMovingAverage(
FLAGS.MOVING_AVERAGE_DECAY, global_step)
variables_to_average = (tf.trainable_variables() +
tf.moving_average_variables())
variables_averages_op = variable_averages.apply(variables_to_average)
# Group all updates to into a single train op.
batchnorm_updates_op = tf.group(*batchnorm_updates)
train_op = tf.group(opt.apply_gradients(grads, global_step),
variables_averages_op, batchnorm_updates_op)
#grads_value = list(zip(grads, all_trainable))
#for grad, var in grads_value:
# tf.summary.histogram(var.name + '/gradient', grad)
summary_op = tf.summary.merge_all()
# Set up tf session and initialize variables.
config = tf.ConfigProto()
config.allow_soft_placement = True
sess = tf.Session(config=config)
init = tf.global_variables_initializer()
sess.run(init)
# Saver for storing checkpoints of the model.
saver = tf.train.Saver(var_list=tf.global_variables(), max_to_keep=2)
restore_var = [v for v in tf.trainable_variables()] + [
v for v in tf.global_variables() if 'moving_mean' in v.name
or 'moving_variance' in v.name or 'global_step' in v.name
]
ckpt = tf.train.get_checkpoint_state(FLAGS.SNAPSHOT_DIR)
if ckpt and ckpt.model_checkpoint_path:
loader = tf.train.Saver(var_list=restore_var)
load(loader, sess, ckpt.model_checkpoint_path)
else:
print('No checkpoint file found.')
load_step = 0
summary_writer = tf.summary.FileWriter(FLAGS.SNAPSHOT_DIR,
graph=sess.graph)
# Iterate over training steps.
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(coord=coord, sess=sess)
for step in range(FLAGS.num_steps):
start_time = time.time()
feed_dict = {is_training: True}
if step % 50000 == 0 and step != 0:
loss_value, _ = sess.run([reduced_loss, train_op],
feed_dict=feed_dict)
save(saver, sess, FLAGS.SNAPSHOT_DIR, step)
elif step % 100 == 0:
summary_str, loss_value, _ = sess.run(
[summary_op, reduced_loss, train_op], feed_dict=feed_dict)
duration = time.time() - start_time
summary_writer.add_summary(summary_str, step)
summary_writer.flush()
print('step {:d} \t loss = {:.3f}, ({:.3f} sec/step)'.format(
step, loss_value, duration))
else:
loss_value, _ = sess.run([reduced_loss, train_op],
feed_dict=feed_dict)
coord.request_stop()
coord.join(threads)
FLAGS = tf.app.flags.FLAGS
FLAGS = tf.app.flags.FLAGS
tf.app.flags.DEFINE_string('data_dir', 'imagenet-data', """XXXX""")
tf.app.flags.DEFINE_string('train_dir', 'log',
"""Directory where to write event logs """
"""and checkpoint.""")
tf.app.flags.DEFINE_integer('max_steps', 700001,
"""Number of iterations to run.""")
tf.app.flags.DEFINE_string('model_file', 'model/DCNet_', """Directory to save model""")
is_training = tf.placeholder("bool")
train_set = ImagenetData(subset='train')
tr_images, tr_labels = alex2012_image_processing.distorted_inputs(train_set)
val_set = ImagenetData(subset='validation')
val_images, val_labels = alex2012_image_processing.inputs(val_set)
images, labels = tf.cond(is_training, lambda: [tr_images, tr_labels], lambda: [val_images, val_labels])
cnn = VGG()
cnn.build(images, train_set.num_classes(), is_training)
fit_loss = loss2(cnn.score, labels, train_set.num_classes(), 'c_entropy')
reg_loss = tf.add_n(tf.losses.get_regularization_losses())
orth_loss = tf.add_n(tf.get_collection('orth_constraint'))
loss_op = fit_loss + orth_loss + reg_loss