def eval_model(config, train_data, test_data, save_folder, logs_folder=None):
log.info("Config: {}".format(config.__dict__))
with tf.Graph().as_default():
np.random.seed(0)
tf.set_random_seed(1234)
exp_logger = ExperimentLogger(logs_folder)
# Builds models.
log.info("Building models")
mvalid = get_model(config)
# # A hack to load compatible models.
# variables = tf.global_variables()
# names = map(lambda x: x.name, variables)
# names = map(lambda x: x.replace("Model/", "Model/Towers/"), names)
# names = map(lambda x: x.replace(":0", ""), names)
# var_dict = dict(zip(names, variables))
# Initializes variables.
with tf.Session() as sess:
# saver = tf.train.Saver(var_dict)
saver = tf.train.Saver()
ckpt = tf.train.latest_checkpoint(save_folder)
# log.fatal(ckpt)
saver.restore(sess, ckpt)
train_acc = evaluate(sess, mvalid, train_data)
val_acc = evaluate(sess, mvalid, test_data)
niter = int(ckpt.split("-")[-1])
exp_logger.log_train_acc(niter, train_acc)
exp_logger.log_valid_acc(niter, val_acc)
return val_acc
def eval_model(config,
trn_model,
val_model,
save_folder,
logs_folder=None,
ckpt_num=-1):
log.info("Config: {}".format(config.__dict__))
exp_logger = ExperimentLogger(logs_folder)
# Initializes variables.
with tf.Session() as sess:
# Start the queue runners.
coord = tf.train.Coordinator()
threads = tf.train.start_queue_runners(sess=sess, coord=coord)
saver = tf.train.Saver()
if ckpt_num == -1:
ckpt = tf.train.latest_checkpoint(save_folder)
elif ckpt_num >= 0:
ckpt = os.path.join(save_folder, "model.ckpt-{}".format(ckpt_num))
else:
raise ValueError("Invalid checkpoint number {}".format(ckpt_num))
log.info("Restoring from {}".format(ckpt))
if not os.path.exists(ckpt + ".meta"):
raise ValueError("Checkpoint not exists")
saver.restore(sess, ckpt)
train_acc = evaluate(sess, trn_model, num_batch=100)
val_acc = evaluate(sess, val_model, num_batch=NUM_BATCH)
niter = int(ckpt.split("-")[-1])
exp_logger.log_train_acc(niter, train_acc)
exp_logger.log_valid_acc(niter, val_acc)
# Stop queues.
coord.request_stop()
coord.join(threads)
return val_acc
def train_model(exp_id,
config,
train_iter,
test_iter,
trainval_iter=None,
save_folder=None,
logs_folder=None):
"""Trains a CIFAR model.
Args:
exp_id: String. Experiment ID.
config: Config object
train_data: Dataset iterator.
test_data: Dataset iterator.
Returns:
acc: Final test accuracy
"""
# log.info("Config: {}".format(config.__dict__))
log.info("Config: {}".format(config.__dict__))
exp_logger = ExperimentLogger(logs_folder)
# Initializes variables.
with tf.Graph().as_default():
np.random.seed(0)
if not hasattr(config, "seed"):
tf.set_random_seed(1234)
log.info("Setting tensorflow random seed={:d}".format(1234))
else:
log.info("Setting tensorflow random seed={:d}".format(config.seed))
tf.set_random_seed(config.seed)
m, mvalid = _get_models(config)
with tf.Session() as sess:
saver = tf.train.Saver()
if FLAGS.restore:
log.info("Restore checkpoint \"{}\"".format(save_folder))
saver.restore(sess, tf.train.latest_checkpoint(save_folder))
else:
sess.run(tf.global_variables_initializer())
niter_start = int(m.global_step.eval())
w_list = tf.trainable_variables()
log.info("Model initialized.")
num_params = np.array([
np.prod(np.array([int(ss) for ss in w.get_shape()]))
for w in w_list
]).sum()
log.info('\033[92m' +
"Number of parameters {}".format(num_params) + '\033[00m')
# Set up learning rate schedule.
if config.lr_scheduler_type == "fixed":
lr_scheduler = FixedLearnRateScheduler(sess,
m,
config.base_learn_rate,
config.lr_decay_steps,
lr_list=config.lr_list)
else:
raise Exception("Unknown learning rate scheduler {}".format(
config.lr_scheduler))
for niter in tqdm(range(niter_start, config.max_train_iter),
desc=exp_id):
lr_scheduler.step(niter)
ce = train_step(sess, m, train_iter.next())
if (niter + 1) % config.disp_iter == 0 or niter == 0:
exp_logger.log_train_ce(niter, ce)
if (niter + 1) % config.valid_iter == 0 or niter == 0:
if trainval_iter is not None:
trainval_iter.reset()
acc = evaluate(sess, mvalid, trainval_iter)
exp_logger.log_train_acc(niter, acc)
test_iter.reset()
acc = evaluate(sess, mvalid, test_iter)
exp_logger.log_valid_acc(niter, acc)
if (niter + 1) % config.save_iter == 0 or niter == 0:
save(sess, saver, m.global_step, config, save_folder)
exp_logger.log_learn_rate(niter, m.lr.eval())
test_iter.reset()
acc = evaluate(sess, mvalid, test_iter)
return acc
def train_model(exp_id,
config,
train_iter,
test_iter,
trainval_iter=None,
save_folder=None,
logs_folder=None):
"""Trains a CIFAR model.
Args:
exp_id: String. Experiment ID.
config: Config object
train_data: Dataset iterator.
test_data: Dataset iterator.
Returns:
acc: Final test accuracy
"""
log.info("Config: {}".format(config.__dict__))
exp_logger = ExperimentLogger(logs_folder)
# Initializes variables.
with tf.Graph().as_default():
np.random.seed(0)
if not hasattr(config, "seed"):
tf.set_random_seed(1234)
log.info("Setting tensorflow random seed={:d}".format(1234))
else:
log.info("Setting tensorflow random seed={:d}".format(config.seed))
tf.set_random_seed(config.seed)
m, mvalid = get_models(config)
with tf.Session() as sess:
saver = tf.train.Saver()
sess.run(tf.global_variables_initializer())
# Set up learning rate schedule.
if config.lr_scheduler_type == "fixed":
lr_scheduler = FixedLearnRateScheduler(
sess,
m,
config.base_learn_rate,
config.lr_decay_steps,
lr_list=config.lr_list)
elif config.lr_scheduler_type == "exponential":
lr_scheduler = ExponentialLearnRateScheduler(
sess, m, config.base_learn_rate, config.lr_decay_offset,
config.max_train_iter, config.final_learn_rate,
config.lr_decay_interval)
else:
raise Exception("Unknown learning rate scheduler {}".format(
config.lr_scheduler))
for niter in tqdm(range(config.max_train_iter), desc=exp_id):
lr_scheduler.step(niter)
ce = train_step(sess, m, train_iter.next())
if (niter + 1) % config.disp_iter == 0 or niter == 0:
exp_logger.log_train_ce(niter, ce)
if (niter + 1) % config.valid_iter == 0 or niter == 0:
if trainval_iter is not None:
trainval_iter.reset()
acc = evaluate(sess, mvalid, trainval_iter)
exp_logger.log_train_acc(niter, acc)
test_iter.reset()
acc = evaluate(sess, mvalid, test_iter)
exp_logger.log_valid_acc(niter, acc)
if (niter + 1) % config.save_iter == 0 or niter == 0:
save(sess, saver, m.global_step, config, save_folder)
exp_logger.log_learn_rate(niter, m.lr.eval())
test_iter.reset()
acc = evaluate(test_iter, -1)
return acc
def train_model(exp_id,
config,
train_iter,
test_iter,
trainval_iter=None,
save_folder=None,
logs_folder=None):
log.info("congif:{}".format(config.__dict__)) #加入日志
exp_logger = ExperimentLogger(logs_folder)
# print(config.__dict__)
#初始化所有变量
with tf.Graph().as_default():
np.random.seed(0)
#设置tensorflow随机数
if not hasattr(config, "seed"): #具有什么属性
tf.set_random_seed(1234)
log.info("setting tesorflow random seed={:d}".format(1234))
else:
log.info("setting tensorflow random seed={:d}".format(config.seed))
tf.set_random_seed(config.seed)
#返回训练和验证的模型
m, mvalid = _get_models(config)
with tf.Session() as sess:
saver = tf.train.Saver()
#是否加载训练好的模型
if FLAGS.restore: #加载训练过的模型
log.info("Restore checkpoint \"{}\"".format(save_folder))
saver.restore(
sess, tf.train.latest_checkpoint(save_folder)) #加载存储好的模型
else:
sess.run(
tf.global_variables_initializer()) #如果是第一次训练，则需要初始化所有变量
#
niter_start = int(m.global_step.eval())
w_list = tf.trainable_variables()
log.info("Model initialized")
# 用来计算总的参数量
num_params = np.array([
np.prod(np.array([int(ss) for ss in w.get_shape()]))
for w in w_list
]).sum()
log.info("Number of parameters {}".format(num_params))
if config.lr_scheduler_type == "fixed":
lr_scheduler = FixedLearnRateScheduler(sess,
m,
config.base_learn_rate,
config.lr_decay_steps,
lr_list=config.lr_list)
else:
raise Exception(
"Unknown learning rate shceduler {}".format( #raise显示抛出异常
config.lr_scheduler))
for niter in tqdm(range(niter_start, config.max_train_iter),
desc=exp_id):
lr_scheduler.step(niter)
ce = train_step(sess, m, train_iter.next())
if (niter + 1) % config.disp_iter == 0 or niter == 0:
exp_logger.log_train_ce(niter, ce)
if (niter + 1) % config.valid_iter == 0 or niter == 0:
if trainval_iter is not None:
trainval_iter.reset()
acc = evaluate(sess, mvalid, trainval_iter)
exp_logger.log_train_ce(niter, acc)
test_iter.reset()
acc = evaluate(sess, mvalid, test_iter)
exp_logger.log_valid_acc(niter, acc)
if (niter + 1) % config.save_iter == 0 or niter == 0:
save(sess, saver, m.global_step, config, save_folder)
exp_logger.log_learn_rate(niter, m.lr.eval())
test_iter.reset()
acc = evaluate(sess, mvalid, test_iter)
return acc