##############
# print args #
##############
print(args)
sw = StopWatch()
if not args.no_copy:
print('Loading data streams from {}'.format(args.data_path))
print('Copying data to local machine...')
rsync = Rsync(args.tmpdir)
rsync.sync(args.data_path)
args.data_path = os.path.join(args.tmpdir,
os.path.basename(args.data_path))
sw.print_elapsed()
####################
# load data stream #
####################
train_datastream = get_datastream(path=args.data_path,
which_set=args.train_dataset,
batch_size=args.batch_size)
valid_datastream = get_datastream(path=args.data_path,
which_set=args.valid_dataset,
batch_size=args.batch_size)
test_datastream = get_datastream(path=args.data_path,
which_set=args.test_dataset,
batch_size=args.batch_size)
#################
##############
# print args #
##############
print(args)
sw = StopWatch()
if not args.no_copy:
print('Loading data streams from {}'.format(args.data_path))
print('Copying data to local machine...')
rsync = Rsync(args.tmpdir)
rsync.sync(args.data_path)
args.data_path = os.path.join(args.tmpdir,
os.path.basename(args.data_path))
sw.print_elapsed()
####################
# load data stream #
####################
train_datastream = get_datastream(path=args.data_path,
which_set=args.train_dataset,
batch_size=args.batch_size)
valid_datastream = get_datastream(path=args.data_path,
which_set=args.valid_dataset,
batch_size=args.batch_size)
test_datastream = get_datastream(path=args.data_path,
which_set=args.test_dataset,
batch_size=args.batch_size)
#################
def main():
print(' '.join(sys.argv))
args = get_args()
print(args)
print('Hostname: {}'.format(socket.gethostname()))
print('GPU: {}'.format(get_gpuname()))
if not args.start_from_ckpt:
if tf.gfile.Exists(args.log_dir):
tf.gfile.DeleteRecursively(args.log_dir)
tf.gfile.MakeDirs(args.log_dir)
tf.get_variable_scope()._reuse = None
_seed = args.base_seed + args.add_seed
tf.set_random_seed(_seed)
np.random.seed(_seed)
prefix_name = os.path.join(args.log_dir, 'model')
file_name = '%s.npz' % prefix_name
eval_summary = OrderedDict()
tg, sg = build_graph(args)
tg_ml_cost = tf.reduce_mean(tg.ml_cost)
global_step = tf.Variable(0, trainable=False, name="global_step")
tvars = tf.trainable_variables()
print([tvar.name for tvar in tvars])
ml_opt_func = tf.train.AdamOptimizer(learning_rate=args.learning_rate,
beta1=0.9,
beta2=0.99)
rl_opt_func = tf.train.AdamOptimizer(learning_rate=args.rl_learning_rate,
beta1=0.9,
beta2=0.99)
if args.grad_clip:
ml_grads, _ = tf.clip_by_global_norm(tf.gradients(tg_ml_cost, tvars),
clip_norm=1.0)
else:
ml_grads = tf.gradients(tg_ml_cost, tvars)
ml_op = ml_opt_func.apply_gradients(zip(ml_grads, tvars),
global_step=global_step)
tg_rl_cost = tf.reduce_mean(tg.rl_cost)
rl_grads = tf.gradients(tg_rl_cost, tvars)
# do not increase global step -- ml op increases it
rl_op = rl_opt_func.apply_gradients(zip(rl_grads, tvars))
tf.add_to_collection('n_fast_action', args.n_fast_action)
sync_data(args)
datasets = [args.train_dataset, args.valid_dataset, args.test_dataset]
train_set, valid_set, test_set = [
create_ivector_datastream(path=args.data_path,
which_set=dataset,
batch_size=args.n_batch,
min_after_cache=args.min_after_cache,
length_sort=not args.no_length_sort)
for dataset in datasets
]
init_op = tf.global_variables_initializer()
save_op = tf.train.Saver(max_to_keep=5)
best_save_op = tf.train.Saver(max_to_keep=5)
with tf.name_scope("per_step_eval"):
tr_ce = tf.placeholder(tf.float32)
tr_ce_summary = tf.summary.scalar("tr_ce", tr_ce)
tr_image = tf.placeholder(tf.float32)
tr_image_summary = tf.summary.image("tr_image", tr_image)
tr_fer = tf.placeholder(tf.float32)
tr_fer_summary = tf.summary.scalar("tr_fer", tr_fer)
tr_rl = tf.placeholder(tf.float32)
tr_rl_summary = tf.summary.scalar("tr_rl", tr_rl)
tr_rw_hist = tf.placeholder(tf.float32)
tr_rw_hist_summary = tf.summary.histogram("tr_reward_hist", tr_rw_hist)
with tf.name_scope("per_epoch_eval"):
best_val_ce = tf.placeholder(tf.float32)
val_ce = tf.placeholder(tf.float32)
best_val_ce_summary = tf.summary.scalar("best_valid_ce", best_val_ce)
val_ce_summary = tf.summary.scalar("valid_ce", val_ce)
vf = LinearVF()
with tf.Session() as sess:
sess.run(init_op)
if args.start_from_ckpt:
save_op = tf.train.import_meta_graph(
os.path.join(args.log_dir, 'model.ckpt.meta'))
save_op.restore(sess, os.path.join(args.log_dir, 'model.ckpt'))
print(
"Restore from the last checkpoint. Restarting from %d step." %
global_step.eval())
summary_writer = tf.summary.FileWriter(args.log_dir,
sess.graph,
flush_secs=5.0)
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0
tr_acc_count = 0
tr_rl_costs = []
tr_action_entropies = []
tr_rewards = []
_best_score = np.iinfo(np.int32).max
epoch_sw = StopWatch()
disp_sw = StopWatch()
eval_sw = StopWatch()
per_sw = StopWatch()
# For each epoch
for _epoch in xrange(args.n_epoch):
_n_exp = 0
epoch_sw.reset()
disp_sw.reset()
print('Epoch {} training'.format(_epoch + 1))
# For each batch
for batch in train_set.get_epoch_iterator():
x, x_mask, _, _, y, _ = batch
n_batch = x.shape[0]
_n_exp += n_batch
new_x, new_y, actions_1hot, rewards, action_entropies, new_x_mask, new_reward_mask, output_image = \
gen_episode_with_seg_reward(x, x_mask, y, sess, sg, args)
advantages, _ = compute_advantage(new_x, new_x_mask, rewards,
new_reward_mask, vf, args)
zero_state = gen_zero_state(n_batch, args.n_hidden)
feed_dict = {
tg.seq_x_data: new_x,
tg.seq_x_mask: new_x_mask,
tg.seq_y_data: new_y,
tg.seq_action: actions_1hot,
tg.seq_advantage: advantages,
tg.seq_action_mask: new_reward_mask,
tg.seq_y_data_for_action: new_y
}
feed_init_state(feed_dict, tg.init_state, zero_state)
_tr_ml_cost, _tr_rl_cost, _, _, pred_idx = \
sess.run([tg.ml_cost, tg.rl_cost, ml_op, rl_op, tg.pred_idx], feed_dict=feed_dict)
tr_ce_sum += _tr_ml_cost.sum()
tr_ce_count += new_x_mask.sum()
pred_idx = expand_output(actions_1hot, x_mask, new_x_mask,
pred_idx.reshape([n_batch, -1]),
args.n_fast_action)
tr_acc_sum += ((pred_idx == y) * x_mask).sum()
tr_acc_count += x_mask.sum()
_tr_ce_summary, _tr_fer_summary, _tr_rl_summary, _tr_image_summary, _tr_rw_hist_summary = \
sess.run([tr_ce_summary, tr_fer_summary, tr_rl_summary, tr_image_summary, tr_rw_hist_summary],
feed_dict={tr_ce: _tr_ml_cost.sum() / new_x_mask.sum(),
tr_fer: ((pred_idx == y) * x_mask).sum() / x_mask.sum(),
tr_rl: _tr_rl_cost.sum() / new_reward_mask.sum(),
tr_image: output_image, tr_rw_hist: rewards})
summary_writer.add_summary(_tr_ce_summary, global_step.eval())
summary_writer.add_summary(_tr_fer_summary, global_step.eval())
summary_writer.add_summary(_tr_rl_summary, global_step.eval())
summary_writer.add_summary(_tr_image_summary,
global_step.eval())
summary_writer.add_summary(_tr_rw_hist_summary,
global_step.eval())
tr_rl_costs.append(_tr_rl_cost.sum() / new_reward_mask.sum())
tr_action_entropies.append(action_entropies.sum() /
new_reward_mask.sum())
tr_rewards.append(rewards.sum() / new_reward_mask.sum())
if global_step.eval() % args.display_freq == 0:
avg_tr_ce = tr_ce_sum / tr_ce_count
avg_tr_fer = 1. - tr_acc_sum / tr_acc_count
avg_tr_rl_cost = np.asarray(tr_rl_costs).mean()
avg_tr_action_entropy = np.asarray(
tr_action_entropies).mean()
avg_tr_reward = np.asarray(tr_rewards).mean()
print(
"TRAIN: epoch={} iter={} ml_cost(ce/frame)={:.2f} fer={:.2f} rl_cost={:.4f} reward={:.4f} action_entropy={:.2f} time_taken={:.2f}"
.format(_epoch, global_step.eval(), avg_tr_ce,
avg_tr_fer, avg_tr_rl_cost, avg_tr_reward,
avg_tr_action_entropy, disp_sw.elapsed()))
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0.
tr_acc_count = 0
tr_rl_costs = []
tr_action_entropies = []
tr_rewards = []
disp_sw.reset()
print('--')
print('End of epoch {}'.format(_epoch + 1))
epoch_sw.print_elapsed()
print('Testing')
# Evaluate the model on the validation set
val_ce_sum = 0.
val_ce_count = 0
val_acc_sum = 0
val_acc_count = 0
val_rl_costs = []
val_action_entropies = []
val_rewards = []
eval_sw.reset()
for batch in valid_set.get_epoch_iterator():
x, x_mask, _, _, y, _ = batch
n_batch = x.shape[0]
new_x, new_y, actions_1hot, rewards, action_entropies, new_x_mask, new_reward_mask, output_image, new_y_sample = \
gen_episode_with_seg_reward(x, x_mask, y, sess, sg, args, sample_y=True)
advantages, _ = compute_advantage(new_x, new_x_mask, rewards,
new_reward_mask, vf, args)
zero_state = gen_zero_state(n_batch, args.n_hidden)
feed_dict = {
tg.seq_x_data: new_x,
tg.seq_x_mask: new_x_mask,
tg.seq_y_data: new_y,
tg.seq_action: actions_1hot,
tg.seq_advantage: advantages,
tg.seq_action_mask: new_reward_mask,
tg.seq_y_data_for_action: new_y_sample
}
feed_init_state(feed_dict, tg.init_state, zero_state)
_val_ml_cost, _val_rl_cost, pred_idx = sess.run(
[tg.ml_cost, tg.rl_cost, tg.pred_idx], feed_dict=feed_dict)
val_ce_sum += _val_ml_cost.sum()
val_ce_count += new_x_mask.sum()
pred_idx = expand_output(actions_1hot, x_mask, new_x_mask,
pred_idx.reshape([n_batch, -1]),
args.n_fast_action)
val_acc_sum += ((pred_idx == y) * x_mask).sum()
val_acc_count += x_mask.sum()
val_rl_costs.append(_val_rl_cost.sum() / new_reward_mask.sum())
val_action_entropies.append(action_entropies.sum() /
new_reward_mask.sum())
val_rewards.append(rewards.sum() / new_reward_mask.sum())
avg_val_ce = val_ce_sum / val_ce_count
avg_val_fer = 1. - val_acc_sum / val_acc_count
avg_val_rl_cost = np.asarray(val_rl_costs).mean()
avg_val_action_entropy = np.asarray(val_action_entropies).mean()
avg_val_reward = np.asarray(val_rewards).mean()
print(
"VALID: epoch={} ml_cost(ce/frame)={:.2f} fer={:.2f} rl_cost={:.4f} reward={:.4f} action_entropy={:.2f} time_taken={:.2f}"
.format(_epoch, avg_val_ce, avg_val_fer, avg_val_rl_cost,
avg_val_reward, avg_val_action_entropy,
eval_sw.elapsed()))
_val_ce_summary, = sess.run([val_ce_summary],
feed_dict={val_ce: avg_val_ce})
summary_writer.add_summary(_val_ce_summary, global_step.eval())
insert_item2dict(eval_summary, 'val_ce', avg_val_ce)
insert_item2dict(eval_summary, 'val_rl_cost', avg_val_rl_cost)
insert_item2dict(eval_summary, 'val_reward', avg_val_reward)
insert_item2dict(eval_summary, 'val_action_entropy',
avg_val_action_entropy)
insert_item2dict(eval_summary, 'time', eval_sw.elapsed())
save_npz2(file_name, eval_summary)
# Save model
if avg_val_ce < _best_score:
_best_score = avg_val_ce
best_ckpt = best_save_op.save(sess,
os.path.join(
args.log_dir,
"best_model.ckpt"),
global_step=global_step)
print("Best checkpoint stored in: %s" % best_ckpt)
ckpt = save_op.save(sess,
os.path.join(args.log_dir, "model.ckpt"),
global_step=global_step)
print("Checkpoint stored in: %s" % ckpt)
_best_val_ce_summary, = sess.run(
[best_val_ce_summary], feed_dict={best_val_ce: _best_score})
summary_writer.add_summary(_best_val_ce_summary,
global_step.eval())
summary_writer.close()
print("Optimization Finished.")
def main(_):
print(' '.join(sys.argv))
args = FLAGS
print(args.__flags)
if not args.start_from_ckpt:
if tf.gfile.Exists(args.log_dir):
tf.gfile.DeleteRecursively(args.log_dir)
tf.gfile.MakeDirs(args.log_dir)
tf.get_variable_scope()._reuse = None
_seed = args.base_seed + args.add_seed
tf.set_random_seed(_seed)
np.random.seed(_seed)
prefix_name = os.path.join(args.log_dir, 'model')
file_name = '%s.npz' % prefix_name
eval_summary = OrderedDict() #
tg = build_graph(args)
tg_ml_cost = tf.reduce_mean(tg.ml_cost)
global_step = tf.Variable(0, trainable=False, name="global_step")
tvars = tf.trainable_variables()
ml_opt_func = tf.train.AdamOptimizer(learning_rate=args.learning_rate,
beta1=0.9, beta2=0.99)
if args.grad_clip:
ml_grads, _ = tf.clip_by_global_norm(tf.gradients(tg_ml_cost, tvars),
clip_norm=1.0)
else:
ml_grads = tf.gradients(tg_ml_cost, tvars)
ml_op = ml_opt_func.apply_gradients(zip(ml_grads, tvars), global_step=global_step)
sync_data(args)
datasets = [args.train_dataset, args.valid_dataset, args.test_dataset]
train_set, valid_set, test_set = [create_ivector_datastream(path=args.data_path, which_set=dataset,
batch_size=args.batch_size, min_after_cache=args.min_after_cache, length_sort=not args.no_length_sort) for dataset in datasets]
init_op = tf.global_variables_initializer()
save_op = tf.train.Saver(max_to_keep=5)
best_save_op = tf.train.Saver(max_to_keep=5)
with tf.name_scope("per_step_eval"):
tr_ce = tf.placeholder(tf.float32)
tr_ce_summary = tf.summary.scalar("tr_ce", tr_ce)
with tf.name_scope("per_epoch_eval"):
best_val_ce = tf.placeholder(tf.float32)
val_ce = tf.placeholder(tf.float32)
best_val_ce_summary = tf.summary.scalar("best_valid_ce", best_val_ce)
val_ce_summary = tf.summary.scalar("valid_ce", val_ce)
with tf.Session() as sess:
sess.run(init_op)
if args.start_from_ckpt:
save_op = tf.train.import_meta_graph(os.path.join(args.log_dir,
'model.ckpt.meta'))
save_op.restore(sess, os.path.join(args.log_dir, 'model.ckpt'))
print("Restore from the last checkpoint. "
"Restarting from %d step." % global_step.eval())
summary_writer = tf.summary.FileWriter(args.log_dir, sess.graph, flush_secs=5.0)
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0
tr_acc_count = 0
_best_score = np.iinfo(np.int32).max
epoch_sw = StopWatch()
disp_sw = StopWatch()
eval_sw = StopWatch()
per_sw = StopWatch()
# For each epoch
for _epoch in xrange(args.n_epoch):
_n_exp = 0
epoch_sw.reset()
disp_sw.reset()
print('--')
print('Epoch {} training'.format(_epoch+1))
# For each batch
for batch in train_set.get_epoch_iterator():
orig_x, orig_x_mask, _, _, orig_y, _ = batch
# Get skipped frames
for sub_batch in skip_frames_fixed([orig_x, orig_x_mask, orig_y], args.n_skip+1):
x, x_mask, y = sub_batch
n_batch, _, _ = x.shape
_feed_states = initial_states(n_batch, args.n_hidden)
_tr_ml_cost, _seq_logit, _ = sess.run([tg.ml_cost,
tg.seq_logit,
ml_op],
feed_dict={tg.seq_x_data: x,
tg.seq_x_mask: x_mask,
tg.seq_y_data: y,
tg.init_state: _feed_states})
tr_ce_sum += _tr_ml_cost.sum()
tr_ce_count += x_mask.sum()
_tr_ce_summary, = sess.run([tr_ce_summary], feed_dict={tr_ce: _tr_ml_cost.sum() / x_mask.sum()})
summary_writer.add_summary(_tr_ce_summary, global_step.eval())
_, n_seq = orig_y.shape
_expand_seq_logit = interpolate_feat(_seq_logit, num_skips=args.n_skip+1, axis=1, use_bidir=True)
_pred_idx = _expand_seq_logit.argmax(axis=2)
tr_acc_sum += ((_pred_idx == orig_y) * orig_x_mask).sum()
tr_acc_count += orig_x_mask.sum()
if global_step.eval() % args.display_freq == 0:
avg_tr_ce = tr_ce_sum / tr_ce_count
avg_tr_fer = 1. - float(tr_acc_sum) / tr_acc_count
print("TRAIN: epoch={} iter={} ml_cost(ce/frame)={:.2f} fer={:.2f} time_taken={:.2f}".format(
_epoch, global_step.eval(), avg_tr_ce, avg_tr_fer, disp_sw.elapsed()))
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0
tr_acc_count = 0
disp_sw.reset()
print('--')
print('End of epoch {}'.format(_epoch+1))
epoch_sw.print_elapsed()
print('Testing')
# Evaluate the model on the validation set
val_ce_sum = 0.
val_ce_count = 0
val_acc_sum = 0
val_acc_count = 0
eval_sw.reset()
for batch in valid_set.get_epoch_iterator():
orig_x, orig_x_mask, _, _, orig_y, _ = batch
for sub_batch in skip_frames_fixed([orig_x, orig_x_mask, orig_y], args.n_skip+1, return_first=True):
x, x_mask, y = sub_batch
n_batch, _, _ = x.shape
_feed_states = initial_states(n_batch, args.n_hidden)
_val_ml_cost, _seq_logit = sess.run([tg.ml_cost,
tg.seq_logit,],
feed_dict={tg.seq_x_data: x,
tg.seq_x_mask: x_mask,
tg.seq_y_data: y,
tg.init_state: _feed_states})
val_ce_sum += _val_ml_cost.sum()
val_ce_count += x_mask.sum()
_, n_seq = orig_y.shape
_expand_seq_logit = interpolate_feat(_seq_logit, num_skips=args.n_skip+1, axis=1, use_bidir=True)
_pred_idx = _expand_seq_logit.argmax(axis=2)
val_acc_sum += ((_pred_idx == orig_y) * orig_x_mask).sum()
val_acc_count += orig_x_mask.sum()
avg_val_ce = val_ce_sum / val_ce_count
avg_val_fer = 1. - float(val_acc_sum) / val_acc_count
print("VALID: epoch={} ml_cost(ce/frame)={:.2f} fer={:.2f} time_taken={:.2f}".format(
_epoch, avg_val_ce, avg_val_fer, eval_sw.elapsed()))
_val_ce_summary, = sess.run([val_ce_summary], feed_dict={val_ce: avg_val_ce})
summary_writer.add_summary(_val_ce_summary, global_step.eval())
insert_item2dict(eval_summary, 'val_ce', avg_val_ce)
insert_item2dict(eval_summary, 'time', eval_sw.elapsed())
save_npz2(file_name, eval_summary)
# Save model
if avg_val_ce < _best_score:
_best_score = avg_val_ce
best_ckpt = best_save_op.save(sess, os.path.join(args.log_dir,
"best_model.ckpt"),
global_step=global_step)
print("Best checkpoint stored in: %s" % best_ckpt)
ckpt = save_op.save(sess, os.path.join(args.log_dir, "model.ckpt"),
global_step=global_step)
print("Checkpoint stored in: %s" % ckpt)
_best_val_ce_summary, = sess.run([best_val_ce_summary],
feed_dict={best_val_ce: _best_score})
summary_writer.add_summary(_best_val_ce_summary, global_step.eval())
summary_writer.close()
print("Optimization Finished.")
[s.s for s in tr_summary],
feed_dict={
tr_summary.ce.ph: ce.avg(),
tr_summary.cr.ph: cr.avg(),
tr_summary.image.ph: output_image
})
for s in summaries:
summary_writer.add_summary(s, global_step.eval())
for accu in accu_list:
accu.reset()
disp_sw.reset()
print('--')
print('End of epoch {}'.format(_epoch))
epoch_sw.print_elapsed()
print('Testing')
# Evaluate the model on the validation set
for accu in accu_list:
accu.reset()
eval_sw.reset()
for batch in valid_set.get_epoch_iterator():
orig_x, orig_x_mask, _, _, orig_y, _ = batch
sub_batch, start_idx = utils.skip_frames_fixed(
[orig_x, orig_x_mask, orig_y],
args.n_skip + 1,
return_first=True,
return_start_idx=True)
def train_model():
sw = StopWatch()
# Fix random seeds
rand_seed = FLAGS.base_seed + FLAGS.add_seed
tf.set_random_seed(rand_seed)
np.random.seed(rand_seed)
# Get module graph
model_graph = build_graph(FLAGS)
# Get model parameter
model_param = tf.get_collection(tf.GraphKeys.TRAINABLE_VARIABLES)
# Set weight decay
if FLAGS.weight_decay > 0.0:
l2_cost = tf.add_n([
0.5 * tf.nn.l2_loss(W) for W in model_param if 'W' in W.name
and 'action' not in W.name and 'baseline' not in W.name
])
l2_cost *= FLAGS.weight_decay
else:
l2_cost = 0.0
# Set total cost
model_total_cost = model_graph.ml_cost + model_graph.rl_cost + model_graph.bl_cost + l2_cost
# Define global training step
global_step = tf.contrib.framework.get_or_create_global_step()
# Set ml optimizer (Adam optimizer, in the original paper, we use 0.99 for beta2
model_opt = tf.train.AdamOptimizer(learning_rate=FLAGS.learning_rate,
name='model_optimizer')
model_grad = tf.gradients(ys=model_total_cost,
xs=model_param,
aggregation_method=2)
# Set gradient clipping
if FLAGS.grad_clip > 0.0:
model_grad, _ = tf.clip_by_global_norm(t_list=model_grad,
clip_norm=FLAGS.grad_clip)
model_update = model_opt.apply_gradients(grads_and_vars=zip(
model_grad, model_param),
global_step=global_step)
# Set dataset (sync_data(FLAGS))
datasets = [FLAGS.train_dataset, FLAGS.valid_dataset, FLAGS.test_dataset]
train_set, valid_set, test_set = [
create_ivector_datastream(path=FLAGS.data_path,
which_set=dataset,
batch_size=FLAGS.batch_size)
for dataset in datasets
]
# Set variable initializer
init_op = tf.global_variables_initializer()
# Set last model saver
last_save_op = tf.train.Saver(max_to_keep=5)
# Set best model saver
best_save_op = tf.train.Saver(max_to_keep=5)
# Get hardware config
config = tf.ConfigProto()
config.gpu_options.allow_growth = True
# Set session
with tf.Session(config=config) as sess:
# Get summary
merged_summary = tf.summary.merge_all()
train_writer = tf.summary.FileWriter(FLAGS.log_dir + '/train',
sess.graph)
# Init model
sess.run(init_op)
# Load checkpoint
if FLAGS.start_from_ckpt:
last_save_op = tf.train.import_meta_graph(
os.path.join(FLAGS.log_dir, 'last_model.ckpt.meta'))
last_save_op.restore(
sess, os.path.join(FLAGS.log_dir, 'last_model.ckpt'))
print(
"Restore from the last checkpoint. Restarting from %d step." %
global_step.eval())
# For each epoch
accr_history = []
loss_history = []
ml_cost_history = []
rl_cost_history = []
bl_cost_history = []
sum_cost_history = []
best_accr = 0.0
sw.reset()
for e_idx in xrange(FLAGS.n_epoch):
# for each batch (update)
for b_idx, batch_data in enumerate(train_set.get_epoch_iterator()):
# Get data x, y
x_data, x_mask, _, _, y_data, _ = batch_data
# Roll axis
x_data = x_data.transpose((1, 0, 2))
x_mask = x_mask.transpose((1, 0))
y_data = y_data.transpose((1, 0))
# Update model
mean_accr, mean_loss, ml_cost, rl_cost, bl_cost, read_ratio, summary_output \
= updater(model_graph=model_graph,
model_updater=model_update,
x_data=x_data,
x_mask=x_mask,
y_data=y_data,
summary=merged_summary,
session=sess)
# write summary
train_writer.add_summary(summary_output, global_step.eval())
accr_history.append(mean_accr)
loss_history.append(mean_loss)
ml_cost_history.append(ml_cost)
rl_cost_history.append(rl_cost)
bl_cost_history.append(bl_cost)
sum_cost_history.append(ml_cost + rl_cost + bl_cost)
# Display results
if global_step.eval() % FLAGS.display_freq == 0:
mean_accr = np.array(accr_history).mean()
mean_loss = np.array(loss_history).mean()
mean_ml_cost = np.array(ml_cost_history).mean()
mean_rl_cost = np.array(rl_cost_history).mean()
mean_bl_cost = np.array(bl_cost_history).mean()
mean_sum_cost = np.array(sum_cost_history).mean()
print(
"====================================================")
print("Epoch " + str(e_idx) + ", Total Iter " +
str(global_step.eval()))
print(
"----------------------------------------------------")
print("Average FER: {:.2f}%".format(
(1.0 - mean_accr) * 100))
print("Average CCE: {:.6f}".format(mean_loss))
print("Average ML: {:.6f}".format(mean_ml_cost))
if FLAGS.use_skim:
print("Average RL: {:.6f}".format(mean_rl_cost))
print("Average BL: {:.6f}".format(mean_bl_cost))
print("Average SUM: {:.6f}".format(mean_sum_cost))
print("Read ratio: ", read_ratio)
sw.print_elapsed()
sw.reset()
last_ckpt = last_save_op.save(sess,
os.path.join(
FLAGS.log_dir,
"last_model.ckpt"),
global_step=global_step)
print("Last checkpointed in: %s" % last_ckpt)
accr_history = []
loss_history = []
ml_cost_history = []
rl_cost_history = []
bl_cost_history = []
sum_cost_history = []
# Evaluate model
if global_step.eval() % FLAGS.evaluation_freq == 0:
# Monitor validation loss, accr
valid_accr, valid_cce = evaluation(model_graph=model_graph,
session=sess,
dataset=valid_set)
# Save model
if best_accr < valid_accr:
best_accr = valid_accr
best_ckpt = best_save_op.save(sess,
os.path.join(
FLAGS.log_dir,
"best_model.ckpt"),
global_step=global_step)
print("Best checkpoint stored in: %s" % best_ckpt)
print(
"----------------------------------------------------")
print("Validation evaluation")
print(
"----------------------------------------------------")
print("FER: {:.2f}%".format((1.0 - valid_accr) * 100.))
print("CCE: {:.6f}".format(valid_cce))
print(
"----------------------------------------------------")
print("Best FER: {:.2f}%".format((1.0 - best_accr) * 100.))
print("Optimization Finished.")
def main(_):
# Print settings
print(' '.join(sys.argv))
args = FLAGS
for k, v in args.__flags.iteritems():
print(k, v)
# Load checkpoint
if not args.start_from_ckpt:
if tf.gfile.Exists(args.log_dir):
tf.gfile.DeleteRecursively(args.log_dir)
tf.gfile.MakeDirs(args.log_dir)
# ???
tf.get_variable_scope()._reuse = None
# Set random seed
_seed = args.base_seed + args.add_seed
tf.set_random_seed(_seed)
np.random.seed(_seed)
# Set save file name
prefix_name = os.path.join(args.log_dir, 'model')
file_name = '%s.npz' % prefix_name
# Set evaluation summary
eval_summary = OrderedDict()
# Build model graph
tg, sg = build_graph(args)
# Set linear regressor for baseline
vf = LinearVF()
# Set global step
global_step = tf.Variable(0, trainable=False, name="global_step")
# Get ml/rl related parameters
tvars = tf.trainable_variables()
ml_vars = [tvar for tvar in tvars if "action" not in tvar.name]
rl_vars = [tvar for tvar in tvars if "action" in tvar.name]
# Set optimizer
ml_opt_func = tf.train.AdamOptimizer(learning_rate=args.learning_rate)
rl_opt_func = tf.train.AdamOptimizer(learning_rate=args.rl_learning_rate)
# Set model ml cost (sum over all and divide it by batch_size)
ml_cost = tf.reduce_sum(tg.seq_ml_cost)
ml_cost /= tf.to_float(tf.shape(tg.seq_x_data)[0])
ml_cost += args.ml_l2 * 0.5 * tf.add_n(
[tf.reduce_sum(tf.square(var)) for var in ml_vars])
# Set model rl cost (sum over all and divide it by batch_size, also entropy cost)
rl_cost = tg.seq_rl_cost - args.ent_weight * tg.seq_a_ent
rl_cost = tf.reduce_sum(rl_cost)
rl_cost /= tf.to_float(tf.shape(tg.seq_x_data)[0])
# Set model rl cost (sum over all and divide it by batch_size, also entropy cost)
real_rl_cost = tf.reduce_sum(tg.seq_real_rl_cost)
real_rl_cost /= tf.reduce_sum(tg.seq_a_mask)
# Gradient clipping for ML
ml_grads = tf.gradients(ml_cost, ml_vars)
if args.grad_clip > 0.0:
ml_grads, _ = tf.clip_by_global_norm(t_list=ml_grads,
clip_norm=args.grad_clip)
# Gradient for RL
rl_grads = tf.gradients(rl_cost, rl_vars)
# ML optimization
ml_op = ml_opt_func.apply_gradients(grads_and_vars=zip(ml_grads, ml_vars),
global_step=global_step,
name='ml_op')
# RL optimization
rl_op = rl_opt_func.apply_gradients(grads_and_vars=zip(rl_grads, rl_vars),
global_step=global_step,
name='rl_op')
# Sync dataset
sync_data(args)
# Get dataset
train_set = create_ivector_datastream(path=args.data_path,
which_set=args.train_dataset,
batch_size=args.batch_size,
min_after_cache=args.min_after_cache,
length_sort=not args.no_length_sort)
valid_set = create_ivector_datastream(path=args.data_path,
which_set=args.valid_dataset,
batch_size=args.batch_size,
min_after_cache=args.min_after_cache,
length_sort=not args.no_length_sort)
# Set param init op
init_op = tf.global_variables_initializer()
# Set save op
save_op = tf.train.Saver(max_to_keep=5)
best_save_op = tf.train.Saver(max_to_keep=5)
# Set per-step logging
with tf.name_scope("per_step_eval"):
# For ML cost (ce)
tr_ce = tf.placeholder(tf.float32)
tr_ce_summary = tf.summary.scalar("train_ml_cost", tr_ce)
# For output visualization
tr_image = tf.placeholder(tf.float32)
tr_image_summary = tf.summary.image("train_image", tr_image)
# For ML FER
tr_fer = tf.placeholder(tf.float32)
tr_fer_summary = tf.summary.scalar("train_fer", tr_fer)
# For RL cost
tr_rl = tf.placeholder(tf.float32)
tr_rl_summary = tf.summary.scalar("train_rl", tr_rl)
# For RL reward
tr_reward = tf.placeholder(tf.float32)
tr_reward_summary = tf.summary.scalar("train_reward", tr_reward)
# For RL entropy
tr_ent = tf.placeholder(tf.float32)
tr_ent_summary = tf.summary.scalar("train_entropy", tr_ent)
# For RL reward histogram
tr_rw_hist = tf.placeholder(tf.float32)
tr_rw_hist_summary = tf.summary.histogram("train_reward_hist",
tr_rw_hist)
# For RL skip count
tr_skip_cnt = tf.placeholder(tf.float32)
tr_skip_cnt_summary = tf.summary.scalar("train_skip_cnt", tr_skip_cnt)
# Set per-epoch logging
with tf.name_scope("per_epoch_eval"):
# For best valid ML cost (full)
best_val_ce = tf.placeholder(tf.float32)
best_val_ce_summary = tf.summary.scalar("best_valid_ce", best_val_ce)
# For best valid FER
best_val_fer = tf.placeholder(tf.float32)
best_val_fer_summary = tf.summary.scalar("best_valid_fer",
best_val_fer)
# For valid ML cost (full)
val_ce = tf.placeholder(tf.float32)
val_ce_summary = tf.summary.scalar("valid_ce", val_ce)
# For valid FER
val_fer = tf.placeholder(tf.float32)
val_fer_summary = tf.summary.scalar("valid_fer", val_fer)
# For output visualization
val_image = tf.placeholder(tf.float32)
val_image_summary = tf.summary.image("valid_image", val_image)
# For RL skip count
val_skip_cnt = tf.placeholder(tf.float32)
val_skip_cnt_summary = tf.summary.scalar("valid_skip_cnt",
val_skip_cnt)
# Set module
gen_episodes = improve_skip_rnn_act_parallel
# Init session
with tf.Session() as sess:
# Init model
sess.run(init_op)
# Load from checkpoint
if args.start_from_ckpt:
save_op = tf.train.import_meta_graph(
os.path.join(args.log_dir, 'model.ckpt.meta'))
save_op.restore(sess, os.path.join(args.log_dir, 'model.ckpt'))
print(
"Restore from the last checkpoint. Restarting from %d step." %
global_step.eval())
# Summary writer
summary_writer = tf.summary.FileWriter(args.log_dir,
sess.graph,
flush_secs=5.0)
# For train tracking
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0.
tr_acc_count = 0
tr_rl_sum = 0.
tr_rl_count = 0
tr_ent_sum = 0.
tr_ent_count = 0
tr_reward_sum = 0.
tr_reward_count = 0
tr_skip_sum = 0.
tr_skip_count = 0
_best_ce = np.iinfo(np.int32).max
_best_fer = 1.00
# For time measure
epoch_sw = StopWatch()
disp_sw = StopWatch()
eval_sw = StopWatch()
# For each epoch
for _epoch in xrange(args.n_epoch):
# Reset timer
epoch_sw.reset()
disp_sw.reset()
print('Epoch {} training'.format(_epoch + 1))
# Set rl skipping flag
use_rl_skipping = True
# For each batch (update)
for batch_data in train_set.get_epoch_iterator():
##################
# Sampling Phase #
##################
# Get batch data
seq_x_data, seq_x_mask, _, _, seq_y_data, _ = batch_data
# Use skipping
if use_rl_skipping:
# Transpose axis
seq_x_data = np.transpose(seq_x_data, (1, 0, 2))
seq_x_mask = np.transpose(seq_x_mask, (1, 0))
seq_y_data = np.transpose(seq_y_data, (1, 0))
# Number of samples
batch_size = seq_x_data.shape[1]
# Sample actions (episode generation)
[
skip_x_data, skip_h_data, skip_x_mask, skip_y_data,
skip_a_data, skip_a_mask, skip_rewards, result_image
] = gen_episodes(seq_x_data=seq_x_data,
seq_x_mask=seq_x_mask,
seq_y_data=seq_y_data,
sess=sess,
sample_graph=sg,
args=args,
use_sampling=True)
# Compute skip ratio
tr_skip_sum += skip_x_mask.sum() / seq_x_mask.sum()
tr_skip_count += 1.0
# Compute baseline and refine reward
skip_advantage, skip_disc_rewards = compute_advantage(
seq_h_data=skip_h_data,
seq_r_data=skip_rewards,
seq_r_mask=skip_a_mask,
vf=vf,
args=args,
final_cost=args.use_final_reward)
if args.use_baseline is False:
skip_advantage = skip_disc_rewards
##################
# Training Phase #
##################
# Update model
[
_tr_ml_cost, _tr_rl_cost, _, _, _tr_act_ent,
_tr_pred_logit
] = sess.run(
[
ml_cost, real_rl_cost, ml_op, rl_op, tg.seq_a_ent,
tg.seq_label_logits
],
feed_dict={
tg.seq_x_data: skip_x_data,
tg.seq_x_mask: skip_x_mask,
tg.seq_y_data: skip_y_data,
tg.seq_a_data: skip_a_data,
tg.seq_a_mask: skip_a_mask,
tg.seq_advantage: skip_advantage,
tg.seq_reward: skip_disc_rewards
})
seq_x_mask = np.transpose(seq_x_mask, (1, 0))
seq_y_data = np.transpose(seq_y_data, (1, 0))
# Get full sequence prediction
_tr_pred_full = expand_pred_idx(
seq_skip_1hot=skip_a_data,
seq_skip_mask=skip_a_mask,
seq_prd_idx=_tr_pred_logit.argmax(axis=-1).reshape(
[batch_size, -1]),
seq_x_mask=seq_y_data)
# Update history
tr_ce_sum += _tr_ml_cost.sum() * batch_size
tr_ce_count += skip_x_mask.sum()
tr_acc_sum += ((_tr_pred_full == seq_y_data) *
seq_x_mask).sum()
tr_acc_count += seq_x_mask.sum()
tr_rl_sum += _tr_rl_cost.sum()
tr_rl_count += 1.0
tr_ent_sum += _tr_act_ent.sum()
tr_ent_count += skip_a_mask.sum()
tr_reward_sum += (skip_rewards * skip_a_mask).sum()
tr_reward_count += skip_a_mask.sum()
################
# Write result #
################
[
_tr_rl_summary, _tr_image_summary, _tr_ent_summary,
_tr_reward_summary, _tr_rw_hist_summary,
_tr_skip_cnt_summary
] = sess.run(
[
tr_rl_summary, tr_image_summary, tr_ent_summary,
tr_reward_summary, tr_rw_hist_summary,
tr_skip_cnt_summary
],
feed_dict={
tr_rl:
_tr_rl_cost.sum(),
tr_image:
result_image,
tr_ent: (_tr_act_ent.sum() / skip_a_mask.sum()),
tr_reward: ((skip_rewards * skip_a_mask).sum() /
skip_a_mask.sum()),
tr_rw_hist:
skip_rewards,
tr_skip_cnt:
skip_x_mask.sum() / seq_x_mask.sum()
})
summary_writer.add_summary(_tr_rl_summary,
global_step.eval())
summary_writer.add_summary(_tr_image_summary,
global_step.eval())
summary_writer.add_summary(_tr_ent_summary,
global_step.eval())
summary_writer.add_summary(_tr_reward_summary,
global_step.eval())
summary_writer.add_summary(_tr_rw_hist_summary,
global_step.eval())
summary_writer.add_summary(_tr_skip_cnt_summary,
global_step.eval())
else:
# Number of samples
batch_size = seq_x_data.shape[0]
##################
# Training Phase #
##################
[_tr_ml_cost, _, _tr_pred_full] = sess.run(
[ml_cost, ml_op, tg.seq_label_logits],
feed_dict={
tg.seq_x_data: seq_x_data,
tg.seq_x_mask: seq_x_mask,
tg.seq_y_data: seq_y_data
})
_tr_pred_full = np.reshape(_tr_pred_full.argmax(axis=1),
seq_y_data.shape)
# Update history
tr_ce_sum += _tr_ml_cost.sum() * batch_size
tr_ce_count += seq_x_mask.sum()
tr_acc_sum += ((_tr_pred_full == seq_y_data) *
seq_x_mask).sum()
tr_acc_count += seq_x_mask.sum()
skip_x_mask = seq_x_mask
################
# Write result #
################
[_tr_ce_summary, _tr_fer_summary] = sess.run(
[tr_ce_summary, tr_fer_summary],
feed_dict={
tr_ce:
(_tr_ml_cost.sum() * batch_size) / skip_x_mask.sum(),
tr_fer:
((_tr_pred_full == seq_y_data) * seq_x_mask).sum() /
seq_x_mask.sum()
})
summary_writer.add_summary(_tr_ce_summary, global_step.eval())
summary_writer.add_summary(_tr_fer_summary, global_step.eval())
# Display results
if global_step.eval() % args.display_freq == 0:
# Get average results
avg_tr_ce = tr_ce_sum / tr_ce_count
avg_tr_fer = 1. - tr_acc_sum / tr_acc_count
if use_rl_skipping:
avg_tr_rl = tr_rl_sum / tr_rl_count
avg_tr_ent = tr_ent_sum / tr_ent_count
avg_tr_reward = tr_reward_sum / tr_reward_count
avg_tr_skip = tr_skip_sum / tr_skip_count
print(
"TRAIN: epoch={} iter={} "
"ml_cost(ce/frame)={:.2f} fer={:.2f} "
"rl_cost={:.4f} reward={:.4f} action_entropy={:.2f} "
"skip_ratio={:.2f} "
"time_taken={:.2f}".format(_epoch,
global_step.eval(),
avg_tr_ce, avg_tr_fer,
avg_tr_rl,
avg_tr_reward,
avg_tr_ent, avg_tr_skip,
disp_sw.elapsed()))
else:
print("TRAIN: epoch={} iter={} "
"ml_cost(ce/frame)={:.2f} fer={:.2f} "
"time_taken={:.2f}".format(
_epoch, global_step.eval(), avg_tr_ce,
avg_tr_fer, disp_sw.elapsed()))
# Reset average results
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0.
tr_acc_count = 0
tr_rl_sum = 0.
tr_rl_count = 0
tr_ent_sum = 0.
tr_ent_count = 0
tr_reward_sum = 0.
tr_reward_count = 0
tr_skip_sum = 0.
tr_skip_count = 0
disp_sw.reset()
# End of epoch
print('--')
print('End of epoch {}'.format(_epoch + 1))
epoch_sw.print_elapsed()
# Evaluation
print('Testing')
# Evaluate the model on the validation set
val_ce_sum = 0.
val_ce_count = 0
val_acc_sum = 0.
val_acc_count = 0
val_rl_sum = 0.
val_rl_count = 0
val_ent_sum = 0.
val_ent_count = 0
val_reward_sum = 0.
val_reward_count = 0
val_skip_sum = 0.
val_skip_count = 0
eval_sw.reset()
# For each batch in Valid
for batch_data in valid_set.get_epoch_iterator():
##################
# Sampling Phase #
##################
# Get batch data
seq_x_data, seq_x_mask, _, _, seq_y_data, _ = batch_data
if use_rl_skipping:
# Transpose axis
seq_x_data = np.transpose(seq_x_data, (1, 0, 2))
seq_x_mask = np.transpose(seq_x_mask, (1, 0))
seq_y_data = np.transpose(seq_y_data, (1, 0))
# Number of samples
batch_size = seq_x_data.shape[1]
# Sample actions (episode generation)
[
skip_x_data, skip_h_data, skip_x_mask, skip_y_data,
skip_a_data, skip_a_mask, skip_rewards, result_image
] = gen_episodes(seq_x_data=seq_x_data,
seq_x_mask=seq_x_mask,
seq_y_data=seq_y_data,
sess=sess,
sample_graph=sg,
args=args,
use_sampling=False)
# Compute skip ratio
val_skip_sum += skip_x_mask.sum() / seq_x_mask.sum()
val_skip_count += 1.0
# Compute baseline and refine reward
skip_advantage, skip_disc_rewards = compute_advantage(
seq_h_data=skip_h_data,
seq_r_data=skip_rewards,
seq_r_mask=skip_a_mask,
vf=vf,
args=args,
final_cost=args.use_final_reward)
if args.use_baseline is False:
skip_advantage = skip_disc_rewards
#################
# Forward Phase #
#################
[
_val_ml_cost, _val_rl_cost, _val_pred_logit,
_val_action_ent
] = sess.run(
[
ml_cost, real_rl_cost, tg.seq_label_logits,
tg.seq_a_ent
],
feed_dict={
tg.seq_x_data: skip_x_data,
tg.seq_x_mask: skip_x_mask,
tg.seq_y_data: skip_y_data,
tg.seq_a_data: skip_a_data,
tg.seq_a_mask: skip_a_mask,
tg.seq_advantage: skip_advantage,
tg.seq_reward: skip_disc_rewards
})
seq_x_mask = np.transpose(seq_x_mask, (1, 0))
seq_y_data = np.transpose(seq_y_data, (1, 0))
# Get full sequence prediction
_val_pred_full = expand_pred_idx(
seq_skip_1hot=skip_a_data,
seq_skip_mask=skip_a_mask,
seq_prd_idx=_val_pred_logit.argmax(axis=-1).reshape(
[batch_size, -1]),
seq_x_mask=seq_y_data)
# Update history
val_ce_sum += _val_ml_cost.sum() * batch_size
val_ce_count += skip_x_mask.sum()
val_acc_sum += ((_val_pred_full == seq_y_data) *
seq_x_mask).sum()
val_acc_count += seq_x_mask.sum()
val_rl_sum += _val_rl_cost.sum()
val_rl_count += 1.0
val_ent_sum += _val_action_ent.sum()
val_ent_count += skip_a_mask.sum()
val_reward_sum += (skip_rewards * skip_a_mask).sum()
val_reward_count += skip_a_mask.sum()
else:
# Number of samples
batch_size = seq_x_data.shape[0]
#################
# Forward Phase #
#################
# Update model
[_val_ml_cost, _val_pred_full] = sess.run(
[ml_cost, tg.seq_label_logits],
feed_dict={
tg.seq_x_data: seq_x_data,
tg.seq_x_mask: seq_x_mask,
tg.seq_y_data: seq_y_data
})
_val_pred_full = np.reshape(_val_pred_full.argmax(axis=1),
seq_y_data.shape)
# Update history
val_ce_sum += _val_ml_cost.sum() * batch_size
val_ce_count += seq_x_mask.sum()
val_acc_sum += ((_val_pred_full == seq_y_data) *
seq_x_mask).sum()
val_acc_count += seq_x_mask.sum()
# Aggregate over all valid data
avg_val_ce = val_ce_sum / val_ce_count
avg_val_fer = 1. - val_acc_sum / val_acc_count
if use_rl_skipping:
avg_val_rl = val_rl_sum / val_rl_count
avg_val_ent = val_ent_sum / val_ent_count
avg_val_reward = val_reward_sum / val_reward_count
avg_val_skip = val_skip_sum / val_skip_count
print("VALID: epoch={} "
"ml_cost(ce/frame)={:.2f} fer={:.2f} "
"rl_cost={:.4f} reward={:.4f} action_entropy={:.2f} "
"skip_ratio={:.2f} "
"time_taken={:.2f}".format(_epoch, avg_val_ce,
avg_val_fer, avg_val_rl,
avg_val_reward,
avg_val_ent, avg_val_skip,
eval_sw.elapsed()))
else:
print("VALID: epoch={} "
"ml_cost(ce/frame)={:.2f} fer={:.2f} "
"time_taken={:.2f}".format(_epoch,
avg_val_ce, avg_val_fer,
eval_sw.elapsed()))
################
# Write result #
################
[
_val_ce_summary, _val_fer_summary, _val_skip_cnt_summary,
_val_img_summary
] = sess.run(
[
val_ce_summary, val_fer_summary, val_skip_cnt_summary,
val_image_summary
],
feed_dict={
val_ce: avg_val_ce,
val_fer: avg_val_fer,
val_skip_cnt: avg_val_skip,
val_image: result_image
})
summary_writer.add_summary(_val_skip_cnt_summary,
global_step.eval())
summary_writer.add_summary(_val_img_summary, global_step.eval())
summary_writer.add_summary(_val_ce_summary, global_step.eval())
summary_writer.add_summary(_val_fer_summary, global_step.eval())
insert_item2dict(eval_summary, 'val_ce', avg_val_ce)
insert_item2dict(eval_summary, 'val_fer', avg_val_fer)
# insert_item2dict(eval_summary, 'val_rl', avg_val_rl)
# insert_item2dict(eval_summary, 'val_reward', avg_val_reward)
# insert_item2dict(eval_summary, 'val_ent', avg_val_ent)
insert_item2dict(eval_summary, 'time', eval_sw.elapsed())
save_npz2(file_name, eval_summary)
# Save best model
if avg_val_ce < _best_ce:
_best_ce = avg_val_ce
best_ckpt = best_save_op.save(sess=sess,
save_path=os.path.join(
args.log_dir,
"best_model(ce).ckpt"),
global_step=global_step)
print("Best checkpoint based on CE stored in: %s" % best_ckpt)
if avg_val_fer < _best_fer:
_best_fer = avg_val_fer
best_ckpt = best_save_op.save(sess=sess,
save_path=os.path.join(
args.log_dir,
"best_model(fer).ckpt"),
global_step=global_step)
print("Best checkpoint based on FER stored in: %s" % best_ckpt)
# Save model
ckpt = save_op.save(sess=sess,
save_path=os.path.join(args.log_dir,
"model.ckpt"),
global_step=global_step)
print("Checkpoint stored in: %s" % ckpt)
# Write result
[_best_val_ce_summary, _best_val_fer_summary
] = sess.run([best_val_ce_summary, best_val_fer_summary],
feed_dict={
best_val_ce: _best_ce,
best_val_fer: _best_fer
})
summary_writer.add_summary(_best_val_ce_summary,
global_step.eval())
summary_writer.add_summary(_best_val_fer_summary,
global_step.eval())
# Done of training
summary_writer.close()
print("Optimization Finished.")
print('Building trainer')
training_fn, trainer_params = trainer_tbptt(
input_data=input_data,
input_mask=input_mask,
target_data=target_data,
target_mask=target_mask,
network=network,
updater=adam,
learning_rate=args.learn_rate,
tbptt_layers=tbptt_layers,
is_first_win=is_first_win,
delay=args.delay,
context=args.num_tbptt_steps,
load_updater_params=pretrain_update_params_val,
ivector_data=ivector_data)
sw.print_elapsed()
sw.reset()
print('Building predictor')
predict_fn = predictor_tbptt(
input_data=input_data,
input_mask=input_mask,
target_data=target_data,
target_mask=target_mask,
network=network,
tbptt_layers=tbptt_layers,
is_first_win=is_first_win,
delay=args.delay,
context=args.num_tbptt_steps,
ivector_data=ivector_data)
sw.print_elapsed()
def main(_):
print(' '.join(sys.argv))
args = FLAGS
print(args.__flags)
print('Hostname: {}'.format(socket.gethostname()))
print('GPU: {}'.format(get_gpuname()))
if not args.start_from_ckpt:
if tf.gfile.Exists(args.log_dir):
tf.gfile.DeleteRecursively(args.log_dir)
tf.gfile.MakeDirs(args.log_dir)
tf.get_variable_scope()._reuse = None
_seed = args.base_seed + args.add_seed
tf.set_random_seed(_seed)
np.random.seed(_seed)
prefix_name = os.path.join(args.log_dir, 'model')
file_name = '%s.npz' % prefix_name
eval_summary = OrderedDict()
tg, test_graph = build_graph(args)
tg_ml_cost = tf.reduce_mean(tg.ml_cost)
global_step = tf.Variable(0, trainable=False, name="global_step")
tvars = tf.trainable_variables()
print([tvar.name for tvar in tvars])
ml_tvars = [tvar for tvar in tvars if "action_logit" not in tvar.name]
rl_tvars = [tvar for tvar in tvars if "action_logit" in tvar.name]
ml_opt_func = tf.train.AdamOptimizer(learning_rate=args.learning_rate,
beta1=0.9,
beta2=0.99)
rl_opt_func = tf.train.AdamOptimizer(learning_rate=args.rl_learning_rate,
beta1=0.9,
beta2=0.99)
if args.grad_clip:
ml_grads, _ = tf.clip_by_global_norm(tf.gradients(
tg_ml_cost, ml_tvars),
clip_norm=1.0)
else:
ml_grads = tf.gradients(tg_ml_cost, ml_tvars)
ml_op = ml_opt_func.apply_gradients(zip(ml_grads, ml_tvars),
global_step=global_step)
tg_rl_cost = tf.reduce_mean(tg.rl_cost)
rl_grads = tf.gradients(tg_rl_cost, rl_tvars)
rl_op = rl_opt_func.apply_gradients(zip(rl_grads, rl_tvars))
tf.add_to_collection('fast_action', args.fast_action)
tf.add_to_collection('fast_action', args.n_fast_action)
sync_data(args)
datasets = [args.train_dataset, args.valid_dataset, args.test_dataset]
train_set, valid_set, test_set = [
create_ivector_datastream(path=args.data_path,
which_set=dataset,
batch_size=args.n_batch,
min_after_cache=args.min_after_cache,
length_sort=not args.no_length_sort)
for dataset in datasets
]
init_op = tf.global_variables_initializer()
save_op = tf.train.Saver(max_to_keep=5)
best_save_op = tf.train.Saver(max_to_keep=5)
with tf.name_scope("per_step_eval"):
tr_ce = tf.placeholder(tf.float32)
tr_ce_summary = tf.summary.scalar("tr_ce", tr_ce)
tr_fer = tf.placeholder(tf.float32)
tr_fer_summary = tf.summary.scalar("tr_fer", tr_fer)
tr_ce2 = tf.placeholder(tf.float32)
tr_ce2_summary = tf.summary.scalar("tr_rl", tr_ce2)
tr_image = tf.placeholder(tf.float32)
tr_image_summary = tf.summary.image("tr_image", tr_image)
with tf.name_scope("per_epoch_eval"):
val_fer = tf.placeholder(tf.float32)
val_fer_summary = tf.summary.scalar("val_fer", val_fer)
best_val_fer = tf.placeholder(tf.float32)
best_val_fer_summary = tf.summary.scalar("best_valid_fer",
best_val_fer)
val_image = tf.placeholder(tf.float32)
val_image_summary = tf.summary.image("val_image", val_image)
vf = LinearVF()
with tf.Session() as sess:
sess.run(init_op)
if args.start_from_ckpt:
save_op = tf.train.import_meta_graph(
os.path.join(args.log_dir, 'model.ckpt.meta'))
save_op.restore(sess, os.path.join(args.log_dir, 'model.ckpt'))
print(
"Restore from the last checkpoint. Restarting from %d step." %
global_step.eval())
summary_writer = tf.summary.FileWriter(args.log_dir,
sess.graph,
flush_secs=5.0)
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0
tr_acc_count = 0
tr_ce2_sum = 0.
tr_ce2_count = 0
_best_score = np.iinfo(np.int32).max
epoch_sw = StopWatch()
disp_sw = StopWatch()
eval_sw = StopWatch()
per_sw = StopWatch()
# For each epoch
for _epoch in xrange(args.n_epoch):
_n_exp = 0
epoch_sw.reset()
disp_sw.reset()
print('Epoch {} training'.format(_epoch + 1))
# For each batch
for batch in train_set.get_epoch_iterator():
x, x_mask, _, _, y, _ = batch
n_batch = x.shape[0]
_n_exp += n_batch
if args.no_sampling:
new_x, new_y, actions, actions_1hot, new_x_mask = gen_supervision(
x, x_mask, y, args)
zero_state = gen_zero_state(n_batch, args.n_hidden)
feed_dict = {
tg.seq_x_data: new_x,
tg.seq_x_mask: new_x_mask,
tg.seq_y_data: new_y,
tg.seq_jump_data: actions
}
feed_init_state(feed_dict, tg.init_state, zero_state)
_tr_ml_cost, _tr_rl_cost, _, _ = \
sess.run([tg.ml_cost, tg.rl_cost, ml_op, rl_op], feed_dict=feed_dict)
tr_ce_sum += _tr_ml_cost.sum()
tr_ce_count += new_x_mask.sum()
tr_ce2_sum += _tr_rl_cost.sum()
tr_ce2_count += new_x_mask[:, :-1].sum()
actions_1hot, label_probs, new_mask, output_image = \
skip_rnn_forward_supervised(x, x_mask, sess, test_graph,
args.fast_action, args.n_fast_action, y)
pred_idx = expand_output(actions_1hot, x_mask, new_mask,
label_probs.argmax(axis=-1))
tr_acc_sum += ((pred_idx == y) * x_mask).sum()
tr_acc_count += x_mask.sum()
_tr_ce_summary, _tr_fer_summary, _tr_ce2_summary, _tr_image_summary = \
sess.run([tr_ce_summary, tr_fer_summary, tr_ce2_summary, tr_image_summary],
feed_dict={tr_ce: _tr_ml_cost.sum() / new_x_mask.sum(),
tr_fer: 1 - ((pred_idx == y) * x_mask).sum() / x_mask.sum(),
tr_ce2: _tr_rl_cost.sum() / new_x_mask[:,:-1].sum(),
tr_image: output_image})
summary_writer.add_summary(_tr_ce_summary,
global_step.eval())
summary_writer.add_summary(_tr_fer_summary,
global_step.eval())
summary_writer.add_summary(_tr_ce2_summary,
global_step.eval())
summary_writer.add_summary(_tr_image_summary,
global_step.eval())
else:
# train jump prediction part
new_x, _, actions, _, new_x_mask = gen_supervision(
x, x_mask, y, args)
zero_state = gen_zero_state(n_batch, args.n_hidden)
feed_dict = {
tg.seq_x_data: new_x,
tg.seq_x_mask: new_x_mask,
tg.seq_jump_data: actions
}
feed_init_state(feed_dict, tg.init_state, zero_state)
_tr_rl_cost, _ = sess.run([tg.rl_cost, rl_op],
feed_dict=feed_dict)
tr_ce2_sum += _tr_rl_cost.sum()
tr_ce2_count += new_x_mask[:, :-1].sum()
_tr_ce2_summary, = sess.run([tr_ce2_summary],
feed_dict={
tr_ce2:
_tr_rl_cost.sum() /
new_x_mask[:, :-1].sum()
})
# generate jumps from the model
new_x, new_y, actions_1hot, label_probs, new_x_mask, output_image = gen_episode_supervised(
x, y, x_mask, sess, test_graph, args.fast_action,
args.n_fast_action)
feed_dict = {
tg.seq_x_data: new_x,
tg.seq_x_mask: new_x_mask,
tg.seq_y_data: new_y
}
feed_init_state(feed_dict, tg.init_state, zero_state)
# train label prediction part
_tr_ml_cost, _ = sess.run([tg.ml_cost, ml_op],
feed_dict=feed_dict)
tr_ce_sum += _tr_ml_cost.sum()
tr_ce_count += new_x_mask.sum()
actions_1hot, label_probs, new_mask, output_image = \
skip_rnn_forward_supervised(x, x_mask, sess, test_graph,
args.fast_action, args.n_fast_action, y)
pred_idx = expand_output(actions_1hot, x_mask, new_mask,
label_probs.argmax(axis=-1))
tr_acc_sum += ((pred_idx == y) * x_mask).sum()
tr_acc_count += x_mask.sum()
_tr_ce_summary, _tr_fer_summary, _tr_image_summary = \
sess.run([tr_ce_summary, tr_fer_summary, tr_image_summary],
feed_dict={tr_ce: _tr_ml_cost.sum() / new_x_mask.sum(),
tr_fer: 1 - ((pred_idx == y) * x_mask).sum() / x_mask.sum(),
tr_image: output_image})
summary_writer.add_summary(_tr_ce_summary,
global_step.eval())
summary_writer.add_summary(_tr_fer_summary,
global_step.eval())
summary_writer.add_summary(_tr_ce2_summary,
global_step.eval())
summary_writer.add_summary(_tr_image_summary,
global_step.eval())
if global_step.eval() % args.display_freq == 0:
avg_tr_ce = tr_ce_sum / tr_ce_count
avg_tr_fer = 1. - tr_acc_sum / tr_acc_count
avg_tr_ce2 = tr_ce2_sum / tr_ce2_count
print(
"TRAIN: epoch={} iter={} ml_cost(ce/frame)={:.2f} fer={:.2f} rl_cost={:.4f} time_taken={:.2f}"
.format(_epoch, global_step.eval(), avg_tr_ce,
avg_tr_fer, avg_tr_ce2, disp_sw.elapsed()))
tr_ce_sum = 0.
tr_ce_count = 0
tr_acc_sum = 0.
tr_acc_count = 0
tr_ce2_sum = 0.
tr_ce2_count = 0
disp_sw.reset()
print('--')
print('End of epoch {}'.format(_epoch + 1))
epoch_sw.print_elapsed()
print('Testing')
# Evaluate the model on the validation set
val_acc_sum = 0
val_acc_count = 0
eval_sw.reset()
for batch in valid_set.get_epoch_iterator():
x, x_mask, _, _, y, _ = batch
n_batch = x.shape[0]
actions_1hot, label_probs, new_mask, output_image = \
skip_rnn_forward_supervised(x, x_mask, sess, test_graph,
args.fast_action, args.n_fast_action, y)
pred_idx = expand_output(actions_1hot, x_mask, new_mask,
label_probs.argmax(axis=-1))
val_acc_sum += ((pred_idx == y) * x_mask).sum()
val_acc_count += x_mask.sum()
avg_val_fer = 1. - val_acc_sum / val_acc_count
print("VALID: epoch={} fer={:.2f} time_taken={:.2f}".format(
_epoch, avg_val_fer, eval_sw.elapsed()))
_val_fer_summary, _val_image_summary = sess.run(
[val_fer_summary, val_image_summary],
feed_dict={
val_fer: avg_val_fer,
val_image: output_image
})
summary_writer.add_summary(_val_fer_summary, global_step.eval())
summary_writer.add_summary(_val_image_summary, global_step.eval())
insert_item2dict(eval_summary, 'val_fer', avg_val_fer)
insert_item2dict(eval_summary, 'time', eval_sw.elapsed())
save_npz2(file_name, eval_summary)
# Save model
if avg_val_fer < _best_score:
_best_score = avg_val_fer
best_ckpt = best_save_op.save(sess,
os.path.join(
args.log_dir,
"best_model.ckpt"),
global_step=global_step)
print("Best checkpoint stored in: %s" % best_ckpt)
ckpt = save_op.save(sess,
os.path.join(args.log_dir, "model.ckpt"),
global_step=global_step)
print("Checkpoint stored in: %s" % ckpt)
_best_val_fer_summary, = sess.run(
[best_val_fer_summary], feed_dict={best_val_fer: _best_score})
summary_writer.add_summary(_best_val_fer_summary,
global_step.eval())
summary_writer.close()
print("Optimization Finished.")
