def exp(dir_prefix, tf_log_dir="ckpt", our_log_dir="logging", replay_cache_dir="ReplayBufferCache",
gpu_mem_fraction=0.15, save_checkpoint_secs=3600):
n_skip = 6
n_stack = 3
if_random_phase = True
# === Agent
# --- agent basic
ALL_ACTIONS = [(ord(mode),) for mode in ['s', 'd', 'a']] + [(0,)]
AGENT_ACTIONS = ALL_ACTIONS[:3]
num_actions = len(AGENT_ACTIONS)
noop = 3
gamma = 0.9
ckpt_step = 0
greedy_epsilon = CappedLinear(int(3e4)-ckpt_step, 0.2-(0.15/3e4*ckpt_step), 0.05)
start_step = ckpt_step*6
# --- replay buffer
replay_bucket_size = 100
replay_max_sample_epoch = 2
# --- NN architecture
f_net = lambda inputs: f_dueling_q(inputs, num_actions)
if_ddqn = True
# --- optimization
batch_size = 8
learning_rate = 1e-4
target_sync_interval = 1
target_sync_rate = 1e-3
update_interval = 1
max_grad_norm = 1.0
sample_mimimum_count = 100
update_ratio = 8.0
# --- logging and ckpt
replay_capacity = 300
replay_ratio_active = 1.0
# === Reward function
class FuncReward(object):
def __init__(self, gamma):
self.__gamma = gamma
self._ema_speed = 10.0
self._ema_dist = 0.0
self._obs_risk = 0.0
self._road_change = False
self._mom_opp = 0.0
self._mom_biking = 0.0
self._steering = False
self._waiting_steps = 0
def reset(self):
self._ema_speed = 10.0
self._ema_dist = 0.0
self._obs_risk = 0.0
self._road_change = False
self._mom_opp = 0.0
self._mom_biking = 0.0
self._steering = False
def _func_scalar_reward(self, rewards, action):
"""Coverts a vector reward into a scalar."""
info = {}
# append a reward that is 1 when action is lane switching
rewards = rewards.tolist()
print (' '*3 + 'R: [' + '{:4.2f} ' * len(rewards) + ']').format(
*rewards),
# extract relevant rewards.
speed = rewards[0]
dist = rewards[1]
obs_risk = rewards[2]
# road_invalid = rewards[3] > 0.01 # any yellow or red
road_change = rewards[4] > 0.01 # entering intersection
opp = rewards[5]
biking = rewards[6]
# inner = rewards[7]
# outter = rewards[8]
steer = np.logical_or(action == 1, action == 2)
if speed < 0.1:
self._waiting_steps += 1
else:
self._waiting_steps = 0
# update reward-related state vars
ema_speed = 0.5 * self._ema_speed + 0.5 * speed
ema_dist = 1.0 if dist > 2.0 else 0.9 * self._ema_dist
mom_opp = min((opp < 0.5) * (self._mom_opp + 1), 20)
mom_biking = min((biking > 0.5) * (self._mom_biking + 1), 12)
steering = steer if action != 3 else self._steering
self._ema_speed = ema_speed
self._ema_dist = ema_dist
self._obs_risk = obs_risk
self._road_change = road_change
self._mom_opp = mom_opp
self._mom_biking = mom_biking
self._steering = steering
print '{:3.0f}, {:3.0f}, {:4.2f}, {:3.0f}'.format(
mom_opp, mom_biking, ema_dist, self._steering),
info['reward_fun/speed'] = speed
info['reward_fun/dist2longest'] = dist
info['reward_fun/obs_risk'] = obs_risk
info['reward_fun/road_change'] = road_change
info['reward_fun/on_opposite'] = opp
info['reward_fun/on_biking'] = biking
info['reward_fun/steer'] = steer
info['reward_fun/mom_opposite'] = mom_opp
info['reward_fun/mom_biking'] = mom_biking
info['waiting_steps'] = self._waiting_steps
# calculate scalar reward
reward = [
# velocity
speed * 10 - 10,
# obs factor
-100.0 * obs_risk,
# opposite
-20 * (0.9 + 0.1 * mom_opp) * (mom_opp > 1.0),
# ped
-40 * (0.9 + 0.1 * mom_biking) * (mom_biking > 1.0),
# steer
steering * -40.0,
# distance to longest
-20.0 * (dist > 3.75/2)
]
reward = np.sum(reward) / 100.0
print ': {:5.2f}'.format(reward)
return reward, info
def _func_early_stopping(self):
"""Several early stopping criterion."""
info = {}
done = False
# switched lane while going into intersection.
if self._road_change and self._ema_dist > 0.2:
print "[Episode early stopping] turned into intersection."
done = True
info['banned_road_change'] = True
# used biking lane to cross intersection
if self._road_change and self._mom_biking > 0:
print "[Episode early stopping] entered intersection on biking lane."
done = True
info['banned_road_change'] = True
# hit obstacle
if self._obs_risk > 1.0:
print "[Episode early stopping] hit obstacle."
done = True
# waiting too long
if self._waiting_steps > 80:
print "[Episode early stopping] waiting too long"
done = True
return done, info
def _func_skipping_bias(self, reward, done, info, n_skip, cnt_skip):
new_info = {}
if 'banned_road_change' in info:
reward -= 1.0 * (n_skip - cnt_skip)
if done:
pass
new_info['reward_fun/reward'] = reward
return reward, new_info
def __call__(self, action, rewards, done, n_skip=1, cnt_skip=0):
info = {}
reward, info_diff = self._func_scalar_reward(rewards, action)
info.update(info_diff)
early_done, info_diff = self._func_early_stopping()
done = done | early_done
info.update(info_diff)
reward, info_diff = self._func_skipping_bias(
reward, done, info, n_skip, cnt_skip)
info.update(info_diff)
if done:
info['flag_success'] = reward > 0.0
self.reset()
return reward, done, info
# ==========================================
# ==========================================
# ==========================================
env, replay_buffer, _agent = None, None, None
try:
# Parse flags
# FLAGS = tf.app.flags.FLAGS
tf_log_dir = os.sep.join([dir_prefix, tf_log_dir])
our_log_dir = os.sep.join([dir_prefix, our_log_dir])
replay_cache_dir = os.sep.join([dir_prefix, replay_cache_dir])
# Modify tf graph
graph = tf.get_default_graph()
# -- create learning rate var and optimizer
lr = tf.get_variable(
'learning_rate', [], dtype=tf.float32,
initializer=tf.constant_initializer(1e-3), trainable=False
)
lr_in = tf.placeholder(dtype=tf.float32)
op_set_lr = tf.assign(lr, lr_in)
optimizer_td = tf.train.AdamOptimizer(learning_rate=lr)
# -- create global step variable
global_step = tf.get_variable(
'global_step', [], dtype=tf.int32,
initializer=tf.constant_initializer(0), trainable=False)
def gen_default_backend_cmds():
ws_path = '/Projects/catkin_ws/'
initialD_path = '/Projects/hobotrl/playground/initialD/'
backend_path = initialD_path + 'ros_environments/backend_scripts/'
utils_path = initialD_path + 'ros_environments/backend_scripts/utils/'
backend_cmds = [
['python', utils_path + '/iterate_test_case.py'],
# Parse maps
['python', utils_path + 'parse_map.py',
ws_path + 'src/Map/src/map_api/data/honda_wider.xodr',
utils_path + 'road_segment_info.txt'],
# Start roscore
['roscore'],
# Reward function script
['python', backend_path + 'gazebo_rl_reward.py'],
# Road validity node script
['python', backend_path + 'road_validity.py',
utils_path + 'road_segment_info.txt.signal'],
# Simulation restarter backend
['python', backend_path+'rviz_restart.py', 'next.launch'],
]
return backend_cmds
# Environment
env = FrameStack(DrSimDecisionK8S(backend_cmds=gen_default_backend_cmds()), n_stack)
# Agent
replay_buffer = BigPlayback(
bucket_cls=MapPlayback,
cache_path=replay_cache_dir,
capacity=replay_capacity,
bucket_size=replay_bucket_size,
ratio_active=replay_ratio_active,
max_sample_epoch=replay_max_sample_epoch,
)
state_shape = env.observation_space.shape
__agent = DQN(
f_create_q=f_net, state_shape=state_shape,
# OneStepTD arguments
num_actions=num_actions, discount_factor=gamma, ddqn=if_ddqn,
# target network sync arguments
target_sync_interval=target_sync_interval,
target_sync_rate=target_sync_rate,
# epsilon greedy arguments
greedy_epsilon=greedy_epsilon,
# optimizer arguments
network_optimizer=LocalOptimizer(optimizer_td, max_grad_norm),
# sampler arguments
sampler=TransitionSampler(
replay_buffer,
batch_size=batch_size,
interval=update_interval,
minimum_count=sample_mimimum_count),
# checkpoint
global_step=global_step
)
# Utilities
stepsSaver = StepsSaver(our_log_dir)
reward_vector2scalar = FuncReward(gamma)
# Configure sess
config = tf.ConfigProto()
config.gpu_options.per_process_gpu_memory_fraction = gpu_mem_fraction
with __agent.create_session(
config=config, save_dir=tf_log_dir,
save_checkpoint_secs=save_checkpoint_secs) as sess, \
AsynchronousAgent(
agent=__agent, method='ratio', ratio=update_ratio) as _agent:
agent = SkippingAgent(
# n_skip_vec=(2, 6, 6),
agent=_agent, n_skip=n_skip, specific_act=noop
)
summary_writer = SummaryWriterCache.get(tf_log_dir)
# set vars
sess.run(op_set_lr, feed_dict={lr_in: learning_rate})
print "Using learning rate {}".format(sess.run(lr))
n_ep = 0
n_total_steps = start_step
# GoGoGo
while n_total_steps <= 2.5e5:
cum_reward = 0.0
n_ep_steps = 0
state = env.reset()
while True:
action = agent.act(state, exploration=False)
if action != 3:
print_qvals(
n_ep_steps, __agent, state, action, AGENT_ACTIONS
)
next_state, vec_reward, done, env_info = env.step(action)
reward, done, reward_info = reward_vector2scalar(
action, vec_reward, done, agent.n_skip, agent.cnt_skip
)
agent_info = agent.step(
sess=sess, state=state, action=action,
reward=reward, next_state=next_state,
episode_done=done, learning_off=True
)
env_info.update(reward_info)
summary_proto = log_info(
agent_info, env_info,
done,
cum_reward,
n_ep, n_ep_steps, n_total_steps,
)
summary_writer.add_summary(summary_proto, n_total_steps)
n_total_steps += 1
n_ep_steps += 1
cum_reward += reward
flag_success = reward_info['flag_success'] \
if 'flag_success' in reward_info else False
stepsSaver.save(
n_ep, n_total_steps,
state, action, vec_reward, reward, done,
cum_reward, flag_success
)
state = next_state
if done:
n_ep += 1
logging.warning(
"Episode {} finished in {} steps, reward is {}.".format(
n_ep, n_ep_steps, cum_reward,
)
)
break
if n_ep >= 100:
break
except Exception as e:
print e.message
traceback.print_exc()
finally:
logging.warning("="*30)
logging.warning("="*30)
logging.warning("Tidying up...")
# kill orphaned monitor daemon process
if env is not None:
env.env.exit()
replay_buffer.close()
if replay_buffer is not None:
replay_buffer.close()
if _agent is not None:
_agent.stop()
# os.killpg(os.getpgid(os.getpid()), signal.SIGKILL)
import time
logging.warning("waiting for k8s end")
time.sleep(180)
logging.warning("="*30)
# GoGoGo
while n_total_steps <= 2.5e5:
cum_reward = 0.0
n_ep_steps = 0
state = env.reset()
while True:
action = agent.act(state)
if action != 3:
print_qvals(n_ep_steps, __agent, state, action,
AGENT_ACTIONS)
next_state, vec_reward, done, env_info = env.step(action)
reward, done, reward_info = reward_vector2scalar(
action, vec_reward, done, agent.n_skip, agent.cnt_skip)
agent_info = agent.step(sess=sess,
state=state,
action=action,
reward=reward,
next_state=next_state,
episode_done=done)
env_info.update(reward_info)
summary_proto = log_info(
agent_info,
env_info,
done,
cum_reward,
n_ep,
n_ep_steps,
n_total_steps,
)
summary_writer.add_summary(summary_proto, n_total_steps)
n_total_steps += 1
n_ep_steps += 1
for _ in range(100):
cum_reward = 0.0
n_ep_steps = 0
state = env.reset()
while True:
action = agent.act(state, exploration=not tf.test)
if action != 3:
print_qvals(n_ep_steps, __agent, state, action,
AGENT_ACTIONS)
next_state, vec_reward, done, env_info = env.step(action)
reward, done, reward_info = reward_vector2scalar(
action, vec_reward, done, agent.n_skip, agent.cnt_skip)
agent_info = agent.step(sess=sess,
state=state,
action=action,
reward=reward,
next_state=next_state,
episode_done=done,
learning_off=FLAGS.test)
env_info.update(reward_info)
summary_proto = log_info(
agent_info,
env_info,
done,
cum_reward,
n_ep,
n_ep_steps,
n_total_steps,
)
summary_writer.add_summary(summary_proto, n_total_steps)
n_total_steps += 1