class Learner:
def __init__(self, learner_id, config, dev, shared_state, shared_queue):
self.action_size = config['action_space']
self.obs_size = config['obs_space']
self.shared_queue = shared_queue
self.shared_state = shared_state
self.dev = dev
self.id = learner_id
self.burn_in_length = config['burn_in_length'] # 40-80
self.learning_length = config['learning_length']
self.sequence_length = self.burn_in_length + self.learning_length
self.n_step = config['n_step']
self.sequence = []
self.recurrent_state = []
self.priority = []
self.td_loss = deque(maxlen=self.learning_length)
self.gamma = config['gamma']
# self.actor_parameter_update_interval = config['actor_parameter_update_interval']
self.actor = ActorNet(dev, config).to(self.dev)
self.target_actor = ActorNet(dev, config).to(self.dev)
self.critic = CriticNet(dev, config).to(self.dev)
self.target_critic = CriticNet(dev, config).to(self.dev)
self.actor.load_state_dict(self.shared_state["actor"].state_dict())
self.target_actor.load_state_dict(
self.shared_state["target_actor"].state_dict())
self.critic.load_state_dict(self.shared_state["critic"].state_dict())
self.target_critic.load_state_dict(
self.shared_state["target_critic"].state_dict())
# self.actor.load_state_dict(self.shared_state["actor"])
# self.target_actor.load_state_dict(self.shared_state["target_actor"])
# self.critic.load_state_dict(self.shared_state["critic"])
# self.target_critic.load_state_dict(self.shared_state["target_critic"])
self.learner_actor_rate = config['learner_actor_rate']
self.num_actors = learner_id
self.n_actions = 1
self.max_frame = config['learner_max_frame']
self.memory_sequence_size = config['memory_sequence_size']
self.batch_size = config['batch_size']
self.memory = LearnerReplayMemory(self.memory_sequence_size, config,
dev)
self.model_path = './'
# self.memory_path = './memory_data/'
# self.model_save_interval = 10 # 50
self.learner_parameter_update_interval = config[
'learner_parameter_update_interval'] # 50
self.target_update_inverval = config['target_update_interval'] # 100
self.gamma = config['gamma']
self.actor_lr = config['actor_lr']
self.critic_lr = config['critic_lr']
self.actor_optimizer = optim.Adam(self.actor.parameters(),
lr=self.actor_lr)
self.actor_criterion = nn.MSELoss()
self.critic_optimizer = optim.Adam(self.critic.parameters(),
lr=self.critic_lr)
self.critic_criterion = nn.MSELoss()
def __del__(self):
self.shared_queue.close()
self.shared_state.close()
# self.save_model()
def save_model(self):
model_dict = {
'actor': self.actor.state_dict(),
'target_actor': self.target_actor.state_dict(),
'critic': self.critic.state_dict(),
'target_critic': self.target_critic.state_dict()
}
torch.save(model_dict, self.model_path + 'model.pt')
def update_target_model(self):
self.target_actor.load_state_dict(self.actor.state_dict())
self.target_critic.load_state_dict(self.critic.state_dict())
def run(self):
time_check(-1)
while self.memory.size() < self.batch_size:
self.memory.append(self.shared_queue.get(block=True))
# self.memory.append(self.shared_queue.get())
print('\rmem size: ', self.memory.size(), end='\r')
time_check(1)
count_mem = 0
frame = 0
win_v = vis.line(Y=torch.Tensor([0]), opts=dict(title='V_loss'))
win_p = vis.line(Y=torch.Tensor([0]), opts=dict(title='P_loss'))
while frame < self.max_frame:
# sleep(0.0001)
# if self.shared_queue.qsize()==0 and count_mem <0:
# self.memory.append(self.shared_queue.get(block=True))
#
# for i in range(self.shared_queue.qsize()):
# self.memory.append(self.shared_queue.get(block=False))
# count_mem += self.learner_actor_rate
# print('waiting shared q {}/{}'.format(self.memory.size(),self.batch_size))
# self.shared_state['frame'][self.id]=frame
# while self.shared_state['sleep'][self.id] :
# sleep(0.5)
# if self.shared_queue.qsize()==0 and count_mem <0:
# self.memory.append(self.shared_queue.get(block=True))
# self.memory.append(self.shared_queue.get())
# for i in range(self.shared_queue.qsize()):
## global_buf.append(self.shared_queue.get())
# self.memory.append(self.shared_queue.get())
# count_mem += self.learner_actor_rate
if self.shared_queue.qsize() != 0:
self.memory.append(self.shared_queue.get(block=True))
frame += 1
count_mem -= 1
episode_index, sequence_index, obs_seq, action_seq, reward_seq, gamma_seq, a_state, ta_state, c_state, tc_state = self.memory.sample(
)
self.actor.set_state(a_state[0], a_state[1])
self.target_actor.set_state(ta_state[0], ta_state[1])
self.critic.set_state(c_state[0], c_state[1])
self.target_critic.set_state(tc_state[0], tc_state[1])
### burn-in step ###
_ = [self.actor(obs_seq[i]) for i in range(self.burn_in_length)]
_ = [
self.critic(obs_seq[i], action_seq[i])
for i in range(self.burn_in_length)
]
_ = [
self.target_actor(obs_seq[i])
for i in range(self.burn_in_length + self.n_step)
]
_ = [
self.target_critic(obs_seq[i], action_seq[i])
for i in range(self.burn_in_length + self.n_step)
]
### learning steps ###
# update ciritic
q_value = torch.zeros(self.learning_length * self.batch_size,
self.n_actions)
target_q_value = torch.zeros(
self.learning_length * self.batch_size, self.n_actions)
for i in range(self.learning_length):
obs_i = self.burn_in_length + i
next_obs_i = self.burn_in_length + i + self.n_step
q_value[i * self.batch_size:(i + 1) *
self.batch_size] = self.critic(obs_seq[obs_i],
action_seq[obs_i])
with torch.no_grad():
next_q_value = self.target_critic(
obs_seq[next_obs_i],
self.target_actor(obs_seq[next_obs_i]))
target_q_val = reward_seq[obs_i] + (
gamma_seq[next_obs_i]**self.n_step) * next_q_value
# target_q_val = invertical_vf(target_q_val)
target_q_value[i * self.batch_size:(i + 1) *
self.batch_size] = target_q_val
critic_loss = self.actor_criterion(q_value,
target_q_value.detach())
self.critic_optimizer.zero_grad()
critic_loss.backward()
self.critic_optimizer.step()
# update actor
self.actor.reset_state()
self.critic.reset_state()
actor_loss = torch.zeros(self.learning_length * self.batch_size,
self.n_actions).to(self.dev)
for i in range(self.learning_length):
obs_i = i + self.burn_in_length
action = self.actor(obs_seq[obs_i])
actor_loss[i * self.batch_size:(i + 1) *
self.batch_size] = -self.critic(
obs_seq[obs_i], self.actor(obs_seq[obs_i]))
actor_loss = actor_loss.mean()
self.actor_optimizer.zero_grad()
actor_loss.backward()
self.actor_optimizer.step()
# update target networks
if frame % self.target_update_inverval == 0:
self.update_target_model()
print('#', frame, 'critic_loss:', critic_loss.item(),
' actor_loss:', actor_loss.item(), ' count:', count_mem)
win_p = vis.line(X=torch.Tensor([frame]),
Y=torch.Tensor([actor_loss.item()]),
win=win_p,
update='append')
win_v = vis.line(X=torch.Tensor([frame]),
Y=torch.Tensor([critic_loss.item()]),
win=win_v,
update='append')
# calc priority
average_td_loss = ((q_value - target_q_value)**2).detach().to(
self.dev)
# average_td_loss = np.mean(((q_value - target_q_value)**2).detach().cpu().numpy() , axis = 1)
for i in range(len(episode_index)):
td = average_td_loss[i:-1:self.batch_size]
self.memory.priority[episode_index[i]][
sequence_index[i]] = calc_priority(td).cpu().view(1, -1)
self.memory.total_priority[episode_index[i]] = torch.cat(
self.memory.priority[episode_index[i]]).sum(0).view(1, -1)
# self.memory.priority[episode_index[i]][sequence_index[i]] = calc_priority(td)
# self.memory.total_priority[episode_index[i]] = sum(self.memory.priority[episode_index[i]])
# if frame % self.model_save_interval == 0:
# self.save_model()
if frame % self.learner_parameter_update_interval == 0:
# print('learner update ')
# [self.shared_state["actor"][k] = v.cpu() for k,v in self.actor.state_dict().item() ]
# [self.shared_state["target_actor"][k] = v.cpu() for k,v in self.target_actor.state_dict().item() ]
# [self.shared_state["critic"][k] = v.cpu() for k,v in self.critic.state_dict().item() ]
# [self.shared_state["target_critic"][k] = v.cpu() for k,v in self.target_critic.state_dict().item() ]
#
# for k,v in self.actor.state_dict().items():
# self.shared_state["actor"][k] = v.cpu()
# for k,v in self.target_actor.state_dict().items():
# self.shared_state["target_actor"][k] = v.cpu()
# for k,v in self.critic.state_dict().items():
# self.shared_state["critic"][k] = v.cpu()
# for k,v in self.target_critic.state_dict().items():
# self.shared_state["target_critic"][k] = v.cpu()
# self.shared_state["actor"] = self.actor.state_dict()
# self.shared_state["target_actor"] = self.target_actor.state_dict()
# self.shared_state["critic"] = self.critic.state_dict()
# self.shared_state["target_critic"] = self.target_critic.state_dict()
self.shared_state["actor"].load_state_dict(
self.actor.state_dict())
self.shared_state["critic"].load_state_dict(
self.critic.state_dict())
self.shared_state["target_actor"].load_state_dict(
self.target_actor.state_dict())
self.shared_state["target_critic"].load_state_dict(
self.target_critic.state_dict())
for i in range(self.num_actors):
self.shared_state["update"][i] = True
print('learner_update', self.actor.policy_l0.weight.data[0][0])
self.actor.reset_state()
self.target_actor.reset_state()
self.critic.reset_state()
self.target_critic.reset_state()
class Learner:
def __init__(self, n_actors):
self.env = suite.load(domain_name="walker", task_name="run")
self.n_actions = self.env.action_spec().shape[0]
self.obs_size = get_obs(self.env.reset().observation).shape[1]
self.n_actors = n_actors
self.burn_in_length = 20 # 40-80
self.learning_length = 40
self.sequence_length = self.burn_in_length + self.learning_length
self.n_step = 5
self.memory_sequence_size = 5000000
self.batch_size = 32
self.memory = LearnerReplayMemory(
memory_sequence_size=self.memory_sequence_size,
batch_size=self.batch_size)
self.model_path = './model_data/'
self.memory_path = './memory_data/'
self.actor = ActorNet(self.obs_size, self.n_actions, 0).cuda()
self.target_actor = deepcopy(self.actor).eval()
self.critic = CriticNet(self.obs_size, self.n_actions, 0).cuda()
self.target_critic = deepcopy(self.critic).eval()
self.model_save_interval = 50 # 50
self.memory_update_interval = 50 # 50
self.target_update_inverval = 500 # 100
self.gamma = 0.997
self.actor_lr = 1e-4
self.critic_lr = 1e-3
self.actor_optimizer = optim.Adam(self.actor.parameters(),
lr=self.actor_lr)
self.actor_criterion = nn.MSELoss()
self.critic_optimizer = optim.Adam(self.critic.parameters(),
lr=self.critic_lr)
self.critic_criterion = nn.MSELoss()
self.save_model()
def save_model(self):
model_dict = {
'actor': self.actor.state_dict(),
'target_actor': self.target_actor.state_dict(),
'critic': self.critic.state_dict(),
'target_critic': self.target_critic.state_dict()
}
torch.save(model_dict, self.model_path + 'model.pt')
def update_target_model(self):
self.target_actor.load_state_dict(self.actor.state_dict())
self.target_critic.load_state_dict(self.critic.state_dict())
def run(self):
# memory not enough
while self.memory.sequence_counter < self.batch_size * 100:
for i in range(self.n_actors):
is_memory = os.path.isfile(self.memory_path +
'/memory{}.pt'.format(i))
if is_memory:
self.memory.load(i)
sleep(0.1)
print('learner memory sequence size:',
self.memory.sequence_counter)
step = 0
while True:
if step % 100 == 0:
print('learning step:', step)
start = time()
step += 1
episode_index, sequence_index, obs_seq, action_seq, reward_seq, terminal_seq, a_state, ta_state, c_state, tc_state = self.memory.sample(
)
self.actor.set_state(a_state[0], a_state[1])
self.target_actor.set_state(ta_state[0], ta_state[1])
self.critic.set_state(c_state[0], c_state[1])
self.target_critic.set_state(tc_state[0], tc_state[1])
### burn-in step ###
_ = [self.actor(obs) for obs in obs_seq[0:self.burn_in_length]]
_ = [
self.critic(obs, action)
for obs, action in zip(obs_seq[0:self.burn_in_length],
action_seq[0:self.burn_in_length])
]
_ = [
self.target_actor(obs)
for obs in obs_seq[0:self.burn_in_length + self.n_step]
]
_ = [
self.target_critic(obs, action) for obs, action in zip(
obs_seq[0:self.burn_in_length +
self.n_step], action_seq[0:self.burn_in_length +
self.n_step])
]
### learning steps ###
# update ciritic
q_value = torch.zeros(self.learning_length * self.batch_size,
self.n_actions).cuda()
target_q_value = torch.zeros(
self.learning_length * self.batch_size, self.n_actions).cuda()
for i in range(self.learning_length):
obs_i = self.burn_in_length + i
next_obs_i = self.burn_in_length + i + self.n_step
q_value[i * self.batch_size:(i + 1) *
self.batch_size] = self.critic(obs_seq[obs_i],
action_seq[obs_i])
next_q_value = self.target_critic(
obs_seq[next_obs_i],
self.target_actor(obs_seq[next_obs_i]))
target_q_val = reward_seq[obs_i] + (
self.gamma**self.n_step) * (
1. - terminal_seq[next_obs_i - 1]) * next_q_value
target_q_val = invertical_vf(target_q_val)
target_q_value[i * self.batch_size:(i + 1) *
self.batch_size] = target_q_val
critic_loss = self.actor_criterion(q_value,
target_q_value.detach())
self.critic_optimizer.zero_grad()
critic_loss.backward()
self.critic_optimizer.step()
# update actor
self.actor.reset_state()
self.critic.reset_state()
actor_loss = torch.zeros(self.learning_length * self.batch_size,
self.n_actions).cuda()
for i in range(self.learning_length):
obs_i = i + self.burn_in_length
action = self.actor(obs_seq[obs_i])
actor_loss[i * self.batch_size:(i + 1) *
self.batch_size] = -self.critic(
obs_seq[obs_i], self.actor(obs_seq[obs_i]))
actor_loss = actor_loss.mean()
self.actor_optimizer.zero_grad()
actor_loss.backward()
self.actor_optimizer.step()
# update target networks
if step % self.target_update_inverval == 0:
self.update_target_model()
# calc priority
average_td_loss = np.mean(
(q_value - target_q_value).detach().cpu().numpy()**2., axis=1)
for i in range(len(episode_index)):
td = average_td_loss[i:-1:self.batch_size]
self.memory.priority[episode_index[i]][
sequence_index[i]] = calc_priority(td)
self.memory.total_priority[episode_index[i]] = sum(
self.memory.priority[episode_index[i]])
if step % self.model_save_interval == 0:
self.save_model()
if step % self.memory_update_interval == 0:
for i in range(self.n_actors):
is_memory = os.path.isfile(self.memory_path +
'/memory{}.pt'.format(i))
if is_memory:
self.memory.load(i)
sleep(0.1)
self.actor.reset_state()
self.target_actor.reset_state()
self.critic.reset_state()
self.target_critic.reset_state()
class Actor:
def __init__(self, actor_id, config, dev, shared_state, shared_queue, eps):
# self.env = suite.load(domain_name="walker", task_name="run")
# self.action_size = self.env.action_spec().shape[0]
# self.obs_size = get_obs(self.env.reset().observation).shape[1]
self.env = env_cover(config, dev)
self.num_env = config['num_envs']
self.shared_queue = shared_queue
self.shared_state = shared_state
self.dev = dev
self.actor_id = actor_id
self.burn_in_length = config['burn_in_length'] # 40-80
self.learning_length = config['learning_length']
self.sequence_length = self.burn_in_length + self.learning_length
self.n_step = config['n_step']
self.sequence = []
self.recurrent_state = []
self.priority = []
self.td_loss = deque(maxlen=self.learning_length)
# self.memory_sequence_size = 1000
# self.memory = ReplayMemory(memory_sequence_size=self.memory_sequence_size)
# self.memory_save_interval = 3
self.max_frame = config['actor_max_frame']
self.gamma = config['gamma']
# self.actor_parameter_update_interval = config['actor_parameter_update_interval']
self.max_shared_q_size = config['max_shared_q_size']
self.model_path = './'
self.memory_path = './'
self.actor = ActorNet(dev, config).to(self.dev)
self.target_actor = ActorNet(dev, config).to(self.dev)
self.critic = CriticNet(dev, config).to(self.dev)
self.target_critic = CriticNet(dev, config).to(self.dev)
self.actor.load_state_dict(self.shared_state["actor"].state_dict())
self.target_actor.load_state_dict(
self.shared_state["target_actor"].state_dict())
self.critic.load_state_dict(self.shared_state["critic"].state_dict())
self.target_critic.load_state_dict(
self.shared_state["target_critic"].state_dict())
# self.actor.load_state_dict(self.shared_state["actor"])
# self.target_actor.load_state_dict(self.shared_state["target_actor"])
# self.critic.load_state_dict(self.shared_state["critic"])
# self.target_critic.load_state_dict(self.shared_state["target_critic"])
self.action_argmax = config['action_argmax']
# self.load_model()
self.epsilon = eps
def __del__(self):
self.env.close()
def PrePro(self, obs):
return obs
# return torch.from_numpy(obs).detach().float().reshape((1,self.obs_size)).to(self.dev)
def save_memory(self):
model_dict = {
'sequence': self.sequence,
'recurrent_state': self.recurrent_state,
'priority': self.priority,
}
torch.save(model_dict, self.memory_path + 'memory.pt')
# with open('outfile', 'wb') as fp:
# pickle.dump(itemlist, fp)
#
# with open ('outfile', 'rb') as fp:
# itemlist = pickle.load(fp)
def load_model(self):
if os.path.isfile(self.model_path + 'model.pt'):
while True:
try:
# TODO: Delete
# self.actor = ActorNet(self.obs_size, self.action_size, self.actor_id%2+1).cuda().eval()
# self.target_actor = deepcopy(self.actor)
# self.critic = CriticNet(self.obs_size, self.action_size, self.actor_id%2+1).cuda().eval()
# self.target_critic = deepcopy(self.critic)
#model_dict = torch.load(self.model_path + 'model.pt', map_location={'cuda:0':'cuda:{}'.format(self.actor_id%2+1)})
print('waiting model.pt')
model_dict = torch.load(self.model_path + 'model.pt')
self.actor.load_state_dict(model_dict['actor'])
self.target_actor.load_state_dict(
model_dict['target_actor'])
self.critic.load_state_dict(model_dict['critic'])
self.target_critic.load_state_dict(
model_dict['target_critic'])
self.actor.to(self.dev)
self.target_actor.to(self.dev)
self.critic.to(self.dev)
self.target_critic.to(self.dev)
except:
sleep(np.random.rand() * 5 + 2)
else:
break
def calc_nstep_reward(self):
for i in range(len(self.sequence) - self.n_step):
self.sequence[i][2] = sum([
self.sequence[i + j][2] * (self.sequence[i + j][3]**j)
for j in range(self.n_step)
])
def calc_priorities(self):
with torch.no_grad():
self.actor.reset_state()
self.critic.reset_state()
self.target_actor.reset_state()
self.target_critic.reset_state()
# self.td_loss = deque(maxlen=self.learning_length)
self.td_loss = []
self.priority = []
# 이부분은 target 넷을 nstep 만큼 진행 해놓는것.
# for i in range(self.n_step):
# next_obs = self.sequence[i][0]
# next_action = self.target_actor(self.PrePro(next_obs)).to(self.dev)
# next_q_value = self.target_critic(self.PrePro(next_obs), next_action)
# n 스텝 진행 하면서 Q 벨류 예측. seq[시퀀스][0:staet ,1:action ,2:reward,3:term->gamma]
for i in range(len(self.sequence) - self.n_step):
# obs = torch.from_numpy(self.sequence[i][0]).unsqueeze(0)
# obs = self.sequence[i][0]
# # action = self.sequence[i][1].unsqueeze(0)
# next_obs = self.sequence[i + self.n_step][0]
#
# action = self.sequence[i][1]
## action = torch.Tensor(self.sequence[i][1]).view(1,-1).to(self.dev)
# # next_obs = torch.from_numpy(self.sequence[i + self.n_step][0]).unsqueeze(0)
# next_action = self.target_actor(self.PrePro(next_obs)).to(self.dev)
#
# q_value = self.critic(self.PrePro(obs), action)
# q_value = q_value.gather(1,action.view(1,-1))
# reward = self.sequence[i][2]
# gamma = self.sequence[i + self.n_step - 1][3]
# next_q_value = self.target_critic(self.PrePro(next_obs),next_action).max(1)[0]
#
# if i >= self.burn_in_length:
# target_q_value = (reward + (gamma ** self.n_step)) * next_q_value
## target_q_value = invertical_vf(target_q_value)
# self.td_loss.append(((q_value - target_q_value)**2))
# if len(self.td_loss) > self.learning_length:
# self.td_loss.pop(0)
# if i >= self.sequence_length:
# self.priority.append(calc_priority(self.td_loss))
self.priority.append(torch.Tensor([0]))
def run(self):
# sleep(random.random()*1)
frame = 0
# if self.actor_id%3 == 0:
win_r = vis.line(Y=torch.Tensor([0]),
opts=dict(title='reward' + str(self.epsilon)))
reward_sum = 0
while frame < self.max_frame:
# self.shared_state['frame'][self.actor_id]=frame
# while self.shared_state['sleep'][self.actor_id] :
# sleep(0.5)
st, rt, dt = self.env.reset()
self.actor.reset_state()
self.critic.reset_state()
self.target_actor.reset_state()
self.target_critic.reset_state()
self.sequence = []
self.recurrent_state = []
self.priority = []
self.td_loss.clear()
# if self.actor_id%3 == 0:
win_r = vis.line(X=torch.Tensor([frame]),
Y=torch.Tensor([reward_sum]),
win=win_r,
update='append')
qmin = 9999
qmax = -9999
pmin = 9999
pmax = -9999
reward_sum = 0
count_step = 0
sleep(0.01)
while sum(dt) != self.num_env:
frame += 1
# get recurrent state
action = self.actor(self.PrePro(st))
Qv = self.critic(self.PrePro(st), action)
qmax = max(qmax, Qv.max())
qmin = min(qmin, Qv.min())
pmax = max(pmax, action.max())
pmin = min(pmin, action.min())
# noise = torch.normal(mean=torch.zeros([self.num_env,1]),std=torch.ones([self.num_env,1])).to(self.dev)
# action = action.detach().item() + np.random.normal(0, self.epsilon, (self.action_size))
# action = np.clip(action, -1, 1)
action = Qv.argmax().view(1, -1)
if self.epsilon > random.random():
action = torch.LongTensor([random.randint(0,
1)]).view(1, -1)
# m = torch.distributions.MultivariateNormal(torch.zeros([1,1]), torch.eye(1))
# action = action + m.sample().to(self.dev)*self.epsilon
## action = action.clamp(min=0,max=1)
#
# if self.action_argmax:
# act = action.argmax(1).cpu().numpy().item()
# else:
# act = action.cpu().numpy()
# action = (action+noise*self.epsilon).clamp(min=-1,max=1)
st_1, rt, dt = self.env.step(int(action.item()))
reward_sum += rt
count_step += 1
gamma = torch.ones([self.num_env, 1]).to(
self.dev) * self.gamma * (1 - dt)
# gamma = self.gamma if not dt else 0.
self.sequence.append([st, action, rt, gamma])
st = st_1
# self.recurrent_state.append([torch.cat([actor_hx, actor_cx]), torch.cat([target_actor_hx, target_actor_cx]),
# torch.cat([critic_hx, critic_cx]), torch.cat([target_critic_hx, target_critic_cx])])
# if True:
if self.shared_state["update"][self.actor_id]:
self.actor.load_state_dict(
self.shared_state["actor"].state_dict())
self.target_actor.load_state_dict(
self.shared_state["target_actor"].state_dict())
self.critic.load_state_dict(
self.shared_state["critic"].state_dict())
self.target_critic.load_state_dict(
self.shared_state["target_critic"].state_dict())
self.shared_state["update"][self.actor_id] = False
# print('actor_update',self.actor.policy_l0.weight.data[0][0])
# self.load_model()
if len(self.sequence) >= self.sequence_length:
# self.sequence.extend([(st, action, 0., 0.) for i in range(self.n_step)])
# st, rt, dt = self.env.end_dummy()
# self.sequence.extend([[st,action, rt, dt] for i in range(self.n_step)])
st, rt, dt = self.env.end_dummy()
self.sequence.extend([[st, action, rt, dt]
for i in range(self.n_step)])
# self.calc_nstep_reward()
# self.calc_priorities()
for i in range(len(self.sequence)):
for j in range(4):
self.sequence[i][j] = self.sequence[i][j].cpu()
# for i in range(len(self.recurrent_state)):
# for j in range(4):
# self.recurrent_state[i][j] = self.recurrent_state[i][j].cpu()
for i in range(len(self.priority)):
self.priority[i] = self.priority[i].cpu()
blocking = True if self.shared_queue.qsize(
) > self.max_shared_q_size else False
self.shared_queue.put([self.sequence], block=blocking)
# if self.actor_id == 0:
print('\r#',
self.actor_id,
'frame:',
frame,
'step:',
count_step,
'reward: {:.3f}'.format(reward_sum.item()),
'qmin,max :{:.3f},{:.3f}, pminmax : {:.3f},{:.3f}'.format(
qmin, qmax, pmin, pmax),
end='\r')
class Actor:
def __init__(self, actor_id):
self.env = suite.load(domain_name="walker", task_name="run")
self.action_size = self.env.action_spec().shape[0]
self.obs_size = get_obs(self.env.reset().observation).shape[1]
self.actor_id = actor_id
self.burn_in_length = 20 # 40-80
self.learning_length = 40
self.sequence_length = self.burn_in_length + self.learning_length
self.n_step = 5
self.sequence = []
self.recurrent_state = []
self.priority = []
self.td_loss = deque(maxlen=self.learning_length)
self.memory_sequence_size = 1000
self.memory = ReplayMemory(
memory_sequence_size=self.memory_sequence_size)
self.memory_save_interval = 3
self.gamma = 0.997
self.actor_parameter_update_interval = 500
self.model_path = './model_data/'
self.actor = ActorNet(self.obs_size,
self.action_size,
cuda_id=self.actor_id % 2 +
1).cuda(self.actor_id % 2 + 1).eval()
self.target_actor = deepcopy(self.actor)
self.critic = CriticNet(self.obs_size,
self.action_size,
cuda_id=self.actor_id % 2 +
1).cuda(self.actor_id % 2 + 1).eval()
self.target_critic = deepcopy(self.critic)
self.load_model()
self.epsilon = 1
self.last_obs = None
def load_model(self):
if os.path.isfile(self.model_path + 'model.pt'):
while True:
try:
# TODO: Delete
self.actor = ActorNet(self.obs_size, self.action_size,
self.actor_id % 2 + 1).cuda().eval()
self.target_actor = deepcopy(self.actor)
self.critic = CriticNet(self.obs_size, self.action_size,
self.actor_id % 2 +
1).cuda().eval()
self.target_critic = deepcopy(self.critic)
#model_dict = torch.load(self.model_path + 'model.pt', map_location={'cuda:0':'cuda:{}'.format(self.actor_id%2+1)})
model_dict = torch.load(self.model_path + 'model.pt')
self.actor.load_state_dict(model_dict['actor'])
self.target_actor.load_state_dict(
model_dict['target_actor'])
self.critic.load_state_dict(model_dict['critic'])
self.target_critic.load_state_dict(
model_dict['target_critic'])
self.actor.cuda(self.actor_id % 2 + 1)
self.target_actor.cuda(self.actor_id % 2 + 1)
self.critic.cuda(self.actor_id % 2 + 1)
self.target_critic.cuda(self.actor_id % 2 + 1)
except:
sleep(np.random.rand() * 5 + 2)
else:
break
def calc_nstep_reward(self):
for i in range(len(self.sequence) - self.n_step):
self.sequence[i][2][0] = sum([
self.sequence[i + j][2][0] * (self.gamma**j)
for j in range(self.n_step)
])
def calc_priorities(self):
self.actor.reset_state()
self.critic.reset_state()
self.target_actor.reset_state()
self.target_critic.reset_state()
self.td_loss = deque(maxlen=self.learning_length)
self.priority = []
for i in range(self.n_step):
next_obs = torch.from_numpy(
self.sequence[i][0]).cuda(self.actor_id % 2 + 1).unsqueeze(0)
next_action = self.target_actor(next_obs)
next_q_value = self.target_critic(
next_obs, next_action).detach().cpu().numpy()
for i in range(len(self.sequence) - self.n_step):
obs = torch.from_numpy(
self.sequence[i][0]).cuda(self.actor_id % 2 + 1).unsqueeze(0)
action = torch.from_numpy(
self.sequence[i][1]).cuda(self.actor_id % 2 + 1).unsqueeze(0)
next_obs = torch.from_numpy(
self.sequence[i + self.n_step][0]).cuda(self.actor_id % 2 +
1).unsqueeze(0)
next_action = self.target_actor(next_obs)
q_value = self.critic(obs, action).detach().cpu().numpy()
reward = self.sequence[i][2][0]
terminal = self.sequence[i + self.n_step - 1][3][0]
next_q_value = self.target_critic(
next_obs, next_action).detach().cpu().numpy()
if i >= self.burn_in_length:
target_q_value = (reward + (self.gamma**self.n_step) *
(1. - terminal) * next_q_value)
target_q_value = invertical_vf(
torch.tensor(target_q_value).cuda(
self.actor_id % 2 + 1)).detach().cpu().numpy()
self.td_loss.append((q_value - target_q_value).mean())
if i >= self.sequence_length:
self.priority.append(
calc_priority(
np.array(list(self.td_loss), dtype=np.float32)**2.))
def run(self):
episode = 0
step = 0
reward_sum = 0
while True:
time_step = self.env.reset()
obs = get_obs(time_step.observation)
self.actor.reset_state()
self.critic.reset_state()
self.target_actor.reset_state()
self.target_critic.reset_state()
self.sequence = []
self.recurrent_state = []
self.priority = []
self.td_loss.clear()
last_obs = None
episode_step = 0
done = False
if self.actor_id == 0 and episode != 0:
print('episode:', episode, 'step:', step, 'reward:',
reward_sum)
episode += 1
reward_sum = 0
while not time_step.last():
# get recurrent state
actor_hx, actor_cx = self.actor.get_state()
target_actor_hx, target_actor_cx = self.target_actor.get_state(
)
critic_hx, critic_cx = self.critic.get_state()
target_critic_hx, target_critic_cx = self.target_critic.get_state(
)
action = self.actor(
torch.from_numpy(obs).cuda(self.actor_id % 2 + 1))
target_action = self.target_actor(
torch.from_numpy(obs).cuda(self.actor_id % 2 + 1))
_ = self.critic(
torch.from_numpy(obs).cuda(self.actor_id % 2 + 1), action)
_ = self.target_critic(
torch.from_numpy(obs).cuda(self.actor_id % 2 + 1),
target_action)
action = action.detach().cpu().numpy()[0]
action += np.random.normal(0, 0.3, (self.action_size))
action = np.clip(action, -1, 1)
reward = 0.
sleep(0.01)
for i in range(4):
time_step = self.env.step(action)
next_obs = get_obs(time_step.observation)
reward += time_step.reward
if time_step.last():
break
reward_sum += reward
step += 1
episode_step += 1
terminal = 1. if time_step.last() else 0.
self.sequence.append((obs[0], action, [reward], [terminal]))
obs = next_obs.copy()
self.recurrent_state.append(
[[actor_hx[0], actor_cx[0]],
[target_actor_hx[0], target_actor_cx[0]],
[critic_hx[0], critic_cx[0]],
[target_critic_hx[0], target_critic_cx[0]]])
if step % self.actor_parameter_update_interval == 0:
self.load_model()
if len(self.sequence) >= self.sequence_length:
self.sequence.extend([(np.zeros((self.obs_size),
dtype=np.float32),
np.zeros((self.action_size),
dtype=np.float32), [0.], [1.])
for i in range(self.n_step)])
self.calc_nstep_reward()
self.calc_priorities()
self.memory.add(self.sequence, self.recurrent_state,
self.priority)
if len(self.memory.memory) > self.memory_save_interval:
self.memory.save(self.actor_id)
