def calc_gradients(self, input_dict, opt_step):
self.set_train()
value_preds_batch = input_dict['old_values']
old_action_log_probs_batch = input_dict['old_logp_actions']
advantage = input_dict['advantages']
old_mu_batch = input_dict['mu']
old_sigma_batch = input_dict['sigma']
return_batch = input_dict['returns']
actions_batch = input_dict['actions']
obs_batch = input_dict['obs']
obs_batch = self._preproc_obs(obs_batch)
lr = self.last_lr
kl = 1.0
lr_mul = 1.0
curr_e_clip = lr_mul * self.e_clip
batch_dict = {
'is_train': True,
'prev_actions': actions_batch,
'obs': obs_batch,
}
rnn_masks = None
if self.is_rnn:
rnn_masks = input_dict['rnn_masks']
batch_dict['rnn_states'] = input_dict['rnn_states']
batch_dict['seq_length'] = self.seq_len
res_dict = self.model(batch_dict)
action_log_probs = res_dict['prev_neglogp']
values = res_dict['value']
entropy = res_dict['entropy']
mu = res_dict['mu']
sigma = res_dict['sigma']
a_loss = common_losses.actor_loss(old_action_log_probs_batch,
action_log_probs, advantage,
self.ppo, curr_e_clip)
if self.use_experimental_cv:
c_loss = common_losses.critic_loss(value_preds_batch, values,
curr_e_clip, return_batch,
self.clip_value)
else:
if self.has_central_value:
c_loss = torch.zeros(1, device=self.ppo_device)
else:
c_loss = common_losses.critic_loss(value_preds_batch, values,
curr_e_clip, return_batch,
self.clip_value)
b_loss = self.bound_loss(mu)
losses, sum_mask = torch_ext.apply_masks([
a_loss.unsqueeze(1), c_loss,
entropy.unsqueeze(1),
b_loss.unsqueeze(1)
], rnn_masks)
a_loss, c_loss, entropy, b_loss = losses[0], losses[1], losses[
2], losses[3]
loss = a_loss + 0.5 * c_loss * self.critic_coef - entropy * self.entropy_coef + b_loss * self.bounds_loss_coef
for param in self.model.parameters():
param.grad = None
loss.backward()
if self.config['truncate_grads']:
nn.utils.clip_grad_norm_(self.model.parameters(), self.grad_norm)
if opt_step:
self.optimizer.step()
with torch.no_grad():
reduce_kl = not self.is_rnn
kl_dist = torch_ext.policy_kl(mu.detach(), sigma.detach(),
old_mu_batch, old_sigma_batch,
reduce_kl)
if self.is_rnn:
kl_dist = (kl_dist * rnn_masks).sum() / sum_mask
kl_dist = kl_dist.item()
self.train_result = (a_loss.item(), c_loss.item(), entropy.item(), \
kl_dist, self.last_lr, lr_mul, \
mu.detach(), sigma.detach(), b_loss.item())
def calc_gradients(self, input_dict):
value_preds_batch = input_dict['old_values']
old_action_log_probs_batch = input_dict['old_logp_actions']
advantage = input_dict['advantages']
return_batch = input_dict['returns']
actions_batch = input_dict['actions']
obs_batch = input_dict['obs']
obs_batch = self._preproc_obs(obs_batch)
lr = self.last_lr
kl = 1.0
lr_mul = 1.0
curr_e_clip = lr_mul * self.e_clip
batch_dict = {
'is_train': True,
'prev_actions': actions_batch,
'obs': obs_batch,
}
if self.use_action_masks:
batch_dict['action_masks'] = input_dict['action_masks']
rnn_masks = None
if self.is_rnn:
rnn_masks = input_dict['rnn_masks']
batch_dict['rnn_states'] = input_dict['rnn_states']
batch_dict['seq_length'] = self.seq_len
with torch.cuda.amp.autocast(enabled=self.mixed_precision):
res_dict = self.model(batch_dict)
action_log_probs = res_dict['prev_neglogp']
values = res_dict['value']
entropy = res_dict['entropy']
a_loss = common_losses.actor_loss(old_action_log_probs_batch,
action_log_probs, advantage,
self.ppo, curr_e_clip)
if self.use_experimental_cv:
c_loss = common_losses.critic_loss(value_preds_batch, values,
curr_e_clip, return_batch,
self.clip_value)
else:
if self.has_central_value:
c_loss = torch.zeros(1, device=self.ppo_device)
else:
c_loss = common_losses.critic_loss(value_preds_batch,
values, curr_e_clip,
return_batch,
self.clip_value)
losses, sum_mask = torch_ext.apply_masks(
[a_loss.unsqueeze(1), c_loss,
entropy.unsqueeze(1)], rnn_masks)
a_loss, c_loss, entropy = losses[0], losses[1], losses[2]
loss = a_loss + 0.5 * c_loss * self.critic_coef - entropy * self.entropy_coef
if self.multi_gpu:
self.optimizer.zero_grad()
else:
for param in self.model.parameters():
param.grad = None
self.scaler.scale(loss).backward()
if self.config['truncate_grads']:
if self.multi_gpu:
self.optimizer.synchronize()
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(),
self.grad_norm)
with self.optimizer.skip_synchronize():
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(),
self.grad_norm)
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.step(self.optimizer)
self.scaler.update()
with torch.no_grad():
kl_dist = 0.5 * (
(old_action_log_probs_batch - action_log_probs)**2)
if self.is_rnn:
kl_dist = (kl_dist *
rnn_masks).sum() / rnn_masks.numel() # / sum_mask
else:
kl_dist = kl_dist.mean()
self.train_result = (a_loss, c_loss, entropy, kl_dist, self.last_lr,
lr_mul)
def calc_gradients(self, input_dict):
value_preds_batch = input_dict['old_values']
old_action_log_probs_batch = input_dict['old_logp_actions']
advantage = input_dict['advantages']
old_mu_batch = input_dict['mu']
old_sigma_batch = input_dict['sigma']
return_batch = input_dict['returns']
actions_batch = input_dict['actions']
obs_batch = input_dict['obs']
obs_batch = self._preproc_obs(obs_batch)
lr_mul = 1.0
curr_e_clip = lr_mul * self.e_clip
batch_dict = {
'is_train': True,
'prev_actions': actions_batch,
'obs' : obs_batch,
}
rnn_masks = None
if self.is_rnn:
rnn_masks = input_dict['rnn_masks']
batch_dict['rnn_states'] = input_dict['rnn_states']
batch_dict['seq_length'] = self.seq_len
with torch.cuda.amp.autocast(enabled=self.mixed_precision):
res_dict = self.model(batch_dict)
action_log_probs = res_dict['prev_neglogp']
values = res_dict['values']
entropy = res_dict['entropy']
mu = res_dict['mus']
sigma = res_dict['sigmas']
if self.ewma_ppo:
ewma_dict = self.ewma_model(batch_dict)
proxy_neglogp = ewma_dict['prev_neglogp']
a_loss = common_losses.decoupled_actor_loss(old_action_log_probs_batch, action_log_probs, proxy_neglogp, advantage, curr_e_clip)
old_action_log_probs_batch = proxy_neglogp # to get right statistic later
old_mu_batch = ewma_dict['mus']
old_sigma_batch = ewma_dict['sigmas']
else:
a_loss = common_losses.actor_loss(old_action_log_probs_batch, action_log_probs, advantage, self.ppo, curr_e_clip)
if self.has_value_loss:
c_loss = common_losses.critic_loss(value_preds_batch, values, curr_e_clip, return_batch, self.clip_value)
else:
c_loss = torch.zeros(1, device=self.ppo_device)
if self.bound_loss_type == 'regularisation':
b_loss = self.reg_loss(mu)
elif self.bound_loss_type == 'bound':
b_loss = self.bound_loss(mu)
else:
b_loss = torch.zeros(1, device=self.ppo_device)
losses, sum_mask = torch_ext.apply_masks([a_loss.unsqueeze(1), c_loss, entropy.unsqueeze(1), b_loss.unsqueeze(1)], rnn_masks)
a_loss, c_loss, entropy, b_loss = losses[0], losses[1], losses[2], losses[3]
loss = a_loss + 0.5 * c_loss * self.critic_coef - entropy * self.entropy_coef + b_loss * self.bounds_loss_coef
if self.multi_gpu:
self.optimizer.zero_grad()
else:
for param in self.model.parameters():
param.grad = None
self.scaler.scale(loss).backward()
#TODO: Refactor this ugliest code of they year
if self.truncate_grads:
if self.multi_gpu:
self.optimizer.synchronize()
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(), self.grad_norm)
with self.optimizer.skip_synchronize():
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(), self.grad_norm)
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.step(self.optimizer)
self.scaler.update()
with torch.no_grad():
reduce_kl = rnn_masks is None
kl_dist = torch_ext.policy_kl(mu.detach(), sigma.detach(), old_mu_batch, old_sigma_batch, reduce_kl)
if rnn_masks is not None:
kl_dist = (kl_dist * rnn_masks).sum() / rnn_masks.numel() #/ sum_mask
if self.ewma_ppo:
self.ewma_model.update()
self.diagnostics.mini_batch(self,
{
'values' : value_preds_batch,
'returns' : return_batch,
'new_neglogp' : action_log_probs,
'old_neglogp' : old_action_log_probs_batch,
'masks' : rnn_masks
}, curr_e_clip, 0)
self.train_result = (a_loss, c_loss, entropy, \
kl_dist, self.last_lr, lr_mul, \
mu.detach(), sigma.detach(), b_loss)
def calc_gradients(self, input_dict):
value_preds_batch = input_dict['old_values']
old_action_log_probs_batch = input_dict['old_logp_actions']
advantage = input_dict['advantages']
return_batch = input_dict['returns']
actions_batch = input_dict['actions']
obs_batch = input_dict['obs']
obs_batch = self._preproc_obs(obs_batch)
lr_mul = 1.0
curr_e_clip = lr_mul * self.e_clip
batch_dict = {
'is_train': True,
'prev_actions': actions_batch,
'obs': obs_batch,
}
if self.use_action_masks:
batch_dict['action_masks'] = input_dict['action_masks']
rnn_masks = None
if self.is_rnn:
rnn_masks = input_dict['rnn_masks']
batch_dict['rnn_states'] = input_dict['rnn_states']
batch_dict['seq_length'] = self.seq_len
batch_dict['bptt_len'] = self.bptt_len
batch_dict['dones'] = input_dict['dones']
with torch.cuda.amp.autocast(enabled=self.mixed_precision):
res_dict = self.model(batch_dict)
action_log_probs = res_dict['prev_neglogp']
values = res_dict['values']
entropy = res_dict['entropy']
if self.ewma_ppo:
ewma_dict = self.ewma_model(batch_dict)
proxy_neglogp = ewma_dict['prev_neglogp']
a_loss = common_losses.decoupled_actor_loss(
old_action_log_probs_batch, action_log_probs,
proxy_neglogp, advantage, curr_e_clip)
old_action_log_probs_batch = proxy_neglogp # to get right statistic later
else:
a_loss = common_losses.actor_loss(old_action_log_probs_batch,
action_log_probs, advantage,
self.ppo, curr_e_clip)
if self.has_value_loss:
c_loss = common_losses.critic_loss(value_preds_batch, values,
curr_e_clip, return_batch,
self.clip_value)
else:
c_loss = torch.zeros(1, device=self.ppo_device)
losses, sum_mask = torch_ext.apply_masks(
[a_loss.unsqueeze(1), c_loss,
entropy.unsqueeze(1)], rnn_masks)
a_loss, c_loss, entropy = losses[0], losses[1], losses[2]
loss = a_loss + 0.5 * c_loss * self.critic_coef - entropy * self.entropy_coef
if self.multi_gpu:
self.optimizer.zero_grad()
else:
for param in self.model.parameters():
param.grad = None
self.scaler.scale(loss).backward()
if self.truncate_grads:
if self.multi_gpu:
self.optimizer.synchronize()
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(),
self.grad_norm)
with self.optimizer.skip_synchronize():
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.unscale_(self.optimizer)
nn.utils.clip_grad_norm_(self.model.parameters(),
self.grad_norm)
self.scaler.step(self.optimizer)
self.scaler.update()
else:
self.scaler.step(self.optimizer)
self.scaler.update()
with torch.no_grad():
kl_dist = 0.5 * (
(old_action_log_probs_batch - action_log_probs)**2)
if rnn_masks is not None:
kl_dist = (kl_dist *
rnn_masks).sum() / rnn_masks.numel() # / sum_mask
else:
kl_dist = kl_dist.mean()
if self.has_phasic_policy_gradients:
c_loss = self.ppg_aux_loss.train_value(self, input_dict)
if self.ewma_ppo:
self.ewma_model.update()
self.diagnostics.mini_batch(
self, {
'values': value_preds_batch,
'returns': return_batch,
'new_neglogp': action_log_probs,
'old_neglogp': old_action_log_probs_batch,
'masks': rnn_masks
}, curr_e_clip, 0)
self.train_result = (a_loss, c_loss, entropy, kl_dist, self.last_lr,
lr_mul)