class neural_architecture_search():
def __init__(self, args):
self.args = args
if not torch.cuda.is_available():
logging.info('no gpu device available')
sys.exit(1)
if self.args.distributed:
# Init distributed environment
self.rank, self.world_size, self.device = init_dist(
port=self.args.port)
self.seed = self.rank * self.args.seed
else:
torch.cuda.set_device(self.args.gpu)
self.device = torch.device("cuda")
self.rank = 0
self.seed = self.args.seed
self.world_size = 1
if self.args.fix_seedcudnn:
random.seed(self.seed)
torch.backends.cudnn.deterministic = True
np.random.seed(self.seed)
cudnn.benchmark = False
torch.manual_seed(self.seed)
cudnn.enabled = True
torch.cuda.manual_seed(self.seed)
torch.cuda.manual_seed_all(self.seed)
else:
np.random.seed(self.seed)
cudnn.benchmark = True
torch.manual_seed(self.seed)
cudnn.enabled = True
torch.cuda.manual_seed(self.seed)
torch.cuda.manual_seed_all(self.seed)
self.path = os.path.join(generate_date, self.args.save)
if self.rank == 0:
utils.create_exp_dir(generate_date,
self.path,
scripts_to_save=glob.glob('*.py'))
logging.basicConfig(stream=sys.stdout,
level=logging.INFO,
format=log_format,
datefmt='%m/%d %I:%M:%S %p')
fh = logging.FileHandler(os.path.join(self.path, 'log.txt'))
fh.setFormatter(logging.Formatter(log_format))
logging.getLogger().addHandler(fh)
logging.info("self.args = %s", self.args)
self.logger = tensorboardX.SummaryWriter(
'./runs/' + generate_date + '/nas_{}'.format(self.args.remark))
else:
self.logger = None
# set default resource_lambda for different methods
if self.args.resource_efficient:
if self.args.method == 'policy_gradient':
if self.args.log_penalty:
default_resource_lambda = 1e-4
else:
default_resource_lambda = 1e-5
if self.args.method == 'reparametrization':
if self.args.log_penalty:
default_resource_lambda = 1e-2
else:
default_resource_lambda = 1e-5
if self.args.method == 'discrete':
if self.args.log_penalty:
default_resource_lambda = 1e-2
else:
default_resource_lambda = 1e-4
if self.args.resource_lambda == default_lambda:
self.args.resource_lambda = default_resource_lambda
#initialize loss function
self.criterion = nn.CrossEntropyLoss().to(self.device)
#initialize model
self.init_model()
#calculate model param size
if self.rank == 0:
logging.info("param size = %fMB",
utils.count_parameters_in_MB(self.model))
self.model._logger = self.logger
self.model._logging = logging
#initialize optimizer
self.init_optimizer()
#iniatilize dataset loader
self.init_loaddata()
self.update_theta = True
self.update_alpha = True
def init_model(self):
self.model = Network(self.args.init_channels, CIFAR_CLASSES,
self.args.layers, self.criterion, self.args,
self.rank, self.world_size)
self.model.to(self.device)
if self.args.distributed:
broadcast_params(self.model)
for v in self.model.parameters():
if v.requires_grad:
if v.grad is None:
v.grad = torch.zeros_like(v)
self.model.normal_log_alpha.grad = torch.zeros_like(
self.model.normal_log_alpha)
self.model.reduce_log_alpha.grad = torch.zeros_like(
self.model.reduce_log_alpha)
def init_optimizer(self):
if args.distributed:
self.optimizer = torch.optim.SGD(
[
param for name, param in self.model.named_parameters() if
name != 'normal_log_alpha' and name != 'reduce_log_alpha'
],
self.args.learning_rate,
momentum=self.args.momentum,
weight_decay=self.args.weight_decay)
self.arch_optimizer = torch.optim.Adam(
[
param for name, param in self.model.named_parameters()
if name == 'normal_log_alpha' or name == 'reduce_log_alpha'
],
lr=self.args.arch_learning_rate,
betas=(0.5, 0.999),
weight_decay=self.args.arch_weight_decay)
else:
self.optimizer = torch.optim.SGD(self.model.parameters(),
self.args.learning_rate,
momentum=self.args.momentum,
weight_decay=args.weight_decay)
self.arch_optimizer = torch.optim.SGD(
self.model.arch_parameters(), lr=self.args.arch_learning_rate)
def init_loaddata(self):
train_transform, valid_transform = utils._data_transforms_cifar10(
self.args)
train_data = dset.CIFAR10(root=self.args.data,
train=True,
download=True,
transform=train_transform)
valid_data = dset.CIFAR10(root=self.args.data,
train=False,
download=True,
transform=valid_transform)
if self.args.seed:
def worker_init_fn():
seed = self.seed
np.random.seed(seed)
random.seed(seed)
torch.manual_seed(seed)
return
else:
worker_init_fn = None
if self.args.distributed:
train_sampler = DistributedSampler(train_data)
valid_sampler = DistributedSampler(valid_data)
self.train_queue = torch.utils.data.DataLoader(
train_data,
batch_size=self.args.batch_size // self.world_size,
shuffle=False,
num_workers=0,
pin_memory=False,
sampler=train_sampler)
self.valid_queue = torch.utils.data.DataLoader(
valid_data,
batch_size=self.args.batch_size // self.world_size,
shuffle=False,
num_workers=0,
pin_memory=False,
sampler=valid_sampler)
else:
self.train_queue = torch.utils.data.DataLoader(
train_data,
batch_size=self.args.batch_size,
shuffle=True,
pin_memory=False,
num_workers=2)
self.valid_queue = torch.utils.data.DataLoader(
valid_data,
batch_size=self.args.batch_size,
shuffle=False,
pin_memory=False,
num_workers=2)
def main(self):
# lr scheduler: cosine annealing
# temp scheduler: linear annealing (self-defined in utils)
self.scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(
self.optimizer,
float(self.args.epochs),
eta_min=self.args.learning_rate_min)
self.temp_scheduler = utils.Temp_Scheduler(self.args.epochs,
self.model._temp,
self.args.temp,
temp_min=self.args.temp_min)
for epoch in range(self.args.epochs):
if self.args.random_sample_pretrain:
if epoch < self.args.random_sample_pretrain_epoch:
self.args.random_sample = True
else:
self.args.random_sample = False
self.scheduler.step()
if self.args.temp_annealing:
self.model._temp = self.temp_scheduler.step()
self.lr = self.scheduler.get_lr()[0]
if self.rank == 0:
logging.info('epoch %d lr %e temp %e', epoch, self.lr,
self.model._temp)
self.logger.add_scalar('epoch_temp', self.model._temp, epoch)
logging.info(self.model.normal_log_alpha)
logging.info(self.model.reduce_log_alpha)
logging.info(
self.model._get_weights(self.model.normal_log_alpha[0]))
logging.info(
self.model._get_weights(self.model.reduce_log_alpha[0]))
genotype_edge_all = self.model.genotype_edge_all()
if self.rank == 0:
logging.info('genotype_edge_all = %s', genotype_edge_all)
# create genotypes.txt file
txt_name = self.args.remark + '_genotype_edge_all_epoch' + str(
epoch)
utils.txt('genotype', self.args.save, txt_name,
str(genotype_edge_all), generate_date)
self.model.train()
train_acc, loss, error_loss, loss_alpha = self.train(
epoch, logging)
if self.rank == 0:
logging.info('train_acc %f', train_acc)
self.logger.add_scalar("epoch_train_acc", train_acc, epoch)
self.logger.add_scalar("epoch_train_error_loss", error_loss,
epoch)
if self.args.dsnas:
self.logger.add_scalar("epoch_train_alpha_loss",
loss_alpha, epoch)
# validation
self.model.eval()
valid_acc, valid_obj = self.infer(epoch)
if self.args.gen_max_child:
self.args.gen_max_child_flag = True
valid_acc_max_child, valid_obj_max_child = self.infer(epoch)
self.args.gen_max_child_flag = False
if self.rank == 0:
logging.info('valid_acc %f', valid_acc)
self.logger.add_scalar("epoch_valid_acc", valid_acc, epoch)
if self.args.gen_max_child:
logging.info('valid_acc_argmax_alpha %f',
valid_acc_max_child)
self.logger.add_scalar("epoch_valid_acc_argmax_alpha",
valid_acc_max_child, epoch)
utils.save(self.model, os.path.join(self.path, 'weights.pt'))
if self.rank == 0:
logging.info(self.model.normal_log_alpha)
logging.info(self.model.reduce_log_alpha)
genotype_edge_all = self.model.genotype_edge_all()
logging.info('genotype_edge_all = %s', genotype_edge_all)
def train(self, epoch, logging):
objs = utils.AvgrageMeter()
top1 = utils.AvgrageMeter()
top5 = utils.AvgrageMeter()
grad = utils.AvgrageMeter()
normal_resource_gradient = 0
reduce_resource_gradient = 0
normal_loss_gradient = 0
reduce_loss_gradient = 0
normal_total_gradient = 0
reduce_total_gradient = 0
loss_alpha = None
count = 0
for step, (input, target) in enumerate(self.train_queue):
if self.args.alternate_update:
if step % 2 == 0:
self.update_theta = True
self.update_alpha = False
else:
self.update_theta = False
self.update_alpha = True
n = input.size(0)
input = input.to(self.device)
target = target.to(self.device, non_blocking=True)
if self.args.snas:
logits, logits_aux, penalty, op_normal, op_reduce = self.model(
input)
error_loss = self.criterion(logits, target)
if self.args.auxiliary:
loss_aux = self.criterion(logits_aux, target)
error_loss += self.args.auxiliary_weight * loss_aux
if self.args.dsnas:
logits, error_loss, loss_alpha, penalty = self.model(
input, target, self.criterion)
num_normal = self.model.num_normal
num_reduce = self.model.num_reduce
normal_arch_entropy = self.model._arch_entropy(
self.model.normal_log_alpha)
reduce_arch_entropy = self.model._arch_entropy(
self.model.reduce_log_alpha)
if self.args.resource_efficient:
if self.args.method == 'policy_gradient':
resource_penalty = (penalty[2]) / 6 + self.args.ratio * (
penalty[7]) / 2
log_resource_penalty = (
penalty[35]) / 6 + self.args.ratio * (penalty[36]) / 2
elif self.args.method == 'reparametrization':
resource_penalty = (penalty[26]) / 6 + self.args.ratio * (
penalty[25]) / 2
log_resource_penalty = (
penalty[37]) / 6 + self.args.ratio * (penalty[38]) / 2
elif self.args.method == 'discrete':
resource_penalty = (penalty[28]) / 6 + self.args.ratio * (
penalty[27]) / 2
log_resource_penalty = (
penalty[39]) / 6 + self.args.ratio * (penalty[40]) / 2
elif self.args.method == 'none':
# TODo
resource_penalty = torch.zeros(1).cuda()
log_resource_penalty = torch.zeros(1).cuda()
else:
logging.info(
"wrongly input of method, please re-enter --method from 'policy_gradient', 'discrete', "
"'reparametrization', 'none'")
sys.exit(1)
else:
resource_penalty = torch.zeros(1).cuda()
log_resource_penalty = torch.zeros(1).cuda()
if self.args.log_penalty:
resource_loss = self.model._resource_lambda * log_resource_penalty
else:
resource_loss = self.model._resource_lambda * resource_penalty
if self.args.loss:
if self.args.snas:
loss = resource_loss.clone() + error_loss.clone()
elif self.args.dsnas:
loss = resource_loss.clone()
else:
loss = resource_loss.clone() + -child_coef * (
torch.log(normal_one_hot_prob) +
torch.log(reduce_one_hot_prob)).sum()
else:
if self.args.snas or self.args.dsnas:
loss = error_loss.clone()
if self.args.distributed:
loss.div_(self.world_size)
error_loss.div_(self.world_size)
resource_loss.div_(self.world_size)
if self.args.dsnas:
loss_alpha.div_(self.world_size)
# logging gradient
count += 1
if self.args.resource_efficient:
self.optimizer.zero_grad()
self.arch_optimizer.zero_grad()
resource_loss.backward(retain_graph=True)
if not self.args.random_sample:
normal_resource_gradient += self.model.normal_log_alpha.grad
reduce_resource_gradient += self.model.reduce_log_alpha.grad
if self.args.snas:
self.optimizer.zero_grad()
self.arch_optimizer.zero_grad()
error_loss.backward(retain_graph=True)
if not self.args.random_sample:
normal_loss_gradient += self.model.normal_log_alpha.grad
reduce_loss_gradient += self.model.reduce_log_alpha.grad
self.optimizer.zero_grad()
self.arch_optimizer.zero_grad()
if self.args.snas or not self.args.random_sample and not self.args.dsnas:
loss.backward()
if not self.args.random_sample:
normal_total_gradient += self.model.normal_log_alpha.grad
reduce_total_gradient += self.model.reduce_log_alpha.grad
if self.args.distributed:
reduce_tensorgradients(self.model.parameters(), sync=True)
nn.utils.clip_grad_norm_([
param for name, param in self.model.named_parameters() if
name != 'normal_log_alpha' and name != 'reduce_log_alpha'
], self.args.grad_clip)
arch_grad_norm = nn.utils.clip_grad_norm_([
param for name, param in self.model.named_parameters()
if name == 'normal_log_alpha' or name == 'reduce_log_alpha'
], 10.)
else:
nn.utils.clip_grad_norm_(self.model.parameters(),
self.args.grad_clip)
arch_grad_norm = nn.utils.clip_grad_norm_(
self.model.arch_parameters(), 10.)
grad.update(arch_grad_norm)
if not self.args.fix_weight and self.update_theta:
self.optimizer.step()
self.optimizer.zero_grad()
if not self.args.random_sample and self.update_alpha:
self.arch_optimizer.step()
self.arch_optimizer.zero_grad()
if self.rank == 0:
self.logger.add_scalar(
"iter_train_loss", error_loss,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"normal_arch_entropy", normal_arch_entropy,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reduce_arch_entropy", reduce_arch_entropy,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"total_arch_entropy",
normal_arch_entropy + reduce_arch_entropy,
step + len(self.train_queue.dataset) * epoch)
if self.args.dsnas:
#reward_normal_edge
self.logger.add_scalar(
"reward_normal_edge_0",
self.model.normal_edge_reward[0],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_1",
self.model.normal_edge_reward[1],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_2",
self.model.normal_edge_reward[2],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_3",
self.model.normal_edge_reward[3],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_4",
self.model.normal_edge_reward[4],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_5",
self.model.normal_edge_reward[5],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_6",
self.model.normal_edge_reward[6],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_7",
self.model.normal_edge_reward[7],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_8",
self.model.normal_edge_reward[8],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_9",
self.model.normal_edge_reward[9],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_10",
self.model.normal_edge_reward[10],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_11",
self.model.normal_edge_reward[11],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_12",
self.model.normal_edge_reward[12],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_normal_edge_13",
self.model.normal_edge_reward[13],
step + len(self.train_queue.dataset) * epoch)
#reward_reduce_edge
self.logger.add_scalar(
"reward_reduce_edge_0",
self.model.reduce_edge_reward[0],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_1",
self.model.reduce_edge_reward[1],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_2",
self.model.reduce_edge_reward[2],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_3",
self.model.reduce_edge_reward[3],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_4",
self.model.reduce_edge_reward[4],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_5",
self.model.reduce_edge_reward[5],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_6",
self.model.reduce_edge_reward[6],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_7",
self.model.reduce_edge_reward[7],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_8",
self.model.reduce_edge_reward[8],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_9",
self.model.reduce_edge_reward[9],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_10",
self.model.reduce_edge_reward[10],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_11",
self.model.reduce_edge_reward[11],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_12",
self.model.reduce_edge_reward[12],
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"reward_reduce_edge_13",
self.model.reduce_edge_reward[13],
step + len(self.train_queue.dataset) * epoch)
#policy size
self.logger.add_scalar(
"iter_normal_size_policy", penalty[2] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_size_policy", penalty[7] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# baseline: discrete_probability
self.logger.add_scalar(
"iter_normal_size_baseline", penalty[3] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_flops_baseline", penalty[5] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_mac_baseline", penalty[6] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_size_baseline", penalty[8] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_flops_baseline", penalty[9] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_mac_baseline", penalty[10] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# R - median(R)
self.logger.add_scalar(
"iter_normal_size-avg", penalty[60] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_flops-avg", penalty[61] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_mac-avg", penalty[62] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_size-avg", penalty[63] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_flops-avg", penalty[64] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_mac-avg", penalty[65] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# lnR - ln(median)
self.logger.add_scalar(
"iter_normal_ln_size-ln_avg", penalty[66] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_ln_flops-ln_avg", penalty[67] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_ln_mac-ln_avg", penalty[68] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_ln_size-ln_avg", penalty[69] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_ln_flops-ln_avg", penalty[70] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_ln_mac-ln_avg", penalty[71] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
'''
self.logger.add_scalar("iter_normal_size_normalized", penalty[17] / 6, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_normal_flops_normalized", penalty[18] / 6, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_normal_mac_normalized", penalty[19] / 6, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_reduce_size_normalized", penalty[20] / 2, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_reduce_flops_normalized", penalty[21] / 2, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_reduce_mac_normalized", penalty[22] / 2, step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_normal_penalty_normalized", penalty[23] / 6,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar("iter_reduce_penalty_normalized", penalty[24] / 2,
step + len(self.train_queue.dataset) * epoch)
'''
# Monte_Carlo(R_i)
self.logger.add_scalar(
"iter_normal_size_mc", penalty[29] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_flops_mc", penalty[30] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_mac_mc", penalty[31] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_size_mc", penalty[32] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_flops_mc", penalty[33] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_mac_mc", penalty[34] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# log(|R_i|)
self.logger.add_scalar(
"iter_normal_log_size", penalty[41] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_log_flops", penalty[42] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_log_mac", penalty[43] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_log_size", penalty[44] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_log_flops", penalty[45] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_log_mac", penalty[46] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# log(P)R_i
self.logger.add_scalar(
"iter_normal_logP_size", penalty[47] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_logP_flops", penalty[48] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_logP_mac", penalty[49] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_size", penalty[50] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_flops", penalty[51] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_mac", penalty[52] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
# log(P)log(R_i)
self.logger.add_scalar(
"iter_normal_logP_log_size", penalty[53] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_logP_log_flops", penalty[54] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_normal_logP_log_mac", penalty[55] / num_normal,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_log_size", penalty[56] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_log_flops", penalty[57] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_reduce_logP_log_mac", penalty[58] / num_reduce,
step + len(self.train_queue.dataset) * epoch)
prec1, prec5 = utils.accuracy(logits, target, topk=(1, 5))
if self.args.distributed:
loss = loss.detach()
dist.all_reduce(error_loss)
dist.all_reduce(prec1)
dist.all_reduce(prec5)
prec1.div_(self.world_size)
prec5.div_(self.world_size)
#dist_util.all_reduce([loss, prec1, prec5], 'mean')
objs.update(error_loss.item(), n)
top1.update(prec1.item(), n)
top5.update(prec5.item(), n)
if step % self.args.report_freq == 0 and self.rank == 0:
logging.info('train %03d %e %f %f', step, objs.avg, top1.avg,
top5.avg)
self.logger.add_scalar(
"iter_train_top1_acc", top1.avg,
step + len(self.train_queue.dataset) * epoch)
if self.rank == 0:
logging.info('-------resource gradient--------')
logging.info(normal_resource_gradient / count)
logging.info(reduce_resource_gradient / count)
logging.info('-------loss gradient--------')
logging.info(normal_loss_gradient / count)
logging.info(reduce_loss_gradient / count)
logging.info('-------total gradient--------')
logging.info(normal_total_gradient / count)
logging.info(reduce_total_gradient / count)
return top1.avg, loss, error_loss, loss_alpha
def infer(self, epoch):
objs = utils.AvgrageMeter()
top1 = utils.AvgrageMeter()
top5 = utils.AvgrageMeter()
self.model.eval()
with torch.no_grad():
for step, (input, target) in enumerate(self.valid_queue):
input = input.to(self.device)
target = target.to(self.device)
if self.args.snas:
logits, logits_aux, resource_loss, op_normal, op_reduce = self.model(
input)
loss = self.criterion(logits, target)
elif self.args.dsnas:
logits, error_loss, loss_alpha, resource_loss = self.model(
input, target, self.criterion)
loss = error_loss
prec1, prec5 = utils.accuracy(logits, target, topk=(1, 5))
if self.args.distributed:
loss.div_(self.world_size)
loss = loss.detach()
dist.all_reduce(loss)
dist.all_reduce(prec1)
dist.all_reduce(prec5)
prec1.div_(self.world_size)
prec5.div_(self.world_size)
objs.update(loss.item(), input.size(0))
top1.update(prec1.item(), input.size(0))
top5.update(prec5.item(), input.size(0))
if step % self.args.report_freq == 0 and self.rank == 0:
logging.info('valid %03d %e %f %f', step, objs.avg,
top1.avg, top5.avg)
self.logger.add_scalar(
"iter_valid_loss", loss,
step + len(self.valid_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_valid_top1_acc", top1.avg,
step + len(self.valid_queue.dataset) * epoch)
return top1.avg, objs.avg
class neural_architecture_search():
def __init__(self, args):
self.args = args
if not torch.cuda.is_available():
logging.info('no gpu device available')
sys.exit(1)
torch.cuda.set_device(self.args.gpu)
self.device = torch.device("cuda")
self.rank = 0
self.seed = self.args.seed
self.world_size = 1
if self.args.fix_cudnn:
random.seed(self.seed)
torch.backends.cudnn.deterministic = True
np.random.seed(self.seed)
cudnn.benchmark = False
torch.manual_seed(self.seed)
cudnn.enabled = True
torch.cuda.manual_seed(self.seed)
torch.cuda.manual_seed_all(self.seed)
else:
np.random.seed(self.seed)
cudnn.benchmark = True
torch.manual_seed(self.seed)
cudnn.enabled = True
torch.cuda.manual_seed(self.seed)
torch.cuda.manual_seed_all(self.seed)
self.path = os.path.join(generate_date, self.args.save)
if self.rank == 0:
utils.create_exp_dir(generate_date,
self.path,
scripts_to_save=glob.glob('*.py'))
logging.basicConfig(stream=sys.stdout,
level=logging.INFO,
format=log_format,
datefmt='%m/%d %I:%M:%S %p')
fh = logging.FileHandler(os.path.join(self.path, 'log.txt'))
fh.setFormatter(logging.Formatter(log_format))
logging.getLogger().addHandler(fh)
logging.info("self.args = %s", self.args)
self.logger = tensorboardX.SummaryWriter('./runs/' +
generate_date + '/' +
self.args.save_log)
else:
self.logger = None
#initialize loss function
self.criterion = nn.CrossEntropyLoss().to(self.device)
#initialize model
self.init_model()
if self.args.resume:
self.reload_model()
#calculate model param size
if self.rank == 0:
logging.info("param size = %fMB",
utils.count_parameters_in_MB(self.model))
self.model._logger = self.logger
self.model._logging = logging
#initialize optimizer
self.init_optimizer()
#iniatilize dataset loader
self.init_loaddata()
self.update_theta = True
self.update_alpha = True
def init_model(self):
self.model = Network(self.args.init_channels, CIFAR_CLASSES,
self.args.layers, self.criterion, self.args,
self.rank, self.world_size, self.args.steps,
self.args.multiplier)
self.model.to(self.device)
for v in self.model.parameters():
if v.requires_grad:
if v.grad is None:
v.grad = torch.zeros_like(v)
self.model.normal_log_alpha.grad = torch.zeros_like(
self.model.normal_log_alpha)
self.model.reduce_log_alpha.grad = torch.zeros_like(
self.model.reduce_log_alpha)
def reload_model(self):
self.model.load_state_dict(torch.load(self.args.resume_path +
'/weights.pt'),
strict=True)
def init_optimizer(self):
self.optimizer = torch.optim.SGD(self.model.parameters(),
self.args.learning_rate,
momentum=self.args.momentum,
weight_decay=args.weight_decay)
self.arch_optimizer = torch.optim.Adam(
self.model.arch_parameters(),
lr=self.args.arch_learning_rate,
betas=(0.5, 0.999),
weight_decay=self.args.arch_weight_decay)
def init_loaddata(self):
train_transform, valid_transform = utils._data_transforms_cifar10(
self.args)
train_data = dset.CIFAR10(root=self.args.data,
train=True,
download=True,
transform=train_transform)
valid_data = dset.CIFAR10(root=self.args.data,
train=False,
download=True,
transform=valid_transform)
if self.args.seed:
def worker_init_fn():
seed = self.seed
np.random.seed(seed)
random.seed(seed)
torch.manual_seed(seed)
return
else:
worker_init_fn = None
num_train = len(train_data)
indices = list(range(num_train))
self.train_queue = torch.utils.data.DataLoader(
train_data,
batch_size=self.args.batch_size,
shuffle=True,
pin_memory=False,
num_workers=2)
self.valid_queue = torch.utils.data.DataLoader(
valid_data,
batch_size=self.args.batch_size,
shuffle=False,
pin_memory=False,
num_workers=2)
def main(self):
# lr scheduler: cosine annealing
# temp scheduler: linear annealing (self-defined in utils)
self.scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(
self.optimizer,
float(self.args.epochs),
eta_min=self.args.learning_rate_min)
self.temp_scheduler = utils.Temp_Scheduler(self.args.epochs,
self.model._temp,
self.args.temp,
temp_min=self.args.temp_min)
for epoch in range(self.args.epochs):
if self.args.child_reward_stat:
self.update_theta = False
self.update_alpha = False
if self.args.current_reward:
self.model.normal_reward_mean = torch.zeros_like(
self.model.normal_reward_mean)
self.model.reduce_reward_mean = torch.zeros_like(
self.model.reduce_reward_mean)
self.model.count = 0
if epoch < self.args.resume_epoch:
continue
self.scheduler.step()
if self.args.temp_annealing:
self.model._temp = self.temp_scheduler.step()
self.lr = self.scheduler.get_lr()[0]
if self.rank == 0:
logging.info('epoch %d lr %e temp %e', epoch, self.lr,
self.model._temp)
self.logger.add_scalar('epoch_temp', self.model._temp, epoch)
logging.info(self.model.normal_log_alpha)
logging.info(self.model.reduce_log_alpha)
logging.info(F.softmax(self.model.normal_log_alpha, dim=-1))
logging.info(F.softmax(self.model.reduce_log_alpha, dim=-1))
genotype_edge_all = self.model.genotype_edge_all()
if self.rank == 0:
logging.info('genotype_edge_all = %s', genotype_edge_all)
# create genotypes.txt file
txt_name = remark + '_genotype_edge_all_epoch' + str(epoch)
utils.txt('genotype', self.args.save, txt_name,
str(genotype_edge_all), generate_date)
self.model.train()
train_acc, loss, error_loss, loss_alpha = self.train(
epoch, logging)
if self.rank == 0:
logging.info('train_acc %f', train_acc)
self.logger.add_scalar("epoch_train_acc", train_acc, epoch)
self.logger.add_scalar("epoch_train_error_loss", error_loss,
epoch)
if self.args.dsnas:
self.logger.add_scalar("epoch_train_alpha_loss",
loss_alpha, epoch)
if self.args.dsnas and not self.args.child_reward_stat:
if self.args.current_reward:
logging.info('reward mean stat')
logging.info(self.model.normal_reward_mean)
logging.info(self.model.reduce_reward_mean)
logging.info('count')
logging.info(self.model.count)
else:
logging.info('reward mean stat')
logging.info(self.model.normal_reward_mean)
logging.info(self.model.reduce_reward_mean)
if self.model.normal_reward_mean.size(0) > 1:
logging.info('reward mean total stat')
logging.info(self.model.normal_reward_mean.sum(0))
logging.info(self.model.reduce_reward_mean.sum(0))
if self.args.child_reward_stat:
logging.info('reward mean stat')
logging.info(self.model.normal_reward_mean.sum(0))
logging.info(self.model.reduce_reward_mean.sum(0))
logging.info('reward var stat')
logging.info(
self.model.normal_reward_mean_square.sum(0) -
self.model.normal_reward_mean.sum(0)**2)
logging.info(
self.model.reduce_reward_mean_square.sum(0) -
self.model.reduce_reward_mean.sum(0)**2)
# validation
self.model.eval()
valid_acc, valid_obj = self.infer(epoch)
if self.args.gen_max_child:
self.args.gen_max_child_flag = True
valid_acc_max_child, valid_obj_max_child = self.infer(epoch)
self.args.gen_max_child_flag = False
if self.rank == 0:
logging.info('valid_acc %f', valid_acc)
self.logger.add_scalar("epoch_valid_acc", valid_acc, epoch)
if self.args.gen_max_child:
logging.info('valid_acc_argmax_alpha %f',
valid_acc_max_child)
self.logger.add_scalar("epoch_valid_acc_argmax_alpha",
valid_acc_max_child, epoch)
utils.save(self.model, os.path.join(self.path, 'weights.pt'))
if self.rank == 0:
logging.info(self.model.normal_log_alpha)
logging.info(self.model.reduce_log_alpha)
genotype_edge_all = self.model.genotype_edge_all()
logging.info('genotype_edge_all = %s', genotype_edge_all)
def train(self, epoch, logging):
objs = utils.AvgrageMeter()
top1 = utils.AvgrageMeter()
top5 = utils.AvgrageMeter()
grad = utils.AvgrageMeter()
normal_loss_gradient = 0
reduce_loss_gradient = 0
normal_total_gradient = 0
reduce_total_gradient = 0
loss_alpha = None
train_correct_count = 0
train_correct_cost = 0
train_correct_entropy = 0
train_correct_loss = 0
train_wrong_count = 0
train_wrong_cost = 0
train_wrong_entropy = 0
train_wrong_loss = 0
count = 0
for step, (input, target) in enumerate(self.train_queue):
n = input.size(0)
input = input.to(self.device)
target = target.to(self.device, non_blocking=True)
if self.args.snas:
logits, logits_aux = self.model(input)
error_loss = self.criterion(logits, target)
if self.args.auxiliary:
loss_aux = self.criterion(logits_aux, target)
error_loss += self.args.auxiliary_weight * loss_aux
if self.args.dsnas:
logits, error_loss, loss_alpha = self.model(
input,
target,
self.criterion,
update_theta=self.update_theta,
update_alpha=self.update_alpha)
for i in range(logits.size(0)):
index = logits[i].topk(5, 0, True, True)[1]
if index[0].item() == target[i].item():
train_correct_cost += (
-logits[i, target[i].item()] +
(F.softmax(logits[i]) * logits[i]).sum())
train_correct_count += 1
discrete_prob = F.softmax(logits[i], dim=-1)
train_correct_entropy += -(
discrete_prob * torch.log(discrete_prob)).sum(-1)
train_correct_loss += -torch.log(discrete_prob)[
target[i].item()]
else:
train_wrong_cost += (
-logits[i, target[i].item()] +
(F.softmax(logits[i]) * logits[i]).sum())
train_wrong_count += 1
discrete_prob = F.softmax(logits[i], dim=-1)
train_wrong_entropy += -(discrete_prob *
torch.log(discrete_prob)).sum(-1)
train_wrong_loss += -torch.log(discrete_prob)[
target[i].item()]
num_normal = self.model.num_normal
num_reduce = self.model.num_reduce
if self.args.snas or self.args.dsnas:
loss = error_loss.clone()
#self.update_lr()
# logging gradient
count += 1
if self.args.snas:
self.optimizer.zero_grad()
self.arch_optimizer.zero_grad()
error_loss.backward(retain_graph=True)
if not self.args.random_sample:
normal_loss_gradient += self.model.normal_log_alpha.grad
reduce_loss_gradient += self.model.reduce_log_alpha.grad
self.optimizer.zero_grad()
self.arch_optimizer.zero_grad()
if self.args.snas and (not self.args.random_sample
and not self.args.dsnas):
loss.backward()
if not self.args.random_sample:
normal_total_gradient += self.model.normal_log_alpha.grad
reduce_total_gradient += self.model.reduce_log_alpha.grad
nn.utils.clip_grad_norm_(self.model.parameters(),
self.args.grad_clip)
arch_grad_norm = nn.utils.clip_grad_norm_(
self.model.arch_parameters(), 10.)
grad.update(arch_grad_norm)
if not self.args.fix_weight and self.update_theta:
self.optimizer.step()
self.optimizer.zero_grad()
if not self.args.random_sample and self.update_alpha:
self.arch_optimizer.step()
self.arch_optimizer.zero_grad()
prec1, prec5 = utils.accuracy(logits, target, topk=(1, 5))
objs.update(error_loss.item(), n)
top1.update(prec1.item(), n)
top5.update(prec5.item(), n)
if step % self.args.report_freq == 0 and self.rank == 0:
logging.info('train %03d %e %f %f', step, objs.avg, top1.avg,
top5.avg)
self.logger.add_scalar(
"iter_train_top1_acc", top1.avg,
step + len(self.train_queue.dataset) * epoch)
if self.rank == 0:
logging.info('-------loss gradient--------')
logging.info(normal_loss_gradient / count)
logging.info(reduce_loss_gradient / count)
logging.info('-------total gradient--------')
logging.info(normal_total_gradient / count)
logging.info(reduce_total_gradient / count)
logging.info('correct loss ')
logging.info((train_correct_loss / train_correct_count).item())
logging.info('correct entropy ')
logging.info((train_correct_entropy / train_correct_count).item())
logging.info('correct cost ')
logging.info((train_correct_cost / train_correct_count).item())
logging.info('correct count ')
logging.info(train_correct_count)
logging.info('wrong loss ')
logging.info((train_wrong_loss / train_wrong_count).item())
logging.info('wrong entropy ')
logging.info((train_wrong_entropy / train_wrong_count).item())
logging.info('wrong cost ')
logging.info((train_wrong_cost / train_wrong_count).item())
logging.info('wrong count ')
logging.info(train_wrong_count)
logging.info('total loss ')
logging.info(((train_correct_loss + train_wrong_loss) /
(train_correct_count + train_wrong_count)).item())
logging.info('total entropy ')
logging.info(((train_correct_entropy + train_wrong_entropy) /
(train_correct_count + train_wrong_count)).item())
logging.info('total cost ')
logging.info(((train_correct_cost + train_wrong_cost) /
(train_correct_count + train_wrong_count)).item())
logging.info('total count ')
logging.info(train_correct_count + train_wrong_count)
return top1.avg, loss, error_loss, loss_alpha
def infer(self, epoch):
objs = utils.AvgrageMeter()
top1 = utils.AvgrageMeter()
top5 = utils.AvgrageMeter()
self.model.eval()
with torch.no_grad():
for step, (input, target) in enumerate(self.valid_queue):
input = input.to(self.device)
target = target.to(self.device)
if self.args.snas:
logits, logits_aux = self.model(input)
loss = self.criterion(logits, target)
elif self.args.dsnas:
logits, error_loss, loss_alpha = self.model(
input, target, self.criterion)
loss = error_loss
prec1, prec5 = utils.accuracy(logits, target, topk=(1, 5))
objs.update(loss.item(), input.size(0))
top1.update(prec1.item(), input.size(0))
top5.update(prec5.item(), input.size(0))
if step % self.args.report_freq == 0 and self.rank == 0:
logging.info('valid %03d %e %f %f', step, objs.avg,
top1.avg, top5.avg)
self.logger.add_scalar(
"iter_valid_loss", loss,
step + len(self.valid_queue.dataset) * epoch)
self.logger.add_scalar(
"iter_valid_top1_acc", top1.avg,
step + len(self.valid_queue.dataset) * epoch)
return top1.avg, objs.avg