def train():
# 1、make dataloader
# prepare train,val img_info list, elem is tuple;
train_loader, val_loader, num_class = cifar_make_data_loader(cfg)
# 2、make model
model = build_model(cfg, num_class)
# 3、 make optimizer
optimizer = make_optimizer(cfg, model)
# 4、 make lr_scheduler
scheduler = make_lr_scheduler(cfg, optimizer)
# 5、make loss: default use softmax loss
loss_fn = make_loss(cfg, num_class)
# get parameters
device = cfg.MODEL.DEVICE
use_gpu = device == "cuda"
pretrained = cfg.MODEL.PRETRAIN_PATH != ""
parallel = cfg.MODEL.PARALLEL
log_period = cfg.OUTPUT.LOG_PERIOD
ckpt_period = cfg.OUTPUT.CKPT_PERIOD
eval_period = cfg.OUTPUT.EVAL_PERIOD
output_dir = cfg.OUTPUT.DIRS
ckpt_save_path = output_dir + cfg.OUTPUT.CKPT_DIRS
epochs = cfg.SOLVER.MAX_EPOCHS
batch_size = cfg.SOLVER.BATCH_SIZE
grad_clip = cfg.SOLVER.GRAD_CLIP
batch_num = len(train_loader)
log_iters = batch_num // log_period
if not os.path.exists(ckpt_save_path):
os.makedirs(ckpt_save_path)
# create *_result.xlsx
# save the result for analyze
name = (cfg.OUTPUT.LOG_NAME).split(".")[0] + ".xlsx"
result_path = cfg.OUTPUT.DIRS + name
wb = xl.Workbook()
sheet = wb.worksheets[0]
titles = [
'size/M', 'speed/ms', 'final_planes', 'acc', 'loss', 'acc', 'loss',
'acc', 'loss'
]
sheet.append(titles)
check_epochs = [40, 80, 120, 160, 200, 240, 280, 320, 360, epochs]
values = []
logger = logging.getLogger("CDNet.train")
size = count_parameters(model)
values.append(format(size, '.2f'))
values.append(model.final_planes)
logger.info("the model size is {:.2} M".format(size))
logger.info("Starting Training CDNetwork")
best_acc = 0.
is_best = False
avg_loss, avg_acc = RunningAverageMeter(), RunningAverageMeter()
avg_time, global_avg_time = AverageMeter(), AverageMeter()
if parallel:
model = nn.DataParallel(model)
if use_gpu:
model = model.to(device)
for epoch in range(epochs):
scheduler.step()
lr = scheduler.get_lr()[0]
# if save epoch_num k, then run k+1 epoch next
if pretrained and epoch < model.start_epoch:
continue
# rest the record
model.train()
avg_loss.reset()
avg_acc.reset()
avg_time.reset()
for i, batch in enumerate(train_loader):
t0 = time.time()
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
res = model(imgs)
loss, acc = compute_loss_acc(res, labels, loss_fn)
loss.backward()
if grad_clip != 0:
nn.utils.clip_grad_norm_(model.parameters(), grad_clip)
optimizer.step()
optimizer.zero_grad()
t1 = time.time()
avg_time.update((t1 - t0) / batch_size)
avg_loss.update(loss)
avg_acc.update(acc)
# log info
if (i + 1) % log_iters == 0:
logger.info(
"epoch {}: {}/{} with loss is {:.5f} and acc is {:.3f}".
format(epoch + 1, i + 1, batch_num, avg_loss.avg,
avg_acc.avg))
logger.info(
"end epochs {}/{} with lr: {:.5f} and avg_time is: {:.3f} ms".
format(epoch + 1, epochs, lr, avg_time.avg * 1000))
global_avg_time.update(avg_time.avg)
# test the model
if (epoch + 1) % eval_period == 0 or (epoch + 1) in check_epochs:
model.eval()
logger.info("begin eval the model")
val_acc = AverageMeter()
with torch.no_grad():
for vi, batch in enumerate(val_loader):
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
res = model(imgs)
_, acc = compute_loss_acc(res, labels)
val_acc.update(acc)
logger.info("validation results at epoch:{}".format(epoch + 1))
logger.info("acc:{:.2%}".format(val_acc.avg))
# determine whether current model is the best
if val_acc.avg > best_acc:
logger.info("get a new best acc")
best_acc = val_acc.avg
is_best = True
# add the result to sheet
if (epoch + 1) in check_epochs:
val = [
format(val_acc.avg * 100, '.2f'),
format(avg_loss.avg, '.3f')
]
values.extend(val)
# whether to save the model
if (epoch + 1) % ckpt_period == 0 or is_best:
if parallel:
torch.save(
model.module.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
else:
torch.save(
model.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
logger.info("checkpoint {} was saved".format(epoch + 1))
if is_best:
if parallel:
torch.save(model.module.state_dict(),
ckpt_save_path + "best_ckpt.pth")
else:
torch.save(model.state_dict(),
ckpt_save_path + "best_ckpt.pth")
logger.info("best_checkpoint was saved")
is_best = False
values.insert(1, format(global_avg_time.avg * 1000, '.2f'))
sheet.append(values)
wb.save(result_path)
logger.info("best_acc:{:.2%}".format(best_acc))
logger.info("Ending training CDNetwork on cifar")
def train():
"""
# get an image for test the model
train_transform = build_transforms(cfg, is_train = True)
imgs = get_image("1.jpg")
img_tensor = train_transform(imgs[0])
# c,h,w = img_tensor.shape
# img_tensor = img_tensor.view(-1,c,h,w)
# add an axis
img_tensor = img_tensor.unsqueeze(0)
"""
# 1、make dataloader
train_loader, val_loader, num_query, num_class = make_data_loader(cfg)
#print("num_query:{},num_class:{}".format(num_query,num_class))
# 2、make model
model = build_model(cfg, num_class)
# model.eval()
# x = model(img_tensor)
# print(x.shape)
# 3、 make optimizer
optimizer = make_optimizer(cfg, model)
# 4、 make lr_scheduler
scheduler = make_lr_scheduler(cfg, optimizer)
# 5、 make loss_func
if cfg.MODEL.PCB_NECK:
# make loss specificially for pcb
loss_func = get_softmax_triplet_loss_fn(cfg, num_class)
else:
loss_func = make_loss(cfg, num_class)
# get paramters
log_period = cfg.OUTPUT.LOG_PERIOD
ckpt_period = cfg.OUTPUT.CHECKPOINT_PERIOD
eval_period = cfg.OUTPUT.EVAL_PERIOD
output_dir = cfg.OUTPUT.ROOT_DIR
device = cfg.MODEL.DEVICE
epochs = cfg.SOLVER.MAX_EPOCHS
use_gpu = device == "cuda"
use_neck = cfg.MODEL.NECK or cfg.MODEL.LEARN_REGION
# how many batch for each log
batch_size = cfg.SOLVER.IMGS_PER_BATCH
batch_num = len(train_loader)
log_iters = batch_num // log_period
pretrained = cfg.MODEL.PRETRAIN_PATH != ''
parallel = cfg.MODEL.PARALLEL
grad_clip = cfg.DARTS.GRAD_CLIP
feat_norm = cfg.TEST.FEAT_NORM
ckpt_save_path = cfg.OUTPUT.ROOT_DIR + cfg.OUTPUT.CKPT_DIR
if not os.path.exists(ckpt_save_path):
os.makedirs(ckpt_save_path)
# create *_result.xlsx
# save the result for analyze
name = (cfg.OUTPUT.LOG_NAME).split(".")[0] + ".xlsx"
result_path = cfg.OUTPUT.ROOT_DIR + name
wb = xl.Workbook()
sheet = wb.worksheets[0]
titles = [
'size/M', 'speed/ms', 'final_planes', 'acc', 'mAP', 'r1', 'r5', 'r10',
'loss', 'acc', 'mAP', 'r1', 'r5', 'r10', 'loss', 'acc', 'mAP', 'r1',
'r5', 'r10', 'loss'
]
sheet.append(titles)
check_epochs = [40, 80, 120, 160, 200, 240, 280, 320, 360, epochs]
values = []
logger = logging.getLogger('MobileNetReID.train')
# count parameter
size = count_parameters(model)
logger.info("the param number of the model is {:.2f} M".format(size))
values.append(format(size, '.2f'))
values.append(model.final_planes)
logger.info("Start training")
#count = 183, x, y = batch -> 11712 for train
if pretrained:
start_epoch = model.start_epoch
if parallel:
model = nn.DataParallel(model)
if use_gpu:
# model = nn.DataParallel(model)
model.to(device)
# save the best model
best_mAP, best_r1 = 0., 0.
is_best = False
# batch : img, pid, camid, img_path
avg_loss, avg_acc = RunningAverageMeter(), RunningAverageMeter()
avg_time, global_avg_time = AverageMeter(), AverageMeter()
global_avg_time.reset()
for epoch in range(epochs):
scheduler.step()
if pretrained and epoch < start_epoch - 1:
continue
model.train()
# sum_loss, sum_acc = 0., 0.
avg_loss.reset()
avg_acc.reset()
avg_time.reset()
for i, batch in enumerate(train_loader):
t0 = time.time()
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
res = model(imgs)
# score, feat = model(imgs)
# loss = loss_func(score, feat, labels)
loss, acc = compute_loss_acc(use_neck, res, labels, loss_func)
loss.backward()
if grad_clip != 0:
nn.utils.clip_grad_norm(model.parameters(), grad_clip)
optimizer.step()
optimizer.zero_grad()
# acc = (score.max(1)[1] == labels).float().mean()
# sum_loss += loss
# sum_acc += acc
t1 = time.time()
avg_time.update((t1 - t0) / batch_size)
avg_loss.update(loss)
avg_acc.update(acc)
#log the info
if (i + 1) % log_iters == 0:
logger.info(
"epoch {}: {}/{} with loss is {:.5f} and acc is {:.3f}".
format(epoch + 1, i + 1, batch_num, avg_loss.avg,
avg_acc.avg))
lr = optimizer.state_dict()['param_groups'][0]['lr']
logger.info(
"end epochs {}/{} with lr: {:.5f} and avg_time is {:.3f} ms".
format(epoch + 1, epochs, lr, avg_time.avg * 1000))
global_avg_time.update(avg_time.avg)
# change the lr
# eval the model
if (epoch + 1) % eval_period == 0 or (epoch + 1) == epochs:
model.eval()
metrics = R1_mAP(num_query, use_gpu=use_gpu, feat_norm=feat_norm)
with torch.no_grad():
for vi, batch in enumerate(val_loader):
imgs, labels, camids = batch
if use_gpu:
imgs = imgs.to(device)
feats = model(imgs)
metrics.update((feats, labels, camids))
#compute cmc and mAP
cmc, mAP = metrics.compute()
logger.info("validation results at epoch:{}".format(epoch + 1))
logger.info("mAP:{:.2%}".format(mAP))
for r in [1, 5, 10]:
logger.info("CMC curve, Rank-{:<3}:{:.2%}".format(
r, cmc[r - 1]))
# determine whether cur model is the best
if mAP > best_mAP:
is_best = True
best_mAP = mAP
logger.info("Get a new best mAP")
if cmc[0] > best_r1:
is_best = True
best_r1 = cmc[0]
logger.info("Get a new best r1")
# add the result to sheet
if (epoch + 1) in check_epochs:
val = [avg_acc.avg, mAP, cmc[0], cmc[4], cmc[9]]
change = [format(v * 100, '.2f') for v in val]
change.append(format(avg_loss.avg, '.3f'))
values.extend(change)
# we hope that eval_period == ckpt_period or eval_period == k* ckpt_period where k is int
# whether to save the model
if (epoch + 1) % ckpt_period == 0 or is_best:
if parallel:
torch.save(
model.module.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
else:
torch.save(
model.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
logger.info("checkpoint {} saved !".format(epoch + 1))
if is_best:
if parallel:
torch.save(model.module.state_dict(),
ckpt_save_path + "best_ckpt.pth")
else:
torch.save(model.state_dict(),
ckpt_save_path + "best_ckpt.pth")
logger.info("best checkpoint was saved")
is_best = False
values.insert(1, format(global_avg_time.avg * 1000, '.2f'))
sheet.append(values)
wb.save(result_path)
logger.info("training is end, time for per imgs is {} ms".format(
global_avg_time.avg * 1000))
def train():
# 1、make dataloader
train_loader, val_loader, num_class = imagenet_make_data_loader(cfg)
#print("num_query:{},num_class:{}".format(num_query,num_class))
# 2、make model
model = build_model(cfg, num_class)
# 3、 make optimizer
optimizer = make_optimizer(cfg, model)
# 4、 make lr_scheduler
scheduler = make_lr_scheduler(cfg, optimizer)
# 5、 make loss_func
# directly use F.cross_entropy
# get paramters
log_period = cfg.OUTPUT.LOG_PERIOD
ckpt_period = cfg.OUTPUT.CHECKPOINT_PERIOD
eval_period = cfg.OUTPUT.EVAL_PERIOD
output_dir = cfg.OUTPUT.ROOT_DIR
device = cfg.MODEL.DEVICE
epochs = cfg.SOLVER.MAX_EPOCHS
use_gpu = device == "cuda"
# how many batch for each log
batch_size = cfg.SOLVER.IMGS_PER_BATCH
dataset = train_loader.dataset
batch_num = len(dataset) // batch_size
print("batch number: ", batch_num)
log_iters = batch_num // log_period
# print(log_iters)
# exit(1)
pretrained = cfg.MODEL.PRETRAIN_PATH != ''
parallel = cfg.MODEL.PARALLEL
ckpt_save_path = cfg.OUTPUT.ROOT_DIR + cfg.OUTPUT.CKPT_DIR
if not os.path.exists(ckpt_save_path):
os.makedirs(ckpt_save_path)
logger = logging.getLogger('MobileNetReID.train')
# count parameter
size = count_parameters(model)
logger.info("the param number of the model is {:.2f} M".format(size))
logger.info("Start training")
#count = 183, x, y = batch -> 11712 for train
if pretrained:
start_epoch = model.start_epoch
if parallel:
model = nn.DataParallel(model)
if use_gpu:
# model = nn.DataParallel(model)
model.to(device)
is_best = False
best_acc = 0.
# batch : img, pid, camid, img_path
avg_loss, avg_acc = RunningAverageMeter(), RunningAverageMeter()
avg_time, global_avg_time = AverageMeter(), AverageMeter()
global_avg_time.reset()
for epoch in range(epochs):
scheduler.step()
if pretrained and epoch < start_epoch - 1:
continue
model.train()
# sum_loss, sum_acc = 0., 0.
avg_loss.reset()
avg_acc.reset()
avg_time.reset()
for i, batch in enumerate(train_loader):
t0 = time.time()
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
scores = model(imgs)
loss = F.cross_entropy(scores, labels)
loss.backward()
optimizer.step()
optimizer.zero_grad()
acc = (scores.max(1)[1] == labels).float().mean()
t1 = time.time()
avg_time.update((t1 - t0) / batch_size)
avg_loss.update(loss)
avg_acc.update(acc)
#log the info
if (i + 1) % log_iters == 0:
logger.info(
"epoch {}: {}/{} with loss is {:.5f} and acc is {:.3f}".
format(epoch + 1, i + 1, batch_num, avg_loss.avg,
avg_acc.avg))
lr = optimizer.state_dict()['param_groups'][0]['lr']
logger.info(
"end epochs {}/{} with lr: {:.5f} and avg_time is {:.3f} ms".
format(epoch + 1, epochs, lr, avg_time.avg * 1000))
global_avg_time.update(avg_time.avg)
# change the lr
# eval the model
if (epoch + 1) % eval_period == 0 or (epoch + 1) == epochs:
model.eval()
val_acc = RunningAverageMeter()
with torch.no_grad():
for vi, batch in enumerate(val_loader):
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
scores = model(imgs)
acc = (scores.max(1)[1] == labels).float().mean()
val_acc.update(acc)
logger.info("validation results at epoch:{}".format(epoch + 1))
logger.info("acc:{:.2%}".format(val_acc.avg))
if val_acc.avg > best_acc:
logger.info("get a new best acc")
is_best = True
# we hope that eval_period == ckpt_period or eval_period == k* ckpt_period where k is int
# whether to save the model
if (epoch + 1) % ckpt_period == 0 or is_best:
if parallel:
torch.save(
model.module.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
else:
torch.save(
model.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
logger.info("checkpoint {} saved !".format(epoch + 1))
if is_best:
if parallel:
torch.save(model.module.state_dict(),
ckpt_save_path + "best_ckpt.pth")
else:
torch.save(model.state_dict(),
ckpt_save_path + "best_ckpt.pth")
logger.info("best checkpoint was saved")
is_best = False
logger.info("training is end, time for per imgs is {} ms".format(
global_avg_time.avg * 1000))
def train():
use_gpu = cfg.MODEL.DEVICE == "cuda"
# 1、make dataloader
train_loader, val_loader, test_loader, num_query, num_class = darts_make_data_loader(
cfg)
# print(num_query, num_class)
# 2、make model
model = CNetwork(num_class, cfg)
# tensor = torch.randn(2, 3, 256, 128)
# res = model(tensor)
# print(res[0].size()) [2, 751]
# 3、make optimizer
optimizer = make_optimizer(cfg, model)
# make architecture optimizer
arch_optimizer = torch.optim.Adam(
model._arch_parameters(),
lr=cfg.SOLVER.ARCH_LR,
betas=(0.5, 0.999),
weight_decay=cfg.SOLVER.ARCH_WEIGHT_DECAY)
# 4、make lr scheduler
lr_scheduler = make_lr_scheduler(cfg, optimizer)
# make lr scheduler
arch_lr_scheduler = torch.optim.lr_scheduler.MultiStepLR(
arch_optimizer, [80, 160], 0.1)
# 5、make loss
loss_fn = darts_make_loss(cfg)
# get parameters
device = cfg.MODEL.DEVICE
use_gpu = device == "cuda"
pretrained = cfg.MODEL.PRETRAINED != ""
log_period = cfg.OUTPUT.LOG_PERIOD
ckpt_period = cfg.OUTPUT.CKPT_PERIOD
eval_period = cfg.OUTPUT.EVAL_PERIOD
output_dir = cfg.OUTPUT.DIRS
ckpt_save_path = output_dir + cfg.OUTPUT.CKPT_DIRS
epochs = cfg.SOLVER.MAX_EPOCHS
batch_size = cfg.SOLVER.BATCH_SIZE
grad_clip = cfg.SOLVER.GRAD_CLIP
batch_num = len(train_loader)
log_iters = batch_num // log_period
if not os.path.exists(ckpt_save_path):
os.makedirs(ckpt_save_path)
# create *_result.xlsx
# save the result for analyze
name = (cfg.OUTPUT.LOG_NAME).split(".")[0] + ".xlsx"
result_path = cfg.OUTPUT.DIRS + name
wb = xl.Workbook()
sheet = wb.worksheets[0]
titles = [
'size/M', 'speed/ms', 'final_planes', 'acc', 'mAP', 'r1', 'r5', 'r10',
'loss', 'acc', 'mAP', 'r1', 'r5', 'r10', 'loss', 'acc', 'mAP', 'r1',
'r5', 'r10', 'loss'
]
sheet.append(titles)
check_epochs = [40, 80, 120, 160, 200, 240, 280, 320, 360, epochs]
values = []
logger = logging.getLogger("CNet_Search.train")
size = count_parameters(model)
values.append(format(size, '.2f'))
values.append(model.final_planes)
logger.info("the param number of the model is {:.2f} M".format(size))
logger.info("Starting Search CNetwork")
best_mAP, best_r1 = 0., 0.
is_best = False
avg_loss, avg_acc = RunningAverageMeter(), RunningAverageMeter()
avg_time, global_avg_time = AverageMeter(), AverageMeter()
if use_gpu:
model = model.to(device)
if pretrained:
logger.info("load self pretrained chekpoint to init")
model.load_pretrained_model(cfg.MODEL.PRETRAINED)
else:
logger.info("use kaiming init to init the model")
model.kaiming_init_()
for epoch in range(epochs):
lr_scheduler.step()
lr = lr_scheduler.get_lr()[0]
# architect lr.step
arch_lr_scheduler.step()
# if save epoch_num k, then run k+1 epoch next
if pretrained and epoch < model.start_epoch:
continue
# print(epoch)
# exit(1)
model.train()
avg_loss.reset()
avg_acc.reset()
avg_time.reset()
for i, batch in enumerate(train_loader):
t0 = time.time()
imgs, labels = batch
val_imgs, val_labels = next(iter(val_loader))
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
val_imgs = val_imgs.to(device)
val_labels = val_labels.to(device)
# 1、 update the weights
optimizer.zero_grad()
res = model(imgs)
# loss = loss_fn(scores, feats, labels)
loss, acc = compute_loss_acc(res, labels, loss_fn)
loss.backward()
if grad_clip != 0:
nn.utils.clip_grad_norm_(model.parameters(), grad_clip)
optimizer.step()
# 2、update the alpha
arch_optimizer.zero_grad()
res = model(val_imgs)
val_loss, val_acc = compute_loss_acc(res, val_labels, loss_fn)
val_loss.backward()
arch_optimizer.step()
# compute the acc
# acc = (scores.max(1)[1] == labels).float().mean()
t1 = time.time()
avg_time.update((t1 - t0) / batch_size)
avg_loss.update(loss)
avg_acc.update(acc)
# log info
if (i + 1) % log_iters == 0:
logger.info(
"epoch {}: {}/{} with loss is {:.5f} and acc is {:.3f}".
format(epoch + 1, i + 1, batch_num, avg_loss.avg,
avg_acc.avg))
logger.info(
"end epochs {}/{} with lr: {:.5f} and avg_time is: {:.3f} ms".
format(epoch + 1, epochs, lr, avg_time.avg * 1000))
global_avg_time.update(avg_time.avg)
# test the model
if (epoch + 1) % eval_period == 0:
model.eval()
metrics = R1_mAP(num_query, use_gpu=use_gpu)
with torch.no_grad():
for vi, batch in enumerate(test_loader):
# break
# print(len(batch))
imgs, labels, camids = batch
if use_gpu:
imgs = imgs.to(device)
feats = model(imgs)
metrics.update((feats, labels, camids))
#compute cmc and mAP
cmc, mAP = metrics.compute()
logger.info("validation results at epoch {}".format(epoch + 1))
logger.info("mAP:{:2%}".format(mAP))
for r in [1, 5, 10]:
logger.info("CMC curve, Rank-{:<3}:{:.2%}".format(
r, cmc[r - 1]))
# determine whether current model is the best
if mAP > best_mAP:
is_best = True
best_mAP = mAP
logger.info("Get a new best mAP")
if cmc[0] > best_r1:
is_best = True
best_r1 = cmc[0]
logger.info("Get a new best r1")
# add the result to sheet
if (epoch + 1) in check_epochs:
val = [avg_acc.avg, mAP, cmc[0], cmc[4], cmc[9]]
change = [format(v * 100, '.2f') for v in val]
change.append(format(avg_loss.avg, '.3f'))
values.extend(change)
# whether to save the model
if (epoch + 1) % ckpt_period == 0 or is_best:
torch.save(model.state_dict(),
ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
model._parse_genotype(file=ckpt_save_path +
"genotype_{}.json".format(epoch + 1))
logger.info("checkpoint {} was saved".format(epoch + 1))
if is_best:
torch.save(model.state_dict(),
ckpt_save_path + "best_ckpt.pth")
model._parse_genotype(file=ckpt_save_path +
"best_genotype.json")
logger.info("best_checkpoint was saved")
is_best = False
# exit(1)
values.insert(1, format(global_avg_time.avg * 1000, '.2f'))
sheet.append(values)
wb.save(result_path)
logger.info("Ending Search CNetwork")
def train():
# 1、make dataloader
# prepare train,val img_info list, elem is tuple;
train_loader, val_loader, num_query, num_class = make_data_loader(cfg)
# 2、make model
model = build_model(cfg, num_class)
# 3、 make optimizer
optimizer = make_optimizer(cfg, model)
# 4、 make lr_scheduler
scheduler = make_lr_scheduler(cfg, optimizer)
# 5、make loss
loss_fn = make_loss(cfg, num_class)
# get parameters
device = cfg.MODEL.DEVICE
use_gpu = device == "cuda"
pretrained = cfg.MODEL.PRETRAIN_PATH != ""
parallel = cfg.MODEL.PARALLEL
log_period = cfg.OUTPUT.LOG_PERIOD
ckpt_period = cfg.OUTPUT.CKPT_PERIOD
eval_period = cfg.OUTPUT.EVAL_PERIOD
output_dir = cfg.OUTPUT.DIRS
ckpt_save_path = output_dir + cfg.OUTPUT.CKPT_DIRS
epochs = cfg.SOLVER.MAX_EPOCHS
batch_size = cfg.SOLVER.BATCH_SIZE
grad_clip = cfg.SOLVER.GRAD_CLIP
batch_num = len(train_loader)
log_iters = batch_num // log_period
if not os.path.exists(ckpt_save_path):
os.makedirs(ckpt_save_path)
# create *_result.xlsx
# save the result for analyze
name = (cfg.OUTPUT.LOG_NAME).split(".")[0] + ".xlsx"
result_path = cfg.OUTPUT.DIRS + name
wb = xl.Workbook()
sheet = wb.worksheets[0]
titles = ['size/M','speed/ms','final_planes', 'acc', 'mAP', 'r1', 'r5', 'r10', 'loss',
'acc', 'mAP', 'r1', 'r5', 'r10', 'loss','acc', 'mAP', 'r1', 'r5', 'r10', 'loss']
sheet.append(titles)
check_epochs = [40, 80, 120, 160, 200, 240, 280, 320, 360, epochs]
values = []
logger = logging.getLogger("CDNet.train")
size = count_parameters(model)
values.append(format(size, '.2f'))
values.append(model.final_planes)
logger.info("the param number of the model is {:.2f} M".format(size))
infer_size = infer_count_parameters(model)
logger.info("the infer param number of the model is {:.2f}M".format(infer_size))
shape = [1, 3]
shape.extend(cfg.DATA.IMAGE_SIZE)
# if cfg.MODEL.NAME == 'cdnet' :
# infer_model = CDNetwork(num_class, cfg)
# elif cfg.MODEL.NAME == 'cnet':
# infer_model = CNetwork(num_class, cfg)
# else:
# infer_model = model
# for scaling experiment
flops, _ = get_model_infos(model, shape)
logger.info("the total flops number of the model is {:.2f} M".format(flops))
logger.info("Starting Training CDNetwork")
best_mAP, best_r1 = 0., 0.
is_best = False
avg_loss, avg_acc = RunningAverageMeter(),RunningAverageMeter()
avg_time, global_avg_time = AverageMeter(), AverageMeter()
if parallel:
model = nn.DataParallel(model)
if use_gpu:
model = model.to(device)
for epoch in range(epochs):
scheduler.step()
lr = scheduler.get_lr()[0]
# if save epoch_num k, then run k+1 epoch next
if pretrained and epoch < model.start_epoch:
continue
# rest the record
model.train()
avg_loss.reset()
avg_acc.reset()
avg_time.reset()
for i, batch in enumerate(train_loader):
t0 = time.time()
imgs, labels = batch
if use_gpu:
imgs = imgs.to(device)
labels = labels.to(device)
res = model(imgs)
loss, acc = compute_loss_acc(res, labels, loss_fn)
loss.backward()
if grad_clip != 0:
nn.utils.clip_grad_norm_(model.parameters(), grad_clip)
optimizer.step()
optimizer.zero_grad()
t1 = time.time()
avg_time.update((t1 - t0) / batch_size)
avg_loss.update(loss)
avg_acc.update(acc)
# log info
if (i+1) % log_iters == 0:
logger.info("epoch {}: {}/{} with loss is {:.5f} and acc is {:.3f}".format(
epoch+1, i+1, batch_num, avg_loss.avg, avg_acc.avg))
logger.info("end epochs {}/{} with lr: {:.5f} and avg_time is: {:.3f} ms".format(epoch+1, epochs, lr, avg_time.avg * 1000))
global_avg_time.update(avg_time.avg)
# test the model
if (epoch + 1) % eval_period == 0 or (epoch + 1) in check_epochs:
model.eval()
metrics = R1_mAP(num_query, use_gpu = use_gpu)
with torch.no_grad():
for vi, batch in enumerate(val_loader):
imgs, labels, camids = batch
if use_gpu:
imgs = imgs.to(device)
feats = model(imgs)
metrics.update((feats, labels, camids))
#compute cmc and mAP
cmc, mAP = metrics.compute()
logger.info("validation results at epoch {}".format(epoch + 1))
logger.info("mAP:{:2%}".format(mAP))
for r in [1,5,10]:
logger.info("CMC curve, Rank-{:<3}:{:.2%}".format(r, cmc[r-1]))
# determine whether current model is the best
if mAP > best_mAP:
is_best = True
best_mAP = mAP
logger.info("Get a new best mAP")
if cmc[0] > best_r1:
is_best = True
best_r1 = cmc[0]
logger.info("Get a new best r1")
# add the result to sheet
if (epoch + 1) in check_epochs:
val = [avg_acc.avg, mAP, cmc[0], cmc[4], cmc[9]]
change = [format(v * 100, '.2f') for v in val]
change.append(format(avg_loss.avg, '.3f'))
values.extend(change)
# whether to save the model
if (epoch + 1) % ckpt_period == 0 or is_best:
torch.save(model.state_dict(), ckpt_save_path + "checkpoint_{}.pth".format(epoch + 1))
logger.info("checkpoint {} was saved".format(epoch + 1))
if is_best:
torch.save(model.state_dict(), ckpt_save_path + "best_ckpt.pth")
logger.info("best_checkpoint was saved")
is_best = False
values.insert(1, format(global_avg_time.avg * 1000, '.2f'))
values.append(format(infer_size, '.2f'))
sheet.append(values)
wb.save(result_path)
logger.info("best_mAP:{:.2%}, best_r1:{:.2%}".format(best_mAP, best_r1))
logger.info("Ending training CDNetwork")
