-
Notifications
You must be signed in to change notification settings - Fork 0
/
train_cifar10.py
610 lines (522 loc) · 24.3 KB
/
train_cifar10.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
import argparse
import logging
import sys
import time
import math
from tqdm import tqdm
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.autograd import Variable
import os
from wideresnet import WideResNet
from preactresnet import PreActResNet18
from utils import *
from utils_awp import AdvWeightPerturb
from auto_adv import AutoXAdv
mu = torch.tensor(cifar10_mean).view(3, 1, 1).cuda()
std = torch.tensor(cifar10_std).view(3, 1, 1).cuda()
def normalize(X):
return (X - mu)/std
upper_limit, lower_limit = 1,0
def clamp(X, lower_limit, upper_limit):
return torch.max(torch.min(X, upper_limit), lower_limit)
class Batches():
def __init__(self, dataset, batch_size, shuffle, set_random_choices=False, num_workers=0, drop_last=False):
self.dataset = dataset
self.batch_size = batch_size
self.set_random_choices = set_random_choices
self.dataloader = torch.utils.data.DataLoader(
dataset, batch_size=batch_size, num_workers=num_workers, pin_memory=True, shuffle=shuffle, drop_last=drop_last
)
def __iter__(self):
if self.set_random_choices:
self.dataset.set_random_choices()
return ({'input': x.to(device).float(), 'target': y.to(device).long()} for (x,y) in self.dataloader)
def __len__(self):
return len(self.dataloader)
class MART(nn.Module):
def __init__(self, beta):
super(MART, self).__init__()
self.beta = beta
def forward(self, adv_logits, natural_logits, target):
# Based on the repo MART https://github.com/YisenWang/MART
beta = self.beta
kl = nn.KLDivLoss(reduction='none')
batch_size = len(target)
adv_probs = F.softmax(adv_logits, dim=1)
tmp1 = torch.argsort(adv_probs, dim=1)[:, -2:]
new_y = torch.where(tmp1[:, -1] == target, tmp1[:, -2], tmp1[:, -1])
loss_adv = F.cross_entropy(adv_logits, target) + F.nll_loss(torch.log(1.0001 - adv_probs + 1e-12), new_y)
nat_probs = F.softmax(natural_logits, dim=1)
true_probs = torch.gather(nat_probs, 1, (target.unsqueeze(1)).long()).squeeze()
loss_robust = (1.0 / batch_size) * torch.sum(
torch.sum(kl(torch.log(adv_probs + 1e-12), nat_probs), dim=1) * (1.0000001 - true_probs))
loss = loss_adv + float(beta) * loss_robust
return loss
class TRADES(nn.Module):
def __init__(self, beta):
super(TRADES, self).__init__()
self.beta = beta
def forward(self, adv_logits, natural_logits, target):
beta = self.beta
# Based on the repo TREADES: https://github.com/yaodongyu/TRADES
batch_size = len(target)
criterion_kl = nn.KLDivLoss(size_average=False).cuda()
loss_natural = nn.CrossEntropyLoss(reduction='mean')(natural_logits, target)
loss_robust = (1.0 / batch_size) * criterion_kl(F.log_softmax(adv_logits, dim=1),
F.softmax(natural_logits, dim=1))
loss = loss_natural + beta * loss_robust
return loss
class CE(nn.Module):
def __init__(self):
self.loss = nn.CrossEntropyLoss()
def forward(self, adv_logits, natural_logits, target):
return self.loss(adv_logits, target)
def mixup_data(x, y, alpha=1.0):
'''Returns mixed inputs, pairs of targets, and lambda'''
if alpha > 0:
lam = np.random.beta(alpha, alpha)
else:
lam = 1
batch_size = x.size()[0]
index = torch.randperm(batch_size).cuda()
mixed_x = lam * x + (1 - lam) * x[index, :]
y_a, y_b = y, y[index]
return mixed_x, y_a, y_b, lam
def mixup_criterion(criterion, pred, y_a, y_b, lam):
return lam * criterion(pred, y_a) + (1 - lam) * criterion(pred, y_b)
class PlainLogger:
def __init__(self,log_path):
self.path = log_path
with open(self.path, 'a+') as f:
print(
time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())),
file=f,
flush=True
)
print(
'****************开始记录*********************',
file=f,
flush=True
)
def __call__(self,*content, end='\n'):
print(*content, end=end)
with open(self.path, 'a+') as f:
print(
*content,
file=f,
flush=True,
end=end
)
def clean(self):
with open(self.path, 'a+') as f:
print(
time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time())),
file=f,
flush=True
)
print(
'****************开始记录*********************',
file=f,
flush=True
)
def attack_pgd(model, X, y, epsilon, alpha, attack_iters, restarts,
norm, early_stop=False,
mixup=False, y_a=None, y_b=None, lam=None):
max_loss = torch.zeros(y.shape[0]).cuda()
max_delta = torch.zeros_like(X).cuda()
for _ in range(restarts):
delta = torch.zeros_like(X).cuda()
if norm == "l_inf":
delta.uniform_(-epsilon, epsilon)
elif norm == "l_2":
delta.normal_()
d_flat = delta.view(delta.size(0),-1)
n = d_flat.norm(p=2,dim=1).view(delta.size(0),1,1,1)
r = torch.zeros_like(n).uniform_(0, 1)
delta *= r/n*epsilon
else:
raise ValueError
delta = clamp(delta, lower_limit-X, upper_limit-X)
delta.requires_grad = True
for _ in range(attack_iters):
output = model(normalize(X + delta))
if early_stop:
index = torch.where(output.max(1)[1] == y)[0]
else:
index = slice(None,None,None)
if not isinstance(index, slice) and len(index) == 0:
break
if mixup:
criterion = nn.CrossEntropyLoss()
loss = mixup_criterion(criterion, model(normalize(X+delta)), y_a, y_b, lam)
else:
loss = F.cross_entropy(output, y)
loss.backward()
grad = delta.grad.detach()
d = delta[index, :, :, :]
g = grad[index, :, :, :]
x = X[index, :, :, :]
if norm == "l_inf":
d = torch.clamp(d + alpha * torch.sign(g), min=-epsilon, max=epsilon)
elif norm == "l_2":
g_norm = torch.norm(g.view(g.shape[0],-1),dim=1).view(-1,1,1,1)
scaled_g = g/(g_norm + 1e-10)
d = (d + scaled_g*alpha).view(d.size(0),-1).renorm(p=2,dim=0,maxnorm=epsilon).view_as(d)
d = clamp(d, lower_limit - x, upper_limit - x)
delta.data[index, :, :, :] = d
delta.grad.zero_()
if mixup:
criterion = nn.CrossEntropyLoss(reduction='none')
all_loss = mixup_criterion(criterion, model(normalize(X+delta)), y_a, y_b, lam)
else:
all_loss = F.cross_entropy(model(normalize(X+delta)), y, reduction='none')
max_delta[all_loss >= max_loss] = delta.detach()[all_loss >= max_loss]
max_loss = torch.max(max_loss, all_loss)
return max_delta
def get_args():
parser = argparse.ArgumentParser()
parser.add_argument('--model', default='WideResNet')
parser.add_argument('--l2', default=0, type=float)
parser.add_argument('--l1', default=0, type=float)
parser.add_argument('--batch-size', default=128, type=int)
parser.add_argument('--batch-size-test', default=128, type=int)
parser.add_argument('--data-dir', default='../cifar-data', type=str)
parser.add_argument('--epochs', default=200, type=int)
parser.add_argument('--lr-schedule', default='piecewise', choices=['superconverge', 'piecewise', 'linear', 'piecewisesmoothed', 'piecewisezoom', 'onedrop', 'multipledecay', 'cosine', 'cyclic'])
parser.add_argument('--lr-max', default=0.1, type=float)
parser.add_argument('--lr-one-drop', default=0.01, type=float)
parser.add_argument('--lr-drop-epoch', default=100, type=int)
parser.add_argument('--attack', default='auto', type=str, choices=['pgd', 'fgsm', 'free', 'none', 'auto'])
parser.add_argument('--epsilon', default=8, type=int)
parser.add_argument('--attack-iters', default=10, type=int)
parser.add_argument('--attack-iters-test', default=20, type=int)
parser.add_argument('--restarts', default=1, type=int)
parser.add_argument('--pgd-alpha', default=2, type=float)
parser.add_argument('--fgsm-alpha', default=1.25, type=float)
parser.add_argument('--norm', default='l_inf', type=str, choices=['l_inf', 'l_2'])
parser.add_argument('--fgsm-init', default='random', choices=['zero', 'random', 'previous'])
parser.add_argument('--fname', default='cifar_model', type=str)
parser.add_argument('--seed', default=0, type=int)
parser.add_argument('--half', action='store_true')
parser.add_argument('--width-factor', default=10, type=int)
parser.add_argument('--resume', default=0, type=int)
parser.add_argument('--cutout', action='store_true')
parser.add_argument('--cutout-len', type=int)
parser.add_argument('--mixup', action='store_true')
parser.add_argument('--mixup-alpha', type=float)
parser.add_argument('--eval', action='store_true')
parser.add_argument('--val', action='store_true')
parser.add_argument('--chkpt-iters', default=10, type=int)
parser.add_argument('--awp-gamma', default=0.01, type=float)
parser.add_argument('--awp-warmup', default=-1, type=int)
parser.add_argument('--devices', type=str, default="0")
parser.add_argument('--loss', type=str, default="", choices=["", "trades", "mart"])
return parser.parse_args()
def main():
args = get_args()
if args.awp_gamma <= 0.0:
args.awp_warmup = np.infty
os.environ['CUDA_VISIBLE_DEVICES'] = args.devices
if not os.path.exists(args.fname):
os.makedirs(args.fname)
logger = logging.getLogger(__name__)
logging.basicConfig(
format='[%(asctime)s] - %(message)s',
datefmt='%Y/%m/%d %H:%M:%S',
level=logging.DEBUG,
handlers=[
logging.FileHandler(os.path.join(args.fname, 'eval.log' if args.eval else 'output.log')),
logging.StreamHandler()
])
logger.info(args)
np.random.seed(args.seed)
torch.manual_seed(args.seed)
torch.cuda.manual_seed(args.seed)
transforms = [Crop(32, 32), FlipLR()]
if args.cutout:
transforms.append(Cutout(args.cutout_len, args.cutout_len))
if args.val:
try:
dataset = torch.load("cifar10_validation_split.pth")
except:
print("Couldn't find a dataset with a validation split, did you run "
"generate_validation.py?")
return
val_set = list(zip(transpose(dataset['val']['data']/255.), dataset['val']['labels']))
val_batches = Batches(val_set, args.batch_size, shuffle=False, num_workers=2)
else:
dataset = cifar10(args.data_dir)
train_set = list(zip(transpose(pad(dataset['train']['data'], 4)/255.),
dataset['train']['labels']))
train_set_x = Transform(train_set, transforms)
train_batches = Batches(train_set_x, args.batch_size, shuffle=True, set_random_choices=True, num_workers=2)
test_set = list(zip(transpose(dataset['test']['data']/255.), dataset['test']['labels']))
test_batches = Batches(test_set, args.batch_size_test, shuffle=False, num_workers=2)
epsilon = (args.epsilon / 255.)
pgd_alpha = (args.pgd_alpha / 255.)
if args.model == 'PreActResNet18':
model = PreActResNet18()
proxy = PreActResNet18()
elif args.model == 'WideResNet':
model = WideResNet(34, 10, widen_factor=args.width_factor, dropRate=0.0)
proxy = WideResNet(34, 10, widen_factor=args.width_factor, dropRate=0.0)
else:
raise ValueError("Unknown model")
model = nn.DataParallel(model).cuda()
proxy = nn.DataParallel(proxy).cuda()
if args.l2:
decay, no_decay = [], []
for name,param in model.named_parameters():
if 'bn' not in name and 'bias' not in name:
decay.append(param)
else:
no_decay.append(param)
params = [{'params':decay, 'weight_decay':args.l2},
{'params':no_decay, 'weight_decay': 0 }]
else:
params = model.parameters()
opt = torch.optim.SGD(params, lr=args.lr_max, momentum=0.9, weight_decay=5e-4)
proxy_opt = torch.optim.SGD(proxy.parameters(), lr=0.01)
awp_adversary = AdvWeightPerturb(model=model, proxy=proxy, proxy_optim=proxy_opt, gamma=args.awp_gamma)
criterion = nn.CrossEntropyLoss()
if args.loss == "trades":
robust_criterion = TRADES(beta=6.0)
elif args.loss == "mart":
robust_criterion = MART(beta=6.0)
else:
robust_criterion = CE()
if args.attack == 'free':
delta = torch.zeros(args.batch_size, 3, 32, 32).cuda()
delta.requires_grad = True
elif args.attack == 'fgsm' and args.fgsm_init == 'previous':
delta = torch.zeros(args.batch_size, 3, 32, 32).cuda()
delta.requires_grad = True
if args.attack == 'free':
epochs = int(math.ceil(args.epochs / args.attack_iters))
else:
epochs = args.epochs
if args.lr_schedule == 'superconverge':
lr_schedule = lambda t: np.interp([t], [0, args.epochs * 2 // 5, args.epochs], [0, args.lr_max, 0])[0]
elif args.lr_schedule == 'piecewise':
def lr_schedule(t):
if t / args.epochs < 0.5:
return args.lr_max
elif t / args.epochs < 0.75:
return args.lr_max / 10.
else:
return args.lr_max / 100.
elif args.lr_schedule == 'linear':
lr_schedule = lambda t: np.interp([t], [0, args.epochs // 3, args.epochs * 2 // 3, args.epochs], [args.lr_max, args.lr_max, args.lr_max / 10, args.lr_max / 100])[0]
elif args.lr_schedule == 'onedrop':
def lr_schedule(t):
if t < args.lr_drop_epoch:
return args.lr_max
else:
return args.lr_one_drop
elif args.lr_schedule == 'multipledecay':
def lr_schedule(t):
return args.lr_max - (t//(args.epochs//10))*(args.lr_max/10)
elif args.lr_schedule == 'cosine':
def lr_schedule(t):
return args.lr_max * 0.5 * (1 + np.cos(t / args.epochs * np.pi))
elif args.lr_schedule == 'cyclic':
lr_schedule = lambda t: np.interp([t], [0, 0.4 * args.epochs, args.epochs], [0, args.lr_max, 0])[0]
best_test_robust_acc = 0
best_val_robust_acc = 0
if args.resume:
start_epoch = args.resume
model.load_state_dict(torch.load(os.path.join(args.fname, f'model_{start_epoch-1}.pth')))
opt.load_state_dict(torch.load(os.path.join(args.fname, f'opt_{start_epoch-1}.pth')))
logger.info(f'Resuming at epoch {start_epoch}')
if os.path.exists(os.path.join(args.fname, f'model_best.pth')):
best_test_robust_acc = torch.load(os.path.join(args.fname, f'model_best.pth'))['test_robust_acc']
if args.val:
best_val_robust_acc = torch.load(os.path.join(args.fname, f'model_val.pth'))['val_robust_acc']
else:
start_epoch = 0
if args.eval:
if not args.resume:
logger.info("No model loaded to evaluate, specify with --resume FNAME")
return
logger.info("[Evaluation mode]")
logger_test = PlainLogger(os.path.join('./', f'cifar10-{args.model}-{args.attack_iters}-{epsilon}.txt'))
global mu, std
attacker = AutoXAdv(
3 * 32 * 32, 64, nn.CrossEntropyLoss(reduction='mean').cuda(),
mu, std,
n_steps=args.attack_iters, eps=epsilon,
log=logger_test
).cuda()
attacker.optimizer = torch.optim.AdamW(attacker.parameters(), lr=1e-3)
logger.info('Epoch \t Train Time \t Test Time \t LR \t \t Train Loss \t Train Acc \t Train Robust Loss \t Train Robust Acc \t Test Loss \t Test Acc \t Test Robust Loss \t Test Robust Acc')
n_batches = len(train_batches)
for epoch in range(start_epoch, epochs):
model.train()
start_time = time.time()
train_loss = 0
train_acc = 0
train_robust_loss = 0
train_robust_acc = 0
train_n = 0
attacker.on_epoch_start()
for i, batch in tqdm(enumerate(train_batches), desc=f"Epoch {epoch}:\t", total=n_batches):
if args.eval:
break
X, y = batch['input'], batch['target']
if args.mixup:
X, y_a, y_b, lam = mixup_data(X, y, args.mixup_alpha)
X, y_a, y_b = map(Variable, (X, y_a, y_b))
lr = lr_schedule(epoch + (i + 1) / len(train_batches))
opt.param_groups[0].update(lr=lr)
if args.attack == 'pgd':
# Random initialization
if args.mixup:
delta = attack_pgd(model, X, y, epsilon, pgd_alpha, args.attack_iters, args.restarts, args.norm, mixup=True, y_a=y_a, y_b=y_b, lam=lam)
else:
delta = attack_pgd(model, X, y, epsilon, pgd_alpha, args.attack_iters, args.restarts, args.norm)
delta = delta.detach()
elif args.attack == 'fgsm':
delta = attack_pgd(model, X, y, epsilon, args.fgsm_alpha*epsilon, 1, 1, args.norm)
# Standard training
elif args.attack == 'none':
delta = torch.zeros_like(X)
elif args.attack == 'auto':
opt.zero_grad()
# model.eval()
delta = attacker.optimize(
model, X, y,
)
model.train()
X_adv = normalize(torch.clamp(X + delta[:X.size(0)], min=lower_limit, max=upper_limit))
opt.zero_grad()
attacker.zero_grad()
model.train()
# calculate adversarial weight perturbation and perturb it
if epoch >= args.awp_warmup:
# not compatible to mixup currently.
assert (not args.mixup)
awp = awp_adversary.calc_awp(inputs_adv=X_adv,
targets=y)
awp_adversary.perturb(awp)
natural_output = model(normalize(X))
robust_output = model(X_adv)
if args.mixup:
robust_loss = mixup_criterion(criterion, robust_output, y_a, y_b, lam)
else:
robust_loss = robust_criterion(robust_output, natural_output, y)
if args.l1:
for name,param in model.named_parameters():
if 'bn' not in name and 'bias' not in name:
robust_loss += args.l1*param.abs().sum()
opt.zero_grad()
robust_loss.backward()
opt.step()
attacker.optimize_step()
if epoch >= args.awp_warmup:
awp_adversary.restore(awp)
output = model(normalize(X))
if args.mixup:
loss = mixup_criterion(criterion, output, y_a, y_b, lam)
else:
loss = criterion(output, y)
train_robust_loss += robust_loss.item() * y.size(0)
train_robust_acc += (robust_output.max(1)[1] == y).sum().item()
train_loss += loss.item() * y.size(0)
train_acc += (output.max(1)[1] == y).sum().item()
train_n += y.size(0)
train_time = time.time()
attacker.on_epoch_end()
model.eval()
test_loss = 0
test_acc = 0
test_robust_loss = 0
test_robust_acc = 0
test_n = 0
for i, batch in enumerate(test_batches):
X, y = batch['input'], batch['target']
# Random initialization
if args.attack == 'none':
delta = torch.zeros_like(X)
else:
delta = attack_pgd(model, X, y, epsilon, pgd_alpha, args.attack_iters_test, args.restarts, args.norm, early_stop=args.eval)
delta = delta.detach()
natural_output = model(normalize(X))
robust_output = model(normalize(torch.clamp(X + delta[:X.size(0)], min=lower_limit, max=upper_limit)))
robust_loss = robust_criterion(robust_output, natural_output, y)
output = model(normalize(X))
loss = criterion(output, y)
test_robust_loss += robust_loss.item() * y.size(0)
test_robust_acc += (robust_output.max(1)[1] == y).sum().item()
test_loss += loss.item() * y.size(0)
test_acc += (output.max(1)[1] == y).sum().item()
test_n += y.size(0)
test_time = time.time()
if args.val:
val_loss = 0
val_acc = 0
val_robust_loss = 0
val_robust_acc = 0
val_n = 0
for i, batch in enumerate(val_batches):
X, y = batch['input'], batch['target']
# Random initialization
if args.attack == 'none':
delta = torch.zeros_like(X)
else:
delta = attack_pgd(model, X, y, epsilon, pgd_alpha, args.attack_iters_test, args.restarts, args.norm, early_stop=args.eval)
delta = delta.detach()
output = model(normalize(X))
robust_output = model(normalize(torch.clamp(X + delta[:X.size(0)], min=lower_limit, max=upper_limit)))
robust_loss = robust_criterion(robust_output, output, y)
loss = criterion(output, y)
val_robust_loss += robust_loss.item() * y.size(0)
val_robust_acc += (robust_output.max(1)[1] == y).sum().item()
val_loss += loss.item() * y.size(0)
val_acc += (output.max(1)[1] == y).sum().item()
val_n += y.size(0)
if not args.eval:
logger.info('%d \t %.1f \t \t %.1f \t \t %.4f \t %.4f \t %.4f \t %.4f \t \t %.4f \t \t %.4f \t %.4f \t %.4f \t \t %.4f',
epoch, train_time - start_time, test_time - train_time, lr,
train_loss/train_n, train_acc/train_n, train_robust_loss/train_n, train_robust_acc/train_n,
test_loss/test_n, test_acc/test_n, test_robust_loss/test_n, test_robust_acc/test_n)
if args.val:
logger.info('validation %.4f \t %.4f \t %.4f \t %.4f',
val_loss/val_n, val_acc/val_n, val_robust_loss/val_n, val_robust_acc/val_n)
if val_robust_acc/val_n > best_val_robust_acc:
torch.save({
'state_dict':model.state_dict(),
'test_robust_acc':test_robust_acc/test_n,
'test_robust_loss':test_robust_loss/test_n,
'test_loss':test_loss/test_n,
'test_acc':test_acc/test_n,
'val_robust_acc':val_robust_acc/val_n,
'val_robust_loss':val_robust_loss/val_n,
'val_loss':val_loss/val_n,
'val_acc':val_acc/val_n,
}, os.path.join(args.fname, f'model_val.pth'))
best_val_robust_acc = val_robust_acc/val_n
# save checkpoint
if (epoch+1) % args.chkpt_iters == 0 or epoch+1 == epochs:
torch.save(model.state_dict(), os.path.join(args.fname, f'model_{epoch}.pth'))
torch.save(opt.state_dict(), os.path.join(args.fname, f'opt_{epoch}.pth'))
# save best
if test_robust_acc/test_n > best_test_robust_acc:
torch.save({
'state_dict':model.state_dict(),
'test_robust_acc':test_robust_acc/test_n,
'test_robust_loss':test_robust_loss/test_n,
'test_loss':test_loss/test_n,
'test_acc':test_acc/test_n,
}, os.path.join(args.fname, f'model_best.pth'))
best_test_robust_acc = test_robust_acc/test_n
else:
logger.info('%d \t %.1f \t \t %.1f \t \t %.4f \t %.4f \t %.4f \t %.4f \t \t %.4f \t \t %.4f \t %.4f \t %.4f \t \t %.4f',
epoch, train_time - start_time, test_time - train_time, -1,
-1, -1, -1, -1,
test_loss/test_n, test_acc/test_n, test_robust_loss/test_n, test_robust_acc/test_n)
return
if __name__ == "__main__":
main()