This repository has been archived by the owner on Aug 19, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 3
/
utils.py
467 lines (389 loc) · 15.5 KB
/
utils.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
# Copyright (c) Meta Platforms, Inc. and affiliates.
import copy
import datetime
import errno
import hashlib
import os
import time
from collections import defaultdict, deque, OrderedDict
from typing import List, Optional, Tuple
import torch
import torch.distributed as dist
class SmoothedValue:
"""Track a series of values and provide access to smoothed values over a
window or the global series average.
"""
def __init__(self, window_size=20, fmt=None):
if fmt is None:
fmt = "{median:.4f} ({global_avg:.4f})"
self.deque = deque(maxlen=window_size)
self.total = 0.0
self.count = 0
self.fmt = fmt
def update(self, value, n=1):
self.deque.append(value)
self.count += n
self.total += value * n
def synchronize_between_processes(self):
"""
Warning: does not synchronize the deque!
"""
t = reduce_across_processes([self.count, self.total])
t = t.tolist()
self.count = int(t[0])
self.total = t[1]
@property
def median(self):
d = torch.tensor(list(self.deque))
return d.median().item()
@property
def avg(self):
d = torch.tensor(list(self.deque), dtype=torch.float32)
return d.mean().item()
@property
def global_avg(self):
return self.total / self.count
@property
def max(self):
return max(self.deque)
@property
def value(self):
return self.deque[-1]
def __str__(self):
return self.fmt.format(
median=self.median, avg=self.avg, global_avg=self.global_avg, max=self.max, value=self.value
)
class MetricLogger:
def __init__(self, delimiter="\t"):
self.meters = defaultdict(SmoothedValue)
self.delimiter = delimiter
def update(self, **kwargs):
for k, v in kwargs.items():
if isinstance(v, torch.Tensor):
v = v.item()
assert isinstance(v, (float, int))
self.meters[k].update(v)
def __getattr__(self, attr):
if attr in self.meters:
return self.meters[attr]
if attr in self.__dict__:
return self.__dict__[attr]
raise AttributeError(f"'{type(self).__name__}' object has no attribute '{attr}'")
def __str__(self):
loss_str = []
for name, meter in self.meters.items():
loss_str.append(f"{name}: {str(meter)}")
return self.delimiter.join(loss_str)
def synchronize_between_processes(self):
for meter in self.meters.values():
meter.synchronize_between_processes()
def add_meter(self, name, meter):
self.meters[name] = meter
def log_every(self, iterable, print_freq, header=None):
i = 0
if not header:
header = ""
start_time = time.time()
end = time.time()
iter_time = SmoothedValue(fmt="{avg:.4f}")
data_time = SmoothedValue(fmt="{avg:.4f}")
space_fmt = ":" + str(len(str(len(iterable)))) + "d"
if torch.cuda.is_available():
log_msg = self.delimiter.join(
[
header,
"[{0" + space_fmt + "}/{1}]",
"eta: {eta}",
"{meters}",
"time: {time}",
"data: {data}",
"max mem: {memory:.0f}",
]
)
else:
log_msg = self.delimiter.join(
[header, "[{0" + space_fmt + "}/{1}]", "eta: {eta}", "{meters}", "time: {time}", "data: {data}"]
)
MB = 1024.0 * 1024.0
for obj in iterable:
data_time.update(time.time() - end)
yield obj
iter_time.update(time.time() - end)
if i % print_freq == 0:
eta_seconds = iter_time.global_avg * (len(iterable) - i)
eta_string = str(datetime.timedelta(seconds=int(eta_seconds)))
if torch.cuda.is_available():
print(
log_msg.format(
i,
len(iterable),
eta=eta_string,
meters=str(self),
time=str(iter_time),
data=str(data_time),
memory=torch.cuda.max_memory_allocated() / MB,
)
)
else:
print(
log_msg.format(
i, len(iterable), eta=eta_string, meters=str(self), time=str(iter_time), data=str(data_time)
)
)
i += 1
end = time.time()
total_time = time.time() - start_time
total_time_str = str(datetime.timedelta(seconds=int(total_time)))
print(f"{header} Total time: {total_time_str}")
class ExponentialMovingAverage(torch.optim.swa_utils.AveragedModel):
"""Maintains moving averages of model parameters using an exponential decay.
``ema_avg = decay * avg_model_param + (1 - decay) * model_param``
`torch.optim.swa_utils.AveragedModel <https://pytorch.org/docs/stable/optim.html#custom-averaging-strategies>`_
is used to compute the EMA.
"""
def __init__(self, model, decay, device="cpu"):
def ema_avg(avg_model_param, model_param, num_averaged):
return decay * avg_model_param + (1 - decay) * model_param
super().__init__(model, device, ema_avg, use_buffers=True)
def accuracy(output, target, topk=(1,)):
"""Computes the accuracy over the k top predictions for the specified values of k"""
with torch.inference_mode():
maxk = max(topk)
batch_size = target.size(0)
if target.ndim == 2:
target = target.max(dim=1)[1]
_, pred = output.topk(maxk, 1, True, True)
pred = pred.t()
correct = pred.eq(target[None])
res = []
for k in topk:
correct_k = correct[:k].flatten().sum(dtype=torch.float32)
res.append(correct_k * (100.0 / batch_size))
return res
def mkdir(path):
try:
os.makedirs(path)
except OSError as e:
if e.errno != errno.EEXIST:
raise
def setup_for_distributed(is_master):
"""
This function disables printing when not in master process
"""
import builtins as __builtin__
builtin_print = __builtin__.print
def print(*args, **kwargs):
force = kwargs.pop("force", False)
if is_master or force:
builtin_print(*args, **kwargs)
__builtin__.print = print
def is_dist_avail_and_initialized():
if not dist.is_available():
return False
if not dist.is_initialized():
return False
return True
def get_world_size():
if not is_dist_avail_and_initialized():
return 1
return dist.get_world_size()
def get_rank():
if not is_dist_avail_and_initialized():
return 0
return dist.get_rank()
def is_main_process():
return get_rank() == 0
def save_on_master(*args, **kwargs):
if is_main_process():
torch.save(*args, **kwargs)
def init_distributed_mode(args):
if "RANK" in os.environ and "WORLD_SIZE" in os.environ:
args.rank = int(os.environ["RANK"])
args.world_size = int(os.environ["WORLD_SIZE"])
args.gpu = int(os.environ["LOCAL_RANK"])
elif "SLURM_PROCID" in os.environ:
args.rank = int(os.environ["SLURM_PROCID"])
args.gpu = args.rank % torch.cuda.device_count()
elif hasattr(args, "rank"):
pass
else:
print("Not using distributed mode")
args.distributed = False
return
args.distributed = True
torch.cuda.set_device(args.gpu)
args.dist_backend = "nccl"
print(f"| distributed init (rank {args.rank}): {args.dist_url}", flush=True)
torch.distributed.init_process_group(
backend=args.dist_backend, init_method=args.dist_url, world_size=args.world_size, rank=args.rank
)
torch.distributed.barrier()
setup_for_distributed(args.rank == 0)
def average_checkpoints(inputs):
"""Loads checkpoints from inputs and returns a model with averaged weights. Original implementation taken from:
https://github.com/pytorch/fairseq/blob/a48f235636557b8d3bc4922a6fa90f3a0fa57955/scripts/average_checkpoints.py#L16
Args:
inputs (List[str]): An iterable of string paths of checkpoints to load from.
Returns:
A dict of string keys mapping to various values. The 'model' key
from the returned dict should correspond to an OrderedDict mapping
string parameter names to torch Tensors.
"""
params_dict = OrderedDict()
params_keys = None
new_state = None
num_models = len(inputs)
for fpath in inputs:
with open(fpath, "rb") as f:
state = torch.load(
f,
map_location=(lambda s, _: torch.serialization.default_restore_location(s, "cpu")),
)
# Copies over the settings from the first checkpoint
if new_state is None:
new_state = state
model_params = state["model"]
model_params_keys = list(model_params.keys())
if params_keys is None:
params_keys = model_params_keys
elif params_keys != model_params_keys:
raise KeyError(
f"For checkpoint {f}, expected list of params: {params_keys}, but found: {model_params_keys}"
)
for k in params_keys:
p = model_params[k]
if isinstance(p, torch.HalfTensor):
p = p.float()
if k not in params_dict:
params_dict[k] = p.clone()
# NOTE: clone() is needed in case of p is a shared parameter
else:
params_dict[k] += p
averaged_params = OrderedDict()
for k, v in params_dict.items():
averaged_params[k] = v
if averaged_params[k].is_floating_point():
averaged_params[k].div_(num_models)
else:
averaged_params[k] //= num_models
new_state["model"] = averaged_params
return new_state
def store_model_weights(model, checkpoint_path, checkpoint_key="model", strict=True):
"""
This method can be used to prepare weights files for new models. It receives as
input a model architecture and a checkpoint from the training script and produces
a file with the weights ready for release.
Examples:
from torchvision import models as M
# Classification
model = M.mobilenet_v3_large(weights=None)
print(store_model_weights(model, './class.pth'))
# Quantized Classification
model = M.quantization.mobilenet_v3_large(weights=None, quantize=False)
model.fuse_model(is_qat=True)
model.qconfig = torch.ao.quantization.get_default_qat_qconfig('qnnpack')
_ = torch.ao.quantization.prepare_qat(model, inplace=True)
print(store_model_weights(model, './qat.pth'))
# Object Detection
model = M.detection.fasterrcnn_mobilenet_v3_large_fpn(weights=None, weights_backbone=None)
print(store_model_weights(model, './obj.pth'))
# Segmentation
model = M.segmentation.deeplabv3_mobilenet_v3_large(weights=None, weights_backbone=None, aux_loss=True)
print(store_model_weights(model, './segm.pth', strict=False))
Args:
model (pytorch.nn.Module): The model on which the weights will be loaded for validation purposes.
checkpoint_path (str): The path of the checkpoint we will load.
checkpoint_key (str, optional): The key of the checkpoint where the model weights are stored.
Default: "model".
strict (bool): whether to strictly enforce that the keys
in :attr:`state_dict` match the keys returned by this module's
:meth:`~torch.nn.Module.state_dict` function. Default: ``True``
Returns:
output_path (str): The location where the weights are saved.
"""
# Store the new model next to the checkpoint_path
checkpoint_path = os.path.abspath(checkpoint_path)
output_dir = os.path.dirname(checkpoint_path)
# Deep copy to avoid side-effects on the model object.
model = copy.deepcopy(model)
checkpoint = torch.load(checkpoint_path, map_location="cpu")
# Load the weights to the model to validate that everything works
# and remove unnecessary weights (such as auxiliaries, etc)
if checkpoint_key == "model_ema":
del checkpoint[checkpoint_key]["n_averaged"]
torch.nn.modules.utils.consume_prefix_in_state_dict_if_present(checkpoint[checkpoint_key], "module.")
model.load_state_dict(checkpoint[checkpoint_key], strict=strict)
tmp_path = os.path.join(output_dir, str(model.__hash__()))
torch.save(model.state_dict(), tmp_path)
sha256_hash = hashlib.sha256()
with open(tmp_path, "rb") as f:
# Read and update hash string value in blocks of 4K
for byte_block in iter(lambda: f.read(4096), b""):
sha256_hash.update(byte_block)
hh = sha256_hash.hexdigest()
output_path = os.path.join(output_dir, "weights-" + str(hh[:8]) + ".pth")
os.replace(tmp_path, output_path)
return output_path
def reduce_across_processes(val):
if not is_dist_avail_and_initialized():
# nothing to sync, but we still convert to tensor for consistency with the distributed case.
return torch.tensor(val)
t = torch.tensor(val, device="cuda")
dist.barrier()
dist.all_reduce(t)
return t
def set_weight_decay(
model: torch.nn.Module,
weight_decay: float,
norm_weight_decay: Optional[float] = None,
norm_classes: Optional[List[type]] = None,
custom_keys_weight_decay: Optional[List[Tuple[str, float]]] = None,
):
if not norm_classes:
norm_classes = [
torch.nn.modules.batchnorm._BatchNorm,
torch.nn.LayerNorm,
torch.nn.GroupNorm,
torch.nn.modules.instancenorm._InstanceNorm,
torch.nn.LocalResponseNorm,
]
norm_classes = tuple(norm_classes)
params = {
"other": [],
"norm": [],
}
params_weight_decay = {
"other": weight_decay,
"norm": norm_weight_decay,
}
custom_keys = []
if custom_keys_weight_decay is not None:
for key, weight_decay in custom_keys_weight_decay:
params[key] = []
params_weight_decay[key] = weight_decay
custom_keys.append(key)
def _add_params(module, prefix=""):
for name, p in module.named_parameters(recurse=False):
if not p.requires_grad:
continue
is_custom_key = False
for key in custom_keys:
target_name = f"{prefix}.{name}" if prefix != "" and "." in key else name
if key == target_name:
params[key].append(p)
is_custom_key = True
break
if not is_custom_key:
if norm_weight_decay is not None and isinstance(module, norm_classes):
params["norm"].append(p)
else:
params["other"].append(p)
for child_name, child_module in module.named_children():
child_prefix = f"{prefix}.{child_name}" if prefix != "" else child_name
_add_params(child_module, prefix=child_prefix)
_add_params(model)
param_groups = []
for key in params:
if len(params[key]) > 0:
param_groups.append({"params": params[key], "weight_decay": params_weight_decay[key]})
return param_groups