3 # Any copyright is dedicated to the Public Domain.
4 # https://creativecommons.org/publicdomain/zero/1.0/
6 # Written by Francois Fleuret <francois@fleuret.org>
8 # torch.backends.cuda.matmul.allow_tf23
9 # torch.autocast(torch.bfloat16)
11 import math, sys, argparse, time, tqdm, os
13 import torch, torchvision
15 from torch.nn import functional as F
19 ######################################################################
21 if torch.cuda.is_available():
22 device = torch.device("cuda")
23 torch.backends.cuda.matmul.allow_tf32 = True
25 device = torch.device("cpu")
27 ######################################################################
29 parser = argparse.ArgumentParser(
30 description="An implementation of GPT with cache.",
31 formatter_class=argparse.ArgumentDefaultsHelpFormatter,
38 help="picoclvr, mnist, maze, snake, stack, expr",
41 parser.add_argument("--log_filename", type=str, default="train.log", help=" ")
43 parser.add_argument("--result_dir", type=str, default=None)
45 parser.add_argument("--seed", type=int, default=0)
47 parser.add_argument("--nb_epochs", type=int, default=None)
49 parser.add_argument("--batch_size", type=int, default=None)
51 parser.add_argument("--nb_train_samples", type=int, default=None)
53 parser.add_argument("--nb_test_samples", type=int, default=None)
55 parser.add_argument("--optim", type=str, default="adam")
57 parser.add_argument("--learning_rate", type=float, default=1e-4)
59 parser.add_argument("--learning_rate_schedule", type=str, default="10: 2e-5,30: 4e-6")
61 parser.add_argument("--dim_model", type=int, default=512)
63 parser.add_argument("--dim_keys", type=int, default=64)
65 parser.add_argument("--dim_hidden", type=int, default=2048)
67 parser.add_argument("--nb_heads", type=int, default=8)
69 parser.add_argument("--nb_blocks", type=int, default=12)
71 parser.add_argument("--dropout", type=float, default=0.1)
73 parser.add_argument("--deterministic_synthesis", action="store_true", default=False)
75 parser.add_argument("--no_checkpoint", action="store_true", default=False)
77 parser.add_argument("--overwrite_results", action="store_true", default=False)
79 parser.add_argument("--checkpoint_name", type=str, default="checkpoint.pth")
81 ##############################
84 parser.add_argument("--picoclvr_nb_colors", type=int, default=5)
86 parser.add_argument("--picoclvr_height", type=int, default=12)
88 parser.add_argument("--picoclvr_width", type=int, default=16)
90 parser.add_argument("--picocvlr_prune_properties", type=str, default="none")
92 ##############################
95 parser.add_argument("--maze_height", type=int, default=23)
97 parser.add_argument("--maze_width", type=int, default=39)
99 parser.add_argument("--maze_nb_walls", type=int, default=45)
101 ##############################
104 parser.add_argument("--snake_height", type=int, default=6)
106 parser.add_argument("--snake_width", type=int, default=8)
108 parser.add_argument("--snake_nb_colors", type=int, default=5)
110 parser.add_argument("--snake_length", type=int, default=200)
112 ##############################
115 parser.add_argument("--stack_nb_steps", type=int, default=100)
117 parser.add_argument("--stack_nb_stacks", type=int, default=3)
119 parser.add_argument("--stack_nb_digits", type=int, default=3)
121 parser.add_argument("--stack_fraction_values_for_train", type=float, default=0.75)
123 ##############################
126 parser.add_argument("--expr_nb_variables", type=int, default=5)
128 parser.add_argument("--expr_sequence_length", type=int, default=30)
130 ######################################################################
132 args = parser.parse_args()
134 assert args.picocvlr_prune_properties in {"none", "train+eval", "eval"}
136 if args.result_dir is None:
137 args.result_dir = f"results_{args.task}"
139 ######################################################################
145 "nb_train_samples": 250000,
146 "nb_test_samples": 10000,
151 "nb_train_samples": 250000,
152 "nb_test_samples": 10000,
157 "nb_train_samples": 250000,
158 "nb_test_samples": 10000,
163 "nb_train_samples": 250000,
164 "nb_test_samples": 10000,
169 "nb_train_samples": 100000,
170 "nb_test_samples": 1000,
175 "nb_train_samples": 250000,
176 "nb_test_samples": 10000,
180 if args.task in default_args:
181 for k, v in default_args[args.task].items():
182 if getattr(args, k) is None:
185 ######################################################################
188 os.mkdir(args.result_dir)
189 except FileExistsError:
190 if not args.overwrite_results:
191 print(f"result directory {args.result_dir} already exists")
194 log_file = open(os.path.join(args.result_dir, args.log_filename), "a")
197 # torch.backends.cudnn.deterministic = True
198 # torch.backends.cudnn.benchmark = False
199 # torch.use_deterministic_algorithms(True)
200 torch.manual_seed(args.seed)
201 if torch.cuda.is_available():
202 torch.cuda.manual_seed_all(args.seed)
204 ######################################################################
208 t = time.strftime("%Y%m%d-%H:%M:%S ", time.localtime())
210 if log_file is not None:
211 log_file.write(t + s + "\n")
219 log_string(f"args.{n} {getattr(args, n)}")
222 ######################################################################
225 def picoclvr_pruner_horizontal_green(p):
226 return not ("green" in p and ("left" in p or "right" in p))
229 picoclvr_pruner_train = (
230 picoclvr_pruner_horizontal_green
231 if args.picocvlr_prune_properties in {"train+eval"}
235 picoclvr_pruner_eval = (
236 (lambda p: not picoclvr_pruner_horizontal_green(p))
237 if args.picocvlr_prune_properties in {"train+eval", "eval"}
241 ######################################################################
243 if args.task == "picoclvr":
244 task = tasks.PicoCLVR(
245 nb_train_samples=args.nb_train_samples,
246 nb_test_samples=args.nb_test_samples,
247 batch_size=args.batch_size,
248 height=args.picoclvr_height,
249 width=args.picoclvr_width,
250 nb_colors=args.picoclvr_nb_colors,
253 pruner_train=picoclvr_pruner_train,
254 pruner_eval=picoclvr_pruner_eval,
257 elif args.task == "mnist":
259 nb_train_samples=args.nb_train_samples,
260 nb_test_samples=args.nb_test_samples,
261 batch_size=args.batch_size,
265 elif args.task == "maze":
267 nb_train_samples=args.nb_train_samples,
268 nb_test_samples=args.nb_test_samples,
269 batch_size=args.batch_size,
270 height=args.maze_height,
271 width=args.maze_width,
272 nb_walls=args.maze_nb_walls,
276 elif args.task == "snake":
278 nb_train_samples=args.nb_train_samples,
279 nb_test_samples=args.nb_test_samples,
280 batch_size=args.batch_size,
281 height=args.snake_height,
282 width=args.snake_width,
283 nb_colors=args.snake_nb_colors,
284 length=args.snake_length,
285 prompt_length=args.snake_length // 2,
289 elif args.task == "stack":
291 nb_train_samples=args.nb_train_samples,
292 nb_test_samples=args.nb_test_samples,
293 batch_size=args.batch_size,
295 nb_steps=args.stack_nb_steps,
296 nb_stacks=args.stack_nb_stacks,
297 nb_digits=args.stack_nb_digits,
298 fraction_values_for_train=args.stack_fraction_values_for_train,
302 elif args.task == "expr":
304 nb_train_samples=args.nb_train_samples,
305 nb_test_samples=args.nb_test_samples,
306 nb_variables=args.expr_nb_variables,
307 sequence_length=args.expr_sequence_length,
308 batch_size=args.batch_size,
313 raise ValueError(f"Unknown task {args.task}")
315 ######################################################################
317 log_string(f"device {device}")
319 vocabulary_size = task.vocabulary_size()
321 log_string(f"vocabulary_size {vocabulary_size}")
323 ##############################
326 vocabulary_size=vocabulary_size,
327 dim_model=args.dim_model,
328 dim_keys=args.dim_keys,
329 dim_hidden=args.dim_hidden,
330 nb_heads=args.nb_heads,
331 nb_blocks=args.nb_blocks,
333 dropout=args.dropout,
338 nb_parameters = sum(p.numel() for p in model.parameters())
339 log_string(f"nb_parameters {nb_parameters} ({int(nb_parameters/1e6)}M)")
341 ######################################################################
343 nb_epochs_finished = 0
345 if args.no_checkpoint:
346 log_string(f"not trying to load checkpoint.")
350 checkpoint_name = os.path.join(args.result_dir, args.checkpoint_name)
351 checkpoint = torch.load(checkpoint_name)
352 nb_epochs_finished = checkpoint["nb_epochs_finished"]
353 model.load_state_dict(checkpoint["model_state"])
354 torch.set_rng_state(checkpoint["rng_state"])
355 if torch.cuda.is_available():
356 torch.cuda.set_rng_state(checkpoint["cuda_rng_state"])
358 log_string(f"checkpoint loaded with {nb_epochs_finished} epochs finished.")
360 except FileNotFoundError:
361 log_string("starting from scratch.")
364 log_string("error when loading the checkpoint.")
367 ######################################################################
369 nb_epochs = args.nb_epochs if args.nb_epochs > 0 else nb_epochs_default
371 # Compute the entropy of the training tokens
374 for input in task.batches(split="train"):
375 token_count += F.one_hot(input, num_classes=task.vocabulary_size()).sum((0, 1))
376 token_probas = token_count / token_count.sum()
377 entropy = -torch.xlogy(token_probas, token_probas).sum()
378 train_set_perplexity = math.exp(entropy)
380 ##############################
382 # A bit of paranoia never hurts
387 for input in task.batches(split="train"):
388 assert input.dim() == 2 and input.dtype == torch.int64
390 train_examples[x.sum().item()] = x
392 nb_total, nb_collisions = 0, 0
393 for input in task.batches(split="test"):
394 assert input.dim() == 2 and input.dtype == torch.int64
397 y = train_examples.get(x.sum().item())
399 if x.size() == y.size() and (x - y).abs().sum() == 0:
405 f"data_check {nb_collisions*100/nb_total:.02f}% ({nb_collisions}/{nb_total}) of test samples are in the train set"
408 ##############################
410 if args.learning_rate_schedule == "cos":
411 learning_rate_schedule = {}
412 for n_epoch in range(args.nb_epochs):
413 u = n_epoch / args.nb_epochs * math.pi
414 learning_rate_schedule[n_epoch] = args.learning_rate * 0.5 * (1 + math.cos(u))
419 tuple(x.split(":")) for x in args.learning_rate_schedule.split(",")
423 learning_rate_schedule = {}
424 learning_rate = args.learning_rate
425 for n_epoch in range(args.nb_epochs):
427 learning_rate = u[n_epoch]
428 learning_rate_schedule[n_epoch] = learning_rate
430 log_string(f"learning_rate_schedule {learning_rate_schedule}")
432 ##############################
436 if nb_epochs_finished >= nb_epochs:
437 task.produce_results(
442 args.deterministic_synthesis,
445 for n_epoch in range(nb_epochs_finished, nb_epochs):
446 learning_rate = learning_rate_schedule[n_epoch]
448 log_string(f"learning_rate {learning_rate}")
450 if args.optim == "sgd":
451 optimizer = torch.optim.SGD(model.parameters(), lr=learning_rate)
452 elif args.optim == "adam":
453 optimizer = torch.optim.Adam(model.parameters(), lr=learning_rate)
454 elif args.optim == "adamw":
455 optimizer = torch.optim.AdamW(model.parameters(), lr=learning_rate)
457 raise ValueError(f"Unknown optimizer {args.optim}.")
461 nb_train_samples, acc_train_loss = 0, 0.0
463 for input in task.batches(split="train"):
464 input = input.to(device)
465 output = model(mygpt.BracketedSequence(input)).x
466 loss = F.cross_entropy(output.transpose(1, 2), input)
467 acc_train_loss += loss.item() * input.size(0)
468 nb_train_samples += input.size(0)
469 nb_samples_seen += input.size(0)
471 optimizer.zero_grad()
475 with torch.autograd.no_grad():
478 nb_test_samples, acc_test_loss = 0, 0.0
480 for input in task.batches(split="test"):
481 input = input.to(device)
483 output = model(mygpt.BracketedSequence(input)).x
484 loss = F.cross_entropy(output.transpose(1, 2), input)
485 acc_test_loss += loss.item() * input.size(0)
486 nb_test_samples += input.size(0)
488 train_perplexity = math.exp(min(100, acc_train_loss / nb_train_samples))
489 test_perplexity = math.exp(min(100, acc_test_loss / nb_test_samples))
492 f"perplexity {n_epoch} train_set {train_set_perplexity} train_prediction {train_perplexity} test_prediction {test_perplexity}"
495 task.produce_results(
496 n_epoch, model, args.result_dir, log_string, args.deterministic_synthesis
500 "nb_epochs_finished": n_epoch + 1,
501 "model_state": model.state_dict(),
502 "rng_state": torch.get_rng_state(),
505 if torch.cuda.is_available():
506 checkpoint["cuda_rng_state"] = torch.cuda.get_rng_state()
508 checkpoint_name = os.path.join(args.result_dir, args.checkpoint_name)
509 torch.save(checkpoint, checkpoint_name)
510 log_string(f"saved checkpoint {checkpoint_name}")
512 ######################################################################