parser.add_argument("--deterministic_synthesis", action="store_true", default=False)
+parser.add_argument("--random_regression_order", action="store_true", default=False)
+
+parser.add_argument("--noncausal_prompt", action="store_true", default=False)
+
parser.add_argument("--no_checkpoint", action="store_true", default=False)
parser.add_argument("--overwrite_results", action="store_true", default=False)
parser.add_argument("--maze_nb_walls", type=int, default=15)
+##############################
+# one-shot prediction
+
+parser.add_argument("--oneshot", action="store_true", default=False)
+
+parser.add_argument("--oneshot_input", type=str, default="head")
+
+parser.add_argument("--oneshot_output", type=str, default="trace")
+
######################################################################
args = parser.parse_args()
sys.stdout.flush()
+log_string(f"cmd {' '.join(sys.argv)}")
+
for n in vars(args):
log_string(f"args.{n} {getattr(args, n)}")
######################################################################
+def reorder(x, order, reverse=False): # x is NxTxD1x...xDk, order is NxT'
+ u = x.reshape(x.size()[:2] + (-1,))
+ order = order.unsqueeze(-1).expand(-1, -1, u.size(-1))
+ if reverse:
+ v = u.new(u.size()).scatter_(1, order, u)
+ else:
+ v = u.gather(1, order)
+ v = v.reshape(v.size()[:2] + x.size()[2:])
+ return v
+
+
+def shuffle(x, prompt_len):
+ if args.random_regression_order:
+ order = torch.rand(x.size(), device=x.device)
+ order[:, :prompt_len] = torch.arange(-prompt_len, 0, device=x.device)
+ order = order.sort(1).indices
+ else:
+ order = (
+ torch.arange(x.size(1), device=x.device).unsqueeze(0).expand(x.size(0), -1)
+ )
+ return reorder(x, order), order
+
+
+def eval_mygpt(model, input, mode="standard", prompt_len=0):
+ x, order = shuffle(input, prompt_len)
+ x = model(mygpt.BracketedSequence(x), mode=mode, order=order).x
+ return reorder(x, order, reverse=True)
+
+
+######################################################################
+
# ar_mask is a Boolean matrix of same shape as input, with 1s on the
# tokens that should be generated
-def masked_inplace_autoregression(model, batch_size, input, ar_mask):
-
- for input, ar_mask in zip(input.split(batch_size), ar_mask.split(batch_size)):
+def masked_inplace_autoregression(model, batch_size, input, ar_mask, order=None):
+ for input, ar_mask, order in zip(
+ input.split(batch_size), ar_mask.split(batch_size), order.split(batch_size)
+ ):
i = (ar_mask.sum(0) > 0).nonzero()
if i.min() > 0:
- model(
- mygpt.BracketedSequence(input, 0, i.min())
- ) # Needed to initialize the model's cache
+ # Needed to initialize the model's cache
+ model(mygpt.BracketedSequence(input, 0, i.min()), order=order)
for s in range(i.min(), i.max() + 1):
- output = model(mygpt.BracketedSequence(input, s, 1)).x
+ output = model(mygpt.BracketedSequence(input, s, 1), order=order).x
logits = output[:, s]
if args.deterministic_synthesis:
t_next = logits.argmax(1)
######################################################################
+def compute_perplexity(model, task, prompt_len, split="train"):
+ with torch.autograd.no_grad():
+ t = model.training
+ model.eval()
+
+ nb_samples, acc_loss = 0, 0.0
+
+ for input in task.batches(split=split):
+ input = input.to(device)
+ output = eval_mygpt(model, input, prompt_len=prompt_len)
+ if args.noncausal_prompt:
+ d = input.size(1) // 2
+ loss = F.cross_entropy(output[:, d:].transpose(1, 2), input[:, d:])
+ else:
+ loss = F.cross_entropy(output.transpose(1, 2), input)
+ acc_loss += loss.item() * input.size(0)
+ nb_samples += input.size(0)
+
+ model.train(t)
+
+ return math.exp(min(100, acc_loss / nb_samples))
+
+
+######################################################################
+
+
+def oneshot_policy_loss(mazes, output, policies, height, width):
+ masks = (mazes == maze.v_empty).unsqueeze(-1)
+ targets = policies.permute(0, 2, 1) * masks
+ output = output * masks
+ return -(output.log_softmax(-1) * targets).sum() / masks.sum()
+
+
+def oneshot_trace_loss(mazes, output, policies, height, width):
+ masks = mazes == maze.v_empty
+ targets = maze.stationary_densities(
+ mazes.view(-1, height, width), policies.view(-1, 4, height, width)
+ ).flatten(-2)
+ targets = targets * masks
+ output = output.squeeze(-1) * masks
+ return (output - targets).abs().sum() / masks.sum()
+
+
+def oneshot(model, learning_rate_scheduler, task):
+ t = model.training
+ model.eval()
+ mazes = task.test_input[:48].clone()
+ mazes[:, task.height * task.width :] = 0
+ policies = task.test_policies[:48]
+ targets = maze.stationary_densities(
+ mazes[:, : task.height * task.width].view(-1, task.height, task.width),
+ policies.view(-1, 4, task.height, task.width),
+ ).flatten(-2)
+ output = eval_mygpt(model, mazes, prompt_len=task.height * task.width)
+ output = F.softmax(output, dim=2)
+ print(f"{output.size()=}")
+ proba_path = output[:, task.height * task.width :, 4].reshape(
+ -1, task.height, task.width
+ )
+ mazes = mazes[:, : task.height * task.width].reshape(-1, task.height, task.width)
+ targets = targets.reshape(-1, task.height, task.width)
+ paths = task.test_input[:48, task.height * task.width :].reshape(
+ -1, task.height, task.width
+ )
+ filename = f"oneshot.png"
+ maze.save_image(
+ os.path.join(args.result_dir, filename),
+ mazes=mazes,
+ # target_paths=paths,
+ score_paths=proba_path,
+ score_truth=targets,
+ )
+ log_string(f"wrote {filename}")
+
+
+def oneshot_old(gpt, learning_rate_scheduler, task):
+ t = gpt.training
+ gpt.eval()
+
+ if args.oneshot_input == "head":
+ dim_in = args.dim_model
+ elif args.oneshot_input == "deep":
+ dim_in = args.dim_model * args.nb_blocks * 2
+ else:
+ raise ValueError(f"{args.oneshot_input=}")
+
+ if args.oneshot_output == "policy":
+ dim_out = 4
+ compute_loss = oneshot_policy_loss
+ elif args.oneshot_output == "trace":
+ dim_out = 1
+ compute_loss = oneshot_trace_loss
+ else:
+ raise ValueError(f"{args.oneshot_output=}")
+
+ model = nn.Sequential(
+ nn.Linear(dim_in, args.dim_model),
+ nn.ReLU(),
+ nn.Linear(args.dim_model, args.dim_model),
+ nn.ReLU(),
+ nn.Linear(args.dim_model, dim_out),
+ ).to(device)
+
+ learning_rate_scheduler.reset()
+
+ for n_epoch in range(args.nb_epochs):
+ learning_rate = learning_rate_scheduler.get_learning_rate()
+ log_string(f"learning_rate {n_epoch} {learning_rate}")
+
+ optimizer = torch.optim.Adam(model.parameters(), lr=learning_rate)
+
+ acc_train_loss, nb_train_samples = 0, 0
+ for mazes, policies in task.policy_batches(split="train"):
+ output_gpt = eval_mygpt(
+ gpt, mazes, mode=args.oneshot_input, prompt_len=task.height * task.width
+ )
+ output = model(output_gpt)
+
+ loss = compute_loss(mazes, output, policies, task.height, task.width)
+ acc_train_loss += loss.item() * mazes.size(0)
+ nb_train_samples += mazes.size(0)
+
+ optimizer.zero_grad()
+ loss.backward()
+ optimizer.step()
+
+ learning_rate_scheduler.update(n_epoch + 1, acc_train_loss)
+
+ acc_test_loss, nb_test_samples = 0, 0
+ for mazes, policies in task.policy_batches(split="test"):
+ output_gpt = eval_mygpt(
+ gpt, mazes, mode=args.oneshot_input, prompt_len=task.height * task.width
+ )
+ output = model(output_gpt)
+ loss = compute_loss(mazes, output, policies, task.height, task.width)
+ acc_test_loss += loss.item() * mazes.size(0)
+ nb_test_samples += mazes.size(0)
+
+ log_string(
+ f"diff_ce {n_epoch} train {acc_train_loss/nb_train_samples} test {acc_test_loss/nb_test_samples}"
+ )
+
+ # -------------------
+ mazes = task.test_input[:48, : task.height * task.width]
+ policies = task.test_policies[:48]
+ output_gpt = eval_mygpt(
+ gpt, mazes, mode=args.oneshot_input, prompt_len=task.height * task.width
+ )
+ output = model(output_gpt)
+ if args.oneshot_output == "policy":
+ targets = policies.permute(0, 2, 1)
+ scores = (
+ (F.one_hot(output.argmax(-1), num_classes=4) * targets).sum(-1) == 0
+ ).float()
+ elif args.oneshot_output == "trace":
+ targets = maze.stationary_densities(
+ mazes.view(-1, task.height, task.width),
+ policies.view(-1, 4, task.height, task.width),
+ ).flatten(-2)
+ scores = output
+ else:
+ raise ValueError(f"{args.oneshot_output=}")
+
+ scores = scores.reshape(-1, task.height, task.width)
+ mazes = mazes.reshape(-1, task.height, task.width)
+ targets = targets.reshape(-1, task.height, task.width)
+ filename = (
+ f"oneshot_{args.oneshot_input}_{args.oneshot_output}_{n_epoch:04d}.png"
+ )
+ maze.save_image(
+ os.path.join(args.result_dir, filename),
+ mazes=mazes,
+ score_paths=scores,
+ score_truth=targets,
+ )
+ log_string(f"wrote {filename}")
+
+ # -------------------
+
+ gpt.train(t)
+
+
+######################################################################
+
+
+class LearningRateScheduler:
+ def get_learning_rate(self):
+ pass
+
+ def update(self, nb_finished_epochs, loss):
+ pass
+
+ def reset(self):
+ pass
+
+ def get_state(self):
+ return vars(self)
+
+ def set_state(self, state):
+ print(f"{state=}")
+ for k, v in state.items():
+ setattr(self, k, v)
+
+
+class StepWiseScheduler(LearningRateScheduler):
+ def __init__(self, schedule):
+ self.nb_finished_epochs = 0
+ self.schedule = schedule
+
+ def get_learning_rate(self):
+ return self.schedule[self.nb_finished_epochs]
+
+ def update(self, nb_finished_epochs, loss):
+ self.nb_finished_epochs = nb_finished_epochs
+
+ def reset(self):
+ self.nb_finished_epochs = 0
+
+ def get_state(self):
+ return {"nb_finished_epochs": self.nb_finished_epochs}
+
+
+class AutoScheduler(LearningRateScheduler):
+ def __init__(self, learning_rate_init, growth=1.0, degrowth=0.2):
+ self.learning_rate_init = learning_rate_init
+ self.learning_rate = learning_rate_init
+ self.growth = growth
+ self.degrowth = degrowth
+ self.pred_loss = None
+
+ def get_learning_rate(self):
+ return self.learning_rate
+
+ def update(self, nb_finished_epochs, loss):
+ if self.pred_loss is not None:
+ if loss >= self.pred_loss:
+ self.learning_rate *= self.degrowth
+ else:
+ self.learning_rate *= self.growth
+ self.pred_loss = loss
+
+ def reset(self):
+ self.learning_rate = self.learning_rate_init
+
+ def get_state(self):
+ return {
+ "learning_rate_init": self.learning_rate_init,
+ "pred_loss": self.pred_loss,
+ }
+
+
+######################################################################
+
+
class Task:
- def batches(self, split="train"):
+ def batches(self, split="train", nb_to_use=-1, desc=None):
pass
def vocabulary_size(self):
self.width = width
self.device = device
- mazes_train, paths_train = maze.create_maze_data(
+ train_mazes, train_paths, train_policies = maze.create_maze_data(
nb_train_samples,
height=height,
width=width,
nb_walls=nb_walls,
progress_bar=lambda x: tqdm.tqdm(x, dynamic_ncols=True, desc=f"data-train"),
)
- mazes_train, paths_train = mazes_train.to(device), paths_train.to(device)
- self.train_input = self.map2seq(mazes_train, paths_train)
+ self.train_input = self.map2seq(train_mazes.to(device), train_paths.to(device))
+ self.train_policies = train_policies.flatten(-2).to(device)
- mazes_test, paths_test = maze.create_maze_data(
+ test_mazes, test_paths, test_policies = maze.create_maze_data(
nb_test_samples,
height=height,
width=width,
nb_walls=nb_walls,
progress_bar=lambda x: tqdm.tqdm(x, dynamic_ncols=True, desc=f"data-test"),
)
- mazes_test, paths_test = mazes_test.to(device), paths_test.to(device)
- self.test_input = self.map2seq(mazes_test, paths_test)
+ self.test_input = self.map2seq(test_mazes.to(device), test_paths.to(device))
+ self.test_policies = test_policies.flatten(-2).to(device)
self.nb_codes = self.train_input.max() + 1
- def batches(self, split="train", nb_to_use=-1):
+ def batches(self, split="train", nb_to_use=-1, desc=None):
+ assert split in {"train", "test"}
+ input = self.train_input if split == "train" else self.test_input
+ if nb_to_use > 0:
+ input = input[:nb_to_use]
+ if desc is None:
+ desc = f"epoch-{split}"
+ for batch in tqdm.tqdm(
+ input.split(self.batch_size), dynamic_ncols=True, desc=desc
+ ):
+ yield batch
+
+ def policy_batches(self, split="train", nb_to_use=-1, desc=None):
assert split in {"train", "test"}
input = self.train_input if split == "train" else self.test_input
+ policies = self.train_policies if split == "train" else self.test_policies
+ input = input[:, : self.height * self.width]
+ policies = policies * (input != maze.v_wall)[:, None]
+
if nb_to_use > 0:
input = input[:nb_to_use]
+ policies = policies[:nb_to_use]
+
+ if desc is None:
+ desc = f"epoch-{split}"
for batch in tqdm.tqdm(
- input.split(self.batch_size), dynamic_ncols=True, desc=f"epoch-{split}"
+ zip(input.split(self.batch_size), policies.split(self.batch_size)),
+ dynamic_ncols=True,
+ desc=desc,
):
yield batch
ar_mask = result.new_zeros(result.size())
ar_mask[:, self.height * self.width :] = 1
result *= 1 - ar_mask
- masked_inplace_autoregression(model, self.batch_size, result, ar_mask)
+ x, order = shuffle(result, self.height * self.width)
+ masked_inplace_autoregression(
+ model, self.batch_size, x, ar_mask, order=order
+ )
+ result = reorder(x, order, reverse=True)
mazes, paths = self.seq2map(result)
nb_correct += maze.path_correctness(mazes, paths).long().sum()
nb_total += mazes.size(0)
f"accuracy_test nb_total {test_nb_total} nb_correct {test_nb_correct} accuracy {(100.0*test_nb_correct)/test_nb_total:.02f}%"
)
- input = self.test_input[:32]
+ input = self.test_input[:48]
result = input.clone()
ar_mask = result.new_zeros(result.size())
ar_mask[:, self.height * self.width :] = 1
result *= 1 - ar_mask
- masked_inplace_autoregression(model, self.batch_size, result, ar_mask)
+ x, order = shuffle(result, self.height * self.width)
+ masked_inplace_autoregression(
+ model, self.batch_size, x, ar_mask, order=order
+ )
+ result = reorder(x, order, reverse=True)
mazes, paths = self.seq2map(input)
_, predicted_paths = self.seq2map(result)
+ filename = f"result_{n_epoch:04d}.png"
maze.save_image(
- os.path.join(args.result_dir, f"result_{n_epoch:04d}.png"),
- mazes,
- paths,
- predicted_paths,
- maze.path_correctness(mazes, predicted_paths),
+ os.path.join(args.result_dir, filename),
+ mazes=mazes,
+ target_paths=paths,
+ predicted_paths=predicted_paths,
+ path_correct=maze.path_correctness(mazes, predicted_paths),
)
+ log_string(f"wrote {filename}")
model.train(t)
##############################
+
+def noncausal_prompt_amm_generator(d):
+ q = torch.arange(d)[:, None]
+ k = torch.arange(d)[None, :]
+ s = args.maze_height * args.maze_width
+ return torch.logical_and(q < k, torch.logical_or(q >= s, k >= s))
+ # return q < k
+
+
+def noncausal_prompt_oneshot_amm_generator(d):
+ q = torch.arange(d)[:, None]
+ k = torch.arange(d)[None, :]
+ s = args.maze_height * args.maze_width
+ return k >= s
+ # return q < k
+
+
+if args.oneshot:
+ amm_generator = noncausal_prompt_oneshot_amm_generator
+elif args.noncausal_prompt:
+ amm_generator = noncausal_prompt_amm_generator
+else:
+ amm_generator = None
+
model = mygpt.MyGPT(
vocabulary_size=vocabulary_size,
dim_model=args.dim_model,
nb_blocks=args.nb_blocks,
causal=True,
dropout=args.dropout,
+ amm_generator=amm_generator,
)
model.to(device)
######################################################################
+if args.learning_rate_schedule == "auto":
+ learning_rate_scheduler = AutoScheduler(args.learning_rate)
+
+elif args.learning_rate_schedule == "cos":
+ schedule = {}
+ for n_epoch in range(args.nb_epochs):
+ u = n_epoch / args.nb_epochs * math.pi
+ schedule[n_epoch] = args.learning_rate * 0.5 * (1 + math.cos(u))
+ learning_rate_scheduler = StepWiseScheduler(schedule)
+ log_string(f"learning_rate_schedule {schedule}")
+
+else:
+ u = {
+ int(k): float(v)
+ for k, v in [
+ tuple(x.split(":")) for x in args.learning_rate_schedule.split(",")
+ ]
+ }
+
+ schedule = {}
+ learning_rate = args.learning_rate
+ for n_epoch in range(args.nb_epochs):
+ if n_epoch in u:
+ learning_rate = u[n_epoch]
+ schedule[n_epoch] = learning_rate
+ learning_rate_scheduler = StepWiseScheduler(schedule)
+ log_string(f"learning_rate_schedule {schedule}")
+
+######################################################################
+
nb_epochs_finished = 0
if args.no_checkpoint:
checkpoint = torch.load(checkpoint_name)
nb_epochs_finished = checkpoint["nb_epochs_finished"]
model.load_state_dict(checkpoint["model_state"])
+ learning_rate_scheduler.set_state(checkpoint["learning_rate_scheduler_state"])
torch.set_rng_state(checkpoint["rng_state"])
if torch.cuda.is_available():
torch.cuda.set_rng_state(checkpoint["cuda_rng_state"])
except FileNotFoundError:
log_string("starting from scratch.")
- except:
- log_string("error when loading the checkpoint.")
- exit(1)
+ # except:
+ # log_string("error when loading the checkpoint.")
+ # exit(1)
######################################################################
-nb_epochs = args.nb_epochs if args.nb_epochs > 0 else nb_epochs_default
+if args.oneshot:
+ oneshot(model, learning_rate_scheduler, task)
+ exit(0)
+
+######################################################################
token_count = 0
for input in task.batches(split="train"):
##############################
-if args.learning_rate_schedule == "cos":
- learning_rate_schedule = {}
- for n_epoch in range(args.nb_epochs):
- u = n_epoch / args.nb_epochs * math.pi
- learning_rate_schedule[n_epoch] = args.learning_rate * 0.5 * (1 + math.cos(u))
-else:
- u = {
- int(k): float(v)
- for k, v in [
- tuple(x.split(":")) for x in args.learning_rate_schedule.split(",")
- ]
- }
+if nb_epochs_finished >= args.nb_epochs:
+ n_epoch = nb_epochs_finished
+ train_perplexity = compute_perplexity(
+ model, task, prompt_len=task.height * task.width, split="train"
+ )
+ test_perplexity = compute_perplexity(
+ model, task, prompt_len=task.height * task.width, split="test"
+ )
- learning_rate_schedule = {}
- learning_rate = args.learning_rate
- for n_epoch in range(args.nb_epochs):
- if n_epoch in u:
- learning_rate = u[n_epoch]
- learning_rate_schedule[n_epoch] = learning_rate
+ log_string(
+ f"perplexity {n_epoch} train_set {train_set_perplexity} train_prediction {train_perplexity} test_prediction {test_perplexity}"
+ )
-log_string(f"learning_rate_schedule {learning_rate_schedule}")
+ task.produce_results(n_epoch, model)
##############################
-nb_samples_seen = 0
-
-if nb_epochs_finished >= nb_epochs:
- task.produce_results(nb_epochs_finished, model)
+learning_rate_scheduler.reset()
-for n_epoch in range(nb_epochs_finished, nb_epochs):
-
- learning_rate = learning_rate_schedule[n_epoch]
-
- log_string(f"learning_rate {learning_rate}")
+for n_epoch in range(nb_epochs_finished, args.nb_epochs):
+ learning_rate = learning_rate_scheduler.get_learning_rate()
+ log_string(f"learning_rate {n_epoch} {learning_rate}")
if args.optim == "sgd":
optimizer = torch.optim.SGD(model.parameters(), lr=learning_rate)
elif args.optim == "adamw":
optimizer = torch.optim.AdamW(model.parameters(), lr=learning_rate)
else:
- raise ValueError(f"Unknown optimizer {args.optim}.")
+ raise ValueError(f"{args.optim=}")
model.train()
for input in task.batches(split="train"):
input = input.to(device)
- output = model(mygpt.BracketedSequence(input)).x
- loss = F.cross_entropy(output.transpose(1, 2), input)
+ output = eval_mygpt(model, input, prompt_len=task.height * task.width)
+ if args.noncausal_prompt:
+ d = input.size(1) // 2
+ loss = F.cross_entropy(output[:, d:].transpose(1, 2), input[:, d:])
+ else:
+ loss = F.cross_entropy(output.transpose(1, 2), input)
acc_train_loss += loss.item() * input.size(0)
nb_train_samples += input.size(0)
- nb_samples_seen += input.size(0)
optimizer.zero_grad()
loss.backward()
optimizer.step()
- with torch.autograd.no_grad():
+ learning_rate_scheduler.update(n_epoch + 1, acc_train_loss)
- model.eval()
+ train_perplexity = math.exp(min(100, acc_train_loss / nb_train_samples))
+ test_perplexity = compute_perplexity(
+ model, task, prompt_len=task.height * task.width, split="test"
+ )
- nb_test_samples, acc_test_loss = 0, 0.0
-
- for input in task.batches(split="test"):
- input = input.to(device)
-
- # input, loss_masks, true_images = task.excise_last_image(input)
- # input, loss_masks = task.add_true_image(input, true_images, loss_masks)
-
- output = model(mygpt.BracketedSequence(input)).x
- loss = F.cross_entropy(output.transpose(1, 2), input)
- acc_test_loss += loss.item() * input.size(0)
- nb_test_samples += input.size(0)
-
- train_perplexity = math.exp(min(100, acc_train_loss / nb_train_samples))
- test_perplexity = math.exp(min(100, acc_test_loss / nb_test_samples))
-
- log_string(
- f"perplexity {n_epoch} train_set {train_set_perplexity} train_prediction {train_perplexity} test_prediction {test_perplexity}"
- )
+ log_string(
+ f"perplexity {n_epoch} train_set {train_set_perplexity} train_prediction {train_perplexity} test_prediction {test_perplexity}"
+ )
- task.produce_results(n_epoch, model)
+ task.produce_results(n_epoch, model)
checkpoint = {
"nb_epochs_finished": n_epoch + 1,
"model_state": model.state_dict(),
+ "learning_rate_scheduler_state": learning_rate_scheduler.get_state(),
"rng_state": torch.get_rng_state(),
}
projects / beaver.git / blobdiff