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)
######################################################################
+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:
# Needed to initialize the model's cache
- model(mygpt.BracketedSequence(input, 0, i.min()))
+ 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, split="train"):
+def compute_perplexity(model, task, prompt_len, split="train"):
with torch.autograd.no_grad():
t = model.training
model.eval()
for input in task.batches(split=split):
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=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)
return (output - targets).abs().sum() / masks.sum()
-def oneshot(gpt, task):
+def oneshot(gpt, learning_rate_scheduler, task):
t = gpt.training
gpt.eval()
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_schedule[n_epoch]
+ learning_rate = learning_rate_scheduler.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 = gpt(mygpt.BracketedSequence(mazes), mode=args.oneshot_input).x
+ 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)
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 = gpt(mygpt.BracketedSequence(mazes), mode=args.oneshot_input).x
+ 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)
# -------------------
mazes = task.test_input[:32, : task.height * task.width]
policies = task.test_policies[:32]
- output_gpt = gpt(mygpt.BracketedSequence(mazes), mode=args.oneshot_input).x
+ 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 = 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,
- f"oneshot_{args.oneshot_input}_{args.oneshot_output}_{n_epoch:04d}.png",
- ),
+ 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 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):
+ for k, v in state.item():
+ setattr(self, k, v)
+
+
+class StepWiseScheduler(LearningRateScheduler):
+ def __init__(self, schedule):
+ self.nb_finished_epochs = 0
+ self.schedule = schedule
+
+ def learning_rate(self):
+ return self.schedule[self.nb_finished_epochs]
+
+ def reset(self):
+ self.nb_finished_epochs = 0
+
+
+######################################################################
+
+
class Task:
- def batches(self, split="train"):
+ def batches(self, split="train", nb_to_use=-1, desc=None):
pass
def vocabulary_size(self):
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=f"epoch-{split}"
+ input.split(self.batch_size), dynamic_ncols=True, desc=desc
):
yield batch
- def policy_batches(self, split="train", nb_to_use=-1):
+ 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[:nb_to_use]
policies = policies[:nb_to_use]
+ if desc is None:
+ desc = f"epoch-{split}"
for batch in tqdm.tqdm(
zip(input.split(self.batch_size), policies.split(self.batch_size)),
dynamic_ncols=True,
- desc=f"epoch-{split}",
+ 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)
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"),
+ 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
+
+
+amm_generator = None
+
+if args.noncausal_prompt:
+ amm_generator = noncausal_prompt_amm_generator
+
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":
+ pass
+
+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:
##############################
-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(",")
- ]
- }
-
- 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"learning_rate_schedule {learning_rate_schedule}")
-
-##############################
-
if nb_epochs_finished >= args.nb_epochs:
n_epoch = nb_epochs_finished
- train_perplexity = compute_perplexity(model, split="train")
- test_perplexity = compute_perplexity(model, split="test")
+ 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"
+ )
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)
- exit(0)
-
##############################
+learning_rate_scheduler.reset()
+
for n_epoch in range(nb_epochs_finished, args.nb_epochs):
- learning_rate = learning_rate_schedule[n_epoch]
+ learning_rate = learning_rate_scheduler.learning_rate()
log_string(f"learning_rate {learning_rate}")
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)
loss.backward()
optimizer.step()
+ learning_rate_scheduler.update(n_epoch + 1, acc_train_loss)
+
train_perplexity = math.exp(min(100, acc_train_loss / nb_train_samples))
- test_perplexity = compute_perplexity(model, split="test")
+ test_perplexity = compute_perplexity(
+ model, task, prompt_len=task.height * task.width, split="test"
+ )
log_string(
f"perplexity {n_epoch} train_set {train_set_perplexity} train_prediction {train_perplexity} test_prediction {test_perplexity}"
######################################################################
if args.oneshot:
- oneshot(model, task)
+ oneshot(model, learning_rate_scheduler, task)
######################################################################
projects / beaver.git / blobdiff