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6 Commits

Author SHA1 Message Date
Phil Wang
68e7d2f241 make sure gradient accumulation feature works even if all arguments passed in are keyword arguments 2022-05-15 11:16:16 -07:00
Phil Wang
74f222596a remove todo 2022-05-15 11:01:35 -07:00
Phil Wang
aa6772dcff make sure optimizer and scaler is reloaded on resume for training diffusion prior script, move argparse to click 2022-05-15 10:48:10 -07:00
Phil Wang
71d0c4edae cleanup to use diffusion prior trainer 2022-05-15 10:16:05 -07:00
Phil Wang
f7eee09d8b 0.2.30 2022-05-15 09:56:59 -07:00
Phil Wang
89de5af63e experiment tracker agnostic 2022-05-15 09:56:40 -07:00
5 changed files with 285 additions and 167 deletions

View File

@@ -814,8 +814,8 @@ clip = CLIP(
# mock data
text = torch.randint(0, 49408, (4, 256)).cuda()
images = torch.randn(4, 3, 256, 256).cuda()
text = torch.randint(0, 49408, (32, 256)).cuda()
images = torch.randn(32, 3, 256, 256).cuda()
# prior networks (with transformer)
@@ -842,7 +842,7 @@ diffusion_prior_trainer = DiffusionPriorTrainer(
ema_update_every = 10,
)
loss = diffusion_prior_trainer(text, images)
loss = diffusion_prior_trainer(text, images, max_batch_size = 4)
diffusion_prior_trainer.update() # this will update the optimizer as well as the exponential moving averaged diffusion prior
# after much of the above three lines in a loop
@@ -1007,6 +1007,7 @@ Once built, images will be saved to the same directory the command is invoked
- [x] make sure the cascading ddpm in the repository can be trained unconditionally, offer a one-line CLI tool for training on a folder of images
- [x] bring in cross-scale embedding from iclr paper https://github.com/lucidrains/vit-pytorch/blob/main/vit_pytorch/crossformer.py#L14
- [x] cross embed layers for downsampling, as an option
- [x] use an experimental tracker agnostic setup, as done <a href="https://github.com/lucidrains/tf-bind-transformer#simple-trainer-class-for-fine-tuning">here</a>
- [ ] become an expert with unets, cleanup unet code, make it fully configurable, port all learnings over to https://github.com/lucidrains/x-unet (test out unet² in ddpm repo) - consider https://github.com/lucidrains/uformer-pytorch attention-based unet
- [ ] transcribe code to Jax, which lowers the activation energy for distributed training, given access to TPUs
- [ ] train on a toy task, offer in colab
@@ -1014,7 +1015,6 @@ Once built, images will be saved to the same directory the command is invoked
- [ ] extend diffusion head to use diffusion-gan (potentially using lightweight-gan) to speed up inference
- [ ] figure out if possible to augment with external memory, as described in https://arxiv.org/abs/2204.11824
- [ ] test out grid attention in cascading ddpm locally, decide whether to keep or remove
- [ ] use an experimental tracker agnostic setup, as done <a href="https://github.com/lucidrains/tf-bind-transformer#simple-trainer-class-for-fine-tuning">here</a>
- [ ] interface out the vqgan-vae so a pretrained one can be pulled off the shelf to validate latent diffusion + DALL-E2
- [ ] make sure FILIP works with DALL-E2 from x-clip https://arxiv.org/abs/2111.07783
- [ ] offer save / load methods on the trainer classes to automatically take care of state dicts for scalers / optimizers / saving versions and checking for breaking changes

View File

@@ -0,0 +1,49 @@
import os
import torch
from torch import nn
# helper functions
def exists(val):
return val is not None
# base class
class BaseTracker(nn.Module):
def __init__(self):
super().__init__()
def init(self, config, **kwargs):
raise NotImplementedError
def log(self, log, **kwargs):
raise NotImplementedError
# basic stdout class
class ConsoleTracker(BaseTracker):
def init(self, **config):
print(config)
def log(self, log, **kwargs):
print(log)
# basic wandb class
class WandbTracker(BaseTracker):
def __init__(self):
super().__init__()
try:
import wandb
except ImportError as e:
print('`pip install wandb` to use the wandb experiment tracker')
raise e
os.environ["WANDB_SILENT"] = "true"
self.wandb = wandb
def init(self, **config):
self.wandb.init(**config)
def log(self, log, **kwargs):
self.wandb.log(log, **kwargs)

View File

@@ -66,15 +66,24 @@ def split(t, split_size = None):
return TypeError
def split_args_and_kwargs(x, *args, split_size = None, **kwargs):
batch_size = len(x)
def find_first(cond, arr):
for el in arr:
if cond(el):
return el
return None
def split_args_and_kwargs(*args, split_size = None, **kwargs):
all_args = (*args, *kwargs.values())
len_all_args = len(all_args)
first_tensor = find_first(lambda t: isinstance(t, torch.Tensor), all_args)
assert exists(first_tensor)
batch_size = len(first_tensor)
split_size = default(split_size, batch_size)
chunk_size = ceil(batch_size / split_size)
dict_len = len(kwargs)
dict_keys = kwargs.keys()
all_args = (x, *args, *kwargs.values())
len_all_args = len(all_args)
split_kwargs_index = len_all_args - dict_len
split_all_args = [split(arg, split_size = split_size) if exists(arg) and isinstance(arg, (torch.Tensor, Iterable)) else ((arg,) * chunk_size) for arg in all_args]
@@ -117,7 +126,7 @@ def load_diffusion_model(dprior_path, device):
# Load state dict from saved model
diffusion_prior.load_state_dict(loaded_obj['model'])
return diffusion_prior
return diffusion_prior, loaded_obj
def save_diffusion_model(save_path, model, optimizer, scaler, config, image_embed_dim):
# Saving State Dict
@@ -228,6 +237,8 @@ class DiffusionPriorTrainer(nn.Module):
self.max_grad_norm = max_grad_norm
self.register_buffer('step', torch.tensor([0.]))
def update(self):
if exists(self.max_grad_norm):
self.scaler.unscale_(self.optimizer)
@@ -240,6 +251,8 @@ class DiffusionPriorTrainer(nn.Module):
if self.use_ema:
self.ema_diffusion_prior.update()
self.step += 1
@torch.inference_mode()
def p_sample_loop(self, *args, **kwargs):
return self.ema_diffusion_prior.ema_model.p_sample_loop(*args, **kwargs)
@@ -254,14 +267,13 @@ class DiffusionPriorTrainer(nn.Module):
def forward(
self,
x,
*args,
max_batch_size = None,
**kwargs
):
total_loss = 0.
for chunk_size_frac, (chunked_args, chunked_kwargs) in split_args_and_kwargs(x, *args, split_size = max_batch_size, **kwargs):
for chunk_size_frac, (chunked_args, chunked_kwargs) in split_args_and_kwargs(*args, split_size = max_batch_size, **kwargs):
with autocast(enabled = self.amp):
loss = self.diffusion_prior(*chunked_args, **chunked_kwargs)
loss = loss * chunk_size_frac
@@ -328,6 +340,8 @@ class DecoderTrainer(nn.Module):
self.max_grad_norm = max_grad_norm
self.register_buffer('step', torch.tensor([0.]))
@property
def unets(self):
return nn.ModuleList([ema.ema_model for ema in self.ema_unets])
@@ -358,6 +372,8 @@ class DecoderTrainer(nn.Module):
ema_unet = self.ema_unets[index]
ema_unet.update()
self.step += 1
@torch.no_grad()
def sample(self, *args, **kwargs):
if self.use_ema:
@@ -377,15 +393,14 @@ class DecoderTrainer(nn.Module):
def forward(
self,
x,
*,
*args,
unet_number,
max_batch_size = None,
**kwargs
):
total_loss = 0.
for chunk_size_frac, (chunked_args, chunked_kwargs) in split_args_and_kwargs(x, split_size = max_batch_size, **kwargs):
for chunk_size_frac, (chunked_args, chunked_kwargs) in split_args_and_kwargs(*args, split_size = max_batch_size, **kwargs):
with autocast(enabled = self.amp):
loss = self.decoder(*chunked_args, unet_number = unet_number, **chunked_kwargs)
loss = loss * chunk_size_frac

View File

@@ -10,7 +10,7 @@ setup(
'dream = dalle2_pytorch.cli:dream'
],
},
version = '0.2.29',
version = '0.2.31',
license='MIT',
description = 'DALL-E 2',
author = 'Phil Wang',

View File

@@ -1,24 +1,42 @@
import os
from pathlib import Path
import click
import math
import argparse
import time
import numpy as np
import torch
from torch import nn
from embedding_reader import EmbeddingReader
from dalle2_pytorch import DiffusionPrior, DiffusionPriorNetwork
from dalle2_pytorch.train import load_diffusion_model, save_diffusion_model, print_ribbon
from dalle2_pytorch.optimizer import get_optimizer
from torch.cuda.amp import autocast,GradScaler
import time
from dalle2_pytorch import DiffusionPrior, DiffusionPriorNetwork
from dalle2_pytorch.train import DiffusionPriorTrainer, load_diffusion_model, save_diffusion_model, print_ribbon
from dalle2_pytorch.trackers import ConsoleTracker, WandbTracker
from embedding_reader import EmbeddingReader
from tqdm import tqdm
import wandb
os.environ["WANDB_SILENT"] = "true"
# constants
NUM_TEST_EMBEDDINGS = 100 # for cosine similarity reporting during training
REPORT_METRICS_EVERY = 100 # for cosine similarity and other metric reporting during training
tracker = WandbTracker()
# helpers functions
def exists(val):
val is not None
class Timer:
def __init__(self):
self.reset()
def reset(self):
self.last_time = time.time()
def elapsed(self):
return time.time() - self.last_time
# functions
def eval_model(model,device,image_reader,text_reader,start,end,batch_size,loss_type,phase="Validation"):
model.eval()
@@ -40,7 +58,7 @@ def eval_model(model,device,image_reader,text_reader,start,end,batch_size,loss_t
total_samples += batches
avg_loss = (total_loss / total_samples)
wandb.log({f'{phase} {loss_type}': avg_loss})
tracker.log({f'{phase} {loss_type}': avg_loss})
def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,NUM_TEST_EMBEDDINGS,device):
diffusion_prior.eval()
@@ -87,7 +105,7 @@ def report_cosine_sims(diffusion_prior,image_reader,text_reader,train_set_size,N
text_embed, predicted_unrelated_embeddings).cpu().numpy()
predicted_img_similarity = cos(
test_image_embeddings, predicted_image_embeddings).cpu().numpy()
wandb.log({"CosineSimilarity(text_embed,image_embed)": np.mean(original_similarity),
tracker.log({"CosineSimilarity(text_embed,image_embed)": np.mean(original_similarity),
"CosineSimilarity(text_embed,predicted_image_embed)":np.mean(predicted_similarity),
"CosineSimilarity(orig_image_embed,predicted_image_embed)":np.mean(predicted_img_similarity),
"CosineSimilarity(text_embed,predicted_unrelated_embed)": np.mean(unrelated_similarity),
@@ -124,48 +142,67 @@ def train(image_embed_dim,
dropout=0.05,
amp=False):
# DiffusionPriorNetwork
# diffusion prior network
prior_network = DiffusionPriorNetwork(
dim = image_embed_dim,
depth = dpn_depth,
dim_head = dpn_dim_head,
heads = dpn_heads,
attn_dropout = dropout,
ff_dropout = dropout,
normformer = dp_normformer).to(device)
dim = image_embed_dim,
depth = dpn_depth,
dim_head = dpn_dim_head,
heads = dpn_heads,
attn_dropout = dropout,
ff_dropout = dropout,
normformer = dp_normformer
)
# DiffusionPrior with text embeddings and image embeddings pre-computed
# diffusion prior with text embeddings and image embeddings pre-computed
diffusion_prior = DiffusionPrior(
net = prior_network,
clip = clip,
image_embed_dim = image_embed_dim,
timesteps = dp_timesteps,
cond_drop_prob = dp_cond_drop_prob,
loss_type = dp_loss_type,
condition_on_text_encodings = dp_condition_on_text_encodings).to(device)
net = prior_network,
clip = clip,
image_embed_dim = image_embed_dim,
timesteps = dp_timesteps,
cond_drop_prob = dp_cond_drop_prob,
loss_type = dp_loss_type,
condition_on_text_encodings = dp_condition_on_text_encodings
)
# Load pre-trained model from DPRIOR_PATH
if RESUME:
diffusion_prior=load_diffusion_model(DPRIOR_PATH,device)
wandb.init( entity=wandb_entity, project=wandb_project, config=config)
diffusion_prior, loaded_obj = load_diffusion_model(DPRIOR_PATH, device)
tracker.init(entity = wandb_entity, project = wandb_project, config = config)
# diffusion prior trainer
trainer = DiffusionPriorTrainer(
diffusion_prior = diffusion_prior,
lr = learning_rate,
wd = weight_decay,
max_grad_norm = max_grad_norm,
amp = amp,
).to(device)
# load optimizer and scaler
if RESUME:
trainer.optimizer.load_state_dict(loaded_obj['optimizer'])
trainer.scaler.load_state_dict(loaded_obj['scaler'])
# Create save_path if it doesn't exist
if not os.path.exists(save_path):
os.makedirs(save_path)
Path(save_path).mkdir(exist_ok = True, parents = True)
# Get image and text embeddings from the servers
print_ribbon("Downloading embeddings - image and text")
image_reader = EmbeddingReader(embeddings_folder=image_embed_url, file_format="npy")
text_reader = EmbeddingReader(embeddings_folder=text_embed_url, file_format="npy")
num_data_points = text_reader.count
### Training code ###
scaler = GradScaler(enabled=amp)
optimizer = get_optimizer(diffusion_prior.net.parameters(), wd=weight_decay, lr=learning_rate)
epochs = num_epochs
step = 0
t = time.time()
timer = Timer()
epochs = num_epochs
train_set_size = int(train_percent*num_data_points)
val_set_size = int(val_percent*num_data_points)
@@ -176,32 +213,31 @@ def train(image_embed_dim,
for emb_images,emb_text in zip(image_reader(batch_size=batch_size, start=0, end=train_set_size),
text_reader(batch_size=batch_size, start=0, end=train_set_size)):
diffusion_prior.train()
trainer.train()
emb_images_tensor = torch.tensor(emb_images[0]).to(device)
emb_text_tensor = torch.tensor(emb_text[0]).to(device)
with autocast(enabled=amp):
loss = diffusion_prior(text_embed = emb_text_tensor,image_embed = emb_images_tensor)
scaler.scale(loss).backward()
loss = trainer(text_embed = emb_text_tensor, image_embed = emb_images_tensor)
# Samples per second
step+=1
samples_per_sec = batch_size*step/(time.time()-t)
samples_per_sec = batch_size * step / timer.elapsed()
# Save checkpoint every save_interval minutes
if(int(time.time()-t) >= 60*save_interval):
t = time.time()
if(int(timer.elapsed()) >= 60 * save_interval):
timer.reset()
save_diffusion_model(
save_path,
diffusion_prior,
optimizer,
scaler,
trainer.optimizer,
trainer.scaler,
config,
image_embed_dim)
# Log to wandb
wandb.log({"Training loss": loss.item(),
tracker.log({"Training loss": loss.item(),
"Steps": step,
"Samples per second": samples_per_sec})
# Log cosineSim(text_embed,predicted_image_embed) - cosineSim(text_embed,image_embed)
@@ -225,91 +261,109 @@ def train(image_embed_dim,
dp_loss_type,
phase="Validation")
scaler.unscale_(optimizer)
nn.utils.clip_grad_norm_(diffusion_prior.parameters(), max_grad_norm)
scaler.step(optimizer)
scaler.update()
optimizer.zero_grad()
trainer.update()
### Test run ###
test_set_size = int(test_percent*train_set_size)
start=train_set_size+val_set_size
end=num_data_points
start = train_set_size+val_set_size
end = num_data_points
eval_model(diffusion_prior,device,image_reader,text_reader,start,end,batch_size,dp_loss_type,phase="Test")
def main():
parser = argparse.ArgumentParser()
# Logging
parser.add_argument("--wandb-entity", type=str, default="laion")
parser.add_argument("--wandb-project", type=str, default="diffusion-prior")
parser.add_argument("--wandb-dataset", type=str, default="LAION-5B")
parser.add_argument("--wandb-arch", type=str, default="DiffusionPrior")
# URLs for embeddings
parser.add_argument("--image-embed-url", type=str, default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/img_emb/")
parser.add_argument("--text-embed-url", type=str, default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/text_emb/")
# Hyperparameters
parser.add_argument("--learning-rate", type=float, default=1.1e-4)
parser.add_argument("--weight-decay", type=float, default=6.02e-2)
parser.add_argument("--dropout", type=float, default=5e-2)
parser.add_argument("--max-grad-norm", type=float, default=0.5)
parser.add_argument("--batch-size", type=int, default=10**4)
parser.add_argument("--num-epochs", type=int, default=5)
# Image embed dimension
parser.add_argument("--image-embed-dim", type=int, default=768)
# Train-test split
parser.add_argument("--train-percent", type=float, default=0.7)
parser.add_argument("--val-percent", type=float, default=0.2)
parser.add_argument("--test-percent", type=float, default=0.1)
# LAION training(pre-computed embeddings)
# DiffusionPriorNetwork(dpn) parameters
parser.add_argument("--dpn-depth", type=int, default=6)
parser.add_argument("--dpn-dim-head", type=int, default=64)
parser.add_argument("--dpn-heads", type=int, default=8)
# DiffusionPrior(dp) parameters
parser.add_argument("--dp-condition-on-text-encodings", type=bool, default=False)
parser.add_argument("--dp-timesteps", type=int, default=100)
parser.add_argument("--dp-normformer", type=bool, default=False)
parser.add_argument("--dp-cond-drop-prob", type=float, default=0.1)
parser.add_argument("--dp-loss-type", type=str, default="l2")
parser.add_argument("--clip", type=str, default=None)
parser.add_argument("--amp", type=bool, default=False)
# Model checkpointing interval(minutes)
parser.add_argument("--save-interval", type=int, default=30)
parser.add_argument("--save-path", type=str, default="./diffusion_prior_checkpoints")
# Saved model path
parser.add_argument("--pretrained-model-path", type=str, default=None)
@click.command()
@click.option("--wandb-entity", default="laion")
@click.option("--wandb-project", default="diffusion-prior")
@click.option("--wandb-dataset", default="LAION-5B")
@click.option("--wandb-arch", default="DiffusionPrior")
@click.option("--image-embed-url", default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/img_emb/")
@click.option("--text-embed-url", default="https://mystic.the-eye.eu/public/AI/cah/laion5b/embeddings/laion2B-en/text_emb/")
@click.option("--learning-rate", default=1.1e-4)
@click.option("--weight-decay", default=6.02e-2)
@click.option("--dropout", default=5e-2)
@click.option("--max-grad-norm", default=0.5)
@click.option("--batch-size", default=10**4)
@click.option("--num-epochs", default=5)
@click.option("--image-embed-dim", default=768)
@click.option("--train-percent", default=0.7)
@click.option("--val-percent", default=0.2)
@click.option("--test-percent", default=0.1)
@click.option("--dpn-depth", default=6)
@click.option("--dpn-dim-head", default=64)
@click.option("--dpn-heads", default=8)
@click.option("--dp-condition-on-text-encodings", default=False)
@click.option("--dp-timesteps", default=100)
@click.option("--dp-normformer", default=False)
@click.option("--dp-cond-drop-prob", default=0.1)
@click.option("--dp-loss-type", default="l2")
@click.option("--clip", default=None)
@click.option("--amp", default=False)
@click.option("--save-interval", default=30)
@click.option("--save-path", default="./diffusion_prior_checkpoints")
@click.option("--pretrained-model-path", default=None)
def main(
wandb_entity,
wandb_project,
wandb_dataset,
wandb_arch,
image_embed_url,
text_embed_url,
learning_rate,
weight_decay,
dropout,
max_grad_norm,
batch_size,
num_epochs,
image_embed_dim,
train_percent,
val_percent,
test_percent,
dpn_depth,
dpn_dim_head,
dpn_heads,
dp_condition_on_text_encodings,
dp_timesteps,
dp_normformer,
dp_cond_drop_prob,
dp_loss_type,
clip,
amp,
save_interval,
save_path,
pretrained_model_path
):
config = {
"learning_rate": learning_rate,
"architecture": wandb_arch,
"dataset": wandb_dataset,
"weight_decay": weight_decay,
"max_gradient_clipping_norm": max_grad_norm,
"batch_size": batch_size,
"epochs": num_epochs,
"diffusion_prior_network": {
"depth": dpn_depth,
"dim_head": dpn_dim_head,
"heads": dpn_heads,
"normformer": dp_normformer
},
"diffusion_prior": {
"condition_on_text_encodings": dp_condition_on_text_encodings,
"timesteps": dp_timesteps,
"cond_drop_prob": dp_cond_drop_prob,
"loss_type": dp_loss_type,
"clip": clip
}
}
args = parser.parse_args()
config = ({"learning_rate": args.learning_rate,
"architecture": args.wandb_arch,
"dataset": args.wandb_dataset,
"weight_decay":args.weight_decay,
"max_gradient_clipping_norm":args.max_grad_norm,
"batch_size":args.batch_size,
"epochs": args.num_epochs,
"diffusion_prior_network":{"depth":args.dpn_depth,
"dim_head":args.dpn_dim_head,
"heads":args.dpn_heads,
"normformer":args.dp_normformer},
"diffusion_prior":{"condition_on_text_encodings": args.dp_condition_on_text_encodings,
"timesteps": args.dp_timesteps,
"cond_drop_prob":args.dp_cond_drop_prob,
"loss_type":args.dp_loss_type,
"clip":args.clip}
})
RESUME = False
# Check if DPRIOR_PATH exists(saved model path)
DPRIOR_PATH = args.pretrained_model_path
if(DPRIOR_PATH is not None):
RESUME = True
else:
wandb.init(
entity=args.wandb_entity,
project=args.wandb_project,
config=config)
RESUME = exists(DPRIOR_PATH)
if not RESUME:
tracker.init(
entity = wandb_entity,
project = wandb_project,
config = config
)
# Obtain the utilized device.
@@ -319,36 +373,36 @@ def main():
torch.cuda.set_device(device)
# Training loop
train(args.image_embed_dim,
args.image_embed_url,
args.text_embed_url,
args.batch_size,
args.train_percent,
args.val_percent,
args.test_percent,
args.num_epochs,
args.dp_loss_type,
args.clip,
args.dp_condition_on_text_encodings,
args.dp_timesteps,
args.dp_normformer,
args.dp_cond_drop_prob,
args.dpn_depth,
args.dpn_dim_head,
args.dpn_heads,
args.save_interval,
args.save_path,
train(image_embed_dim,
image_embed_url,
text_embed_url,
batch_size,
train_percent,
val_percent,
test_percent,
num_epochs,
dp_loss_type,
clip,
dp_condition_on_text_encodings,
dp_timesteps,
dp_normformer,
dp_cond_drop_prob,
dpn_depth,
dpn_dim_head,
dpn_heads,
save_interval,
save_path,
device,
RESUME,
DPRIOR_PATH,
config,
args.wandb_entity,
args.wandb_project,
args.learning_rate,
args.max_grad_norm,
args.weight_decay,
args.dropout,
args.amp)
wandb_entity,
wandb_project,
learning_rate,
max_grad_norm,
weight_decay,
dropout,
amp)
if __name__ == "__main__":
main()
main()