""" SimCLR self-supervision training
"""
import argparse
import json
import os
import sys
import time
from tqdm import tqdm
import torch
import torchinfo
sys.path.append(os.getcwd())
import utilities.runUtils as rutl
import utilities.logUtils as lutl
from algorithms.simclr import SimCLR, LARS
from datacode.natural_image_data import Cifar100Dataset
from datacode.ultrasound_data import FetalUSFramesDataset
from datacode.augmentations import SimCLRTransform
print(f"Pytorch version: {torch.__version__}")
print(f"cuda version: {torch.version.cuda}")
device = 'cuda' if torch.cuda.is_available() else 'cpu'
print("Device Used:", device)
###============================= Configure and Setup ===========================
CFG = rutl.ObjDict(
use_amp = True, #automatic Mixed precision
datapath = "/home/mothilal.asokan/Downloads/HC701/Project/US-Fetal-Video-Frames_V1-1/train-all-frames.hdf5",
valdatapath = "/home/mothilal.asokan/Downloads/HC701/Project/US-Fetal-Video-Frames_V1-1/valid-all-frames.hdf5",
skip_count = 5,
epochs = 10,
batch_size = 160,
workers = 24,
image_size = 256,
weight_decay = 1e-4,
temp = 0.5,
lr = 0.3,
featx_arch = "resnet50", # "resnet34/50/101"
featx_pretrain = None, # "IMGNET-1K" or None
projector = [512, 128],
print_freq_step = 10, #steps
ckpt_freq_epoch = 5, #epochs
valid_freq_epoch = 5, #epochs
disable_tqdm = False, #True--> to disable
checkpoint_dir= "hypotheses/-dummy/ssl-simclr/",
resume_training = True,
)
## --------
parser = argparse.ArgumentParser(description='SimCLR Training')
parser.add_argument('--load-json', type=str, metavar='JSON',
help='Load settings from file in json format. Command line options override values in python file.')
args = parser.parse_args()
if args.load_json:
with open(args.load_json, 'rt') as f:
CFG.__dict__.update(json.load(f))
### ----------------------------------------------------------------------------
CFG.gLogPath = CFG.checkpoint_dir
CFG.gWeightPath = CFG.checkpoint_dir + '/weights/'
### ============================================================================
def getDataLoaders():
transform_obj = SimCLRTransform(image_size=CFG.image_size)
traindataset = FetalUSFramesDataset( hdf5_file= CFG.datapath,
transform = transform_obj,
load2ram = False, frame_skip=CFG.skip_count)
trainloader = torch.utils.data.DataLoader( traindataset, shuffle=True,
batch_size=CFG.batch_size, num_workers=CFG.workers,
pin_memory=True,drop_last=True )
# val_transform_obj = SimCLREvalDataTransform(image_size=CFG.image_size)
validdataset = FetalUSFramesDataset( hdf5_file= CFG.valdatapath,
transform = transform_obj,
load2ram = False, frame_skip=CFG.skip_count)
validloader = torch.utils.data.DataLoader( validdataset, shuffle=False,
batch_size=CFG.batch_size, num_workers=CFG.workers,
pin_memory=True, drop_last=True)
lutl.LOG2DICTXT({"TRAIN DatasetClass":traindataset.get_info(),
"TransformsClass": str(transform_obj.get_composition()),
}, CFG.gLogPath +'/misc.txt')
lutl.LOG2DICTXT({"VALID DatasetClass":validdataset.get_info(),
"TransformsClass": str(transform_obj.get_composition()),
}, CFG.gLogPath +'/misc.txt')
return trainloader, validloader
def getModelnOptimizer():
model = SimCLR(featx_arch=CFG.featx_arch,
projector_sizes=CFG.projector,
batch_size=CFG.batch_size,
temp=CFG.temp,
pretrained=CFG.featx_pretrain).to(device)
optimizer = LARS(model.parameters(), lr=CFG.lr, weight_decay=CFG.weight_decay,
momentum=0.9)
model_info = torchinfo.summary(model, 2*[(CFG.batch_size, 3, CFG.image_size, CFG.image_size)],
verbose=0)
lutl.LOG2TXT(model_info, CFG.gLogPath +'/misc.txt', console= False)
return model.to(device), optimizer
### ----------------------------------------------------------------------------
def simple_main():
### SETUP
rutl.START_SEED()
torch.cuda.device(device)
torch.backends.cudnn.benchmark = True
if os.path.exists(CFG.checkpoint_dir) and (not CFG.resume_training):
raise Exception("CheckPoint folder already exists and restart_training not enabled; Somethings Wrong!")
if not os.path.exists(CFG.gWeightPath): os.makedirs(CFG.gWeightPath)
with open(CFG.gLogPath+"/exp_config.json", 'a') as f:
json.dump(vars(CFG), f, indent=4)
### DATA ACCESS
trainloader, validloader = getDataLoaders()
### MODEL, OPTIM
model, optimizer = getModelnOptimizer()
scheduler = torch.optim.lr_scheduler.CosineAnnealingLR(optimizer,
len(trainloader), eta_min=0,last_epoch=-1)
## Automatically resume from checkpoint if it exists and enabled
ckpt = None
if CFG.resume_training:
try: ckpt = torch.load(CFG.gWeightPath+'/checkpoint-1.pth', map_location='cpu')
except:
try:ckpt = torch.load(CFG.gWeightPath+'/checkpoint-0.pth', map_location='cpu')
except: print("Check points are not loadable. Starting fresh...")
if ckpt:
start_epoch = ckpt['epoch']
model.load_state_dict(ckpt['model'])
optimizer.load_state_dict(ckpt['optimizer'])
lutl.LOG2TXT(f"Restarting Training from EPOCH:{start_epoch} of {CFG.checkpoint_dir}", CFG.gLogPath +'/misc.txt')
else:
start_epoch = 0
### MODEL TRAINING
start_time = time.time()
best_loss = float('inf')
wgt_suf = 0 # foolproof savetime crash
if CFG.use_amp: scaler = torch.cuda.amp.GradScaler() # for mixed precision
for epoch in range(start_epoch, CFG.epochs):
## ---- Training Routine ----
t_running_loss_ = 0
model.train()
for step, (y1, y2) in tqdm(enumerate(trainloader,
start=epoch * len(trainloader)),
disable=CFG.disable_tqdm):
y1 = y1.to(device, non_blocking=True)
y2 = y2.to(device, non_blocking=True)
optimizer.zero_grad()
if CFG.use_amp: ## with mixed precision
with torch.cuda.amp.autocast():
loss = model.forward(y1, y2)
scaler.scale(loss).backward()
scaler.step(optimizer)
scaler.update()
else:
loss = model.forward(y1, y2)
loss.backward()
optimizer.step()
t_running_loss_+=loss.item()
if step % CFG.print_freq_step == 0:
stats = dict(epoch=epoch, step=step,
lr_weights=optimizer.param_groups[0]['lr'],
step_loss=loss.item(),
time=int(time.time() - start_time))
lutl.LOG2DICTXT(stats, CFG.checkpoint_dir +'/train-stats.txt')
train_epoch_loss = t_running_loss_/len(trainloader)
scheduler.step()
# save checkpoint
if (epoch+1) % CFG.ckpt_freq_epoch == 0:
wgt_suf = (wgt_suf+1) %2
state = dict(epoch=epoch, model=model.state_dict(),
optimizer=optimizer.state_dict())
torch.save(state, CFG.gWeightPath +f'/checkpoint-{wgt_suf}.pth')
## ---- Validation Routine ----
if (epoch+1) % CFG.valid_freq_epoch == 0:
model.eval()
v_running_loss_ = 0
with torch.no_grad():
for (y1, y2) in tqdm(validloader, total=len(validloader),
disable=CFG.disable_tqdm):
y1 = y1.to(device, non_blocking=True)
y2 = y2.to(device, non_blocking=True)
loss = model.forward(y1, y2)
v_running_loss_ += loss.item()
valid_epoch_loss = v_running_loss_/len(validloader)
# just check
best_flag = False
if valid_epoch_loss < best_loss:
best_flag = True
best_loss = valid_epoch_loss
v_stats = dict(epoch=epoch, best=best_flag, wgt_suf=wgt_suf,
train_loss=train_epoch_loss,
valid_loss=valid_epoch_loss)
lutl.LOG2DICTXT(v_stats, CFG.gLogPath+'/valid-stats.txt')
if __name__ == '__main__':
simple_main()
