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infer_pruned.py
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infer_pruned.py
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# https://github.com/pytorch/vision/blob/master/torchvision/models/__init__.py
import argparse
import os
import shutil
import pdb, time
from collections import OrderedDict
import torch
import torch.nn as nn
from torch.autograd import Variable
import torch.nn.parallel
import torch.backends.cudnn as cudnn
import torch.optim
import torch.utils.data
import torchvision.transforms as transforms
import torchvision.datasets as datasets
# from utils import convert_secs2time, time_string, time_file_str
import models
import numpy as np
model_names = sorted(name for name in models.__dict__
if name.islower() and not name.startswith("__")
and callable(models.__dict__[name]))
parser = argparse.ArgumentParser(description='PyTorch ImageNet Training')
parser.add_argument('data', metavar='DIR', help='path to dataset')
parser.add_argument('--save_dir', type=str, default='./', help='Folder to save checkpoints and log.')
parser.add_argument('--arch', '-a', metavar='ARCH', default='resnet18', choices=model_names,
help='model architecture: ' + ' | '.join(model_names) + ' (default: resnet18)')
parser.add_argument('-j', '--workers', default=4, type=int, metavar='N',
help='number of data loading workers (default: 4)')
parser.add_argument('-b', '--batch-size', default=256, type=int, metavar='N', help='mini-batch size (default: 256)')
parser.add_argument('--lr', '--learning-rate', default=0.1, type=float, metavar='LR', help='initial learning rate')
parser.add_argument('--print-freq', '-p', default=5, type=int, metavar='N', help='print frequency (default: 100)')
parser.add_argument('--resume', default='', type=str, metavar='PATH', help='path to latest checkpoint (default: none)')
# compress rate
parser.add_argument('--rate', type=float, default=0.9, help='compress rate of model')
parser.add_argument('--epoch_prune', type=int, default=1, help='compress layer of model')
parser.add_argument('--skip_downsample', type=int, default=1, help='compress layer of model')
parser.add_argument('-e', '--evaluate', dest='evaluate', action='store_true', help='evaluate model on validation set')
parser.add_argument('--eval_small', dest='eval_small', action='store_true', help='whether a big or small model')
parser.add_argument('--small_model', default='', type=str, metavar='PATH', help='path to latest checkpoint (default: none)')
args = parser.parse_args()
args.use_cuda = torch.cuda.is_available()
def main():
best_prec1 = 0
if not os.path.isdir(args.save_dir):
os.makedirs(args.save_dir)
log = open(os.path.join(args.save_dir, 'gpu-time.{}.log'.format(args.arch)), 'w')
# create model
print_log("=> creating model '{}'".format(args.arch), log)
model = models.__dict__[args.arch](pretrained=False)
print_log("=> Model : {}".format(model), log)
print_log("=> parameter : {}".format(args), log)
print_log("Compress Rate: {}".format(args.rate), log)
print_log("Epoch prune: {}".format(args.epoch_prune), log)
print_log("Skip downsample : {}".format(args.skip_downsample), log)
# optionally resume from a checkpoint
if args.resume:
if os.path.isfile(args.resume):
print_log("=> loading checkpoint '{}'".format(args.resume), log)
checkpoint = torch.load(args.resume)
args.start_epoch = checkpoint['epoch']
best_prec1 = checkpoint['best_prec1']
state_dict = checkpoint['state_dict']
state_dict = remove_module_dict(state_dict)
model.load_state_dict(state_dict)
print_log("=> loaded checkpoint '{}' (epoch {})".format(args.resume, checkpoint['epoch']), log)
else:
print_log("=> no checkpoint found at '{}'".format(args.resume), log)
cudnn.benchmark = True
# Data loading code
valdir = os.path.join(args.data, 'val')
normalize = transforms.Normalize(mean=[0.485, 0.456, 0.406],
std=[0.229, 0.224, 0.225])
val_loader = torch.utils.data.DataLoader(
datasets.ImageFolder(valdir, transforms.Compose([
# transforms.Scale(256),
transforms.Resize(256),
transforms.CenterCrop(224),
transforms.ToTensor(),
normalize,
])),
batch_size=args.batch_size, shuffle=False,
num_workers=args.workers, pin_memory=True)
criterion = nn.CrossEntropyLoss().cuda()
if args.evaluate:
print_log("eval true", log)
if not args.eval_small:
big_model = model.cuda()
print_log('Evaluate: big model', log)
print_log('big model accu: {}'.format(validate(val_loader, big_model, criterion, log)), log)
else:
print_log('Evaluate: small model', log)
if args.small_model:
if os.path.isfile(args.small_model):
print_log("=> loading small model '{}'".format(args.small_model), log)
small_model = torch.load(args.small_model)
for x, y in zip(small_model.named_parameters(), model.named_parameters()):
print_log("name of layer: {}\n\t *** small model {}\n\t *** big model {}".format(x[0], x[1].size(),
y[1].size()), log)
if args.use_cuda:
small_model = small_model.cuda()
print_log('small model accu: {}'.format(validate(val_loader, small_model, criterion, log)), log)
else:
print_log("=> no small model found at '{}'".format(args.small_model), log)
return
def validate(val_loader, model, criterion, log):
batch_time = AverageMeter()
losses = AverageMeter()
top1 = AverageMeter()
top5 = AverageMeter()
# switch to evaluate mode
model.eval()
end = time.time()
for i, (input, target) in enumerate(val_loader):
# target = target.cuda(async=True)
if args.use_cuda:
input, target = input.cuda(), target.cuda(async=True)
input_var = torch.autograd.Variable(input, volatile=True)
target_var = torch.autograd.Variable(target, volatile=True)
# compute output
output = model(input_var)
loss = criterion(output, target_var)
# measure accuracy and record loss
prec1, prec5 = accuracy(output.data, target, topk=(1, 5))
losses.update(loss.data[0], input.size(0))
top1.update(prec1[0], input.size(0))
top5.update(prec5[0], input.size(0))
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if i % args.print_freq == 0:
print_log('Test: [{0}/{1}]\t'
'Time {batch_time.val:.3f} ({batch_time.avg:.3f})\t'
'Loss {loss.val:.4f} ({loss.avg:.4f})\t'
'Prec@1 {top1.val:.3f} ({top1.avg:.3f})\t'
'Prec@5 {top5.val:.3f} ({top5.avg:.3f})'.format(
i, len(val_loader), batch_time=batch_time, loss=losses,
top1=top1, top5=top5), log)
print_log(' * Prec@1 {top1.avg:.3f} Prec@5 {top5.avg:.3f} Error@1 {error1:.3f}'.format(top1=top1, top5=top5,
error1=100 - top1.avg), log)
return top1.avg
def print_log(print_string, log):
print("{}".format(print_string))
log.write('{}\n'.format(print_string))
log.flush()
class AverageMeter(object):
"""Computes and stores the average and current value"""
def __init__(self):
self.reset()
def reset(self):
self.val = 0
self.avg = 0
self.sum = 0
self.count = 0
def update(self, val, n=1):
self.val = val
self.sum += val * n
self.count += n
self.avg = self.sum / self.count
def accuracy(output, target, topk=(1,)):
"""Computes the precision@k for the specified values of k"""
maxk = max(topk)
batch_size = target.size(0)
_, pred = output.topk(maxk, 1, True, True)
pred = pred.t()
correct = pred.eq(target.view(1, -1).expand_as(pred))
res = []
for k in topk:
correct_k = correct[:k].view(-1).float().sum(0, keepdim=True)
res.append(correct_k.mul_(100.0 / batch_size))
return res
def remove_module_dict(state_dict):
new_state_dict = OrderedDict()
for k, v in state_dict.items():
name = k[7:] # remove `module.`
new_state_dict[name] = v
return new_state_dict
if __name__ == '__main__':
main()