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pytorch-image-models/validate.py

329 lines
14 KiB

#!/usr/bin/env python
""" ImageNet Validation Script
This is intended to be a lean and easily modifiable ImageNet validation script for evaluating pretrained
models or training checkpoints against ImageNet or similarly organized image datasets. It prioritizes
canonical PyTorch, standard Python style, and good performance. Repurpose as you see fit.
Hacked together by Ross Wightman (https://github.com/rwightman)
"""
import argparse
import os
import csv
import glob
import time
import logging
import torch
import torch.nn as nn
import torch.nn.parallel
from collections import OrderedDict
from contextlib import suppress
from timm.models import create_model, apply_test_time_pool, load_checkpoint, is_model, list_models
from timm.data import ImageDataset, create_loader, resolve_data_config, RealLabelsImagenet
from timm.utils import accuracy, AverageMeter, natural_key, setup_default_logging, set_jit_legacy
has_apex = False
try:
from apex import amp
has_apex = True
except ImportError:
pass
has_native_amp = False
try:
if getattr(torch.cuda.amp, 'autocast') is not None:
has_native_amp = True
except AttributeError:
pass
torch.backends.cudnn.benchmark = True
_logger = logging.getLogger('validate')
parser = argparse.ArgumentParser(description='PyTorch ImageNet Validation')
parser.add_argument('data', metavar='DIR',
help='path to dataset')
parser.add_argument('--model', '-m', metavar='MODEL', default='dpn92',
help='model architecture (default: dpn92)')
parser.add_argument('-j', '--workers', default=4, type=int, metavar='N',
help='number of data loading workers (default: 2)')
parser.add_argument('-b', '--batch-size', default=256, type=int,
metavar='N', help='mini-batch size (default: 256)')
parser.add_argument('--img-size', default=None, type=int,
metavar='N', help='Input image dimension, uses model default if empty')
parser.add_argument('--crop-pct', default=None, type=float,
metavar='N', help='Input image center crop pct')
parser.add_argument('--mean', type=float, nargs='+', default=None, metavar='MEAN',
help='Override mean pixel value of dataset')
parser.add_argument('--std', type=float, nargs='+', default=None, metavar='STD',
help='Override std deviation of of dataset')
parser.add_argument('--interpolation', default='', type=str, metavar='NAME',
help='Image resize interpolation type (overrides model)')
parser.add_argument('--num-classes', type=int, default=None,
help='Number classes in dataset')
parser.add_argument('--class-map', default='', type=str, metavar='FILENAME',
help='path to class to idx mapping file (default: "")')
parser.add_argument('--gp', default=None, type=str, metavar='POOL',
help='Global pool type, one of (fast, avg, max, avgmax, avgmaxc). Model default if None.')
parser.add_argument('--log-freq', default=10, type=int,
metavar='N', help='batch logging frequency (default: 10)')
parser.add_argument('--checkpoint', default='', type=str, metavar='PATH',
help='path to latest checkpoint (default: none)')
parser.add_argument('--pretrained', dest='pretrained', action='store_true',
help='use pre-trained model')
parser.add_argument('--num-gpu', type=int, default=1,
help='Number of GPUS to use')
parser.add_argument('--no-test-pool', dest='no_test_pool', action='store_true',
help='disable test time pool')
parser.add_argument('--no-prefetcher', action='store_true', default=False,
help='disable fast prefetcher')
parser.add_argument('--pin-mem', action='store_true', default=False,
help='Pin CPU memory in DataLoader for more efficient (sometimes) transfer to GPU.')
parser.add_argument('--channels-last', action='store_true', default=False,
help='Use channels_last memory layout')
parser.add_argument('--amp', action='store_true', default=False,
help='Use AMP mixed precision. Defaults to Apex, fallback to native Torch AMP.')
parser.add_argument('--apex-amp', action='store_true', default=False,
help='Use NVIDIA Apex AMP mixed precision')
parser.add_argument('--native-amp', action='store_true', default=False,
help='Use Native Torch AMP mixed precision')
parser.add_argument('--tf-preprocessing', action='store_true', default=False,
help='Use Tensorflow preprocessing pipeline (require CPU TF installed')
parser.add_argument('--use-ema', dest='use_ema', action='store_true',
help='use ema version of weights if present')
parser.add_argument('--torchscript', dest='torchscript', action='store_true',
help='convert model torchscript for inference')
parser.add_argument('--legacy-jit', dest='legacy_jit', action='store_true',
help='use legacy jit mode for pytorch 1.5/1.5.1/1.6 to get back fusion performance')
parser.add_argument('--results-file', default='', type=str, metavar='FILENAME',
help='Output csv file for validation results (summary)')
parser.add_argument('--real-labels', default='', type=str, metavar='FILENAME',
help='Real labels JSON file for imagenet evaluation')
parser.add_argument('--valid-labels', default='', type=str, metavar='FILENAME',
help='Valid label indices txt file for validation of partial label space')
def validate(args):
# might as well try to validate something
args.pretrained = args.pretrained or not args.checkpoint
args.prefetcher = not args.no_prefetcher
amp_autocast = suppress # do nothing
if args.amp:
if has_apex:
args.apex_amp = True
elif has_native_amp:
args.native_amp = True
else:
_logger.warning("Neither APEX or Native Torch AMP is available, using FP32.")
assert not args.apex_amp or not args.native_amp, "Only one AMP mode should be set."
if args.native_amp:
amp_autocast = torch.cuda.amp.autocast
if args.legacy_jit:
set_jit_legacy()
# create model
model = create_model(
args.model,
pretrained=args.pretrained,
num_classes=args.num_classes,
in_chans=3,
global_pool=args.gp,
scriptable=args.torchscript)
if args.checkpoint:
load_checkpoint(model, args.checkpoint, args.use_ema)
param_count = sum([m.numel() for m in model.parameters()])
_logger.info('Model %s created, param count: %d' % (args.model, param_count))
data_config = resolve_data_config(vars(args), model=model)
model, test_time_pool = (model, False) if args.no_test_pool else apply_test_time_pool(model, data_config)
if args.torchscript:
torch.jit.optimized_execution(True)
model = torch.jit.script(model)
model = model.cuda()
if args.apex_amp:
model = amp.initialize(model, opt_level='O1')
if args.channels_last:
model = model.to(memory_format=torch.channels_last)
if args.num_gpu > 1:
model = torch.nn.DataParallel(model, device_ids=list(range(args.num_gpu)))
criterion = nn.CrossEntropyLoss().cuda()
dataset = ImageDataset(args.data, load_bytes=args.tf_preprocessing, class_map=args.class_map)
if args.valid_labels:
with open(args.valid_labels, 'r') as f:
valid_labels = {int(line.rstrip()) for line in f}
valid_labels = [i in valid_labels for i in range(args.num_classes)]
else:
valid_labels = None
if args.real_labels:
real_labels = RealLabelsImagenet(dataset.filenames(basename=True), real_json=args.real_labels)
else:
real_labels = None
crop_pct = 1.0 if test_time_pool else data_config['crop_pct']
loader = create_loader(
dataset,
input_size=data_config['input_size'],
batch_size=args.batch_size,
use_prefetcher=args.prefetcher,
interpolation=data_config['interpolation'],
mean=data_config['mean'],
std=data_config['std'],
num_workers=args.workers,
crop_pct=crop_pct,
pin_memory=args.pin_mem,
tf_preprocessing=args.tf_preprocessing)
batch_time = AverageMeter()
losses = AverageMeter()
top1 = AverageMeter()
top5 = AverageMeter()
model.eval()
with torch.no_grad():
# warmup, reduce variability of first batch time, especially for comparing torchscript vs non
input = torch.randn((args.batch_size,) + data_config['input_size']).cuda()
if args.channels_last:
input = input.contiguous(memory_format=torch.channels_last)
model(input)
end = time.time()
for batch_idx, (input, target) in enumerate(loader):
if args.no_prefetcher:
target = target.cuda()
input = input.cuda()
if args.channels_last:
input = input.contiguous(memory_format=torch.channels_last)
# compute output
with amp_autocast():
output = model(input)
if valid_labels is not None:
output = output[:, valid_labels]
loss = criterion(output, target)
if real_labels is not None:
real_labels.add_result(output)
# measure accuracy and record loss
acc1, acc5 = accuracy(output.detach(), target, topk=(1, 5))
losses.update(loss.item(), input.size(0))
top1.update(acc1.item(), input.size(0))
top5.update(acc5.item(), input.size(0))
# measure elapsed time
batch_time.update(time.time() - end)
end = time.time()
if batch_idx % args.log_freq == 0:
_logger.info(
'Test: [{0:>4d}/{1}] '
'Time: {batch_time.val:.3f}s ({batch_time.avg:.3f}s, {rate_avg:>7.2f}/s) '
'Loss: {loss.val:>7.4f} ({loss.avg:>6.4f}) '
'Acc@1: {top1.val:>7.3f} ({top1.avg:>7.3f}) '
'Acc@5: {top5.val:>7.3f} ({top5.avg:>7.3f})'.format(
batch_idx, len(loader), batch_time=batch_time,
rate_avg=input.size(0) / batch_time.avg,
loss=losses, top1=top1, top5=top5))
if real_labels is not None:
# real labels mode replaces topk values at the end
top1a, top5a = real_labels.get_accuracy(k=1), real_labels.get_accuracy(k=5)
else:
top1a, top5a = top1.avg, top5.avg
results = OrderedDict(
top1=round(top1a, 4), top1_err=round(100 - top1a, 4),
top5=round(top5a, 4), top5_err=round(100 - top5a, 4),
param_count=round(param_count / 1e6, 2),
img_size=data_config['input_size'][-1],
cropt_pct=crop_pct,
interpolation=data_config['interpolation'])
_logger.info(' * Acc@1 {:.3f} ({:.3f}) Acc@5 {:.3f} ({:.3f})'.format(
results['top1'], results['top1_err'], results['top5'], results['top5_err']))
return results
def main():
setup_default_logging()
args = parser.parse_args()
model_cfgs = []
model_names = []
if os.path.isdir(args.checkpoint):
# validate all checkpoints in a path with same model
checkpoints = glob.glob(args.checkpoint + '/*.pth.tar')
checkpoints += glob.glob(args.checkpoint + '/*.pth')
model_names = list_models(args.model)
model_cfgs = [(args.model, c) for c in sorted(checkpoints, key=natural_key)]
else:
if args.model == 'all':
# validate all models in a list of names with pretrained checkpoints
args.pretrained = True
model_names = list_models(pretrained=True)
model_cfgs = [(n, '') for n in model_names]
elif not is_model(args.model):
# model name doesn't exist, try as wildcard filter
model_names = list_models(args.model)
model_cfgs = [(n, '') for n in model_names]
if len(model_cfgs):
results_file = args.results_file or './results-all.csv'
_logger.info('Running bulk validation on these pretrained models: {}'.format(', '.join(model_names)))
results = []
try:
start_batch_size = args.batch_size
for m, c in model_cfgs:
batch_size = start_batch_size
args.model = m
args.checkpoint = c
result = OrderedDict(model=args.model)
r = {}
while not r and batch_size >= args.num_gpu:
torch.cuda.empty_cache()
try:
args.batch_size = batch_size
print('Validating with batch size: %d' % args.batch_size)
r = validate(args)
except RuntimeError as e:
if batch_size <= args.num_gpu:
print("Validation failed with no ability to reduce batch size. Exiting.")
raise e
batch_size = max(batch_size // 2, args.num_gpu)
print("Validation failed, reducing batch size by 50%")
result.update(r)
if args.checkpoint:
result['checkpoint'] = args.checkpoint
results.append(result)
except KeyboardInterrupt as e:
pass
results = sorted(results, key=lambda x: x['top1'], reverse=True)
if len(results):
write_results(results_file, results)
else:
validate(args)
def write_results(results_file, results):
with open(results_file, mode='w') as cf:
dw = csv.DictWriter(cf, fieldnames=results[0].keys())
dw.writeheader()
for r in results:
dw.writerow(r)
cf.flush()
if __name__ == '__main__':
main()