Improve dataset download logic

tensorpack/dataflow/dataset/bsds500.py

@@ -10,7 +10,10 @@ from ...utils.fs import download, get_dataset_path
 from ..base import RNGDataFlow
 
 __all__ = ['BSDS500']
+
+
 DATA_URL = "http://www.eecs.berkeley.edu/Research/Projects/CS/vision/grouping/BSR/BSR_bsds500.tgz"
+DATA_SIZE = 70763455
 IMG_W, IMG_H = 481, 321
 
 
@@ -35,7 +38,7 @@ class BSDS500(RNGDataFlow):
         if data_dir is None:
             data_dir = get_dataset_path('bsds500_data')
         if not os.path.isdir(os.path.join(data_dir, 'BSR')):
-            download(DATA_URL, data_dir)
+            download(DATA_URL, data_dir, expect_size=DATA_SIZE)
             filename = DATA_URL.split('/')[-1]
             filepath = os.path.join(data_dir, filename)
             import tarfile

tensorpack/dataflow/dataset/cifar.py

@@ -6,6 +6,7 @@
 import os
 import pickle
 import numpy as np
+import tarfile
 import six
 from six.moves import range
 
@@ -16,13 +17,12 @@ from ..base import RNGDataFlow
 __all__ = ['Cifar10', 'Cifar100']
 
 
-DATA_URL_CIFAR_10 = 'http://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz'
-DATA_URL_CIFAR_100 = 'http://www.cs.toronto.edu/~kriz/cifar-100-python.tar.gz'
+DATA_URL_CIFAR_10 = ('http://www.cs.toronto.edu/~kriz/cifar-10-python.tar.gz', 170498071)
+DATA_URL_CIFAR_100 = ('http://www.cs.toronto.edu/~kriz/cifar-100-python.tar.gz', 169001437)
 
 
 def maybe_download_and_extract(dest_directory, cifar_classnum):
-    """Download and extract the tarball from Alex's website.
-       copied from tensorflow example """
+    """Download and extract the tarball from Alex's website. Copied from tensorflow example """
     assert cifar_classnum == 10 or cifar_classnum == 100
     if cifar_classnum == 10:
         cifar_foldername = 'cifar-10-batches-py'
@@ -33,10 +33,9 @@ def maybe_download_and_extract(dest_directory, cifar_classnum):
         return
     else:
         DATA_URL = DATA_URL_CIFAR_10 if cifar_classnum == 10 else DATA_URL_CIFAR_100
-        download(DATA_URL, dest_directory)
-        filename = DATA_URL.split('/')[-1]
+        filename = DATA_URL[0].split('/')[-1]
         filepath = os.path.join(dest_directory, filename)
-        import tarfile
+        download(DATA_URL[0], dest_directory, expect_size=DATA_URL[1])
         tarfile.open(filepath, 'r:gz').extractall(dest_directory)
 
 

tensorpack/dataflow/dataset/ilsvrc.py

@@ -14,7 +14,7 @@ from ..base import RNGDataFlow
 
 __all__ = ['ILSVRCMeta', 'ILSVRC12', 'ILSVRC12Files']
 
-CAFFE_ILSVRC12_URL = "http://dl.caffe.berkeleyvision.org/caffe_ilsvrc12.tar.gz"
+CAFFE_ILSVRC12_URL = ("http://dl.caffe.berkeleyvision.org/caffe_ilsvrc12.tar.gz", 17858008)
 
 
 class ILSVRCMeta(object):
@@ -53,7 +53,7 @@ class ILSVRCMeta(object):
         return dict(enumerate(lines))
 
     def _download_caffe_meta(self):
-        fpath = download(CAFFE_ILSVRC12_URL, self.dir, expect_size=17858008)
+        fpath = download(CAFFE_ILSVRC12_URL[0], self.dir, expect_size=CAFFE_ILSVRC12_URL[1])
         tarfile.open(fpath, 'r:gz').extractall(self.dir)
 
     def get_image_list(self, name, dir_structure='original'):

tensorpack/graph_builder/utils.py

@@ -8,6 +8,7 @@ import tensorflow as tf
 
 from ..tfutils.varreplace import custom_getter_scope
 from ..tfutils.scope_utils import under_name_scope, cached_name_scope
+from ..tfutils.common import get_tf_version_number
 from ..utils.argtools import call_only_once
 from ..utils import logger
 
@@ -66,13 +67,16 @@ class LeastLoadedDeviceSetter(object):
         self.ps_sizes = [0] * len(self.ps_devices)
 
     def __call__(self, op):
-        def sanitize_name(name):    # tensorflow/tensorflow#11484
-            return tf.DeviceSpec.from_string(name).to_string()
+        if get_tf_version_number() >= 1.8:
+            from tensorflow.python.training.device_util import canonicalize
+        else:
+            def canonicalize(name):    # tensorflow/tensorflow#11484
+                return tf.DeviceSpec.from_string(name).to_string()
 
         if op.device:
             return op.device
         if op.type not in ['Variable', 'VariableV2']:
-            return sanitize_name(self.worker_device)
+            return canonicalize(self.worker_device)
 
         device_index, _ = min(enumerate(
             self.ps_sizes), key=operator.itemgetter(1))
@@ -84,7 +88,7 @@ class LeastLoadedDeviceSetter(object):
 
         self.ps_sizes[device_index] += var_size
 
-        return sanitize_name(device_name)
+        return canonicalize(device_name)
 
     def __str__(self):
         return "LeastLoadedDeviceSetter-{}".format(self.worker_device)

tensorpack/libinfo.py

@@ -8,16 +8,21 @@ try:
     import cv2  # noqa
     if int(cv2.__version__.split('.')[0]) == 3:
         cv2.ocl.setUseOpenCL(False)
-    # check if cv is built with cuda
+    # check if cv is built with cuda or openmp
     info = cv2.getBuildInformation().split('\n')
     for line in info:
-        if 'use cuda' in line.lower():
-            answer = line.split()[-1].lower()
-            if answer == 'yes':
+        splits = line.split()
+        if not len(splits):
+            continue
+        answer = splits[-1].lower()
+        if answer in ['yes', 'no']:
+            if 'cuda' in line.lower() and answer == 'yes':
                 # issue#1197
                 print("OpenCV is built with CUDA support. "
                       "This may cause slow initialization or sometimes segfault with TensorFlow.")
-            break
+        if answer == 'openmp':
+            print("OpenCV is built with OpenMP support. This usually results in poor performance. For details, see "
+                  "https://github.com/tensorpack/benchmarks/blob/master/ImageNet/benchmark-opencv-resize.py")
 except (ImportError, TypeError):
     pass
 
@@ -41,9 +46,7 @@ os.environ['TF_GPU_THREAD_COUNT'] = '2'
 try:
     import tensorflow as tf  # noqa
     _version = tf.__version__.split('.')
-    assert int(_version[0]) >= 1, "TF>=1.0 is required!"
-    if int(_version[1]) < 3:
-        print("TF<1.3 support will be removed after 2018-03-15! Actually many examples already require TF>=1.3.")
+    assert int(_version[0]) >= 1 and int(_version[1]) >= 3, "TF>=1.3 is required!"
     _HAS_TF = True
 except ImportError:
     _HAS_TF = False

tensorpack/utils/fs.py

@@ -13,7 +13,7 @@ __all__ = ['mkdir_p', 'download', 'recursive_walk', 'get_dataset_path']
 
 
 def mkdir_p(dirname):
-    """ Make a dir recursively, but do nothing if the dir exists
+    """ Like "mkdir -p", make a dir recursively, but do nothing if the dir exists
 
     Args:
         dirname(str):
@@ -38,6 +38,13 @@ def download(url, dir, filename=None, expect_size=None):
         filename = url.split('/')[-1]
     fpath = os.path.join(dir, filename)
 
+    if os.path.isfile(fpath):
+        if expect_size is not None and os.stat(fpath).st_size == expect_size:
+            logger.info("File {} exists! Skip download.".format(filename))
+            return fpath
+        else:
+            logger.warn("File {} exists. Will overwrite with a new download!".format(filename))
+
     def hook(t):
         last_b = [0]
 
@@ -62,7 +69,7 @@ def download(url, dir, filename=None, expect_size=None):
         logger.error("You may have downloaded a broken file, or the upstream may have modified the file.")
 
     # TODO human-readable size
-    print('Succesfully downloaded ' + filename + ". " + str(size) + ' bytes.')
+    logger.info('Succesfully downloaded ' + filename + ". " + str(size) + ' bytes.')
     return fpath