Stride is Wrong

[KaleabTessera]

Following from the model graph for wideresnet50 with depth 28 and widen_factor = 10, layer2.0.conv2 and layer3.0.conv2 have stride - stride=(2, 2). It should be layer2.0.conv1 and layer3.0.conv1 that have stride=(2, 2), while layer2.0.conv2 and layer3.0.conv2 should have stride stride=(1, 1).

Here is the model graph:

Resnet(
  (model): Wide_ResNet(
    (conv1): Conv2d(3, 16, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
    (layer1): Sequential(
      (0): wide_basic(
        (bn1): BatchNorm2d(16, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(16, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential(
          (0): Conv2d(16, 160, kernel_size=(1, 1), stride=(1, 1))
        )
      )
      (1): wide_basic(
        (bn1): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (2): wide_basic(
        (bn1): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (3): wide_basic(
        (bn1): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(160, 160, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
    )
    (layer2): Sequential(
      (0): wide_basic(
        (bn1): BatchNorm2d(160, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(160, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(320, 320, kernel_size=(3, 3), stride=(2, 2), padding=(1, 1))
        (shortcut): Sequential(
          (0): Conv2d(160, 320, kernel_size=(1, 1), stride=(2, 2))
        )
      )
      (1): wide_basic(
        (bn1): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (2): wide_basic(
        (bn1): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (3): wide_basic(
        (bn1): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(320, 320, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
    )
    (layer3): Sequential(
      (0): wide_basic(
        (bn1): BatchNorm2d(320, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(320, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(640, 640, kernel_size=(3, 3), stride=(2, 2), padding=(1, 1))
        (shortcut): Sequential(
          (0): Conv2d(320, 640, kernel_size=(1, 1), stride=(2, 2))
        )
      )
      (1): wide_basic(
        (bn1): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (2): wide_basic(
        (bn1): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
      (3): wide_basic(
        (bn1): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu1): ReLU()
        (conv1): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (dropout): Dropout(p=0, inplace=False)
        (bn2): BatchNorm2d(640, eps=1e-05, momentum=0.1, affine=True, track_running_stats=True)
        (relu2): ReLU()
        (conv2): Conv2d(640, 640, kernel_size=(3, 3), stride=(1, 1), padding=(1, 1))
        (shortcut): Sequential()
      )
    )
    (bn1): BatchNorm2d(640, eps=1e-05, momentum=0.9, affine=True, track_running_stats=True)
    (relu1): ReLU()
    (linear): Linear(in_features=640, out_features=100, bias=True)
  )
)

[rederyang]

Yeah, agree with @KaleabTessera. BTW, this makes the net run a little slower.