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vacancy avatar vacancy commented on August 18, 2024

Hi,

Could you please add more detail on this? For example,

What do you mean by “much worse” than the original BatchNorm.
Also, please also check the hyperparameters: are you using the same hyperparameters for all implementations? This includes the batch size, learning rate, and especially the parameters for the BN layers (momentum, eps, etc.)
If you are using a larger batch size due to multi gpu, please scale up the lr.

from synchronized-batchnorm-pytorch.

charlesCXK avatar charlesCXK commented on August 18, 2024

Hi,
I use the same hyperparameters for all implementations. In order to achieve this, I use the following command to replace BatchNorm function:
BatchNorm2d = xxx, where xxx is the batchnorm function I use.

I test three BatchNorm functions on the NYU Depth V2 dataset, (semantic segmantation task), and here is their performance:

  • Inplace ABN: Mean IoU ≈ 0.49

  • nn.BatchNorm2d: Mean IoU < 0.46

  • Your convert_model function: Mean IoU < 0.46, and a little smaller than nn.BatchNorm2d

from synchronized-batchnorm-pytorch.

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