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Added update_parameters to EMA to fix calculation #4406

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Merged
merged 1 commit into from
Sep 14, 2021
Merged

Added update_parameters to EMA to fix calculation #4406

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11 changes: 11 additions & 0 deletions references/classification/utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -172,6 +172,17 @@ def __init__(self, model, decay, device='cpu'):
decay * avg_model_param + (1 - decay) * model_param)
super().__init__(model, device, ema_avg)

def update_parameters(self, model):
for p_swa, p_model in zip(self.module.state_dict().values(), model.state_dict().values()):
device = p_swa.device
p_model_ = p_model.detach().to(device)
if self.n_averaged == 0:
p_swa.detach().copy_(p_model_)
else:
p_swa.detach().copy_(self.avg_fn(p_swa.detach(), p_model_,
self.n_averaged.to(device)))
self.n_averaged += 1


def accuracy(output, target, topk=(1,)):
"""Computes the accuracy over the k top predictions for the specified values of k"""
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