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Update nanodet_plus_head.py #573

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@rotorliu rotorliu commented Aug 8, 2024

修复多GPU情况下,len(pos_inds) == 0时(当前Batch中的所有图像中均没有检测框真值),reduce_mean不执行导致的dist.all_reduce空等待,卡死的问题。

修复多GPU情况下,len(pos_inds) == 0时(当前Batch中的所有图像中均没有检测框真值),reduce_mean不执行导致的dist.all_reduce空等待,卡死的问题。
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