mobilenetv2训练时，设置多gpu报错：multi-gpu execution not available - rebuild with USE_NCCL

mobilenetv2训练时，设置多gpu报错：

解决方法：
https://blog.csdn.net/fengzhongluoleidehua/article/details/80797660

https://github.com/yonghenglh6/DepthwiseConvolution