when dfsmn support muti GPU

[qiyuqing]

now DFSMN is use single GPU ,when ali privode muti gpu version
I use BMUF method for muti GPU ,but wer is not better than single GPU.

[RechardWong]

now DFSMN is use single GPU ,when ali privode muti gpu version
I use BMUF method for muti GPU ,but wer is not better than single GPU.

Hi, I can't figure out what's mean of ‘BMUF’。I am very grateful if you can tell me how to implement Muti-GPU training in single machine。