Know what is the use of a root_solver_ in caffe twn

[agarwal-ayushi]

Hi @fengfu-chris

I am looking at the code of solver.cpp and I see a new variable root_solver_. can you help me understand it function of this variable?

Also I wanted to ask you, How have you utilized the GPU to train your binary and ternary weight models? GPU as of now doesn't supports binary operands. Have you stored your binary weights in float and then trained on GPU? Does this need modification to the GPU Kernel?

Thanks,
Ayushi