Is cutorch.synchronize() necessary?

Question

Is cutorch.synchronize() necessary?

ffmpbgrnn opened this issue 9 years ago · comments

Hi, I found cutorch.synchronize() was used in main.lua#L184. Isn't backward() blocking? And in my experiment, cutorch.synchronize() will cost much time.

Wojciech Zaremba · Answer 1 · Mon Sep 07 2015 21:15:00 GMT+0800 (China Standard Time)

It was necessary a year ago when I was writing it. Without it code was crashing.

I am not sure if it is necessary now. Torch used to be not the most stable environment.

Linchao Zhu · Answer 2 · Tue Sep 08 2015 13:51:03 GMT+0800 (China Standard Time)

Thank you! @soumith, do you have idea about this?