cuda device using

[curlneuron]

The model seems just using 1 cuda device.

I'm using my own machine with 4 card , and set the cmd.sh as:
export train_cmd="run.pl --mem 8G"
export cuda_cmd="run.pl --mem 8G --gpu 4"
export decode_cmd="run.pl --mem 8G"

But now it's just using card 0. what should I do?