ParaView Nvidia IndeX: how to assign GPU for CPU

Dear Experts,
I am testing Nvidia Index with 16 cpus and only 8 GPU: default, seems it treat one GPU per CPU, and try to find GPU 8 - 15…

I want to use command line option: “–displays=0,1,2,3,4,5,6,7” to tell there are only 8 GPUs, but it seems useless…

seems, all GPUs on the node are used default, but I really need control how many GPU can be controlled in my program.

Could you please help!