Why does CUDA MPS always occupy the same size of memory?

I turned on MPS on Tesla T4 and found that MPS turned on and not turned on, the GPU Memory Usage on NVIDIA-SMI is the same.
Q1:Does MPS work?
Q2:Why the GPU Memory Usage occupied by CUDA programs is the same?
Q3:Why MPS Server always occupies 25Mib?I tested other applications with MPS turned on, it also takes 25Mib in NVIDIA-SMI, but I forgot to save the result.


mps server always take 25MB. I guess you want to save some GPU memory by using MPS, but context itself may just consume a small part of the memory?