Not working with nvidia-smi

[ShanmuHuang]

My process runs on nvidia GPU.
[centos@wenyangmao01 ~]$ kill -31 87315
[centos@wenyangmao01 ~]$ ps aux|grep 87315
centos 87354 0.0 0.0 112724 988 pts/1 S+ 02:44 0:00 grep --color=auto 87315
[centos@wenyangmao01 ~]$ nvidia-smi
Wed Jun 26 02:44:30 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 410.48 Driver Version: 410.48 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Tesla V100-DGXS... Off | 00000000:82:00.0 Off | 0 |
| N/A 38C P0 49W / 300W | 449MiB / 32478MiB | 0% Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 87315 C ./CUDA-Z-0.10.251-64bit.run 439MiB |
+-----------------------------------------------------------------------------+