本文介绍了如何使用nvidia-smi工具查看GPU的详细状态，包括温度、风扇转速、功耗、内存使用情况等，并展示了当前运行在GPU上的进程及其占用的显存情况。
nvidia-smi 可以查看gpu 的使用情况。需要注意的是：nvidia与-smi 之间没有空格
Sun Nov 22 16:40:02 2015
+------------------------------------------------------+
| NVIDIA-SMI 346.72 Driver Version: 346.72 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 GeForce GTX TIT... Off | 0000:05:00.0 Off | N/A |
| 27% 66C P2 75W / 250W | 4972MiB / 12287MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX TIT... Off | 0000:42:00.0 Off | N/A |
| 29% 69C P2 76W / 250W | 1206MiB / 12287MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 5451 C /usr/local/MATLAB/R2014b/bin/glnxa64/MATLAB 2471MiB |
| 0 20721 C /usr/local/MATLAB/R2014b/bin/glnxa64/MATLAB 2471MiB |
| 1 29980 C /usr/local/MATLAB/R2014b/bin/glnxa64/MATLAB 1179MiB |
+-----------------------------------------------------------------------------+
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