设置目标 GPUs 的持久模式。有关持久性模式的描述，请参见 (GPU ATTRIBUTES) 部分。需要 root。除非使用 -i 参数指定单个 GPU，否则它将影响所有 GPU。此操作的效果是立竿见影的。但是，它不会在重新启动后持续存在。每次重新启动后，持久性模式将默认为 Disabled。仅在 Linux 上可用。
persistence [pəˈsɪstəns]：n. 持续，固执，存留，坚持不懈，毅力
Persistence-M (Persistence Mode)
persistence mode 持续模式默认关闭。persistence mode 能够让 GPU 更快响应任务，待机功耗增加。关闭 persistence mode 同样能够启动任务。
sudo nvidia-smi -pm 1
Persistence-M 从 Off 变成 On，持续模式打开。
deepnorth@deepnorth-amax:~/software$ nvidia-smi
Tue Jul 9 22:24:29 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 430.14 Driver Version: 430.14 CUDA Version: 10.2 |
|-------------------------------+----------------------+----------------------+
| 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 RTX 208... Off | 00000000:1B:00.0 Off | N/A |
| 32% 48C P0 66W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce RTX 208... Off | 00000000:1C:00.0 Off | N/A |
| 34% 49C P0 60W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce RTX 208... Off | 00000000:1D:00.0 Off | N/A |
| 34% 49C P0 63W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce RTX 208... Off | 00000000:1E:00.0 Off | N/A |
| 33% 49C P0 54W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 4 GeForce RTX 208... Off | 00000000:89:00.0 Off | N/A |
| 32% 48C P0 78W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 5 GeForce RTX 208... Off | 00000000:8A:00.0 Off | N/A |
| 34% 49C P0 65W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
| 6 GeForce RTX 208... Off | 00000000:8B:00.0 Off | N/A |
| 33% 49C P0 52W / 250W | 0MiB / 11019MiB | 1% Default |
+-------------------------------+----------------------+----------------------+
| 7 GeForce RTX 208... Off | 00000000:8C:00.0 Off | N/A |
| 33% 50C P0 55W / 250W | 0MiB / 11019MiB | 0% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| No running processes found |
+-----------------------------------------------------------------------------+
deepnorth@deepnorth-amax:~/software$
