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当“未找到正在运行的进程”时，为什么我的 CUDA GPU-Util 约为 70%？

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当“未找到正在运行的进程”时，为什么我的 CUDA GPU-Util 约为 70%？

在配置了 2 个 Tesla K80 卡的系统后，我注意到运行时nvidia-smi4 个 GPU 中的一个处于高负载状态，尽管显示“未找到正在运行的进程”。为什么会发生这种情况？我该如何纠正？

以下是 的输出nvidia-smi：

➜  compute-0-1: ~/> nvidia-smi
Mon Sep 26 14:48:00 2016       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 361.77                 Driver Version: 361.77                    |
|-------------------------------+----------------------+----------------------+
| 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 K80           Off  | 0000:05:00.0     Off |                    0 |
| N/A   34C    P0    57W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   1  Tesla K80           Off  | 0000:06:00.0     Off |                    0 |
| N/A   26C    P0    76W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   2  Tesla K80           Off  | 0000:85:00.0     Off |                    0 |
| N/A   33C    P0    60W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   3  Tesla K80           Off  | 0000:86:00.0     Off |                    0 |
| N/A   24C    P0    74W / 149W |      0MiB / 11441MiB |     71%      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|  No running processes found                                                 |
+-----------------------------------------------------------------------------+

答案1

这个 nvidia 论坛解决了此问题。要解决此问题，请启用持久模式：

sudo nvidia-smi -pm 1

运行此命令后，结果如下nvidia-smi：

➜  compute-0-1: ~/> nvidia-smi            Mon Sep 26 14:55:21 2016    
Mon Sep 26 14:55:21 2016       
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 361.77                 Driver Version: 361.77                    |
|-------------------------------+----------------------+----------------------+
| 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 K80           On   | 0000:05:00.0     Off |                    0 |
| N/A   36C    P8    27W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   1  Tesla K80           On   | 0000:06:00.0     Off |                    0 |
| N/A   28C    P8    30W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   2  Tesla K80           On   | 0000:85:00.0     Off |                    0 |
| N/A   37C    P8    28W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+
|   3  Tesla K80           On   | 0000:86:00.0     Off |                    0 |
| N/A   27C    P8    72W / 149W |      0MiB / 11441MiB |      0%      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|  No running processes found                                                 |
+-----------------------------------------------------------------------------+

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