What does 'Off' mean in the output of nvidia-smi?

I see “Off” to the right of “GeForce GTX 760”. Could anybody let me know what it refers to? Does it mean the GPU is not available? Thanks.

$ nvidia-smi 
Fri Apr  3 22:37:24 2015       
+------------------------------------------------------+                       
| NVIDIA-SMI 331.113    Driver Version: 331.113        |                       
|-------------------------------+----------------------+----------------------+
| 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 760     Off  | 0000:01:00.0     N/A |                  N/A |
|  0%   34C  N/A     N/A /  N/A |      7MiB /  2047MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
                                                                               
+-----------------------------------------------------------------------------+
| Compute processes:                                               GPU Memory |
|  GPU       PID  Process name                                     Usage      |
|=============================================================================|
|    0            Not Supported                                               |
+-----------------------------------------------------------------------------+

I think one needs to read the legend and data as follows:

GPU  Name        Persistence-M
0  GeForce GTX 760     Off

Fan  Temp  Perf  Pwr:Usage/Cap
0%   34C  N/A     N/A /  N/A

So “Off” is the status of the Persistence Mode.

“man nvidia-smi” will help you.
Value should be “Enabled” or “Disabled”?

Persistence Mode
       A flag that indicates whether persistence mode is enabled for the GPU.  Value is  either
       "Enabled"  or  "Disabled".   When  persistence mode is enabled the NVIDIA driver remains
       loaded even when no active clients, such as X11 or nvidia-smi,  exist.   This  minimizes
       the  driver  load latency associated with running dependent apps, such as CUDA programs.
       For all CUDA-capable products.  Linux only.

In my case, nvidia-smi says…

$ nvidia-smi
Sat Apr  4 21:22:05 2015
+------------------------------------------------------+
| NVIDIA-SMI 346.47     Driver Version: 346.47         |
|-------------------------------+----------------------+----------------------+
| 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 960     Off  | 0000:01:00.0     N/A |                  N/A |
| 30%   43C    P0    N/A /  N/A |     10MiB /  2047MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
|   1  GeForce GTX 960     Off  | 0000:04:00.0     N/A |                  N/A |
|  0%   38C    P0    N/A /  N/A |     10MiB /  2047MiB |     N/A      Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0            C+G   Not Supported                                         |
|    1            C+G   Not Supported                                         |
+-----------------------------------------------------------------------------+

I think the problem with deciphering the output is due to the layout of the data, with two lines of legend followed by two line of data. That makes it more difficult to visually connect a data item with the corresponding part of the legend, at least the first time around.

It can be turned on using this command
sudo nvidia-smi -pm 1