Use nvidia-smi to report card info (temps power etc)

[dpnova]

Would need @coinscrow to create an endpoint to send the info to.

[dpnova]

Herre's what the output would look like. I would parse this and send in a uniform way, so we could use the same endpoint for amd cards I think.

spn@spn-System-Product-Name:~$ nvidia-smi
Tue Aug 22 12:14:38 2017
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 375.82                 Driver Version: 375.82                    |
|-------------------------------+----------------------+----------------------+
| 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 1070    Off  | 0000:01:00.0     Off |                  N/A |
| 32%   65C    P2   151W / 151W |    673MiB /  8114MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   1  GeForce GTX 1070    Off  | 0000:03:00.0     Off |                  N/A |
| 59%   74C    P2   165W / 166W |    599MiB /  8114MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   2  GeForce GTX 1070    Off  | 0000:05:00.0     Off |                  N/A |
| 68%   81C    P2   166W / 166W |    599MiB /  8114MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   3  GeForce GTX 1070    Off  | 0000:06:00.0     Off |                  N/A |
| 73%   79C    P2   146W / 151W |    599MiB /  8114MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+
|   4  GeForce GTX 1070    Off  | 0000:07:00.0     Off |                  N/A |
| 87%   83C    P2   105W / 200W |    599MiB /  8114MiB |    100%      Default |
+-------------------------------+----------------------+----------------------+

+-----------------------------------------------------------------------------+
| Processes:                                                       GPU Memory |
|  GPU       PID  Type  Process name                               Usage      |
|=============================================================================|
|    0      1001    G   /usr/lib/xorg/Xorg                              25MiB |
|    0      9568    C   ./miner                                        595MiB |
|    0      9621    G   /usr/lib/xorg/Xorg                              48MiB |
|    1      9568    C   ./miner                                        595MiB |
|    2      9568    C   ./miner                                        595MiB |
|    3      9568    C   ./miner                                        595MiB |
|    4      9568    C   ./miner                                        595MiB |
+-----------------------------------------------------------------------------+