我注意到,當我配置Theano使用GPU,並運行一些腳本,該CPU是使用〜100%:Theano在配置爲使用GPU時是否實際使用了100%的CPU?
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
5927 jjjjjj 20 0 0.259t 0.025t 83228 R 100.2 20.2 33025:42 python
8259 jjjjjj 20 0 0.239t 5.303g 102876 R 100.2 4.2 8209:45 python
7791 jjjjjj 20 0 0.239t 5.086g 102872 R 99.8 4.0 8209:36 python
7761 jjjjjj 20 0 0.239t 5.193g 104604 R 99.5 4.1 7267:47 python
這是否意味着CPU是瓶頸?也就是說,我應該推斷,如果我用更高頻率的CPU替換CPU,腳本運行速度會更快嗎?或者可能是瓶頸在其他地方,並且CPU正在等待?如果兩者都有可能,我怎麼知道哪一個是瓶頸?
這裏是nvidia-smi
輸出:
Tue Sep 27 13:55:13 2016
+------------------------------------------------------+
| NVIDIA-SMI 352.63 Driver Version: 352.63 |
|-------------------------------+----------------------+----------------------+
| 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 | 0000:02:00.0 Off | N/A |
| 32% 73C P2 95W/250W | 207MiB/12287MiB | 45% Default |
+-------------------------------+----------------------+----------------------+
| 1 GeForce GTX TIT... Off | 0000:03:00.0 Off | N/A |
| 32% 72C P2 94W/250W | 182MiB/12287MiB | 40% Default |
+-------------------------------+----------------------+----------------------+
| 2 GeForce GTX TIT... Off | 0000:82:00.0 Off | N/A |
| 33% 73C P2 93W/250W | 207MiB/12287MiB | 43% Default |
+-------------------------------+----------------------+----------------------+
| 3 GeForce GTX TIT... Off | 0000:83:00.0 Off | N/A |
| 42% 81C P2 148W/250W | 11872MiB/12287MiB | 79% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
| 0 8259 C python 157MiB |
| 1 7791 C python 157MiB |
| 2 7761 C python 157MiB |
| 3 5927 C python 11847MiB |
+-----------------------------------------------------------------------------+