Ubuntu – How to measure GPU usage

gpusoftware-recommendation

Using the top command in the terminal lists processes, sorted by their CPU usage (and you can change it to sort by another parameter)

Is there an equivalent for the GPU?

For Nvidia GPUs there is a tool nvidia-smi that can show memory usage, GPU utilization and temperature of GPU.
For Intel GPU's you can use the intel-gpu-tools.
AMD has two options
1. fglrx (closed source drivers):
```
aticonfig --odgc --odgt
```
2. And for mesa (open source drivers), you can use RadeonTop .

Why doesn't htop display the same processes than top?

Because htop hides kernel threads by default, while top doesn't. You can switch this option off in F2-settings in htop.

Before:
Uncheck the Hide kernel threads setting, press Esc to leave screen instead of F10.
Notice the new number of kthr (kthreads) at the cursor, and all the new k... processes that have shown up. You can sort these by CPU, etc. as usual. Apart from the name (begins with a k, has a / towards the end), you can also identify kernel threads by their very low PIDs (notice the 1, 2, 3...17 in the screenshot?)