Bumblebee and NVIDIA

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Bumblebee and NVIDIA

Postby GonzaloP » 2020-11-15 11:59

Hi,

I just upgraded to debian bullseye and I had to set up again my Geforce MX150.
I followed the instructions in https://wiki.debian.org/Bumblebee yet I am finding some weird behavior:

1) If I run 'optirun glxgears -info' I get 70 frames/sec and glxgears appears in nvidia-smi (meaning, it is running via GPU) yet my CPU is running glxgears at 110%.

2) When I run 'primusrun glxgears -info' it runs at 60 frames/sec and glxgears appears in nvidia-smi and the CPU usage is 90%

3) If I run 'glxgears' runs at 60 frames/sec, it doesn't show up in nvidia-smi and the CPU usage is 7%.

So I am confused, in the test 1 and 2 the CPU usage should be a way lower since it says (at least nvidia-smi) that it is running on the GPU, and in test 3 the CPU usage should be higher since it is running on CPU. Plus, the frame rate seems to be the same in the 3 different tests.

Is my GPU actually running the processes? Any suggestion?

Thank you very much
GonzaloP
 
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Re: Bumblebee and NVIDIA

Postby stevepusser » 2020-11-15 19:09

glxgears is not a true benchmark.

Also, it also needs special flags with the Nvidia driver, which you should be able to find quickly with any quick web search.

The 60 fps with the Intel driver is the screen refresh rate, and does not reflect reality.
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