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Comment by joebonrichie

1 day ago

Are you using nvidia-vaapi-driver? If so, you'll need to set `CUDA_DISABLE_PERF_BOOST` in your environment.

3 comments

joebonrichie

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Havoc  21 hours ago

Oh that’s interesting. I shall investigate thanks.

edit: very quick test with MPV seems to confirm this works - eliminates the gnarly additional GPU draw. Measuring draw at wall now puts CPU and GPU route on equal footing...both basically the machines idle draw. Tested both 264 and 265...same outcome. 3090.

Thanks!

  • jorvi  1 hour ago

    If you really want to power optimize, there's a special dmabuf-wayland backend that hands off compositing to Wayland. You lose some post-processing but your power use can drop from 12-15w to 2-5w. This is also how the newer Linux video players attain really low power draws.

  • Havoc  20 hours ago

    Bonus discovery I just learned. Under nvtop -> F2 -> Processes -> Fields -> there you can make it show encode/decode. It's disabled by default