Forums - CPU usage of qmmf-server goes to 125%

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CPU usage of qmmf-server goes to 125%
Join Date: 19 Feb 21
Posts: 7
Posted: Tue, 2021-07-20 01:57


We execute this command, which does not write to disk.

gst-launch-1.0 -e qtiqmmfsrc name=qmmf qmmf.video_0 ! video/x-h264,format=NV12,width=1920,height=1080,framerate=30/1 ! fakesink

Looking at it with htop, we see that the CPU usage of qmmf-server goes to 136%. Is that expected? Given that we are only using one camera, we expect this value to be much lower. Any idea how to decrease the CPU load? The gst-launch-1.0 thread is only at around 3%.

See for screenshot. (top shows 16% usage, because it is showing the percentage of cpu usage per process for all the 8 cpus, while htop shows the per cpu percentage, 128.0/8=16.0).

What could be taking up so much of the CPU? And how can we make it more performant?

Best regards,


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