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Performance considerations #127

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DavidVentura opened this issue Mar 14, 2017 · 1 comment

Contributor

DavidVentura commented Mar 14, 2017 •

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Hi
I'm trying to understand why I'm seeing some crazy cpu usage every once in a while with voctomix.
I've tried:

Disabling the streamblanker (see The StreamBlanker pipeline is always built #126)
Removing the audio sources from the videomixer (they are just an audio source with a blank video)
Removing the video sources from the audio mixer (video source with blank audio)
Disabling the mirror outputs

They seem to impact cpu usage a little when it works normally, but then it goes overboard anyway for a few seconds (reaching 95-100%)

Working OK:

Dying:

CPU:

EDIT:

Some notes:

This is running 2 video streams + background, 1 audio stream on a 6 core 3.5ghz machine (1280x720 @ 25fps)
Suddenly cpu usage hits 100% for a few seconds, voctomix drops frames but blessedly it keeps the audio in sync.
the rescheduling interrupts go up from ~3k to ~7k and the cpu usage goes up accordingly

DavidVentura mentioned this issue

allow audio and video only streams #128

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Contributor Author

DavidVentura commented Mar 16, 2017

This is resolved by #128 and #129 (not sure why, but it works)

DavidVentura closed this as completed

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