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[Closed] 'Use less CPU when in background' isn't working

Hello all,

I'm running UE v4.8 (preview) on Debian 8 and I have noticed that the editor doesn't use less CPU when in background, instead it consumes ~40% of CPU all the time.

It seems like the editor doesn't get notified that it's not in the focus anymore and continues to draw the UI elements. Unfortunately I was not able to prove it, because all the OpenGL debuggers (gDEBugger, vogl, GLSL-Debugger) were not building or running for some reason.

This is what I have:

 $uname -a
 Linux wrslnx196 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt9-3~deb8u1 (2015-04-24) x86_64 GNU/Linux
 

"Use less CPU when in Background" is enabled.

Please tell me if additional info is required.

Product Version: UE 4.8 Preview
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asked Jun 01 '15 at 12:29 PM in Linux

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duburlan
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The question has been closed Jun 02 '15 at 03:58 PM by amigo for the following reason:

The question is answered, right answer was accepted


1 answer: sort voted first

"Use less CPU when in Background" does nothing because FLinuxPlatformProcess::IsThisApplicationForeground() is stubbed at the moment.

Good news is that I have implemented the needed functionality and will be submitting a PR shortly. Not sure if this change will make it into epic/4.8, but will be in epic/master once accepted.

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answered Jun 02 '15 at 01:49 PM

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amigo
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avatar image duburlan Jun 02 '15 at 02:03 PM

Hi amigo,

could you share the patch, please?

avatar image amigo Jun 02 '15 at 02:40 PM
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