POV-Ray : Newsgroups : povray.general : Does POV not use Intel's "performance" cores? : Re: Does POV not use Intel's "performance" cores? Server Time
1 Dec 2022 18:46:31 EST (-0500)
  Re: Does POV not use Intel's "performance" cores?  
From: Alain Martel
Date: 28 Jul 2022 12:10:13
Message: <62e2b4e5$1@news.povray.org>
Le 2022-07-28 à 04:35, Scott a écrit :
> Thorsten <tho### [at] trfde> wrote:
>> Hello,
>>
>> it is the operating system, not the application that decides which cores
>> get used by which thread. You may want to check the energy efficiency
>> settings of your operating system as they might assign all threads to
>> just 8 of the cores for some reason.
> 
> OK I found the issue.
> 
> Render Priority in POV menu of "Normal" (the default) sets the render priority
> as "Below Normal" in task manager, which limits it to only using Efficiency
> cores.
> 
> If I set Render Priority to "High" in POV, this corresponds to "Above Normal" in
> task manager, which makes the whole system quite unresponsive, but does use all
> cores.
> 
> The solution is to keep priority as "Normal" in POV, then immediately after
> starting the render, go into Task Manager and change the priority of the POV
> process to Normal. This then makes it use all logical cores.
> 
> A bit inconvenient, I wonder why "Normal" in POV is converted to "Below Normal"
> in task manager?
> 
> 
> 
Use the high priority with +wt22. That'll leave two cores for other 
tasks. Or, use +wt23, leaving 1 core for the OS and other processes. You 
may want to add that switch directly in quickres.ini


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