On 1/19/2016 3:16 PM, Theogott wrote:
> As POV-Ray uses most often all CPU Cores, it makes only limited sense to run
> multiple instances.
> There are however some cases.
> For example if you have one picture that renders for long time - maybe several
> days. And you want to "experiment" with another POV-Ray.
>
> I do this often, sometimes i have 4 or 5 POV-Rays running so here are some
> tipps:
>
> 1. The first thing to do is, check that in teh "Render Menu" the Render-Priority
> is default on "Background".
>
> 2. Leave it on Background for the POV-Ray that is rendering for long time
> anyway.
>     You can set it to "Normal" if you have one POV-Ray that is rendering an qucik
> Testpicture. Then this will more soon be ready.
>
> 3. The Task Manager is your friend. Sometimes it makes sense, to "free"
> CPU-Cores from your system. You can do this by choosing POV-Ray "pvengine64.exe"
> in the Task-Manager and the choose "Set CPU Affinity".
> There you can tell which CPU-Cores are used by which instances.
>
> This way you can reserve one core for you and windows, by just removing its
> "Affinity" (remove the cross from the checkmark).
>
> Also if you have 2 POV-Instances render long time together, you can give each of
> them a specified amount of CPU Cores. Best is AB-AB-AB-AB means
> Core 0 - POV - A,
> Core 1 - POV - B,
> etc. This way, the hyperthreading "Core" has a different program and can use the
> internal execution units better.
>
> And you avoid too many context switches like you get them if you give any
> POV-Ray all the cores at the same Render Priority.
>
>
>

Thanks! Those are good tips!


Mike

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