POV-Ray : Newsgroups : povray.windows : Processor affinity? : Re: Processor affinity? Server Time
1 Feb 2023 20:27:46 EST (-0500)
  Re: Processor affinity?  
From: dick balaska
Date: 5 Mar 2018 06:31:33
Message: <5a9d2a95$1@news.povray.org>
On 03/05/2018 04:11 AM, Stephen wrote:
> On 05/03/2018 08:55, Mike Horvath wrote:
>> On 3/5/2018 3:51 AM, Thomas de Groot wrote:
>>> On 5-3-2018 9:49, Thomas de Groot wrote:
>>> I probably should have written "threads" instead of "cores". ;-)
>>>
>>
>> Wow, +wt is even better!!
>>
>> The docs mention threads and cores. But some CPUs have 2 threads per 
>> core, correct?
>>
>>
>>
> 
> Yes my i7 CPU has 6 cores and 12 threads.
> 
> One other thought, only slightly relevant.
> 
> If, toward the end of rendering a frame, you find that you are waiting 
> for one or two blocks to finish. Setting Render_Block_Size to a smallish 
> value allows all of your cores to work on the blocks instead of being 
> idle. I generally use +BS8
> 
> http://wiki.povray.org/content/Reference:Tracing_Options#Render_Block_Size
> 

I have been grooving on Render_Pattern=3 lately.  This causes the middle 
of the pic to be rendered first, which is usually where the heavy blocks 
will live. It's also good for preview.

I was doing +wt6 for awhile. I agree leaving only 2 threads is 
sufficient to have a responsive computer.  But I preferred to run +wt8 
and then turn off 2 POV-Ray threads with Task Manager while using the 
computer, and then turning them back on when done.

But, now I run Ubuntu and I have no control over affinity and priority 
anyway. ;)

-- 
dik
Rendered 920576 of 921600 pixels (99%)


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