POV-Ray : Newsgroups : povray.windows : Processor affinity? : Re: Processor affinity? Server Time
1 Feb 2023 21:44:13 EST (-0500)
  Re: Processor affinity?  
From: Stephen
Date: 5 Mar 2018 07:48:57
Message: <5a9d3cb9$1@news.povray.org>
On 05/03/2018 12:18, Thomas de Groot wrote:
> On 5-3-2018 10:11, 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.
> 
> I am always unsure about these things. I think my i7 CPU has one core 
> and 8 threads. As far as I know...
> 
It is generally 2 threads per core.

http://www.expertreviews.co.uk/pcs/cpus/1400962/whats-the-difference-between-core-i3-i5-and-i7-processors


>>
>> 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 
>>
>>
> 
> Ah, yes! That might be very relevant indeed. Thanks!
> 

Sorry if I did not mention it when we were working on Dhalgren? .

I leave +BS8 in the command line box. It is persistent and is there 
whenever I start Pov 3.7. Unless I delete or change it.

-- 

Regards
     Stephen


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