[Radiance-general] rtrace and parallel processes

[Jack de Valpine]

Hi Rob,

Shows how good my memory is. That is a great test that you did along 
with the final eye opening clarification from Andy.

-Jack

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#
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Guglielmetti, Robert wrote:
> Jack was right to ask for more info, and your commands will be helpful, but
> in the meantime this may be useful (in particular, skip to the bottom of the
> post where Andy McNeill contributes the useful part):
>
> http://www.rumblestrip.org/interests/light/rtrace-multiprocessing-option-ini
> tial-test-results/
>
> - Rob
>
> On 6/24/10 2:33 PM, "Cramer Silkworth" <silkworth at transsolar.com> wrote:
>
>   
>> Hi All,
>>
>> I've been testing the -n option of rtrace, but I'm not getting speed increases
>> that make sense. My test job takes rtrace ~30 minutes on one core. With four
>> cores I only get down to 24 minutes (and ~25 minutes for 2 and 3 cores). I can
>> see in system monitor that it is using the right number of cores. I'm not
>> expecting exactly 1/4th the run time, but only 20% faster doesn't sound quite
>> right. Any thoughts?
>>
>> Thanks,
>> Cramer
>>     
>
>
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