[Radiance-general] rtrace and parallel processes

[Guglielmetti, Robert]

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