[Radiance-general] Executing gen_dc, gen_directsunlight on multiple processors

[Jan Wienold]

Hi Mostapha,

the -n option for multiple-core usage as it is implemented into rtrace
is not working for rtrace_dc. In the (still unofficial) version of
rtrace_dc of daysim 3.1, the -n  is supported but unfortunately does not
have any impact on the calculation speed... :-( . I've tested that
already. So with the current version it doesn't make sense to use this
option and block the other cores.
Maybe a later version supports this option.

Christoph: An ambient file is not necessary for -n.

By the way, does anybody know, if there is a limit for the -n option in
rtrace?
I tested it on my new 48(!!) core machine, but couldn't use more than 9
cores, the other processes are existent  but don't use any cpu-time....


Jan




Am 01.09.2011 21:08, schrieb Mostapha Sadeghipour:
> Hi,
>
> I wonder if anybody know how I can run DAYSIM commands such as gen_dc
> and gen_directsunlight on multiple processors.
>
> My understanding is both of them are sort of rtrace command so using
> -n option shouldn't be impossible.
>
> Thanks,
> Mostapha
>
>
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