Message: Re: Large memory for small world ? Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

More Re: Large memory for small world ? 

Keywords: memory, voxels
Forum: Geometry
Re: Question Large memory for small world ? (Vagner Ferreira Cassola)
Date: 10 Dec, 2005
From: Gabriele Cosmo <Gabriele Cosmo>

Hi Vagner Ferreira,

> I have a problem of memory when try to make my world smaller, the use
> memory make biggest than whem a try with a original size. For example
> if will I used with World the BOX this geometry will used more memory
> that others geometries? I had simulated the head voxel model with 4,5
> x 10^5 voxels into world with box geometry however my simulation was
> crashed and when I used world with sphere geometry the simulation ran
> without problem. The box world had same size that head voxel model.

as also specified in the documentation, the world volume must be the
biggest of all volumes containing everything -with reasonable margin-
in the 3D space. This is mainly to allow for the optimisation algorithms
to correctly initialise and also for the navigation to perfom more
efficiently. Given this can be a rather common mistake, we may enforce
this rule at construction in future...
So please, if you wish to use a box as the world volume, try increasing
its size; you may also try using the manual tuning of the optimisation
quality ('smartless') for the logical volume representing the structure
harder to optimise.

Cheers, Gabriele

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

 Add Message Add Message
to: "Re: Large memory for small world ?"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews


[ Geant 4 Home | Geant 4 HyperNews | Search | Request New Forum | Feedback ]