Re: FLUKA: space in blank common


To fluka-discuss@listbox.cern.ch
From Alberto Fasso' <Alberto.Fasso@cern.ch>
Date Fri, 22 Feb 2002 15:08:22 +0100 (CET)
In-Reply-To <200202212220.g1LMK3A28551@casino.PHYS.CWRU.Edu >
Reply-To "Alberto Fasso'" <Alberto.Fasso@cern.ch>
Sender owner-fluka-discuss@listbox.cern.ch

It is not a question of one EVENTBIN or more: in principle you can have
up to 100 of them. Your problem is that each EVENTBIN has too many bins
to fit them all in memory at the same time:

716 x  50 x 113 = 4045400
 50 x 239 x 113 = 1350350
                  -------
                  5395750

The size of the blank COMMON is presently 6000000 (which is already rather
large) and it must not accommodate only the binnings, but also the geometry, 
the
cross sections, etc. In your case, this additional stuff takes at least
1079150 (that is, 21583003 - 2 x 5395750)

Cartesian binnings take a lot of space, because you must multiply 3 
numbers: but often it is possible to reduce strongly one of the 3 dimensions
by exploiting symmetry, or by splitting a binning into smaller ones 
avoiding covering for instance vacuum regions (I see that you expect some
"zero cells" by the fact that you have a negative sign for WHAT(1)).

Otherwise, I am afraid that you have to do 3 separate runs (1 for each of the
big 716x50x113 EVENTBINs, and 1 for the two small 50x239x113 together)  

   Alberto


On Thu, 21 Feb 2002 tap4@casino.PHYS.CWRU.Edu wrote:

> Hi,
>       I am having trouble using more than one EVENTBIN.
> The .out file ends with the following when more than one EVENTBIN
> is used.
>  ******* Stopped in usrbin: insufficient space for allocation in blank 
>common *******
> 
>  *******  9808670 I*4 memory position available when 21583003 needed *******
> 
> Here are the set of EVENTBIN cards that we would like to use.
> 
> EVENTBIN   -10.0      208.0     24.0      3582.0    1194.0    -1999.0 
>wallgrid
> EVENTBIN   -3582.0   694.0     -3127.0   716.0      50.0      113.0     &
> EVENTBIN   -10.0      208.0     25.0     -3582.0    1194.0    -1999.0 
>wallgrid
> EVENTBIN   -4082.0   -1194.0   -3127.0    50.0      239.0      113.0    &
> EVENTBIN   -10.0      208.0     26.0     4082.0     1194.0    -1999.0 
>wallgrid
> EVENTBIN   3582.0    -1194.0   -3127.0   50.0       239.0      113.0    &
> EVENTBIN   -10.0      208.0     27.0     3582.0     -694.0    -1999.0 
>wallgrid
> EVENTBIN   -3582.0   -1194.0   -3127.0   716.0      50.0      113.0    &
> 
> 
> Any help would be appreciated.
> 
> Thushara Perera, Aaron Manalaysay
> 

-- 
Alberto Fassò
CERN-EP/AIP, CH-1211 Geneve 23 (Switzerland)
Phone: (41 22) 767 2398    Fax: (41 22) 767 9480   Alberto.Fasso@cern.ch


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