[FLASH-BUGS] Re: [FLASH-USERS] memory overflow in flux_conserve_ut (by way of JBG)

[Mike Zingale]

The error appears to be that you are going over MAXBLOCKS inside the flux
conservation routines.  You've setup with 1500 blocks per processor
maximum, and you have atleast 1389 blocks on one processor.  Some padding
is needed for temporary space.

You should increase the number of processors you are running on, or
increase maxblocks (which will require more memory).

Mike

------------------------------------------------------------------------------
Michael Zingale
UCO/Lick Observatory
UCSC
Santa Cruz, CA 95064

phone:  (831) 459-5246 
fax:    (831) 459-5265
e-mail: zingale at ucolick.org
web:    http://www.ucolick.org/~zingale



On Fri, 28 Mar 2003, JB Gallagher wrote:

> > Dear all,
> >
> > I am setting up a pure hydrodynamic 3D problem in which an interstellar
> > cloud is sweept away by a supernova shock front. I am using an IBM SP4;
> > other information:
> >
> >  Number of processors:   32
> >  Build stamp: Mon Mar 24 15:47:25 2003
> >                   AIX sp011 1 0031E68A4C00
> >  Version:         FLASH 2.2.20021117
> >  Build directory: /u/inapa015/FLASH2.2/object
> >  Setup syntax:    ./setup.py bubble-3D -3d -auto -maxblocks=1500
> >
> > I get the runtime error
> >
> >  [03-28-2003  02:14.08] <<< refined: tot_blocks =   44353 >>>
> >  [03-28-2003  02:16.22] memory usage / proc (MB):  885.49 (min)   926.49
> > (max)   917.57 (avg)
> >  [03-28-2003  02:16.22] step      61  t=  2.786584E+10  dt= 4.434934E+08
> >
> > ===============================================================================
> >
> > ===============================================================================
> >  [03-28-2003  02:37.10] abort_flash():  called by PE    23;  message
> > follows:
> >  [03-28-2003  02:37.10] ERROR: memory overflow in flux_conserve_ut
> >  [03-28-2003  02:37.10] Calling MPI_Abort() for immediate
> >
> > Just before the shutdown:
> > memory usage / proc (MB):  885.49 (min)   926.49 (max)   917.57 (avg)
> >
> >   tot_blocks after  44353
> >   max_blocks 2 1389
> >   min_blocks 2 1378
> >
> > Do you have any suggestion?
> >
> > Best wishes,
> > Salvatore
> >
> > --
> >   I N A F   Istituto Nazionale di Astrofisica
> >   Osservatorio Astronomico di Palermo "G.S. Vaiana"
> >   Piazza del Parlamento 1, I-90134 Palermo, Italy
> >   Tel. +39-91-233 423, Fax. +39-91-233 444
> >   Web http://www.astropa.unipa.it/~orlando
>