[MITgcm-support] ifort/g77 issue

[Martin.Losch at awi.de]

Tom,

I have the impression, that the output files that you send are absolutely identical. Also, can you reproduce them with monitorFreq=1.,

Martin

Martin Losch
Alfred Wegener Institute 
Postfach 120161, 27515 Bremerhaven, Germany; 
Tel./Fax: ++49(0471)4831-1872/1797



----- Original Message -----
From: Thomas Haine <Thomas.Haine at jhu.edu>
Date: Tuesday, January 22, 2008 5:13 pm
Subject: Re: [MITgcm-support] ifort/g77 issue

> Hi Martin, OLx/y=3 works fine in g77, but the ifort code dies very
> quickly. See attached output files (no mpi, Olx,y=3). The same also
> happens with no forcing. 
> 
> The output shows some diffs in Ro_surf, but they look small. Perhaps
> something is different in the grid/mask setup, however.
> 
> Any ideas about what I should try next?
> 
> Thanks, Tom.
> 
> 
> On Mon, 2008-01-21 at 09:13 +0100, Martin Losch wrote:
> > Hi Tom,
> > is it possible, that your configuration/parameters require Olx/y 
> = 4,  
> > but we don't test for it (e.g. with advection scheme 7, that's 
> the  
> > case as far as I know)?
> > Maybe there is some initialization issue, that is handled 
> differently  
> > by ifort and g77.
> > 
> > Martin
> > On 18 Jan 2008, at 19:00, Thomas Haine wrote:
> > 
> > > Hi Folks,
> > >
> > > I have an ifort/g77 issue on dolphin (x86_64, linux  
> > > 2.6.9-55.0.6.ELsmp)
> > > using checkpoint59m (and an old checkpoint too):
> > >
> > > Building with linux_amd64_ifort I get theta blowing up in 3-10  
> > > steps (in
> > > 1 step it rises to O(10^3)). The exact details are not 
> reproducible.> >
> > > Building with linux_amd64_g77 gives no problem.
> > >
> > > I get similar problems with ifort+mpi, where increasing OLx,OLY 
> from> > 3->4 seems to stabilise the problem (not fully explored).
> > >
> > > I have: gcc version 3.4.6 20060404 (Red Hat 3.4.6-8), ifort 
> Version> > 10.0. My pkg/data configuration is very simple.
> > >
> > > Any ideas?
> > >
> > > Cheers, Tom.
> > > -- 
> > > --------------------------------------------
> > >  Thomas W. N. Haine, Professor,
> > >  Department of Earth & Planetary Sciences,
> > >  329 Olin Hall, The Johns Hopkins University,
> > >  Baltimore, MD 21218, USA.
> > >  Tel : 410 516 7048,   Fax : 410 516 7933
> > >  Thomas.Haine at jhu.edu
> > >  http://www.jhu.edu/~eps/faculty/haine
> > > --------------------------------------------
> > > _______________________________________________
> > > MITgcm-support mailing list
> > > MITgcm-support at mitgcm.org
> > > http://mitgcm.org/mailman/listinfo/mitgcm-support
> > 
> > 
> -- 
> --------------------------------------------
> Thomas W. N. Haine, Professor,
> Department of Earth & Planetary Sciences,
> 329 Olin Hall, The Johns Hopkins University,
> Baltimore, MD 21218, USA.
> Tel : 410 516 7048,   Fax : 410 516 7933
> Thomas.Haine at jhu.edu
> http://www.jhu.edu/~eps/faculty/haine
> --------------------------------------------
> 
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