[Mitgcm-support] Re: puzzle of the day.....Profiling

[mitgcm-support at dev.mitgcm.org]

Whenever I try to use any code analysis tool on the sun the system gives
up. So I am not surprized, that it happens again, when I try to do a
profile: neither the -p nor the -pg option lead to code that runs
properly (I now have 4 zombies on my system :-). So no simple profile,
unfortunately ...

Martin

Alistair Adcroft wrote:
> 
> Can Martin to a profile for us?
> 
> A.
> 
> > martin is running the global90x40 test.
> >
> > the thermodynamics block takes 20 secs for 30 time steps.
> >
> > for exp2
> >
> > the thermodynamics block takes 4 secs for 30 time steps.
> >
> > the vertical grid is reduced from 20 levels to 15 levels
> > in global90x40.
> >
> > dynamics runs in 8 secs for exp2 and 6 secs for global90x40
> > i.e. it scales roughly according to reduction in levels.
> >
> > global90x40 uses GM, exp2 does not..., but turning
> > GM off ( useGMRedi=.FALSE. ) only reduces global90x40:thermodynamics
> > time to 17 secs ( not 4! ).
> >
> > the setups are otherwise very similar i believe
> >
> > was ist los?
> >
> > chris

-- 
Martin Losch // mailto:mlosch at mit.edu
Department of Earth, Atmosphere, and Planetary Sciences
MIT, Bldg. 54-1523, 77 Massachusetts Ave., Cambridge, MA 02139
phone/fax: ++1 (617) 253-5938/4464