[Mitgcm-support] Re: SUN compiler at Scripps

[mitgcm-support at dev.mitgcm.org]

Attempt to witch from f77 to f90 on SUN fails so far:
("standard" compiler options, but O3 changed to O0:)
f90 -stackvar -explicitpar -e -u -noautopar
-xtypemap=real:64,double:64,integer:32 -fsimple=0 -dalign -O0 -xarch=v9
-c 

*  f90: Internal Error, interface, iexp:3756
   in cost_weights (fix: temporarily switched off)
*  in mdsio_writemeta need to replace I/O format 
   '(x,...)' by '(1x,...)'  (fixed)
   (compiler claims it expects integer at "x", then exits)
*  at linking:
   -xtypemap=real:64,double:64,integer:32 (command line)
   ld: fatal: Symbol referencing errors. No output written to mitgcmuv
   (replacing by "old" -r8 -i4 no more supported)


Patrick Heimbach wrote:
> 
> Correction for IBM SP3 (blue horizon):
> Gradient checks devastating AND
> NaN's for 240 timestep (10 day) run.
> Occurrence of NaN's at timestep 204 (vs 214 on Scripps SUN).
> Suggests a similar structure of the problem on these platforms.
> On IBM -O option had been removed, -g option instead.
> 
> Patrick Heimbach wrote:
> >
> > verification/natl_box_adjoint/
> > with ecco_c44_e19 and latest merged code:
> >
> > - OK under Linux
> >   (Linux twain.lcs.mit.edu 2.4.7-10 #1 Thu Sep 6 17:27:27 EDT 2001 i686)
> > - OK on MIT SUN's, e.g. fjord
> >   (SunOS fjord.mit.edu 5.8 Generic_108528-09 sun4u sparc
> > SUNW,Sun-Blade-1000)
> > - NaN's on Scripps SUN's after ~50 timesteps with current compiler
> > settings
> >   (SunOS rain.ucsd.edu 5.8 Generic_108528-13 sun4u sparc SUNW,Ultra-80)
> > - No NaN's on IBM SP3 (blue horizon), but devastating
> >   gradient checks
> > NB: code is identical, scp-ed between different platforms
> >
> > Trouble with "-g" option on Scripps SUN's:
> >
> > * Using -xtypemap=real:64,double:64,integer:32 with -g:
> > f77: Warning: illegal option -xtypemap=real:64,double:64,integer:32
> > ignored
> > f77: Warning: Optimizer level changed from 0 to 3 to support
> > parallelized code
> > f77: Warning: -parallel conflicts with -g. -parallel turned off.
> > ild: (bad file) Input file /usr/lib/libm.a contains 32-bit relocatable,
> > but producing a 64-bit file.
> >
> > * Using -r8 -i4 with -g:
> > f77: Warning: Use -xtypemap for obsolescent -r8 or -dbl; see f77 man
> > page.
> > f77: Warning: Optimizer level changed from 0 to 3 to support
> > parallelized code
> > f77: Warning: -parallel conflicts with -g. -parallel turned off.
> > ild: (bad file) Input file /usr/lib/libm.a contains 32-bit relocatable,
> > but producing a 64-bit file.
> >
> > * Switching off -stackvar -explicitpar :
> >   Note: IEEE floating-point exception flags raised:
> >     Inexact;  Underflow;  Invalid Operation;
> >   (code goes wild)

-- 
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Patrick Heimbach           Scripps Institution of Oceanography
Tel: +1/858/822-4062   Physical Oceanography Research Division
Fax: +1/858/534-9820                 Nierenberg Hall, Room 445
http://www.sio.ucsd.edu               8605 La Jolla Shores Dr.
mailto:heimbach at fjord.ucsd.edu         La Jolla, CA 92093, USA