[Ncep.list.fv3-announce] fv3gfs release beta test

[Samuel Trahan - NOAA Affiliate]

Jim,

If you can do that, you will be my hero.  Jet takes twice as long to
compile, and most of that time is the GFS_diagnostics.

Sincerely,
Sam Trahan

On Fri, May 12, 2017 at 3:07 PM, James Abeles - NOAA Affiliate <
james.a.abeles at noaa.gov> wrote:

> Moorthi,
> I ran the tests with a simple C96 grid for 48 hours and the one that
> compile GFS_diagnostics with -O0 is actually faster:
> wrk.C96/out.96:0:    FV_DIAG                     29.1041       0.0000
>  29.1041       0
> wrk.C96.diag_O0/out.96:0:    FV_DIAG                     14.2025
> 0.0000      14.2025       0
>
> Now I need to figure out if we can compile some routines with different
> flags.
>
> On Fri, May 12, 2017 at 3:03 PM, Shrinivas Moorthi <
> shrinivas.moorthi at noaa.gov> wrote:
>
>> Thanks Jim.
>> Moorthi
>> On 05/12/2017 02:55 PM, James Abeles - NOAA Affiliate wrote:
>>
>> Resending with correct -O0 flag.
>>
>> Moorthi,
>> The slow compile is GFS_diagnostics.F90. I have tried many things to
>> reduce the compile time but the only one that worked was compiling at -O0.
>> There is really nothing being done in this routine other than storing
>> diagnostices so I am testing the performance with -O0 vs -O2.
>>
>> *-O2*
>> /gpfs/hps/emc/global/noscrub/James.A.Abeles/fv3gfs.v0beta/FV3/gfsphysics>
>> time ftn -DNEW_TAUCTMAX -DSMALL_PE -DNEMS_GSM -fpp -Wp,-w
>> -I/opt/cray/netcdf/4.3.2/INTEL/140/include -I/opt/cray/netcdf/4.3.2/INTEL/140/include
>> -fno-alias -auto -safe-cray-ptr -ftz -assume byterecl -nowarn -sox -align
>> array64byte -i4 -real-size 32  -O2 -debug minimal -fp-model source
>> -qoverride-limits -I../fms -I../fms/include  -c
>> GFS_layer/GFS_diagnostics.F90 -o GFS_layer/GFS_diagnostics.o
>>
>> real    10m3.761s
>> user    10m1.842s
>> sys     0m0.396s
>>
>> *-O0*
>> /gpfs/hps/emc/global/noscrub/James.A.Abeles/fv3gfs.v0beta/FV3/gfsphysics>
>> time ftn -DNEW_TAUCTMAX -DSMALL_PE -DNEMS_GSM -fpp -Wp,-w
>> -I/opt/cray/netcdf/4.3.2/INTEL/140/include -I/opt/cray/netcdf/4.3.2/INTEL/140/include
>> -fno-alias -auto -safe-cray-ptr -ftz -assume byterecl -nowarn -sox -align
>> array64byte -i4 -real-size 32  -O0 -debug minimal -fp-model source
>> -qoverride-limits -I../fms -I../fms/include  -c
>> GFS_layer/GFS_diagnostics.F90 -o GFS_layer/GFS_diagnostics.o
>> real    0m0.981s
>> user    0m0.728s
>> sys     0m0.072s
>>
>>
>>
>>
>>
>> --
>> Dr. Shrinivas Moorthi
>> Research Meteorologist
>> Modeling and Data Assimilation Branch
>> Environmental Modeling Center / National Centers for Environmental Prediction
>> 5830 University Research Court - (W/NP23), College Park MD 20740 USA
>> Tel:(301)683-3718 <(301)%20683-3718>
>>
>>
>
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