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

[Shrinivas Moorthi]

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

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