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

James Abeles - NOAA Affiliate james.a.abeles at noaa.gov
Fri May 12 19:07:50 UTC 2017


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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