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

[Jun Wang - NOAA Affiliate]

Jim,

GFS_diagnostics.F90 is a simple initialization routine, it is hardcoded to
set up physics diagnostic field information. The file is more than 3000
lines, but I am still puzzled why it takes so long to compile, maybe
instead we can save the field information in a file and just let the code
read in those information.

Jun

On Fri, May 12, 2017 at 3:16 PM, Shian-Jiann Lin - NOAA Federal <
shian-jiann.lin at noaa.gov> wrote:

> Sam:
>
> I thought the timing only showed "FV_DIAG", not GFS_diagnostics. The
> FV_diag involves a lot of things that does not palatalized well.
>
>
> Shian-Jiann Lin
> NOAA/Geophysical Fluid Dynamics Laboratory
>
> On Fri, May 12, 2017 at 3:11 PM, Samuel Trahan - NOAA Affiliate <
> samuel.trahan at noaa.gov> wrote:
>
>> 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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>>
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