[MITgcm-support] OLy in a 2D case (verification/internal_wave)
nicolas.grisouard at grenoble-inp.fr
Wed Dec 17 12:24:49 EST 2008
I ran the verification test "internal_wave" with OLy=2 instead of OLy=3
in SIZE.h. As sNy=1 in this case, this makes quite a difference.
By doing this, I saved 23% of CPU time and the output files seem to be
identical (I substracted the two final U fields and the maximum absolute
value of the resulting field is rigourously equal to zero). It didn't
work with OLy=1 (output files are different).
So as this test might be the one some people interested in 2D will start
with (this was my case about 2 years ago), and unless the-ones-who-know
have an objection, it might be a good idea to set OLy=2 in this case. I
just saw that in the new version, OLy=4, so if what I said still holds,
people working on this kind of configuration would see their computing
times roughly divided by 2.
Thank you for checking if its true,
PhD Student - ERES research group
Laboratoire des Ecoulements Geophysiques et Industriels
38041 Grenoble cedex 9 France
tel : +33 (0)476 825 037 - fax : +33 (0)476 827 022
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