Hi, Balaji ([EMAIL PROTECTED]) has tested mom4 in mpi (common usage at GFDL) and SHMEM. The answers agree to the bit for a test case with full physics. Here are some comments of note.
The overall difference in the efficiency is small as mom4 with full physics load is not limited by communication, but by computation. The advantage of SHMEM is to reduce the latency which will become apparent as the 2D communication (free surface) takes a larger fraction of the total time. SHMEM will also show a greater advantage at larger PE counts. To run mom4 in SHMEM, just turn on -Duse_libSMA instead of -Duse_libMPI. Also add the -lsma to LDFLAGS. No other change is required. Steve Griffies
begin:vcard n:Griffies;Stephen x-mozilla-html:FALSE org:DOC/NOAA/OAR/GFDL adr:;;;;;; version:2.1 email;internet:[EMAIL PROTECTED] title:Physical Scientist x-mozilla-cpt:;-11168 fn:Stephen Griffies end:vcard
