A couple of observations about MPI-ROMS

Suggest improvements/optimizations to the ROMS code.

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dschaffer

A couple of observations about MPI-ROMS

#1 Post by dschaffer » Thu Aug 07, 2003 1:05 pm

I noticed that MPI-ROMS is slower that SSM-ROMS. You can combine your MPI_WAIT calls for each of the 4 neighboring directions into a single MPI_WAITALL. This should improve performance a bit.

Also, for your timers: I would suggest taking a global max of the timers rather than a global sum. The max is easier to understand as you change processor counts and is maybe a slightly better measure than the average (which one could compute by dividing your sum by Nprocs).

Dan Schaffer

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