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CESM1.1.z and CESM1.2.z - Intermittent Problem on Yellowstone with MPI_Wtime call.

A

aliceb

Member
Affected Releases - CESM1.1.z and CESM1.2.z(Bugzilla 1910) There have been intermittent failures of CESM that can be traced back to a problem calling MPI_Wtime. We do not use the MPI_Wtime function in the gptl timing library on yellowstone, however some of the CESM component models (notably pop) call MPI_Wtime directly. Adding the module load command below replaces the MPI_Wtime function with a call to system clock. If you have seen this problem on yellowstone, add the lines: 
Code: 
module use -a /glade/apps/contrib/wtime
module load wt
to your env_mach_specific file.This is a problem with the IBM MPI library and so affects all currently supported releases of CESM on Yellowstone.
 
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