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fixes problem with MPI_Comm_Split in openmpi when hash is negative #25

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Merged
mark-a-potts merged 2 commits into from
Feb 6, 2020
Merged

fixes problem with MPI_Comm_Split in openmpi when hash is negative #25

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5434d8e
fixes problem with MPI_Comm_Split in openmpi when hash is negative
mark-a-potts Feb 6, 2020
e84f1b9
removed redundant check on hash > 0
mark-a-potts Feb 6, 2020
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4 changes: 2 additions & 2 deletions src/module_NEMS_Rusage.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -678,15 +678,15 @@ subroutine color_by_hash(name,namelen,commin,comm_name,comm_hosts,rank_world,ier
c_name1(1) = ctry(itry:itry)
c_length=namelen+1
c_error=-999
c_crc32c=nems_c_crc32(c_name1,c_length,c_error)
c_crc32c=abs(nems_c_crc32(c_name1,c_length,c_error))
if(c_error/=0) then
! Should never get here. This indicates the name is
! empty or beyond 2**31-3 bytes.
ierr=1
return
endif
hash=c_crc32c

call MPI_Comm_Split(commin,hash,rank_world,comm_name,error)
if(error/=0) then
ierr=2
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