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when using SHM_NONE allow multiple ranks per node but without using shared memory

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This commit is contained in:
Christoph Lehner 2020-08-06 14:42:38 +02:00
parent 27b4fbf3f0
commit 3abe09025a
1 changed files with 9 additions and 0 deletions
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9
Grid/communicator/SharedMemoryMPI.cc
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@ -47,7 +47,12 @@ void GlobalSharedMemory::Init(Grid_MPI_Comm comm)
/////////////////////////////////////////////////////////////////////
// Split into groups that can share memory
/////////////////////////////////////////////////////////////////////
#ifndef GRID_MPI3_SHM_NONE
MPI_Comm_split_type(comm, MPI_COMM_TYPE_SHARED, 0, MPI_INFO_NULL,&WorldShmComm);
#else
MPI_Comm_split(comm, WorldRank, 0, &WorldShmComm);
#endif
MPI_Comm_rank(WorldShmComm ,&WorldShmRank);
MPI_Comm_size(WorldShmComm ,&WorldShmSize);
@ -705,7 +710,11 @@ void SharedMemory::SetCommunicator(Grid_MPI_Comm comm)
/////////////////////////////////////////////////////////////////////
// Split into groups that can share memory
/////////////////////////////////////////////////////////////////////
#ifndef GRID_MPI3_SHM_NONE
MPI_Comm_split_type(comm, MPI_COMM_TYPE_SHARED, 0, MPI_INFO_NULL,&ShmComm);
#else
MPI_Comm_split(comm, rank, 0, &ShmComm);
#endif
MPI_Comm_rank(ShmComm ,&ShmRank);
MPI_Comm_size(ShmComm ,&ShmSize);
ShmCommBufs.resize(ShmSize);