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Copy pathparallel_comm.cpp
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55 lines (47 loc) · 1.79 KB
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#if defined __MPI
#include "mpi.h"
#include "parallel_global.h"
MPI_Comm POOL_WORLD; //groups for different plane waves. In this group, only plane waves are different. K-points and bands are the same.
MPI_Comm KP_WORLD; // groups for differnt k. In this group, only k-points are different. Bands and plane waves are the same.
MPI_Comm BP_WORLD; // groups for differnt bands. In this group, only bands are different. K-points and plane waves are the same.
MPI_Comm INT_BGROUP; // internal comm groups for same bands. In this group, only bands are the same. K-points and plane waves are different.
MPI_Comm GRID_WORLD; // mohan add 2012-01-13
MPI_Comm DIAG_WORLD; // mohan add 2012-01-13
MPICommGroup::MPICommGroup(MPI_Comm parent_comm)
: parent_comm(parent_comm)
{
MPI_Comm_size(parent_comm, &this->gsize);
MPI_Comm_rank(parent_comm, &this->grank);
}
MPICommGroup::~MPICommGroup()
{
if (group_comm != MPI_COMM_NULL)
{
MPI_Comm_free(&group_comm);
}
if (inter_comm != MPI_COMM_NULL)
{
MPI_Comm_free(&inter_comm);
}
}
void MPICommGroup::divide_group_comm(const int& ngroup, const bool assert_even)
{
this->ngroups = ngroup;
Parallel_Global::divide_mpi_groups(this->gsize,
ngroup,
this->grank,
this->nprocs_in_group,
this->my_group,
this->rank_in_group,
assert_even);
MPI_Comm_split(parent_comm, my_group, rank_in_group, &group_comm);
if(this->gsize % ngroup == 0)
{
this->is_even = true;
}
if (this->is_even)
{
MPI_Comm_split(parent_comm, my_inter, rank_in_inter, &inter_comm);
}
}
#endif