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#include <mpi.h>
#include <iostream>
#include <functional>
#include <algorithm>
#include <vector>
#include <sstream>
#include "CombBLAS/CombBLAS.h"
int main(int argc, char *argv[])
{
int nprocs, myrank;
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &nprocs);
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
if (argc < 3) {
if (!myrank)
std::cerr << "Usage: ./Subgraphs2ProcsTest <MatrixA> <VectorAssignments>" << std::endl;
MPI_Finalize();
return -1;
}
{
if (!myrank) std::cerr << "processor grid: (" << std::sqrt(nprocs) << " x " << std::sqrt(nprocs) << ")" << std::endl;
std::shared_ptr<combblas::CommGrid> fullWorld;
fullWorld.reset(new combblas::CommGrid(MPI_COMM_WORLD, 0, 0));
combblas::SpParMat<int, double, combblas::SpCCols<int, double> > A(fullWorld);
combblas::FullyDistVec<int, int> assignments(A.getcommgrid());
A.ParallelReadMM(std::string(argv[1]), true, combblas::maximum<double>());
assignments.ParallelRead(std::string(argv[2]), true, combblas::maximum<int>());
std::vector<int> local_idx_map;
combblas::SpCCols<int, double> locmat = A.InducedSubgraphs2Procs(assignments, local_idx_map);
for (auto colit = locmat.begcol(); colit != locmat.endcol(); ++colit) {
for (auto nzit = locmat.begnz(colit); nzit != locmat.endnz(colit); ++nzit) {
std::cout << myrank << ": " << local_idx_map[nzit.rowid()]+1 << "\t" << local_idx_map[colit.colid()]+1 << "\t" << nzit.value() << std::endl;
}
}
std::cout << std::endl;
}
MPI_Finalize();
return 0;
}
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