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#include <cusp/csr_matrix.h>
#include <cusp/print.h>
#include <cusp/gallery/poisson.h>
#include <cusp/graph/connected_components.h>
#include <cusp/io/matrix_market.h>
#include "../timer.h"
template<typename MemorySpace, typename MatrixType>
void CC(const MatrixType& G)
{
typedef typename MatrixType::index_type IndexType;
typedef cusp::csr_matrix<IndexType,IndexType,MemorySpace> GraphType;
GraphType G_cc(G);
cusp::array1d<IndexType,MemorySpace> components(G.num_rows);
timer t;
size_t num_components = cusp::graph::connected_components(G_cc, components);
std::cout << "CC time : " << t.milliseconds_elapsed() << " (ms)." << std::endl;
std::cout << "Number of components : " << num_components << std::endl;
}
int main(int argc, char*argv[])
{
srand(time(NULL));
typedef int IndexType;
typedef float ValueType;
typedef cusp::host_memory MemorySpace;
cusp::csr_matrix<IndexType, ValueType, MemorySpace> A;
size_t size = 512;
if (argc == 1)
{
// no input file was specified, generate an example
std::cout << "Generated matrix (poisson5pt) ";
cusp::gallery::poisson5pt(A, size, size);
}
else if (argc == 2)
{
// an input file was specified, read it from disk
cusp::io::read_matrix_market_file(A, argv[1]);
std::cout << "Read matrix (" << argv[1] << ") ";
}
std::cout << "with shape (" << A.num_rows << "," << A.num_cols << ") and "
<< A.num_entries << " entries" << "\n\n";
std::cout << " Device ";
CC<cusp::device_memory>(A);
std::cout << " Host ";
CC<cusp::host_memory>(A);
return EXIT_SUCCESS;
}
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