rcbTest.cpp

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//   Zoltan2: A package of combinatorial algorithms for scientific computing
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#include <Zoltan2_config.h>
#include <Zoltan2_TestHelpers.hpp>
#include <Zoltan2_BasicVectorAdapter.hpp>
#include <Zoltan2_XpetraMultiVectorAdapter.hpp>
#include <Zoltan2_PartitioningSolution.hpp>
#include <Zoltan2_PartitioningProblem.hpp>

using Teuchos::RCP;
using Teuchos::rcp;

typedef Tpetra::MultiVector<zscalar_t, zlno_t, zgno_t, znode_t> tMVector_t;
typedef Zoltan2::BasicUserTypes<zscalar_t, zlno_t, zgno_t> myTypes_t;
// Need to use zgno_t as zzgid_t in basic types, since zzgid_t=zgno_t in MultiVector


void testFromDataFile(
  const RCP<const Teuchos::Comm<int> > & comm,
  int nParts,
  string &filename,
  bool doRemap
)
{
  int me = comm->getRank();
  if (me == 0)
    std::cout << "Parallel partitioning of " << filename << ".mtx: "
         << nParts << " parts." << std::endl;

  std::string fname(filename);
  UserInputForTests uinput(testDataFilePath, fname, comm, true);

  RCP<tMVector_t> coords = uinput.getUICoordinates();
  if (me == 0)
    std::cout << "Multivector length = " << coords->getGlobalLength()
         << " Num vectors = " << coords->getNumVectors() << std::endl;

  RCP<const tMVector_t> coordsConst = rcp_const_cast<const tMVector_t>(coords);

  typedef Zoltan2::XpetraMultiVectorAdapter<tMVector_t> inputAdapter_t;
  inputAdapter_t ia(coordsConst);
  if (me == 0)
    std::cout << "Adapter constructed" << std::endl;

  Teuchos::ParameterList params("test params");
  params.set("debug_level", "basic_status");
  params.set("num_global_parts", nParts);
  params.set("algorithm", "rcb");
  params.set("imbalance_tolerance", 1.1);
  if (doRemap) params.set("remap_parts", true); // bool parameter

#ifdef HAVE_ZOLTAN2_MPI
  Zoltan2::PartitioningProblem<inputAdapter_t> problem(&ia, &params,
    MPI_COMM_WORLD);
#else
  Zoltan2::PartitioningProblem<inputAdapter_t> problem(&ia, &params);
#endif
  if (me == 0)
    std::cout << "Problem constructed" << std::endl;


  problem.solve();
  if (me == 0)
    std::cout << "Problem solved" << std::endl;
}

void serialTest(int numParts, bool doRemap)
{
  int numCoords = 1000;
  numParts *= 8;

  std::cout << "Serial partitioning: " << numParts << " parts." << std::endl;

  zgno_t *ids = new zgno_t [numCoords];
  if (!ids)
    throw std::bad_alloc();
  for (int i=0; i < numCoords; i++)
    ids[i] = i;
  ArrayRCP<zgno_t> globalIds(ids, 0, numCoords, true);

  Array<ArrayRCP<zscalar_t> > randomCoords(3);
  UserInputForTests::getUIRandomData(555, numCoords, 0, 10,
    randomCoords.view(0,3));

  typedef Zoltan2::BasicVectorAdapter<myTypes_t> inputAdapter_t;

  inputAdapter_t ia(numCoords, ids,
    randomCoords[0].getRawPtr(), randomCoords[1].getRawPtr(),
     randomCoords[2].getRawPtr(), 1,1,1);

  Teuchos::ParameterList params("test params");
  params.set("debug_level", "basic_status");
  params.set("num_global_parts", numParts);
  params.set("algorithm", "rcb");
  params.set("imbalance_tolerance", 1.1);
  if (doRemap) params.set("remap_parts", true); // bool parameter

#ifdef HAVE_ZOLTAN2_MPI
  Zoltan2::PartitioningProblem<inputAdapter_t> serialProblem(
    &ia, &params, MPI_COMM_SELF);
#else
  Zoltan2::PartitioningProblem<inputAdapter_t> serialProblem(&ia, &params);
#endif

  serialProblem.solve();
}

void meshCoordinatesTest(const RCP<const Teuchos::Comm<int> > & comm)
{
  int xdim = 40;
  int ydim = 60;
  int zdim = 20;
  UserInputForTests uinput(xdim, ydim, zdim, string("Laplace3D"), comm, true, true);

  RCP<tMVector_t> coords = uinput.getUICoordinates();

  size_t localCount = coords->getLocalLength();

  zscalar_t *x=NULL, *y=NULL, *z=NULL;
  x = coords->getDataNonConst(0).getRawPtr();
  y = coords->getDataNonConst(1).getRawPtr();
  z = coords->getDataNonConst(2).getRawPtr();

  const zgno_t *globalIds = coords->getMap()->getLocalElementList().getRawPtr();
  typedef Zoltan2::BasicVectorAdapter<tMVector_t> inputAdapter_t;

  inputAdapter_t ia(localCount, globalIds, x, y, z, 1, 1, 1);

  Teuchos::ParameterList params("test params");
  params.set("rectilinear", true); // bool parameter

#ifdef HAVE_ZOLTAN2_MPI
  Zoltan2::PartitioningProblem<inputAdapter_t> problem(&ia, &params, MPI_COMM_WORLD);
#else
  Zoltan2::PartitioningProblem<inputAdapter_t> problem(&ia, &params);
#endif

  problem.solve();
}

int main(int narg, char *arg[])
{
  Tpetra::ScopeGuard tscope(&narg, &arg);
  Teuchos::RCP<const Teuchos::Comm<int> > tcomm = Tpetra::getDefaultComm();

  int rank = tcomm->getRank();
  int nParts = tcomm->getSize();
  bool doRemap = false;
  string filename = "USAir97";

  // Read run-time options.
  Teuchos::CommandLineProcessor cmdp (false, false);
  cmdp.setOption("file", &filename, "Name of the Matrix Market file to read");
  cmdp.setOption("nparts", &nParts, "Number of parts.");
  cmdp.setOption("remap", "no-remap", &doRemap, "Remap part numbers.");
  cmdp.parse(narg, arg);

  meshCoordinatesTest(tcomm);

  testFromDataFile(tcomm, nParts, filename, doRemap);

  if (rank == 0)
    serialTest(nParts, doRemap);

  if (rank == 0)
    std::cout << "PASS" << std::endl;
}