kokkos_test.cpp

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#include <View_Types.h>
#include <TRUSTTab.h>
#include <iostream>
#include <Device.h>
#include <ParserView.h>
#define KOKKOS_IMPL_PUBLIC_INCLUDE
#include <Kokkos_UnorderedMap.hpp>
#include <Kokkos_UniqueToken.hpp>
#include <TRUSTTrav.h>
 
/*! Teste les methodes de l'interface Kokkos utilisees dans TRUST
 */
void kokkos_self_test()
{
#ifndef NDEBUG
#ifdef TRUST_USE_GPU
  static bool kokkos_self_tested_ = false;
 
  if (kokkos_self_tested_) return;
  kokkos_self_tested_=true;
 
  // Tab dimensions:
  int nb_elem = 3;
  int nb_compo = 2;
  DoubleTab a(nb_elem, nb_compo);
  a=1.0;
  DoubleTab b(nb_elem, nb_compo);
  b=2.0;
 
  // Check DoubleTabView:
  {
    DoubleTabView b_v = b.view_rw();
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(const int i)
    {
      assert(b_v(i, 0) == 2);
      for (int j = 0; j < nb_compo; j++)
        b_v(i, j) = 2 * b_v(i, j);
    });
    Kokkos::fence();
    assert(b(0, 0) == 4); // Retour sur le host et verification
  }
  // Check CDoubleTabView:
  {
    CDoubleTabView a_v = a.view_ro();
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(const int i)
    {
      assert(a_v(i, 0) == 1);
    });
    Kokkos::fence();
    assert(a(0, 0) == 1); // Verification sur le host
  }
  // Check basic loop:
  {
    a = 1;
    b = 2;
    CDoubleTabView a_v = a.view_ro();
    DoubleTabView b_v = b.view_rw();
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(
                           const int i)
    {
      for (int j = 0; j < nb_compo; j++)
        {
          b_v(i, j) = 2 * b_v(i, j) + a_v(i, j);
          //printf("KOKKOS: %p %e\n", b_v.data(), b_v(i, j));
        }
    });
    Kokkos::fence();
    assert(est_egal(b(0, 0), 5)); // Retour sur le host et verification
  }
 
  // Check basic loop on vect
  {
    DoubleVect u(nb_elem);
    u = 1.0;
    ArrOfDouble v(nb_elem);
    v = 2.0;
    CDoubleArrView a_v = u.view_ro();
    DoubleArrView b_v = v.view_rw();
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(const int i)
    {
      b_v(i) = 2 * b_v(i) + a_v(i);
    });
    Kokkos::fence();
    assert(est_egal(v(0), 5)); // Retour sur le host et verification
  }
  // Check DoubleVect built as a DoubleTab
  {
    DoubleTab tab(nb_elem);
    DoubleArrView vect_v = static_cast<DoubleVect&>(tab).view_rw(); // It works but ToDo Kokkos, try to do better ? DoubleArrView vect_v = tab.view_rw(); ?
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(const int i)
    {
      vect_v(i) = 2;
    });
  }
  // Check DoubleTab aliased by a DoubleVect
  {
    int dim = 3;
    DoubleTab tab(nb_elem, dim);
    DoubleVect& vect = tab;
    DoubleArrView vect_v = vect.view_rw();
    int size = vect.size_array();
    Kokkos::parallel_for(size, KOKKOS_LAMBDA(const int i)
    {
      vect_v(i) = 2;
    });
  }
  // Verification des adresses memoire:
  {
    DoubleTab tab(nb_elem,2);
    for (int i=0; i<nb_elem; i++)
      for (int j=0; j<2; j++)
        tab(i,j) = i + 0.1*j;
    CDoubleTabView tab_v = tab.view_ro();
    // La creation de la vue fait une copie de u sur le device:
    //printf("Provisoire OpenMP adresse host: [%p] device: [%p]\n",(void*)tab.data(), (void*)addrOnDevice(tab));
    assert(a.data() != addrOnDevice(a));
    // On verifie les adresses memoires de la vue:
    //printf("Provisoire Kokkos adresse            device: [%p]\n",(void*)tab_v.data());
    //assert(tab_v.h_view.view_host()==tab.data());
    assert(tab_v.data()==addrOnDevice(tab));
    //debug_device_view(tab_v, tab);
  }
  // Changement de la zone memoire sur le device avec OpenMP:
  {
    DoubleTab tab(nb_elem,2);
    for (int i=0; i<nb_elem; i++)
      for (int j=0; j<2; j++)
        tab(i,j) = i + 0.1*j;
    CDoubleTabView tab_v = tab.view_ro();
    assert(tab_v.data()==addrOnDevice(tab)); // Meme adresse
    //printf("Provisoire OpenMP device before: [%p]\n", (void*)addrOnDevice(tab));
    deleteOnDevice(tab);
    allocateOnDevice(tab);
    //printf("Provisoire OpenMP device after: [%p]\n", (void*)addrOnDevice(tab));
    CDoubleTabView tab_v2 = tab.view_ro();
    assert(tab_v2.data()==addrOnDevice(tab)); // Meme adresse
  }
  // C++ object in Kokkos region
  {
    ArrOfDouble f(nb_elem);
    f = 0;
    std::string expr("2*x+2");
    // Parser sur le device;
    ParserView parser(expr, 1);
    parser.addVar("x");
    parser.parseString();
    DoubleArrView f_v = f.view_rw();
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(
                           const int i)
    {
      int threadId = parser.acquire();
      double x = (double) i;
      parser.setVar(0, x, threadId);
      f_v(i) = parser.eval(threadId);
      parser.release(threadId);
    });
    assert(f(0) == 2);
    assert(f(nb_elem - 1) == 2 * nb_elem);
  }
  {
    // How to use VECT of TRUSTArray in Kokkos region ?
    using DoubleTravs = TRUST_Vector<DoubleTrav>;
    const int nb = 5;
    DoubleTravs tab(nb);
    Kokkos::Array<CDoubleTabView, nb> tabs;
    for (int n=0; n<nb; n++)
      {
        tab[n].resize(nb_elem);
        tab[n] = (double)n; // Initialize on host
        auto tab_view = tab[n].view_ro(); // Copy on the device
        tabs[n] = tab_view;
      }
    Kokkos::parallel_for(nb_elem, KOKKOS_LAMBDA(const int i)
    {
      for (int n=0; n<nb; n++)
        {
          auto tab_v = tabs[n];
          assert(tab_v(i,0)==n);
        }
    });
  }
// Some check:
  /*
  assert(a_v.is_allocated());
  bool check = std::is_same<decltype(a_v)::memory_space, Kokkos::CudaSpace>::value;
  assert(check);
   */
 
// ToDo implement reference counter for a view on tab
  /*
  DoubleTab tab(N);
  DoubleArrView view = tab.ro();    // Data on device
  copyFromeDevice(tab);             // Data on host !
  // How to detect that now view is invalid and can't be used in a Kokkos region now ?
   Kokkos::parallel_for(N, KOKKOS_LAMBDA(const int elem) { view(elem) = 1.0; });
   */
#endif
#endif
}