/*
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//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// this software without specific prior written permission.
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#include <Kokkos_Core.hpp>
#include <gtest/gtest.h>
#include <cstdio>
#include <PerfTest_Category.hpp>

namespace Test {

template<class ViewType>
double fill_view (ViewType& a, typename ViewType::const_value_type& val, int repeat){
  Kokkos::Timer timer;
  for(int i=0; i<repeat; i++) {
    Kokkos::deep_copy(a,val);
  }
  Kokkos::fence();
  return timer.seconds();
}


template<class Layout>
void run_fillview_tests123(int N, int R) {
  const int N1 = N;
  const int N2 = N1*N1;
  const int N3 = N2*N1;
  const int N4 = N2*N2;
  const int N8 = N4*N4;

  double time1,time2,time3,time_raw = 100000.0;
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    time1 = fill_view(a,1.1,R)/R;
  }
  {
    Kokkos::View<double**,Layout> a("A2",N4,N4);
    time2 = fill_view(a,1.1,R)/R;
  }
  {
    Kokkos::View<double***,Layout> a("A3",N3,N3,N2);
    time3 = fill_view(a,1.1,R)/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    double* a_ptr = a.data();
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 1.1;
      });
    }
    Kokkos::fence();
    time_raw = timer.seconds()/R;
  }
  #endif
  double size = 1.0*N8*8/1024/1024;
  printf("   Raw:   %lf s   %lf MB   %lf GB/s\n",time_raw,size,size/1024/time_raw);
  printf("   Rank1: %lf s   %lf MB   %lf GB/s\n",time1,size,size/1024/time1);
  printf("   Rank2: %lf s   %lf MB   %lf GB/s\n",time2,size,size/1024/time2);
  printf("   Rank3: %lf s   %lf MB   %lf GB/s\n",time3,size,size/1024/time3);
}

template<class Layout>
void run_fillview_tests45(int N, int R) {
  const int N1 = N;
  const int N2 = N1*N1;
  const int N4 = N2*N2;
  const int N8 = N4*N4;

  double time4,time5,time_raw = 100000.0;
  {
    Kokkos::View<double****,Layout> a("A4",N2,N2,N2,N2);
    time4 = fill_view(a,1.1,R)/R;
  }
  {
    Kokkos::View<double*****,Layout> a("A5",N2,N2,N1,N1,N2);
    time5 = fill_view(a,1.1,R)/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    double* a_ptr = a.data();
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 1.1;
      });
    }
    Kokkos::fence();
    time_raw = timer.seconds()/R;
  }
  #endif
  double size = 1.0*N8*8/1024/1024;
  printf("   Raw:   %lf s   %lf MB   %lf GB/s\n",time_raw,size,size/1024/time_raw);
  printf("   Rank4: %lf s   %lf MB   %lf GB/s\n",time4,size,size/1024/time4);
  printf("   Rank5: %lf s   %lf MB   %lf GB/s\n",time5,size,size/1024/time5);
}

template<class Layout>
void run_fillview_tests6(int N, int R) {
  const int N1 = N;
  const int N2 = N1*N1;
  const int N4 = N2*N2;
  const int N8 = N4*N4;

  double time6,time_raw = 100000.0;
  {
    Kokkos::View<double******,Layout> a("A6",N2,N1,N1,N1,N1,N2);
    time6 = fill_view(a,1.1,R)/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    double* a_ptr = a.data();
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 1.1;
      });
    }
    Kokkos::fence();
    time_raw = timer.seconds()/R;
  }
  #endif
  double size = 1.0*N8*8/1024/1024;
  printf("   Raw:   %lf s   %lf MB   %lf GB/s\n",time_raw,size,size/1024/time_raw);
  printf("   Rank6: %lf s   %lf MB   %lf GB/s\n",time6,size,size/1024/time6);
}

template<class Layout>
void run_fillview_tests7(int N, int R) {
  const int N1 = N;
  const int N2 = N1*N1;
  const int N4 = N2*N2;
  const int N8 = N4*N4;

  double time7,time_raw = 100000.0;
  {
    Kokkos::View<double*******,Layout> a("A7",N2,N1,N1,N1,N1,N1,N1);
    time7 = fill_view(a,1.1,R)/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    double* a_ptr = a.data();
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 1.1;
      });
    }
    Kokkos::fence();
    time_raw = timer.seconds()/R;
  }
  #endif
  double size = 1.0*N8*8/1024/1024;
  printf("   Raw:   %lf s   %lf MB   %lf GB/s\n",time_raw,size,size/1024/time_raw);
  printf("   Rank7: %lf s   %lf MB   %lf GB/s\n",time7,size,size/1024/time7);
}

template<class Layout>
void run_fillview_tests8(int N, int R) {
  const int N1 = N;
  const int N2 = N1*N1;
  const int N4 = N2*N2;
  const int N8 = N4*N4;

  double time8,time_raw = 100000.0;
  {
    Kokkos::View<double********,Layout> a("A8",N1,N1,N1,N1,N1,N1,N1,N1);
    time8 = fill_view(a,1.1,R)/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::View<double*,Layout> a("A1",N8);
    double* a_ptr = a.data();
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 1.1;
      });
    }
    Kokkos::fence();
    time_raw = timer.seconds()/R;
  }
  #endif
  double size = 1.0*N8*8/1024/1024;
  printf("   Raw:   %lf s   %lf MB   %lf GB/s\n",time_raw,size,size/1024/time_raw);
  printf("   Rank8: %lf s   %lf MB   %lf GB/s\n",time8,size,size/1024/time8);
}

}
