/*
//@HEADER
// ************************************************************************
//
//                        Kokkos v. 2.0
//              Copyright (2014) Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Christian R. Trott (crtrott@sandia.gov)
//
// ************************************************************************
//@HEADER
*/

#include <Kokkos_Core.hpp>
#include <gtest/gtest.h>
#include <cstdio>
#include <PerfTest_Category.hpp>

namespace Test {

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

  double time1,time2,time3,time4,time5,time6,time7,time8,time_raw = 100000.0;
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double*,Layout> a("A1",N8);
    }
    time1 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double**,Layout> a("A2",N4,N4);
    }
    time2 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double***,Layout> a("A3",N3,N3,N2);
    }
    time3 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double****,Layout> a("A4",N2,N2,N2,N2);
    }
    time4 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double*****,Layout> a("A5",N2,N2,N1,N1,N2);
    }
    time5 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double******,Layout> a("A6",N2,N1,N1,N1,N1,N2);
    }
    time6 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double*******,Layout> a("A7",N2,N1,N1,N1,N1,N1,N1);
    }
    time7 = timer.seconds()/R;
  }
  {
    Kokkos::Timer timer;
    for(int r=0; r<R; r++) {
      Kokkos::View<double********,Layout> a("A8",N1,N1,N1,N1,N1,N1,N1,N1);
    }
    time8 = timer.seconds()/R;
  }
  #if defined(KOKKOS_ENABLE_CUDA_LAMBDA) || !defined(KOKKOS_ENABLE_CUDA)
  {
    Kokkos::Timer timer;
    for(int r=0;r<R;r++) {
      double* a_ptr = (double*) Kokkos::kokkos_malloc("A", sizeof(double)*N8);
      Kokkos::parallel_for(N8, KOKKOS_LAMBDA (const int& i) {
        a_ptr[i] = 0.0;
      });
      Kokkos::fence();
      Kokkos::kokkos_free(a_ptr);
    }
    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);
  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);
  printf("   Rank6: %lf s   %lf MB   %lf GB/s\n",time6,size,size/1024/time6);
  printf("   Rank7: %lf s   %lf MB   %lf GB/s\n",time7,size,size/1024/time7);
  printf("   Rank8: %lf s   %lf MB   %lf GB/s\n",time8,size,size/1024/time8);
}

TEST_F( default_exec, ViewCreate ) {
  printf("Create View Performance for LayoutLeft:\n");
  run_allocateview_tests<Kokkos::LayoutLeft>(10,1);
  printf("Create View Performance for LayoutRight:\n");
  run_allocateview_tests<Kokkos::LayoutRight>(10,1);
}

}