/*
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*/

/**
 * @addtogroup hipMemcpy2DAsync hipMemcpy2DAsync
 * @{
 * @ingroup perfMemoryTest
 * `hipMemcpy2DAsync(void* dst, size_t dpitch, const void* src, size_t spitch,
 *     size_t width, size_t height, hipMemcpyKind kind, hipStream_t stream = 0)` -
 * Copies data between host and device.
 */

#include <hip_test_common.hh>
// #define ENABLE_DEBUG 1

#define NUM_SIZES 8
//  4KB, 8KB, 64KB, 256KB, 1 MB, 4MB, 16 MB, 16MB+10
static const unsigned int Sizes[NUM_SIZES] = {4096,    8192,    65536,    262144,
                                              1048576, 4194304, 16777216, 16777216 + 10};

static const unsigned int Iterations[2] = {1, 1000};

#define BUF_TYPES 4
//  16 ways to combine 4 different buffer types
#define NUM_SUBTESTS (BUF_TYPES * BUF_TYPES)

static void setData(void* ptr, unsigned int size, char value) {
  char* ptr2 = reinterpret_cast<char*>(ptr);
  for (unsigned int i = 0; i < size; i++) {
    ptr2[i] = value;
  }
}

static bool hipPerfBufferCopyRectSpeed_test(int p_tests) {
  unsigned int bufSize_;
  unsigned int numIter;
  bool hostMalloc[2] = {false};
  bool hostRegister[2] = {false};
  bool unpinnedMalloc[2] = {false};
  void* memptr[2] = {NULL};
  void* alignedmemptr[2] = {NULL};
  void* srcBuffer = NULL;
  void* dstBuffer = NULL;

  int numTests = (p_tests == -1) ? (NUM_SIZES * NUM_SUBTESTS * 2 - 1) : p_tests;
  int test = (p_tests == -1) ? 0 : p_tests;

  for (; test <= numTests; test++) {
    unsigned int srcTest = (test / NUM_SIZES) % BUF_TYPES;
    unsigned int dstTest = (test / (NUM_SIZES * BUF_TYPES)) % BUF_TYPES;
    bufSize_ = Sizes[test % NUM_SIZES];
    hostMalloc[0] = hostMalloc[1] = false;
    hostRegister[0] = hostRegister[1] = false;
    unpinnedMalloc[0] = unpinnedMalloc[1] = false;
    srcBuffer = dstBuffer = 0;
    memptr[0] = memptr[1] = 0;
    alignedmemptr[0] = alignedmemptr[1] = NULL;

    size_t width = static_cast<size_t>(sqrt(static_cast<float>(bufSize_)));

    if (srcTest == 3) {
      hostRegister[0] = true;
    } else if (srcTest == 2) {
      hostMalloc[0] = true;
    } else if (srcTest == 1) {
      unpinnedMalloc[0] = true;
    }

    if (dstTest == 1) {
      unpinnedMalloc[1] = true;
    } else if (dstTest == 2) {
      hostMalloc[1] = true;
    } else if (dstTest == 3) {
      hostRegister[1] = true;
    }

    numIter = Iterations[test / (NUM_SIZES * NUM_SUBTESTS)];

    if (hostMalloc[0]) {
      HIP_CHECK(hipHostMalloc(reinterpret_cast<void**>(&srcBuffer), bufSize_, 0));
      setData(srcBuffer, bufSize_, 0xd0);
    } else if (hostRegister[0]) {
      memptr[0] = malloc(bufSize_ + 4096);
      alignedmemptr[0] = reinterpret_cast<void*>(memptr[0]);
      srcBuffer = alignedmemptr[0];
      setData(srcBuffer, bufSize_, 0xd0);
      HIP_CHECK(hipHostRegister(srcBuffer, bufSize_, 0));
    } else if (unpinnedMalloc[0]) {
      memptr[0] = malloc(bufSize_ + 4096);
      alignedmemptr[0] = reinterpret_cast<void*>(memptr[0]);
      srcBuffer = alignedmemptr[0];
      setData(srcBuffer, bufSize_, 0xd0);
    } else {
      HIP_CHECK(hipMalloc(&srcBuffer, bufSize_));
      HIP_CHECK(hipMemset(srcBuffer, 0xd0, bufSize_));
    }

    if (hostMalloc[1]) {
      HIP_CHECK(hipHostMalloc(reinterpret_cast<void**>(&dstBuffer), bufSize_, 0));
    } else if (hostRegister[1]) {
      memptr[1] = malloc(bufSize_ + 4096);
      alignedmemptr[1] = reinterpret_cast<void*>(memptr[0]);
      dstBuffer = alignedmemptr[1];
      HIP_CHECK(hipHostRegister(dstBuffer, bufSize_, 0));
    } else if (unpinnedMalloc[1]) {
      memptr[1] = malloc(bufSize_ + 4096);
      alignedmemptr[1] = reinterpret_cast<void*>(memptr[0]);
      dstBuffer = alignedmemptr[1];
    } else {
      HIP_CHECK(hipMalloc(&dstBuffer, bufSize_));
    }

    //  warm up
    HIP_CHECK(hipMemcpy2D(dstBuffer, width, srcBuffer, width, width, width, hipMemcpyDefault));

    // measure performance based on host time
    auto all_start = std::chrono::steady_clock::now();

    for (unsigned int i = 0; i < numIter; i++) {
      HIP_CHECK(hipMemcpy2DAsync(dstBuffer, width, srcBuffer, width, width, width, hipMemcpyDefault,
                                 NULL));
    }
    HIP_CHECK(hipDeviceSynchronize());

    auto all_end = std::chrono::steady_clock::now();
    std::chrono::duration<double> elapsed_secs = all_end - all_start;

    // read speed in GB/s
    double perf = (static_cast<double>(bufSize_ * numIter) * static_cast<double>(1e-09)) /
                  elapsed_secs.count();

    const char* strSrc = NULL;
    const char* strDst = NULL;
    if (hostMalloc[0])
      strSrc = "hHM";
    else if (hostRegister[0])
      strSrc = "hHR";
    else if (unpinnedMalloc[0])
      strSrc = "unp";
    else
      strSrc = "hM";

    if (hostMalloc[1])
      strDst = "hHM";
    else if (hostRegister[1])
      strDst = "hHR";
    else if (unpinnedMalloc[1])
      strDst = "unp";
    else
      strDst = "hM";

    // Double results when src and dst are both on device
    if ((!hostMalloc[0] && !hostRegister[0] && !unpinnedMalloc[0]) &&
        (!hostMalloc[1] && !hostRegister[1] && !unpinnedMalloc[1]))
      perf *= 2.0;
    // Double results when src and dst are both in sysmem
    if ((hostMalloc[0] || hostRegister[0] || unpinnedMalloc[0]) &&
        (hostMalloc[1] || hostRegister[1] || unpinnedMalloc[1]))
      perf *= 2.0;

    CONSOLE_PRINT("hipPerfBufferCopyRectSpeed[%d]\t( %u )\ts:%s d:%s\ti:%u\t(GB/s) perf\t%.2f\n",
                  test, bufSize_, strSrc, strDst, numIter, (float)perf);

    //  Free src
    if (hostMalloc[0]) {
      HIP_CHECK(hipHostFree(srcBuffer));
    } else if (hostRegister[0]) {
      HIP_CHECK(hipHostUnregister(srcBuffer));
      free(memptr[0]);
    } else if (unpinnedMalloc[0]) {
      free(memptr[0]);
    } else {
      HIP_CHECK(hipFree(srcBuffer));
    }

    //  Free dst
    if (hostMalloc[1]) {
      HIP_CHECK(hipHostFree(dstBuffer));
    } else if (hostRegister[1]) {
      HIP_CHECK(hipHostUnregister(dstBuffer));
      free(memptr[1]);
    } else if (unpinnedMalloc[1]) {
      free(memptr[1]);
    } else {
      HIP_CHECK(hipFree(dstBuffer));
    }
  }
  return true;
}

/**
 * Test Description
 * ------------------------
 *  - Verify hipPerfBufferCopy status.
 * Test source
 * ------------------------
 *  - perftests/memory/hipPerfBufferCopyRectSpeed.cc
 * Test requirements
 * ------------------------
 *  - HIP_VERSION >= 5.6
 */

TEST_CASE("Perf_hipPerfBufferCopyRectSpeed_test") {
  int numDevices = 0;
  HIP_CHECK(hipGetDeviceCount(&numDevices));

  if (numDevices <= 0) {
    SUCCEED(
        "Skipped testcase hipPerfBufferCopyRectSpeed"
        "as there is no device to test.");
  } else {
    int deviceId = 0;
    HIP_CHECK(hipSetDevice(deviceId));
    hipDeviceProp_t props;
    HIP_CHECK(hipGetDeviceProperties(&props, deviceId));

    CONSOLE_PRINT(
        "hipPerfBufferCopyRectSpeed - info: Set device to %d : %s Legend: unp - unpinned(malloc), "
        "hM - hipMalloc(device)\n        hHR - hipHostRegister(pinned), hHM - "
        "hipHostMalloc(prePinned)\n",
        deviceId, props.name);

    REQUIRE(true == hipPerfBufferCopyRectSpeed_test(1));
  }
}

/**
 * End doxygen group perfMemoryTest.
 * @}
 */