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*/

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

#include <hip_test_common.hh>

#define NUM_SIZES 9
//  4KB, 8KB, 64KB, 256KB, 1 MB, 4MB, 16 MB, 16MB+10
static const unsigned int Sizes[NUM_SIZES] =
  {4096, 8192, 65536, 262144, 524288, 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 void checkData(void *ptr, unsigned int size, char value) {
  char *ptr2 = reinterpret_cast<char *>(ptr);
  for (unsigned int i = 0; i < size; i++) {
    if (ptr2[i] != value) {
      INFO("Validation failed at " << i << " Got " << ptr2[i] <<
                                           " Expected " << value);
      REQUIRE(false);
    }
  }
}

static bool hipPerfBufferCopySpeed_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] = NULL;
    alignedmemptr[0] = alignedmemptr[1] = NULL;

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

    //  warm up
    HIP_CHECK(hipMemcpy(dstBuffer, srcBuffer, bufSize_, 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(hipMemcpyAsync(dstBuffer, srcBuffer, bufSize_,
                               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;

    INFO("HIPPerfBufferCopySpeed[" << test << "]\t( " << bufSize_ <<
         ")\ts:" << strSrc << " d:" << strDst << "\ti:" << numIter <<
         "\t(GB/s) perf\t" << (float)perf);

    // Verification
    void* temp = malloc(bufSize_ + 4096);
    void* chkBuf = reinterpret_cast<void*>(temp);
    HIP_CHECK(hipMemcpy(chkBuf, dstBuffer, bufSize_, hipMemcpyDefault));
    checkData(chkBuf, bufSize_, 0xd0);
    free(temp);

    //  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 hipPerfBufferCopySpeed status.
* Test source
* ------------------------
*  - perftests/memory/hipPerfBufferCopySpeed.cc
* Test requirements
* ------------------------
*  - HIP_VERSION >= 5.6
*/

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

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

    INFO("hipPerfBufferCopySpeed - info: Set device to " << deviceId
         << " : " << props.name << "Legend: unp - unpinned(malloc),"
         " hM - hipMalloc(device)\n        hHR - hipHostRegister(pinned),"
         " hHM - hipHostMalloc(prePinned)\n");

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