/* Copyright (c) 2010 - 2021 Advanced Micro Devices, Inc.

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE. */

#include "OCLPerfFlush.h"

#include <Timer.h>
#include <assert.h>
#include <stdio.h>

#include <sstream>
#include <string>

#include "CL/cl.h"

static const cl_uint Iterations = 0x10000;
static const cl_uint IterationDivider = 2;
static const size_t MaxBuffers = IterationDivider;
static size_t BufSize = 0x1000;

const static char* strKernel =
    "__kernel void factorial(__global uint* out)                        \n"
    "{                                                                  \n"
    "   uint id = get_global_id(0);                                     \n"
    "   uint factorial = 1;                                             \n"
    "   for (uint i = 1; i < (id / 0x10000); ++i)                       \n"
    "   {                                                               \n"
    "       factorial *= i;                                             \n"
    "   }                                                               \n"
    "    out[id] = factorial;                                            \n"
    "}                                                                  \n";

unsigned int NumTests = 3;

OCLPerfFlush::OCLPerfFlush() {
  _numSubTests = NumTests;
  failed_ = false;
}

OCLPerfFlush::~OCLPerfFlush() {}

void OCLPerfFlush::open(unsigned int test, char* units, double& conversion,
                        unsigned int deviceId) {
  OCLTestImp::open(test, units, conversion, deviceId);
  CHECK_RESULT((error_ != CL_SUCCESS), "Error opening test");
  test_ = test;

  cl_device_type deviceType;
  error_ = _wrapper->clGetDeviceInfo(devices_[deviceId], CL_DEVICE_TYPE,
                                     sizeof(deviceType), &deviceType, NULL);
  CHECK_RESULT((error_ != CL_SUCCESS), "CL_DEVICE_TYPE failed");

  if (!(deviceType & CL_DEVICE_TYPE_GPU)) {
    printf("GPU device is required for this test!\n");
    failed_ = true;
    return;
  }
  size_t maxWorkGroupSize = 1;
  cl_uint computePower = 1;
  error_ = _wrapper->clGetDeviceInfo(
      devices_[deviceId], CL_DEVICE_MAX_WORK_GROUP_SIZE,
      sizeof(maxWorkGroupSize), &maxWorkGroupSize, NULL);
  computePower *= static_cast<cl_uint>(maxWorkGroupSize);
  cl_uint maxComputeUnits = 1;
  error_ = _wrapper->clGetDeviceInfo(
      devices_[deviceId], CL_DEVICE_MAX_COMPUTE_UNITS, sizeof(maxComputeUnits),
      &maxComputeUnits, NULL);
  computePower *= 32 * maxComputeUnits;
  BufSize = (BufSize < static_cast<size_t>(computePower))
                ? static_cast<size_t>(computePower)
                : BufSize;
  program_ = _wrapper->clCreateProgramWithSource(context_, 1, &strKernel, NULL,
                                                 &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateProgramWithSource()  failed");
  error_ = _wrapper->clBuildProgram(program_, 1, &devices_[deviceId], NULL,
                                    NULL, NULL);
  if (error_ != CL_SUCCESS) {
    char programLog[1024];
    _wrapper->clGetProgramBuildInfo(program_, devices_[deviceId],
                                    CL_PROGRAM_BUILD_LOG, 1024, programLog, 0);
    printf("\n%s\n", programLog);
    fflush(stdout);
  }
  CHECK_RESULT((error_ != CL_SUCCESS), "clBuildProgram() failed");
  kernel_ = _wrapper->clCreateKernel(program_, "factorial", &error_);
  CHECK_RESULT((error_ != CL_SUCCESS), "clCreateKernel() failed");

  cl_mem buffer;
  for (size_t i = 0; i < MaxBuffers; ++i) {
    buffer = _wrapper->clCreateBuffer(context_, CL_MEM_READ_WRITE,
                                      BufSize * sizeof(cl_uint), NULL, &error_);
    CHECK_RESULT((error_ != CL_SUCCESS), "clCreateBuffer() failed");
    buffers_.push_back(buffer);
  }
}

void OCLPerfFlush::run(void) {
  if (failed_) {
    return;
  }
  for (size_t y = 0; y < IterationDivider; ++y) {
    cl_mem buffer = buffers()[y];

    error_ = _wrapper->clSetKernelArg(kernel_, 0, sizeof(cl_mem), &buffer);
    CHECK_RESULT((error_ != CL_SUCCESS), "clSetKernelArg() failed");

    size_t gws[1] = {BufSize};
    error_ = _wrapper->clEnqueueNDRangeKernel(cmdQueues_[_deviceId], kernel_, 1,
                                              NULL, gws, NULL, 0, NULL, NULL);
    CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueNDRangeKernel() failed");
  }
  _wrapper->clFinish(cmdQueues_[_deviceId]);

  CPerfCounter timer;
  const char* descriptions[] = {
      "Single batch: ", "clFlush():    ", "clFinish():   "};

  timer.Reset();
  timer.Start();
  cl_uint x;
  for (x = 0; x < Iterations / IterationDivider; x++) {
    for (size_t y = 0; y < IterationDivider; ++y) {
      cl_mem buffer = buffers()[y];

      error_ = _wrapper->clSetKernelArg(kernel_, 0, sizeof(cl_mem), &buffer);
      CHECK_RESULT((error_ != CL_SUCCESS), "clSetKernelArg() failed");

      size_t gws[1] = {BufSize};
      error_ = _wrapper->clEnqueueNDRangeKernel(
          cmdQueues_[_deviceId], kernel_, 1, NULL, gws, NULL, 0, NULL, NULL);
      CHECK_RESULT((error_ != CL_SUCCESS), "clEnqueueNDRangeKernel() failed");
    }
    if (test_ == 1) {
      _wrapper->clFlush(cmdQueues_[_deviceId]);
    } else if (test_ == 2) {
      _wrapper->clFinish(cmdQueues_[_deviceId]);
    }
  }
  _wrapper->clFinish(cmdQueues_[_deviceId]);
  timer.Stop();

  std::stringstream stream;
  stream << "Loop[" << std::hex << Iterations << "], " << descriptions[test_];
  stream << "(sec)";
  testDescString = stream.str();
  _perfInfo = static_cast<float>(timer.GetElapsedTime());
}

unsigned int OCLPerfFlush::close(void) { return OCLTestImp::close(); }
