text: /* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *  * Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *  * 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.
   *  * Neither the name of NVIDIA CORPORATION nor the names of its
   *    contributors may be used to endorse or promote products derived
   *    from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``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 THE COPYRIGHT OWNER OR
   * 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.
   */
  
  
  #include "../inc/test.h"
  
  #include <sstream>
  #include <iomanip>
  #include <stdexcept>
  #include <memory>
  #include <iostream>
  #include <cassert>
  #include <typeinfo>
  #include <stdio.h>
  #include <helper_timer.h>
  #include <cuda_runtime.h>
  
  #include <math.h>
  
  #include "../inc/piestimator.h"
  
  template <typename Real>
  bool Test<Real>::operator()() {
    using std::endl;
    using std::setw;
    using std::stringstream;
  
    StopWatchInterface *timer = NULL;
    sdkCreateTimer(&timer);
  
    // Get device properties
    struct cudaDeviceProp deviceProperties;
    cudaError_t cudaResult = cudaGetDeviceProperties(&deviceProperties, device);
  
    if (cudaResult != cudaSuccess) {
      std::string msg("Could not get device properties: ");
      msg += cudaGetErrorString(cudaResult);
      throw std::runtime_error(msg);
    }
  
    // Evaluate on GPU
    printf("Estimating Pi on GPU (%s)\n\n", deviceProperties.name);
    PiEstimator<Real> estimator(numSims, device, threadBlockSize);
    sdkStartTimer(&timer);
    Real result = estimator();
    sdkStopTimer(&timer);
    elapsedTime = sdkGetAverageTimerValue(&timer) / 1000.0f;
  
    // Tolerance to compare result with expected
    // This is just to check that nothing has gone very wrong with the
    // test, the actual accuracy of the result depends on the number of
    // Monte Carlo trials
    const Real tolerance = static_cast<Real>(0.01);
  
    // Display results
    Real abserror = fabs(result - static_cast<Real>(PI));
    Real relerror = abserror / static_cast<Real>(PI);
    printf("Precision:      %s\n",
           (typeid(Real) == typeid(double)) ? "double" : "single");
    printf("Number of sims: %d\n", numSims);
    printf("Tolerance:      %e\n", tolerance);
    printf("GPU result:     %e\n", result);
    printf("Expected:       %e\n", PI);
    printf("Absolute error: %e\n", abserror);
    printf("Relative error: %e\n\n", relerror);
  
    // Check result
    if (relerror > tolerance) {
      printf("computed result (%e) does not match expected result (%e).\n",
             result, PI);
      pass = false;
    } else {
      pass = true;
    }
  
    // Print results
    printf(
        "MonteCarloEstimatePiInlineQ, Performance = %.2f sims/s, Time = "
        "%.2f(ms), NumDevsUsed = %u, Blocksize = %u\n",
        numSims / elapsedTime, elapsedTime * 1000.0f, 1, threadBlockSize);
  
    sdkDeleteTimer(&timer);
  
    return pass;
  }
  
  // Explicit template instantiation
  template struct Test<float>;
  template struct Test<double>;
  