cuda-samples/Samples/simpleVulkanMMAP/MonteCarloPi.h
2020-05-18 22:22:06 +05:30

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3.6 KiB
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/* Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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#pragma once
#ifndef __PISIM_H__
#define __PISIM_H__
#include <vector>
#include <cuda_runtime_api.h>
#include <curand.h>
#include <curand_kernel.h>
#include <cuda.h>
#include "helper_multiprocess.h"
typedef float vec2[2];
class MonteCarloPiSimulation
{
size_t m_numPoints;
// Pointers to Cuda allocated buffers which are imported and used by vulkan as vertex buffer
vec2 *m_xyVector;
float *m_pointsInsideCircle;
// Pointers to device and host allocated memories storing number of points that are inside the unit circle
float *m_numPointsInCircle;
float *m_hostNumPointsInCircle;
int m_blocks, m_threads;
// Total size of allocations created by cuMemMap Apis. This size is the sum of sizes of
// m_xyVector and m_pointsInsideCircle buffers.
size_t m_totalAllocationSize;
// Shareable Handles(a file descriptor on Linux and NT Handle on Windows), used for sharing cuda
// allocated memory with Vulkan
ShareableHandle m_posShareableHandle, m_inCircleShareableHandle;
// Cuda Device corresponding to the Vulkan Physical device
int m_cudaDevice;
// Track and accumulate total points that have been simulated since start of the sample.
// The idea is to get a closer approximation to PI with time.
size_t m_totalPointsInsideCircle;
size_t m_totalPointsSimulated;
void setupSimulationAllocations();
void cleanupSimulationAllocations();
void getIdealExecutionConfiguration();
public:
MonteCarloPiSimulation(size_t num_points);
~MonteCarloPiSimulation();
void initSimulation(int cudaDevice, cudaStream_t stream = 0);
void stepSimulation(float time, cudaStream_t stream = 0);
static void computePiCallback(void *args);
size_t getNumPoints() const {
return m_numPoints;
}
float getNumPointsInCircle() const {
return *m_hostNumPointsInCircle;
}
ShareableHandle &getPositionShareableHandle() {
return m_posShareableHandle;
}
ShareableHandle &getInCircleShareableHandle() {
return m_inCircleShareableHandle;
}
};
#endif // __PISIM_H__