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101 lines
3.6 KiB
C++
101 lines
3.6 KiB
C++
/* Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of NVIDIA CORPORATION nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#ifndef __PISIM_H__
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#define __PISIM_H__
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#include <vector>
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#include <cuda_runtime_api.h>
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#include <curand.h>
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#include <curand_kernel.h>
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#include <cuda.h>
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#include "helper_multiprocess.h"
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typedef float vec2[2];
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class MonteCarloPiSimulation
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{
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size_t m_numPoints;
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// Pointers to Cuda allocated buffers which are imported and used by vulkan as vertex buffer
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vec2 *m_xyVector;
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float *m_pointsInsideCircle;
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// Pointers to device and host allocated memories storing number of points that are inside the unit circle
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float *m_numPointsInCircle;
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float *m_hostNumPointsInCircle;
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int m_blocks, m_threads;
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// Total size of allocations created by cuMemMap Apis. This size is the sum of sizes of
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// m_xyVector and m_pointsInsideCircle buffers.
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size_t m_totalAllocationSize;
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// Shareable Handles(a file descriptor on Linux and NT Handle on Windows), used for sharing cuda
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// allocated memory with Vulkan
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ShareableHandle m_posShareableHandle, m_inCircleShareableHandle;
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// Cuda Device corresponding to the Vulkan Physical device
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int m_cudaDevice;
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// Track and accumulate total points that have been simulated since start of the sample.
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// The idea is to get a closer approximation to PI with time.
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size_t m_totalPointsInsideCircle;
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size_t m_totalPointsSimulated;
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void setupSimulationAllocations();
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void cleanupSimulationAllocations();
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void getIdealExecutionConfiguration();
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public:
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MonteCarloPiSimulation(size_t num_points);
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~MonteCarloPiSimulation();
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void initSimulation(int cudaDevice, cudaStream_t stream = 0);
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void stepSimulation(float time, cudaStream_t stream = 0);
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static void computePiCallback(void *args);
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size_t getNumPoints() const {
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return m_numPoints;
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}
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float getNumPointsInCircle() const {
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return *m_hostNumPointsInCircle;
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}
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ShareableHandle &getPositionShareableHandle() {
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return m_posShareableHandle;
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}
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ShareableHandle &getInCircleShareableHandle() {
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return m_inCircleShareableHandle;
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}
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};
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#endif // __PISIM_H__
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