atinfinity/gpumat_memory_performance.cpp

## gpumat_memory_performance.cpp
#include <opencv2/core.hpp>
#include <opencv2/core/cuda.hpp>
#include <cuda_runtime.h>
#include <device_launch_parameters.h>
#include <iostream>

int main(int argc, const char * argv[])
{
    cudaFree(0); // dummy call

    const size_t width   = 256;
    const size_t height  = 256;
    const size_t elemSize = 12;
    for (int i = 0; i < 5; i++)
    {
#if 1
        cv::cuda::GpuMat d_img(cv::Size(width, height), CV_32FC3); // cudaMallocPitch is slow(only first call)
#else
        size_t step = 0;
        unsigned char *data = NULL;
        cudaMallocPitch(&data, &step, elemSize * width, height);
        cudaFree(data);
#endif
    }

    return 0;
}
	#include <opencv2/core.hpp>
	#include <opencv2/core/cuda.hpp>
	#include <cuda_runtime.h>
	#include <device_launch_parameters.h>
	#include <iostream>

	int main(int argc, const char * argv[])
	{
	cudaFree(0); // dummy call

	const size_t width = 256;
	const size_t height = 256;
	const size_t elemSize = 12;
	for (int i = 0; i < 5; i++)
	{
	#if 1
	cv::cuda::GpuMat d_img(cv::Size(width, height), CV_32FC3); // cudaMallocPitch is slow(only first call)
	#else
	size_t step = 0;
	unsigned char *data = NULL;
	cudaMallocPitch(&data, &step, elemSize * width, height);
	cudaFree(data);
	#endif
	}

	return 0;
	}
項目	内容
CPU	Intel Core i7-6700HQ 2.60GHz
メモリ	64GB
GPU	NVIDIA GeForce GTX 1060 / 6GB
OS	Windows 10 Pro 64bit
Visual Studioバージョン	Visual Studio 2015
CUDA	CUDA 9.1