size_t pitch, int width, int height) { for (int r = 0; r < height; ++r) { float* row = (float*)((char*)devPtr + r * pitch); for (int c = 0; c < width; ++c) { float element = row[c]; } } } 以下代码示例分配了一个width x height x depth的3D浮点数组,并展示了如...
#include<opencv2/highgui.hpp>#include<opencv2/cudaimgproc.hpp>cv::Mat img=cv::imread("image.png",IMREAD_GRAYSCALE);cv::cuda::GpuMat dst,src;src.upload(img);cv::Ptr<cv::cuda::CLAHE>ptr_clahe=cv::cuda::createCLAHE(5.0,cv::Size(8,8));ptr_clahe->apply(src,dst);cv::Mat result;...
int N) { int i = blockDim.x * blockIdx.x + threadIdx.x; if (i < N) C[i] = A[i] + B[i]; } // Host code int main() { int N = ...; size_t size = N * sizeof(float); // Allocate input vectors h_A and h_B in host memory float* h_A = (float*)malloc(siz...
int ai = offset * (2 * thid + 1) - 1; int bi = offset * (2 * thid + 2) - 1;Copy float t = temp[ai]; temp[ai] = temp[bi]; temp[bi] += t; } } __syncthreads();E Copy g_odata[2 * thid] = temp[2 * thid]; // write results to device memory g_odata[...
image 代码语言:javascript 代码运行次数:0 运行 AI代码解释 3.纹理变量(引用)必须声明为文件作用域内的全局变量。4.形式:分为一维纹理内存 和 二维纹理内存。4.1.一维纹理内存4.1.1.用texture<类型>类型声明,如texture<float>texIn。4.1.2.通过cudaBindTexture()绑定到纹理内存中。4.1.3.通过tex1Dfetch()来读取...
void kernel(uchar4*pos,unsigned int width,unsigned int height,float time) { unsigned int index,x,y; for(x=0;x<width;x++) for(y=0;y<height;y++) { unsigned char r=(x+(int)time)&0xff; unsigned char g=(y+(int)time)&0xff; unsigned char b=((x+y)+(int)time)&0xff; index=...
vecAdd(float* A,float* B,float* C,int n) 要输入指向3段显存的指针名,也就是 d_a, d_b, d_c。 float*da =NULL; 定义空指针。 cudaMalloc((void**)&da, size); 申请显存,da 指向申请的显存,注意 cudaMalloc 函数传入指针的指针 (指向申请得到的显存的指针)。
int main(void) { kernel<<<1,1>>>(); printf("hellow world!\n"); return 0; } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 我们定义了一个空函数送给GPU跑,函数是空函数,什么也没做,白嫖一下GPU就退出,编译并运行: ...
Specify the logical base address of the image to disassemble. This option is only valid when disassembling a raw instruction binary (see option --binary), and is ignored when disassembling an Elf file. Default value: 0. --binary <SMxy> -b When this option is specified, the input file is...
This indicates that the device kernel image is invalid. cudaErrorDeviceUninitialized = 201 This most frequently indicates that there is no context bound to the current thread. This can also be returned if the context passed to an API call is not a valid handle (such as a context that has...