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帮我在opencl代码上制作一个流程图,我不太明白它应该是什么样子。代码执行min(A+C)操作。
#define _CRT_SECURE_NO_WARNINGS #define CL_USE_DEPRECATED_OPENCL_1_2_APIS #include <CL/cl.h> #include <CL/cl_platform.h> #include <iostream> #include <cstdlib> #include <stdio.h> #define MAX_SOURCE_SIZE (0x100000) #define LIST_SIZE 128 int main(void) { int* A = new int[LIST_SIZE]; int* C = new int[LIST_SIZE]; int* B = new int[LIST_SIZE]; srand(time(0)); for (int i = 0; i < LIST_SIZE; i++) { A[i] = (rand() % 200) / 2.; C[i] = (rand() % 200) / 2.; } FILE* fp; char* source_str; size_t source_size; fp = fopen("kernel.cl", "r"); if (!fp) { fprintf(stderr, "Failed to load kernel.\n"); exit(1); } source_str = new char[MAX_SOURCE_SIZE]; source_size = fread(source_str, 1, MAX_SOURCE_SIZE, fp); fclose(fp); cl_platform_id platform_id = NULL; cl_device_id device_id = NULL; cl_uint ret_num_devices; cl_uint ret_num_platforms; cl_int ret = clGetPlatformIDs(1, &platform_id, &ret_num_platforms); ret = clGetDeviceIDs(platform_id, CL_DEVICE_TYPE_DEFAULT, 1, &device_id, &ret_num_devices); cl_context context = clCreateContext(NULL, 1, &device_id, NULL, NULL, &ret); cl_command_queue command_queue = clCreateCommandQueueWithProperties(context, device_id, 0, &ret); cl_mem a_mem_obj = clCreateBuffer(context, CL_MEM_READ_ONLY, LIST_SIZE * sizeof(int), NULL, &ret); cl_mem c_mem_obj = clCreateBuffer(context, CL_MEM_READ_ONLY, LIST_SIZE * sizeof(int), NULL, &ret); cl_mem b_mem_obj = clCreateBuffer(context, CL_MEM_WRITE_ONLY, LIST_SIZE * sizeof(int), NULL, &ret); ret = clEnqueueWriteBuffer(command_queue, a_mem_obj, CL_TRUE, 0, LIST_SIZE * sizeof(int), A, 0, NULL, NULL); ret = clEnqueueWriteBuffer(command_queue, c_mem_obj, CL_TRUE, 0, LIST_SIZE * sizeof(int), C, 0, NULL, NULL); cl_program program = clCreateProgramWithSource(context, 1, (const char**)&source_str, (const size_t*)&source_size, &ret); ret = clBuildProgram(program, 1, &device_id, NULL, NULL, NULL); cl_kernel kernel = clCreateKernel(program, "krn", &ret); ret = clSetKernelArg(kernel, 0, sizeof(cl_mem), (void*)&a_mem_obj); ret = clSetKernelArg(kernel, 1, sizeof(cl_mem), (void*)&c_mem_obj); ret = clSetKernelArg(kernel, 2, sizeof(cl_mem), (void*)&b_mem_obj); size_t global_item_size = LIST_SIZE; size_t local_item_size = 128; ret = clEnqueueNDRangeKernel(command_queue, kernel, 1, NULL, &global_item_size, &local_item_size, 0, NULL, NULL); ret = clEnqueueReadBuffer(command_queue, b_mem_obj, CL_TRUE, 0, LIST_SIZE * sizeof(int), B, 0, NULL, NULL); for (int i = 0; i < LIST_SIZE; i++) { printf("%d. sum: %d\n", i, B[i]); } int min = B[0]; int minIndex = 0; for (int i = 0; i < LIST_SIZE; i++) { if (B[i] < min) { min = B[i]; minIndex = i; } } printf("\n\n%d. Minimum min(A+C) = %d\n", minIndex, min); ret = clFlush(command_queue); ret = clFinish(command_queue); ret = clReleaseKernel(kernel); ret = clReleaseProgram(program); ret = clReleaseMemObject(a_mem_obj); ret = clReleaseMemObject(c_mem_obj); ret = clReleaseMemObject(b_mem_obj); ret = clReleaseCommandQueue(command_queue); ret = clReleaseContext(context); delete[] source_str; delete[] A; delete[] B; delete[] C; return 0; }
我尝试过的:
I wrote the code, but I don't understand at all what the flowchart should look like
解决方案1
创建 OpenCL 代码流程图涉及用步骤表示程序的逻辑流程。 请注意,OpenCL 编程通常涉及主机 (CPU) 和设备 (GPU) 代码流。 检查以下链接作为指南并尝试构建您的代码。
[^]Just a moment...
此外,您可以检查 ‘
OpenCL program flow
以下链接中的部分并相应地绘制步骤。OpenCL 编程示例[^]
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