Perbaiki diagram blok program opencl dan mungkin program itu sendiri

Buat program menggunakan OpenCL dan menggunakan memori lokal. Tugas: b=min(A+C)

Saya memiliki diagram blok yang sudah jadi, tetapi guru mengatakan bahwa diagram tersebut menunjukkan semuanya secara berurutan, dan kami memiliki program paralel dan saya tidak tahu cara memperbaiki diagram blok.

Saya juga ingin tahu apakah saya telah menulis program menggunakan memori lokal dengan benar atau tidak.

Tautan ke gambar dengan diagram blok: https://www.imghippo.com/i/1704956923.jpg

#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 64

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);

    size_t local_item_size = 64;
    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);
    ret = clSetKernelArg(kernel, 3, local_item_size * sizeof(int), NULL);

    size_t global_item_size = LIST_SIZE;
    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;
}

kernel.cl:

__kernel void krn(__global const int* A, __global const int* C, __global int* B) {
    int i = get_global_id(0); 
    __local int localA[128];
    __local int localC[128];
    localA[i] = A[i];
    localC[i] = C[i];
    barrier(CLK_LOCAL_MEM_FENCE);
    B[i] = localA[i] + localC[i];
}

Apa yang saya coba:

Membuat diagram blok yang salah dan menulis sebuah program