hi3559 opencv gpu加速

目的：测试canny算子有无GPU情况下的性能

问题：程序卡死在opencv调用opencl加速的地方

硬件：Hi3559a官方开发板
软件：Hi3559AV100_SDK_V2.0.3.1

操作步骤：

1.移植最新的opencv4.5.1（跑过很多其他测试程序了，移植没得什么大问题，打开了了opencl的宏的）
2.编译GPU的内核驱动,最终我的加载驱动的脚本为如下：

    insmod hi_osal.ko anony=1 mmz_allocator=hisi mmz=anonymous,0,$mmz_start,$mmz_size:window,0,0x100100000,7M || report_error
    insmod hi3559av100_base.ko
    insmod hi3559av100_sys.ko
    insmod hifb.ko video="hifb:vram0_size:32400,vram1_size:16200,vram2_size:256"     # default fb0:4k,fb1:1080p,fb2:256x256
    insmod hi_dbe.ko
    insmod mali_kbase.ko

加载过程无报错。

3.添加gpu应用层驱动到LD_LIBRARY_PATH
4.编写测试程序链接
编译无任何警告，最终测试程序如下：

#include <opencv2/opencv.hpp>
#include <iostream>
#include <opencv2/core.hpp>
#include <opencv2/core/ocl.hpp>

using namespace std;
using namespace cv;

void test_canny_opencl(void){
    ocl::setUseOpenCL(true);
    UMat src, bw, blur, edge;
    src = imread("girl.jpg").getUMat(ACCESS_RW);
    cvtColor(src, bw, COLOR_BGR2GRAY);
    GaussianBlur(bw, blur, Size(3, 3), 0);
    Canny(blur, edge, 50, 100, 3);
        //ocl::setUseOpenCL(false);
}

void test_canny_normal(void){
    Mat src, bw, blur, edge;
    src = imread("girl.jpg");
    cvtColor(src, bw, COLOR_BGR2GRAY);
    GaussianBlur(bw, blur, Size(3, 3), 0);
    Canny(blur, edge, 50, 100, 3);
}

int main()
{
    double start,duration;
    start = static_cast<double>(getTickCount());
    test_canny_normal();
    duration = ((double)getTickCount() - start) / getTickFrequency();
    cout << "test_canny_normal cost time is: " << duration * 1000 << "ms" << endl;

    start = static_cast<double>(getTickCount());
    test_canny_opencl();
    duration = ((double)getTickCount() - start) / getTickFrequency();
    cout << "test_canny_opencl cost time is: " << duration * 1000 << "ms" << endl;

    return 0;
}

执行时卡死在 canny_opencl_test的cvtColor函数，发出如下警告信息：
getCacheDirectory Using world accessible cache directory. This may be not secure: /var/tmp/