Archives Discussions

[domjoh]

Hi,

I'm trying to use the select built-in function in the following kernel :

__kernel void Kernel1(__global uchar4 *a,

                   __global uchar4 *b,

                   __global uchar4 *c,

                   __global uchar *seuil)

{

    int g_x = get_global_id(0);

    int g_y = get_global_id(1);

    int index = g_y*256 + g_x;

    c[index] = select((uchar4)0, (uchar4)1, (a[index] - b[index] > *seuil));

}

but it crashes my application down when running on my AMD GPUs with a meaning less error message (at least for me) when it works just fine on Intel CPU and Nvidia GPUs.

When I try to analyse the kernel code within CodeXL, it crashes at the first compilation attempt, exiting CodeXL with a "Segmentation fault" error.

Does any one have any idea of what the problem could be ?

Thank you.

[dipak]

Thanks for reporting this. Please provide the set-up details such as GPU, driver version, APP SDK etc. Please also attach the error message that you are getting during kernel compilation.

Regards,

[domjoh]

While trying to find out the set-up details, I've updated the drivers of my AMD GPUs and my CodeXL installations to the latest version and now it compiles fine on both of my AMD GPUs.

Thank you for your help, pointing me in the right direction.