topic Kernel doesn't finish building on CPU in OpenCL* for CPU

Kernel doesn't finish building on CPU

Vishvas — Sat, 01 Aug 2020 09:00:43 GMT

The following kernel runs fine on my GPU (GTX 1060) and my iGPU on my i5-6500

But if I run this on my CPU, it doesn't go past the clBuildProgram function

I don't get any error, the clBuildProgram executes forever

__kernel void multiply(__global int* res, __global int* b, __global int* p, __global int* r, __global int* q, const int count, const int am, const int bn) { int l, j, k; int i = get_global_id(0); //printf("\n\n%d", i); { for(j = 0; j < am;) { l = 0; for (int k = 0; k < count; k++) { *(res + j * bn + i) += p[k] * *(b + r[k] * bn + i); if (k == (q[l + 1] - 1)) { j++; l++; } } } } }

I was able to recreate this error on a different PC as well

Why is this happening and how can I fix this?

Thank you

Re: Kernel doesn't finish building on CPU

Sergey_I_Intel1 — Fri, 07 Aug 2020 14:36:00 GMT

Hello,

Condition, in theory, can be triggered rarely, and it depends on "q", and what's there.

Can you send your host_code, where you run this kernel?

Best regards,

Sergey

Re: Kernel doesn't finish building on CPU

Vishvas — Sat, 08 Aug 2020 07:03:42 GMT

I've attached the host code

One thing I noticed is that if I uncomment the print statement in my kernel, then the code runs without any issues

The clBuildProgram function is in line 305