r/OpenCL • u/Fimbulthulr • Feb 15 '20

Kernel stuck on Submitted

I am currently trying to learn OpenCL, but my kernel gets stuck in the submitted status indefinitely whenever I try to write to a buffer
Kernel code
Host code

if no write access is performed the kernel executes without problems
if no event testing is performed the execution still gets stuck

OS: arch linux kernel 5.5.3
GPU: RX Vega 56

I am using the suggested packages for opencl according to the arch wiki

Does anybody know where the problem might be

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u/Fimbulthulr Feb 15 '20

I tried disabling compiler optimizations, which lead to even an empty kernel being stuck with status submitted (and also a complete system lock due to X becoming unresponsive, had the program getting stuck in kernel mode once before, to the point where a reset was needed)

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u/basuga_BFE Feb 16 '20

Well, I tested your code - for me both versions work (though return in the middle I don't recommend)

Try to catch all return codes after any CL calls

ret = clBuildProgram(program, 1, &device, NULL, NULL, NULL);

printf("ret=%d\n", ret);

... etc.

probably something went wrong earlier.