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Altera_Forum
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8 years ago

Help with porting a CUDA code to OpenCL

Hi everyone. I am porting a CUDA kernel to OpenCL kernel to execute it on a FPGA (Stratix V). The code looks very similar so it shouldn't be a problem except that this FPGA board supports only O...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Ok so thanks everyone first. Now I am having a very weird problem. So basically I have converted the kernels to one sequential kernel. I have modified host code and done cross checking of code and so on. It does work. I do clean buffer before each iteration but for some reason after a certain number of iterations the kernel fails and it throws this error: CL_INVALID_COMMAND_QUEUE. So as far as I know this means the kernel has failed but it doesn't make any sense.

So in order to overcome this problem I re-initialize all the OpenCL variables (command queue, context and so on) once in a while after some iterations and now it goes through all the iterations.

I am running the code on my NVIDIA GPU. What could it be causing this problem? I do release the buffers and re-initialize them... Also if I run it on CPU it fails randomly..