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OpenCL kernel crashes with -5 Error

Question asked by gopal_hc on Aug 9, 2012
Latest reply on Aug 16, 2012 by Skysnake

I am developing OpenCL program using MultiGPU.

 

I have to launch very large number of threads. At a time i am launching only few threads for a kernel, based on number of resources(registers usage and local memory usage ) used to best utilize GPU resources. So i am launching my kernel total n times(n = N/M), where N is total number of threads that i have to launch, M is number of threads that i can be launched at a time and n is number of times needed to launch the kernel.

 

     Launching of kernel for few iterations goes successfully but it fails for more iterations. Kernel crashes with -5 Error when i am launching my kernel for more iterations.

 

  I am getting "CL_OUT_OF_RESOURCES" Error while while calling clEnqueueReadBuffer() function. It means that i am accessing GPU memory out of limit, but the same code is working fine for few iterations.

 

I am using Nvidia GPU device :: GeForce GTX 295

                Platform Version    ::  OpenCL 1.1

                Operating System  ::  Ubuntu 11.04

 

 

My Questions are ::

     What could be reasons the for error messages and crashes?

     What are the causes of getting "CL_OUT_OF_RESOURCES" Error?

 

Waiting for your quick reply.

 

Thanks in advance.

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