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Altera_Forum
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8 years ago

Different Kernel Executions times

Hi! I'm getting a strange thing when executing a kernel multiples times (inside a loop). The first execution always take a long time compared to the others.. Example: Number of calls: 10...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Try moving clSetKernelArg and checkError outside of the timing region and only time clEnqueueTask and clFinish.

You can also use OpenCL's built-in profiler that allows you to accurately measure kernel execution time, and see if you would still see any variance in the run time.