FPGA(Opencl) code work well in emulator mode, but can't finish run on the FPGA

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Easiest solution is to put all of your code in one kernel, remove all the channels, and use local memory buffers instead.

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Now I have remove all the channels and use local memory buffers instead， the same as you say. But after I finish debug this version, I also want to try use channels, to see if use channels can increace performance. Is it necessary to do that I think?