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Altera_Forum
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8 years ago

How to solve data dependency problem?

After I compiled my kernel,I got the report as following: Block2: II bottleneck due to data dependency on variable(s): value (kernels.cl:42) Largest critical path contributor(s): 64%: ...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Well, either way, your loop on "m" is unpipelineable the way it is. You should either merge the loops on "m" and "n" into one loop, or convert your kernel to NDRange with both "m" and "n" absorbed into the thread dimensions, and let the runtime scheduler handle the job of minimizing the pipeline stalls/bubbles.