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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...
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Altera_Forum
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8 years ago

As I mentioned earlier:

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Note that global memory consistency is only guaranteed at the end of kernel execution and hence, if you try to share a read_write buffer between multiple queues, you will get undefined behavior, unless you synchronize the calls using events.

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So, yes, do not do this unless you are using events to synchronize kernel calls from the host.

Regarding the "note: candidate function has been explicitly made unavailable" message, Altera's Programming Guide says: 

The SDK does not support 64-bit atomic functions described in Section 9.7 of the OpenCL Specification version 1.0.

That is probably the source of your problem.