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Christoph9's avatar
Christoph9
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3 years ago

Non-Ordered Pipes for Random-Number-Generation

Hello, I currently am trying to fit a design onto the Arria10 FPGA that requires random-numbers at multiple locations in the code, sometimes in sub-sub-subroutines. First I tried to hand the sta...
BoonBengT_Altera's avatar
BoonBengT_Altera
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3 years ago

Hi @Christoph9,


Apologies for the delayed in response, trying to build the example your provided from my end with some minor hiccups in my end. Getting that solved and will get back with you on the result.


Just to confirm, there are 2 sets of example that you provided, are they the same?

And for the minimal/smaller example which error did not came out, which sets of example are they(first or second)?

Hope to hear from you soon.


Best Wishes

BB


  • Christoph9's avatar
    Christoph9
    Icon for New Contributor rankNew Contributor
    3 years ago

    Hello BB,

    yes the two examples are the same (although in the 2nd I put some files as attachement). I accidentally posted two because the first one didn't visible to me for 1 day or so. I could'nt remove the first one either, maybe you can?

    I did not attach any example where the error did'nt occur. If I remember correctly the error did not occur when the loop in the kernel looked like this:

    for (int s = 0; s < 10; s++)
                {
                    float u = float(i + sycl::ext::intel::pipe<rnd_out_pipe_id, float, 8>::read()) / float(3840);
                    float v = float(j + sycl::ext::intel::pipe<rnd_out_pipe_id, float, 8>::read()) / float(2160);
                }

    As soon as I add the cam.getRay function, the reads in the loop for u and v start to cause these warnings.

    Best regards,
    Christoph