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OpenCL

maxdz8
Elite

Missing a nibble in last writes of debug output

I am testing a thing which needs a fairly high amount of bytes. For this reason, I'm writing some bytes to a debug output and dumping them to disk.

I've noticed however the last byte written (especially at the end of a kernel) will often get a missing nibble. The low nibble is typically correct but the high nibble is very often 0.

I have observed this in various forms and I'm very confused on the cause. Even more oddly, the very same data appears to be correct when fetched from a successive stage.

I'm using 14.12 Omega on Windows 7 x64 with a Radeon 7750.

Ever noticed a similar pattern?

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dipak
Staff
Staff

Re: Missing a nibble in last writes of debug output

Hi,

My apologies for this delay. Has your problem been resolved?

I asked some folks about this behavior, but they seemed unaware of such thing. If its a really driver/hardware bug, it would be great help if you can provide us a test-case that demonstrates the above problem.

Regards,

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maxdz8
Elite

Re: Missing a nibble in last writes of debug output

That project was put on hold (not because of this).

Odds are I might work on it again soon. I'll see what I can do but it appeared quite an heisenbug.

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dipak
Staff
Staff

Re: Missing a nibble in last writes of debug output

Okay.

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