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clEnqueueWriteBufferRect still does not work in Catalyst 15.7 when region width is not equal to src pitch

Question asked by timchist on Jul 30, 2015
Latest reply on Oct 27, 2015 by dipak

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This has already been reported earlier (https://community.amd.com/thread/169828) for Catalyst 14.12 and was marked as resolved as the sample code I posted no longer reproduces the problem in Catalyst 15.7. However, if I slightly modify the sample (specifically, make the source image width not multiple of 4), the code no longer works correctly. I'm attaching a new sample.

Interestingly, if the region width is not a multiple of 4, everything is working fine.

In other words:

copying 16x16 area from a 256x256 image - works well
copying 17x16 area from a 256x256 image - works well
copying 16x16 area from a 257x256 image - fails
copying 17x16 area from a 257x256 image - works well

As before, the error is reproducible on a HD 7970, but with a newer driver - Catalyst 15.7.

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opencl_copy_rect.cpp.zip2.1 KB

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dipak

Jul 31, 2015 3:53 AM

Hi Tim,

Thanks for reporting and providing the reproducible test-case. I'll check and get back to you.

Regards,

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dipak

Aug 10, 2015 2:42 AM

Just to update you. It seems that clEnqueueWriteBufferRect/clEnqueueReadBufferRect is still broken for Cayman card (HD 6950) [OpenCL in 15.7 driver still doesn't work]. I've reported that issue and the above observation to the concerned team. They are working on it. If I get any further update, I'll share with you.

Regards,

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timchist Sep 8, 2015 4:00 AM

Just a status update: this is still broken in Catalyst 15.8 beta.

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timchist Oct 13, 2015 6:41 PM

Just checked 15.9.1 and 15.10 betas: the problem still persists.

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jason @ timchist on Oct 16, 2015 9:06 PM

@dipak I know these threads are always giving you inflammatory responses but why is this still a thing?

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dipak

@ jason on Oct 27, 2015 4:28 PM

My apologies for this delayed reply.

Nothing like that. Rather I would like to thank you for keeping your patience.

Actually, right now, I don't have any satisfactory answer of your question. I know that clEnqueueWriteBufferRect issue is an old one and resurfaced many times. Last time when a similar bug got fixed, I doubt, few test-cases were skipped at the validation process. As a result, it still persists.

I'll try to get more information about the current status of the issue and share with you.

Regards,

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6 Replies

dipak Jul 31, 2015 3:53 AM
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Hi Tim,
Thanks for reporting and providing the reproducible test-case. I'll check and get back to you.

Regards,
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dipak Aug 10, 2015 2:42 AM
Mark Correct
Correct Answer
Just to update you. It seems that clEnqueueWriteBufferRect/clEnqueueReadBufferRect is still broken for Cayman card (HD 6950) [OpenCL in 15.7 driver still doesn't work]. I've reported that issue and the above observation to the concerned team. They are working on it. If I get any further update, I'll share with you.

Regards,
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timchist Sep 8, 2015 4:00 AM
Mark Correct
Correct Answer
Just a status update: this is still broken in Catalyst 15.8 beta.
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timchist Oct 13, 2015 6:41 PM
Mark Correct
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Just checked 15.9.1 and 15.10 betas: the problem still persists.
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- jason @ timchist on Oct 16, 2015 9:06 PM
  Mark Correct
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  @dipak I know these threads are always giving you inflammatory responses but why is this still a thing?
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  - dipak @ jason on Oct 27, 2015 4:28 PM
    Mark Correct
    Correct Answer
    My apologies for this delayed reply.
    
    Nothing like that. Rather I would like to thank you for keeping your patience.
    Actually, right now, I don't have any satisfactory answer of your question. I know that clEnqueueWriteBufferRect issue is an old one and resurfaced many times. Last time when a similar bug got fixed, I doubt, few test-cases were skipped at the validation process. As a result, it still persists.
    I'll try to get more information about the current status of the issue and share with you.
    
    Regards,
    Like • Show 0 Likes0
    Actions

clEnqueueWriteBufferRect still does not work in Catalyst 15.7 when region width is not equal to src pitch

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