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Type: Posts; User: guillona

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    OpenCL YouTube Training Videos

    Hi everyone,

    I have uploaded a couple YouTube training videos on OpenCL. I plan to upload another video by the weekend that covers GPU architecture.

    http://youtu.be/8D6yhpiQVVI...
  2. This is one of my major issues with OpenCL. I am...

    This is one of my major issues with OpenCL. I am currently working on a library and header files that will deal with this issue for you, by breaking OpenCL apart into discrete units of functionality...
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    Sticky: I just want to let you know that I have posted...

    I just want to let you know that I have posted another article regarding SPIR, and how it might fit with the standard overall. I have a few more articles to write on OpenCL 2.0 before I am finished...
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    Sticky: Hi. I have written some feedback for SPIR on my...

    Hi. I have written some feedback for SPIR on my blog. I have to admit that I do not have extensive experience working on a compiler, but I have addressed concerns that I have regarding...
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    Sticky: Hi everyone, I decided to provide detailed...

    Hi everyone, I decided to provide detailed feedback in the form of blog articles. You can read them here: https://blog.ajguillon.com/

    The first relevant blog is:...
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    Sticky: Hi everyone. Just a quick note that I have...

    Hi everyone.

    Just a quick note that I have read the OpenCL 2.0 specification and have made extensive notes to provide feedback. I am currently writing it up, and it will take me a week or so to...
  7. Re: OpenCL Spec: What Happens on Event/Command Failure

    Well, I don't know about your programs, but I cannot assume mine are so well-behaved.

    Consider a situation in which there are two completely independent event graphs, one is operating on memory A,...
  8. Re: OpenCL Spec: What Happens on Event/Command Failure

    Hi.

    The issue is from OpenCL 1.2 Section 5.9. The execution status can be an error code (must be negative), and the standard specifies:


    Later it specifies:



    Given these two pieces of...
  9. OpenCL Spec: What Happens on Event/Command Failure

    Hi,

    I am having a hard time understanding the specification right now. What is supposed to happen if an enqueued command fails? What function call reports the error? What happens if I use...
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    Re: Interpretation of CL_DEVICE_VENDOR_ID

    Consider independent processes that are attempting to load-balance in a multi-device configuration. There is no order of devices guaranteed so far as I know, so it is possible that multiple...
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    OpenCL Spec: release/retain errors

    The specification lists a few unusual possible errors (e.g. CL_OUT_OF_RESOURCES, CL_OUT_OF_HOST_MEMORY) for release/retain operations. I think that the specification should guarantee that these...
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    Interpretation of CL_DEVICE_VENDOR_ID

    I'd like to request clarification on the spec. I have posted to AMD's Stream SDK forums as well here: http://forums.amd.com/devforum/messagev ... did=145374

    What is the intended purpose of...
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    Global Barriers?

    Currently I'm writing an algorithm where I need a single (very quick) global barrier, and then processing can resume in parallel as it was... so basically I have a large amount of parallel work, then...
  14. Re: Possible Specification Ambiguity - Host Side Vector Types

    Thank you for your response.

    This is a rather dangerous omission on the part of the spec, and hopefully it can be corrected within the specification itself. The spec should say something about...
  15. Possible Specification Ambiguity - Host Side Vector Types

    Device-side vector types can be accessed like struct types. e.g. float2 T.x, T.y.

    However, the spec is silent (or I don't see where it is mentioned) on how this maps to the host-side types e.g....
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    Lack of double Support in C Types

    I have been reading the released OpenCL specification. I have noticed that double is a reserved type, but not supported by the draft specification. In particular, in section 6.1.4 it is listed as...
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