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Thread: Effective gain by using padding on workgroup size

  1. #1

    Effective gain by using padding on workgroup size

    Let's say I have several work groups with size 349. According to what I read, it's better to use a work group size of 2^n instead of for example those 349. Can I expect a considerable gain of performance by using this kind of approach introducing padding?

  2. #2
    Junior Member
    Join Date
    Mar 2010
    Posts
    22

    Re: Effective gain by using padding on workgroup size

    Theorically yes, because the size tends to be in proportion with the warp, more preciselly, the walf-warp. I recommend you to read the OpenCL Programming Guide, and the others related to learn about warps, coalesing and banks of memory.

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