AMD Cayman Architecture article online

Article: AMD's Cayman GPU Architecture
By: Ping-Che Chen (pcchen.delete@this.kimicat.com), December 16, 2010 2:39 am
Room: Moderated Discussions
Antti-Ville Tuunainen (avtuunainen@gmail.com) on 12/16/10 wrote:
---------------------------
>The problem is that with the current API's, there really is no use at all for a
>r/w cache for graphics. So there will be one if and only if the designers decide
>to sacrifice some graphics power for better GPGPU. Not holding my breath.

In addition to that, current GPGPU applications do not really need that much write cache, because many of these kernels are still streaming in nature. You can't save much bandwidth with a write cache if no thread is using any data written by another thread. Locally reusable data should always be managed with shared memory.

One important use of a write cache is global atomic operations. However, Cypress and Cayman have a separate GDS for that, and their global atomic operations are faster than Fermi AFAIK.

Of course, there are always certain situations where larger write caches can be very useful (histogram is probably one of them). But I think many of current GPGPU applications can get away without it.
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AMD Cayman Architecture article onlineDavid Kanter2010/12/15 07:39 AM
  AMD Cayman Architecture article onlineBryan Catanzaro2010/12/15 12:25 PM
  AMD Cayman Architecture article onlineCarsten Spille2010/12/15 02:51 PM
  AMD Cayman Architecture article onlineDaveC2010/12/15 05:17 PM
    AMD Cayman Architecture article onlineAntti-Ville Tuunainen2010/12/16 01:13 AM
      AMD Cayman Architecture article onlinePing-Che Chen2010/12/16 02:39 AM
        AMD Cayman Architecture article onlineEduardoS2010/12/16 01:54 PM
          AMD Cayman Architecture article onlineDavid Kanter2010/12/16 03:46 PM
            AMD Cayman Architecture article onlineEduardoS2010/12/16 06:03 PM
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        AMD Cayman Architecture article onlineRichard Cownie2010/12/17 09:22 AM
    AMD Cayman Architecture article onlineEduardoS2010/12/16 02:01 PM
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        AMD Cayman Architecture article onlineDavid Kanter2010/12/16 03:48 PM
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      Good pointTriskaine2010/12/17 01:02 PM
        Good pointDavid Kanter2010/12/17 04:45 PM
      Good pointJohn2010/12/20 08:05 PM
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      TexturesMoritz2010/12/21 01:41 AM
        TexturesGabriele Svelto2010/12/21 02:21 AM
        TexturesAntti-Ville Tuunainen2010/12/21 02:33 PM
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    TransposeMatt Sayler2010/12/23 07:58 PM
      Transpose/RotateMoritz2010/12/24 01:38 AM
        Transpose/RotateMatt Sayler2010/12/24 06:45 AM
          Transpose/RotateMoritz2010/12/25 05:33 AM
  control-data associated with scalarsMoritz2010/12/23 03:59 PM
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