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cmuratori's profile
Casey Muratori
Casey Muratori
Casey Muratori
@cmuratori

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Casey Muratori

@cmuratori

I'm worried that the baby thinks people can't change.

Seattle
caseymuratori.com
Joined March 2009

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    1. Fabian Giesen‏ @rygorous 18 Oct 2013
      Replying to @rygorous

      @rygorous Always global is already awkward; but (for me anyway) anything internally multi-pass ends up with arrays like "buf1", "buf2" etc.

      2 replies 0 retweets 0 likes
    2. Fabian Giesen‏ @rygorous 18 Oct 2013
      Replying to @rygorous

      @rygorous The first time I ran into this (2 years ago) I thought it was only that one shader, but no, I've seen it 4 more times since then.

      1 reply 0 retweets 0 likes
    3. Casey Muratori‏ @cmuratori 18 Oct 2013
      Replying to @rygorous

      @rygorous I've been having compute shader woes with stuff like this and so I was going to try some CUDA to see what the difference was...

      1 reply 0 retweets 0 likes
    4. Fabian Giesen‏ @rygorous 18 Oct 2013
      Replying to @cmuratori

      @cmuratori No idea about CUDA, I never used it. (Thinking about it, I think the last time I had an NVidia card was a Geforce *1*).

      1 reply 0 retweets 0 likes
    5. Casey Muratori‏ @cmuratori 18 Oct 2013
      Replying to @rygorous

      @rygorous I just want to get some sort of baseline for what's going on. I feel like compute shaders are sometimes very slow for no reason.

      2 replies 0 retweets 0 likes
    6. Casey Muratori‏ @cmuratori 18 Oct 2013
      Replying to @cmuratori

      @rygorous Like maybe the compiler did something stupid, and there's no way for me to help it, or I just can't figure out how to tell it.

      2 replies 0 retweets 0 likes
    7. Fabian Giesen‏ @rygorous 18 Oct 2013
      Replying to @cmuratori

      @cmuratori CS perf takes a very steep nosedive once the number of warps/wavefronts on a single compute unit goes below a certain number.

      1 reply 0 retweets 0 likes
    8. Fabian Giesen‏ @rygorous 18 Oct 2013
      Replying to @rygorous

      @cmuratori Which happens when you have too many live regs, use too much shared mem, or have too few instances running.

      1 reply 0 retweets 0 likes
    9. Casey Muratori‏ @cmuratori 18 Oct 2013
      Replying to @rygorous

      @rygorous Guessing, I'd suspect it was the "too much shared mem", because I think I still don't really understand how to mark it properly.

      1 reply 0 retweets 0 likes
    10. Casey Muratori‏ @cmuratori 18 Oct 2013
      Replying to @cmuratori

      @rygorous The OpenGL specs are... well they are certainly INTERESTING, shall we say, as to what they do and do not choose to mention where.

      1 reply 0 retweets 0 likes
      Casey Muratori‏ @cmuratori 18 Oct 2013

      @rygorous Once I have more experience with it I'm sure it won't be a problem, but at the outset it's a bit maddening...

      5:12 PM - 18 Oct 2013
      1 reply 0 retweets 0 likes
        1. Casey Muratori‏ @cmuratori 18 Oct 2013
          Replying to @cmuratori

          @rygorous ... since I know what I'm trying to get the thing to do but I don't know exactly how to tell it to do it ;P

          0 replies 0 retweets 0 likes
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