problem about multiple-gpu-Collection of common programming errors

• 
  Vladimir
  opencl multiple-gpu
  Right now I programmed made several algorithms running in parallel on one GPU, but all of them have the same problem, when I try to execute them on several GPUs (for example, 3). The problem is that the code, executed on one GPU executes exactly the same amount of time on 3 GPUs (not faster). I tried to execute with more data, tried different tasks to be executed, nothing helped. Finally, I ended up trying to run the easiest task like elements sum and still got this awful mistake. That is why I

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