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Defining device variables

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• Initial GPU machine state
  • The initial state of the GPU computer is:

    The computer statements (instructions) from (ordinary) C-functions are stored in RAM The variables used by the (ordinary) C-functions are stored in RAM The computer statements (instructions) from GPU C-functions are stored in the device memory There are no variables in the device memory !!!

    Graphically:

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• Creating device variables
  • Creating GPU program variables for GPU functions:

    GPU program variables are created by using the following (ordinary) C function in the CUDA library: cudaMalloc( &ptr, #bytes ) The