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CUDA: In what memory space is an array of a fixed size stored?

When setting up a fixed-size array in the kernel, for example:

int my_array[100];

What memory space does the array end in?

In particular, I would like to know if such an array can be stored in a register file or shared memory on devices> = 2.0 and, if so, what requirements exist.

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2 answers

For Fermi (and possibly earlier architectures), the following conditions must be met to store an array in a register file:

  • The array is indexed only by constants
  • Registers available
  • Hopefully the compiler will also do some analysis to determine the effect on overall performance.

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