Is it possible to write to output randomly?

Accelerated Computing CUDA CUDA Programming and Performance
1

I have defined a struct

typedef struct ElementRec {
float a,b,c,d,e,f,g,h;
} Element;

My first problem is whether CUDA support types like Element.

Second problem is that, if it does, can i write to output randomly, that is, the destination of output is decided in the runtime ?
like

output[idx mod 8 ].a = input[idx].a
output[idx mod 8 + 1].b = input[idx].b
output[idx mod 8 + 2].c = input[idx].c
output[idx mod 8 + 3].d = input[idx].e
…
output[idx mod 8 + 7].h = input[idx].h

Thanks

2

Yes.

Yes.

3

yes, this kind of operation is called ‘scatter’ and is one of the common reasons to use CUDA in the first place

4

However, you might wish to reconsider the layout of your data structures to get good bandwidth. If memory accesses are not coalesced, it is common to get 10x lower bandwidth. I observed up to 100x deterioration in memory accesses with large stride.