CUDA: Getting max value and its index in an array

Question

I have several blocks were each block executes on separate part of an integer array. As an example: block one from array[0] to array[9] and block two from array[10] to array

Answer 1

This will not benefit the original poster but for those who came to this page looking for an answer I would second the recommendation to use thrust that already has a function thrust::max_element that does exactly that - returns an index of the largest element. min_element and minmax_element functions are also provided. See thrust documentation for details here.