program fails for array 30 x 30

Question

This is program for matrix multiplication on CUDA architecture. This code is working fine when size of array is 30 x 30 but giving output as a series of 0\'s when size is greate

Answer 1

You are invoking the kernel with a configuration of 1 grid with size 30x30:

matrix_multiply<<<1, SIZE * SIZE>>>(c_input1,c_input2,c_result,SIZE);

There are not enough threads to process more.