estimate total pipeline latency for kernel

For a pipeline depth of P, a loop trip count of L, and an initiation interval of I, the execution time of the pipeline in clock cycles is:

P + (L - 1) * I

You can calculate the execution time of each block separately using this formula, and just add them up to get the total number of cycles. Dividing that by operating frequency will give you the total run time in seconds. Of course this does not take stalls from channel and global memory operations into account. It not easy to model such stalls.