boilerplate code for timing

Accelerated Computing CUDA CUDA Programming and Performance
1

I am trying to implement some timing boilerplate codes to compare the timing for using a tree sum versus using just a loop serial sum on my GPU. Can anyone help me find the boilerplate code to time how long it takes to launch a GPU kernel and return its results?

2

Use cuda events and create an event before and after the kernel launch using cudaEventRecord, synchronize to it using cudaEventSynchronize, then take the time delta using cudaEventElapsedTime.

3 
http://docs.nvidia.com/cuda/cuda-c-programming-guide/#events