OpenCL Optimization guide for celeron N2820

Hi,

I have celeron N2820 based NUC. 

I would like to to optimize my opencl programs for this SoC having Intel HD graphics. 

Can some one point me to a guide or other resources for :

1- A block diagram of this SoC 

2- OpenCL optimization guide for this SoC, or at least closes matching SoC