How to calculate the time of code when use css3.3

There are several ways in which you can do this,

The easiest way is to use clock APIs from standard C library by including time.h. For eg you can download the DSPLIB to see reference implementation.

Other options are :

• In CCSv3.3, Under profile menu select Clock->enable. Then set break points in your code in the section that you want to benchmark and see the clock count.
• Read internal DSP count registers. See register defintiion in DSP megamodule documentation

Regards,

Rahul