Measuring code execution time on MPC5554

dranne — Wed, 03 Nov 2010 14:28:41 GMT

I want to measure the execution time of code on MPC5554. What is the most accurate method to do this. Any sample code would be highly appreciated.

Thanks

dranne

Re: Measuring code execution time on MPC5554

wg0z — Mon, 17 Jan 2011 06:07:59 GMT

given the absence of interrupts, a certainty that the time base is enabled, a certainty that the timebase is going to stay enabled, and an assumption that there is no overflow of TBL, or that in any case you know how to make sure TBU/TBL are read in a consistent manner:

read the time base registers at the start of the code block, perhaps into a U64 called start_time

execute the code block

read the time regbase registers agin, into a U64 called finish_time

actual code execution time = (finish_time - start-time) / system_clock_freq - overhead_time

overhead time is the time you lose if the code block is <nothing>

topic Measuring code execution time on MPC5554 in Other NXP Products

Measuring code execution time on MPC5554

Re: Measuring code execution time on MPC5554