# How to measure code execution time?

I have a pretty elementary question (I'm an intern - it happens!). My boss asked me to run a timer to measure how long it takes to execute some code on a Motorola 32-bit Microcontroller. I am using Metrowerks Codewarrior. Is there a built in tool in Codewarrior that can accomplish this? If there isn't, or you don't have experience using CodeWarrior, then is there a coding technique or tool that I must/can use? Any help would be greatly appreciated!

Fissyx

• I don't know about code warrior. But no need of using its library.. Start a timer at the starting of a particular routine.. Stop it at the end of the routine and take the time.
• Take the system time at the begining of the function.
Do a simple multiplication. Execute it for one lakh times (or larger depending upon your requirment) in a for loop. After executing the for loop, take system time again. find the difference. Divide it with one lakh. you will get the time taken for one multiplication.
• : Take the system time at the begining of the function.
: Do a simple multiplication. Execute it for one lakh times (or larger depending upon your requirment) in a for loop. After executing the for loop, take system time again. find the difference. Divide it with one lakh. you will get the time taken for one multiplication.
:

If you are working in unix platform then there are functions " ctime(), gmtime() and localtime()", which will return you unsigned long decimal vvalue since Jan 1 1970. capture the starting and ending
value and then subtract (closing time -opening time) this will give you the exact time in SECONDS, your program is executed.

If you needs pression then you can also have a function which will return the value in nano-seconds. ...
BUT you have to google for that.....I saw that function and about to use it, however, i need not have to go for such fine value, so i skip it. BUt it is definite that there is a fun with return the value in nano seconds....

See you.

With Regards...
Sumit Shah.

• : : Take the system time at the begining of the function.
: : Do a simple multiplication. Execute it for one lakh times (or larger depending upon your requirment) in a for loop. After executing the for loop, take system time again. find the difference. Divide it with one lakh. you will get the time taken for one multiplication.
: :
:
:
:
: If you are working in unix platform then there are functions " ctime(), gmtime() and localtime()", which will return you unsigned long decimal vvalue since Jan 1 1970. capture the starting and ending
: value and then subtract (closing time -opening time) this will give you the exact time in SECONDS, your program is executed.
:
: If you needs pression then you can also have a function which will return the value in nano-seconds. ...
: BUT you have to google for that.....I saw that function and about to use it, however, i need not have to go for such fine value, so i skip it. BUt it is definite that there is a fun with return the value in nano seconds....
:
: See you.
:
: With Regards...
: Sumit Shah.
:
:

How happy the original poster will be, receiving a reply only a year after posting... Always check the date before you reply.
http://www.8052.com/tuttimer.phtml#Initializing
Thanks

: : : Take the system time at the begining of the function.
: : : Do a simple multiplication. Execute it for one lakh times (or larger depending upon your requirment) in a for loop. After executing the for loop, take system time again. find the difference. Divide it with one lakh. you will get the time taken for one multiplication.
: : :
: :
: :
: :
: : If you are working in unix platform then there are functions " ctime(), gmtime() and localtime()", which will return you unsigned long decimal vvalue since Jan 1 1970. capture the starting and ending
: : value and then subtract (closing time -opening time) this will give you the exact time in SECONDS, your program is executed.
: :
: : If you needs pression then you can also have a function which will return the value in nano-seconds. ...
: : BUT you have to google for that.....I saw that function and about to use it, however, i need not have to go for such fine value, so i skip it. BUt it is definite that there is a fun with return the value in nano seconds....
: :
: : See you.
: :
: : With Regards...
: : Sumit Shah.
: :
: :
:
:
: How happy the original poster will be, receiving a reply only a year after posting... Always check the date before you reply.
: