How to determine how long your program take?

Hi, guys! I got a problem. I had written a program in C51, but i don't know to calculate the time taken for this whole program. Is there any way to calculate my program ? Thank you!!!
How to determine how long your program take?

Hi, guys! I got a problem. I had written a program in C51, but i don't know to calculate the time taken for this whole program. Is there any way to calculate my program ? Thank you!!!
how can i know how long does the code take?

keil only display the sum of time.
How to use TCP_TYPE_KEEP_ALIVE or how to hold TCP connection?

I am writing simple program to control device through TCP port. Program was working but connection close automatically after time out. To hold the connection I try to use TCP_TYPE_KEEP_ALIVE flag, but...
how can i know how long does the code take?

keil only display the sum of time.