In Linux, the system time (in milliseconds) and the computing program running time are used.

# Include <stdio. h>
# Include <sys/time. h>
# Include <time. h>

Struct timeval tvpre, tvafter;
Gettimeofday (& tvpre, null );
Sleep (3); // This is Linux programming. This sleep is in seconds.
Gettimeofday (& tvafter, null );
 
Ast_log (log_notice, "prepaid_staff_log: Test spend time is % d msecond./N", (tvafter. TV _sec-tvpre. TV _sec) * 1000 + (tvafter. TV _usec-tvpre. TV _usec)/1000 );

 

The output is 3002 milliseconds.

Here we need to know that the sleep function parameters in Linux are measured in seconds, while those in wimdows are measured in milliseconds.

Note that the sleep function in Linux is not accurate. Don't rely on it when you need to be very accurate.