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Moakap
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int gettimeofday(struct
timeval *tv, struct timezone *tz);
int settimeofday(const
struct timeval *tv , const struct timezone *tz);
 
struct timeval {
   
time_t      tv_sec;     /* seconds */
   
suseconds_t tv_usec;    /*
microseconds */
};
 
struct timezone {
   
int tz_minuteswest;     /* minutes
west of Greenwich
*/
    int
tz_dsttime;         /* type of DST
correction */
};
 
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       …
struct timeval
t_start,t_end;
   
long cost_time = 0;
 
//get start
time
gettimeofday(&t_start,
NULL);
printf("Start
time: %ld us", t_start.tv_usec);
 
//some
operation

 
//get end time
gettimeofday(&t_end,
NULL);
printf("End
time: %ld us", t_end.tv_usec);
 
//calculate
time slot
cost_time =
t_end.tv_usec - t_start.tv_usec;
printf("Cost
time: %ld us", cost_time);

 
Êä³ö£º
Start time:
438061 us
End time:
459867 us
Cost time:
21806 us


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