linux时间相关函数

kernel

#include <linux/ktime.h>

ktime_t calltime, delta, rettime;
unsigned long long duration;

calltime = ktime_get();
YOUR FUN HERE
rettime = ktime_get();
delta = ktime_sub(rettime,calltime);
duration = (unsigned long long)ktime_to_ms(delta);

user

int time1;
int time2;
struct tm *p;


struct timeval tv;
struct timezone tz;


gettimeofday(&tv,&tz);

p = localtime(&tv.tv_sec);
printf("time is : %d:%d:%d:%d\r\n",p->tm_hour,p->tm_min,p->tm_sec,tv.tv_usec/1000);

time1 = tv.tv_usec/1000;
YOUR FUN HERE
gettimeofday(&tv,&tz);
time2 = tv.tv_usec/1000;