long start_time = System.currentTimeMillis();
View.draw(canvas);
long end_time = System.currentTimeMillis();
long spend_time = end_time - start_time;
Log.i(TAG,"mView.draw: spend_time = " + spend_time);

#include <stdio.h>
#include <sys/time.h>
void main ()
{
  struct timeval time;
  gettimeofday(&time, NULL);
  printf ( "\007The current date/time is: %lld\n", time.tv_sec * 1000 + time.tv_usec /1000);
}

#include <linux/time.h>
#include <linux/rtc.h>
struct timespec time_start, time_end;
struct rtc_time tm_start, tm_end;
long time_nsec = 0;
getnstimeofday(&time_start);
rtc_time_to_tm(time_end.tv_sec, &tm_start);
printk(KERN_ERR "\n (%d-d-d d:d:d.%09lu UTC)\n",
tm_start.tm_year + 1900, tm_start.tm_mon + 1, tm_start.tm_mday,
tm_start.tm_hour, tm_start.tm_min, tm_start.tm_sec, time_start.tv_nsec);
.......
getnstimeofday(&time_end);
rtc_time_to_tm(time_end.tv_sec, &tm_end);
time_nsec = time_end.tv_nsec - time_start.tv_nsec;
printk(KERN_ERR "\n tid: %d, common: %s \n", current->pid, current->comm);
printk(KERN_ERR "\n end(%d-d-d d:d:d.%09lu UTC)\n",
tm_end.tm_year + 1900, tm_end.tm_mon + 1, tm_end.tm_mday,
tm_end.tm_hour, tm_end.tm_min, tm_end.tm_sec, time_end.tv_nsec);
printk(KERN_ERR "\n mdss_fb_commit_wq_handler end, time_nsec : %ld \n" , time_nsec);

import java.text.SimpleDateFormat;
SimpleDateFormat mFormat = new java.text.SimpleDateFormat("yyyy:MM:dd HH:mm:ss:SSS");
String time = mFormat.format(System.currentTimeMillis());

timeval tv;
gettimeofday(&tv, NULL);
int milli = tv.tv_usec / 1000;
char buffer [80];
strftime(buffer, 80, "%Y:%m:%d %H:%M:%S", localtime(&tv.tv_sec));
char currentTime[84] = "";
sprintf(currentTime, "%s.%d", buffer, milli);
ALOGD("time: %s \n", currentTime);