how to get milli-second

[Gary Yu]

Hi all,

Could anybody point to me what is the command to get system time upto milli-second, "date" can only go as deep as second, I need to do some more precise calculation based on time stamp I can get.

thanks,
Gary

[Todd McDaniel_1]

I am pretty sure there is no MS parm for the DATE command...

There may well be a script that can calculate it based on the system time.

Of course, I reserve the right to be totally misinformed.

[Vijaya Kumar_3]

I really dont know to find the date in ms.

here is a thread that does with oracle: check it out:
http://forums1.itrc.hp.com/service/forums/parseCurl.do?CURL=%2Fcm%2FQuestionAnswer%2F1%2C%2C0x464e7b8d1de3d5118ff40090279cd0f9%2C00.html&admit=716493758+1067274938940+28353475

Thanks

[A. Clay Stephenson · Accepted solution]

If you want to do this, you are going to have to write a bit of C using the gettimeofday() function. Man gettimeofday for details. Now for the bad news, it is pretty much looney tunes to attempt millisecond resolution using a command called outside a given process. The overhead of fork()'ing and exec()'ing the new process will completely mask any millisecond resolution that you are trying to capture. You really have to build the metrics into your application.

[Paddy_1]

Use this Java code to yield systtime you want


public class TimeZoneClock {
public static void main(String[] args) {
long nowMillis = System.currentTimeMillis();
System.out.println("current time in milliseconds: " + nowMillis);

Calendar cal = Calendar.getInstance();
System.out.println("Default TimeZone: " + cal.getTimeZone().getDisplayName() + " - " + cal.getTimeZone().getID());
System.out.println();

cal.setTime(new Date(nowMillis));
System.out.println("default TimeZone: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();

cal.setTimeZone(TimeZone.getTimeZone("America/Los_Angeles"));
System.out.println("America/Los_Angeles: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();

cal.setTimeZone(TimeZone.getTimeZone("America/Phoenix"));
System.out.println("America/Phoenix: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();

cal.setTimeZone(TimeZone.getTimeZone("America/Denver"));
System.out.println("America/Denver: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();

cal.setTimeZone(TimeZone.getTimeZone("America/Chicago"));
System.out.println("America/Chicago: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();

cal.setTimeZone(TimeZone.getTimeZone("America/New_York"));
System.out.println("America/New_York: " + cal.get(Calendar.HOUR_OF_DAY) + ":" + cal.get(Calendar.MINUTE) + ":" + cal.get(Calendar.SECOND));
System.out.println();
}
}

[Paddy_1]

Forgot to add the headers :
------------------------
import java.util.Calendar;
import java.util.Date;
import java.util.TimeZone;
--------------------------

[Hemanth Gurunath Basrur]

Hello Gary,

Refer to the foll. links for info.

http://www.maths.lth.se/help/R/.R/library/R.lang/html/System.currentTimeMillis.html

http://www.mvps.org/directx/articles/selecting_timer_functions.htm

http://docs.hp.com/cgi-bin/fsearch/framedisplay?top=/hpux/onlinedocs/J2771-90010/J2771-90010_top.html&con=/hpux/onlinedocs/J2771-90010/00/00/73-con.html&toc=/hpux/onlinedocs/J2771-90010/00/00/73-toc.html&searchterms=time%7cin%7cmilliseconds%7csystem&queryid=20031027-103032

HTH.

Regards,
Hemanth

[Gary Yu]

thank you guys for the reply!

As Clay pointed out, either C of java, the overhead of forking process does count, so I may do it through pure programming language instead of scripts.

thanks,
Gary