AIX TIME CHANGE Post: 302488483

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Operating Systems AIX AIX TIME CHANGE Post 302488483 by m.d.ludwig on Monday 17th of January 2011 10:52:27 AM

01-17-2011

Registered User

sleep 1 will sleep for around one second. Given the vagaries of multiuser systems, clock timings, and cosmic rays (you can never tell) -- sleep might run for 0.9 seconds or 1.05 seconds. Add to that time the amount of time that date takes to run, and I can easily see seconds being skipped:

09:12:03.75 - date runs, prints 09:12:03
09:12:04.05 - sleep runs
09:12:05:06 - date runs, prints 09:12:05

I would expect even a simple C-program such as:

Code:

#include <stdio.h>
#include <time.h>

void main(int argc, char **argv) {
    while (1) {
        sleep(1);
        printf("%ld\n", time((void *) 0));
    }
}

to skip a second now and again, although a lot less frequently.

If you need accuracy, look at time(7).

m.d.ludwig

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LEARN ABOUT DEBIAN

netsds::util::datetime

NetSDS::Util::DateTime(3pm)				User Contributed Perl Documentation			       NetSDS::Util::DateTime(3pm)

NAME

       NetSDS::Util::DateTime - common date/time processing routines

SYNOPSIS

	       use NetSDS::Util::DateTime;

	       print "Current date: " . date_now();

DESCRIPTION

       This package provides set of routines for date and time processing.

EXPORTED FUNCTIONS

       date_now_array([TIME])
	   Returns array of date items for given date.	If source date is not set current date used.

       date_now([TIME])
	   Return [given] date as string.

	       2001-12-23 14:39:53

       date_now_iso8601([TIME])
	   Return date as ISO 8601 string.

	       20011223T14:39:53Z

	   <http://en.wikipedia.org/wiki/ISO_8601> http://www.w3.org/TR/NOTE-datetime <http://www.w3.org/TR/NOTE-datetime>

       date_strip(DATE)
	   Trim miliseconds from date.

       date_date(DATE)
	   Trim time part from date.

       date_time(DATE)
	   Trim date part from date.

       time_from_string($string)
	   Return parsed date/time structure.

       date_from_string($string)
	   Return date from string representation.

       date_inc([INCREMENT, [TIME]])
	   Return date incremented with given number of seconds.

       date_inc_string([INCREMENT, [TIME]])
	   Return string representation of date incremented with given number of seconds.

EXAMPLES

       None yet

BUGS

       Unknown yet

SEE ALSO

       Date::Parse, Date::Format

TODO

       Import stuff from Wono project

AUTHOR

       Valentyn Solomko <val@pere.org.ua>

       Michael Bochkaryov <misha@rattler.kiev.ua>

perl v5.12.4							    2011-08-27					       NetSDS::Util::DateTime(3pm)

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netsds::util::datetime