[Boost-bugs] [Boost C++ Libraries] #12248: boost::log::attributes:timer accuracy shift

Subject: [Boost-bugs] [Boost C++ Libraries] #12248: boost::log::attributes:timer accuracy shift
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-06-02 15:35:15

#12248: boost::log::attributes:timer accuracy shift
------------------------------+---------------------
 Reporter:  tib               |      Owner:  andysem
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  log
  Version:  Boost 1.61.0      |   Severity:  Problem
 Keywords:  log timer         |
------------------------------+---------------------
 In the attached example, I have a timer and a clock attached to the log
 events. In the formatting function, I compute an estimated time value
 based on the timer and the timer creation datetime.
 I then compare that estimated time and the clock of the log event. It
 looks like there is a increasing shift (~25ms for 1 seconds of constant
 logging).
 In the example I wrote a timer that doesn't show this behavior and stays
 synchronized with the clock.

 Output example:
 {{{
 clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765871
 diff1: 24ms timer2: 2016-06-02T11:31:39.790219 diff2: 0ms
 clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765889
 diff1: 24ms timer2: 2016-06-02T11:31:39.790238 diff2: 0ms
 clock: 2016-06-02T11:31:39.790105 timer1: 2016-06-02T11:31:39.765907
 diff1: 24ms timer2: 2016-06-02T11:31:39.790257 diff2: 0ms
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12248>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.