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<tt>Hi </tt>Collin, Hi Vitalii,<br>
<br>
On long run, the OpenSIPS timer is not design to guarantee alignment
with the external time flow. The internal timer is design for
measuring timer delta intervals (rather than against the original
time).<br>
<br>
As the timer is looping on ~1 second, after 100000 seconds, that ~
accumulates and become significant. Not to mention that the timer
process is subject to the "realtime-ness" of the Linux kernel.<br>
<br>
May I ask way is this a problem ? Once again , the timer is design
for measuring internal delta-time intervals (usually seconds or
minutes), it does not want to be a replacement for a clock!<br>
<br>
Best regards,<br>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="http://www.opensips-solutions.com">http://www.opensips-solutions.com</a></pre>
<div class="moz-cite-prefix">On 07.08.2015 01:42, Colin Mason wrote:<br>
</div>
<blockquote
cite="mid:0D1C698866F66045A6201FD0F59CAC90020877FCEE@EX.frontier.local"
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<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
just implemented a timer route that was executing a bit late
every time on 1.11.1. Looks like the same issue. This is not
a virtual machine. I found this thread when googling. You
can see that there is a constant time skew. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">CentOS
6.5. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Linux
2.6.32-431.5.1.el6.x86_64 #1 SMP Wed Feb 12 00:41:43 UTC
2014 x86_64 x86_64 x86_64 GNU/Linux<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">opensipsctl
fifo uptime;opensipsctl fifo get_statistics timestamp<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Now::
Thu Aug 6 18:33:23 2015<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Up
since:: Thu Aug 6 18:18:57 2015<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Up
time:: 866 [sec]<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">core:timestamp
= 848<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Now::
Thu Aug 6 18:42:17 2015<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Up
since:: Thu Aug 6 18:18:57 2015<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Up
time:: 1400 [sec]<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">core:timestamp
= 1374<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Colin<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:users-bounces@lists.opensips.org">users-bounces@lists.opensips.org</a>
[<a class="moz-txt-link-freetext" href="mailto:users-bounces@lists.opensips.org">mailto:users-bounces@lists.opensips.org</a>] <b>On Behalf Of </b>Vitalii
Hurin<br>
<b>Sent:</b> Monday, July 06, 2015 8:35 AM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:users@lists.opensips.org">users@lists.opensips.org</a><br>
<b>Subject:</b> [OpenSIPS-Users] Issues with internal timer
ticks<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt">Greetings!<br>
<br>
I'm looking for someone who can help with understanding
the possible reasons of issue with internal timer ticks in
OpenSIPS 1.11.3 . So here is the problem: we are
developing custom call center and once I've noticed all
time-based values that are influenced by internal timer
(as it turned out, by function get_ticks() from timer.c)
were constantly getting behind actual system time. For
example, when I call such command sequence "opensipsctl
fifo uptime; opensipsctl fifo get_statistics timestamp", I
get this kind of output:<br>
<br>
Now:: Wed Jul 1 13:01:52 2015<br>
Up since:: Tue Jun 30 15:54:50 2015<br>
Up time:: 76020 [sec]<br>
core:timestamp:: 75098<br>
<br>
As you can see, for nearly one day we have 922 second and
I've got even about 3 hour difference for a couple of
days! I can't find certain rule of difference increase but
it's happening smoothly every time. After checking out
some production servers with an old version of our call
center based on OpenSIPS 1.8, I've found no similar issues
there and core:timestamp value is always equal to up time
despite server setups are almost identical. So please help
me with searching the reason in our system. Or can it be a
bug or something related to timer counting in OpenSIPS
1.11 core? Can't find anything about similar issues on
Google...<br>
<br>
Thanks in advance!<o:p></o:p></p>
</div>
<p class="MsoNormal">Vitalii.<o:p></o:p></p>
</div>
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