The best tool we have is actually running freeswitch on it to see.<br><br><br><div class="gmail_quote">On Wed, Mar 10, 2010 at 1:27 PM, Peder <span dir="ltr">&lt;<a href="mailto:peder@networkoblivion.com">peder@networkoblivion.com</a>&gt;</span> wrote:<br>
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Is there a way to tell how accurate the timing is on a box
before running FreeSWITCH on it?</span></p>

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<p class="MsoNormal"><b><span style="font-size: 10pt;">From:</span></b><span style="font-size: 10pt;"> <a href="mailto:freeswitch-users-bounces@lists.freeswitch.org" target="_blank">freeswitch-users-bounces@lists.freeswitch.org</a>
[mailto:<a href="mailto:freeswitch-users-bounces@lists.freeswitch.org" target="_blank">freeswitch-users-bounces@lists.freeswitch.org</a>] <b>On Behalf Of </b>Anthony
Minessale<br>
<b>Sent:</b> Wednesday, March 10, 2010 10:26 AM<br>
<b>To:</b> <a href="mailto:freeswitch-users@lists.freeswitch.org" target="_blank">freeswitch-users@lists.freeswitch.org</a><br>
<b>Subject:</b> Re: [Freeswitch-users] Kernel timer warning with CentOS 5.4</span></p>

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<p class="MsoNormal" style="margin-bottom: 12pt;">FS now tries to determine how
accurate the timing is by doing some tests with 1ms sleeps.<br>
Most 64 bit CentOS box I have seen can easily calibrate.<br>
If you are having that error alot but the calls still sound ok, it&#39;s safe to
ignore it.<br>
you can also start FS with -nocal to skip this test.<br>
<br>
Also make sure you do not have any other cpu-intensive application on your box
possibly competing for resources.<br>
<br>
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<p class="MsoNormal">On Wed, Mar 10, 2010 at 3:42 AM, Tihomir Culjaga &lt;<a href="mailto:tculjaga@gmail.com" target="_blank">tculjaga@gmail.com</a>&gt; wrote:</p>

<p class="MsoNormal">i have the same issue but on centos 4.8 ... on 5.4 doesn&#39;t
complain...<br>
<br>
what is this related to ?<br>
<span style="color: rgb(136, 136, 136);"><br>
T.</span></p>

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<p class="MsoNormal">On Mon, Mar 8, 2010 at 2:25 PM, Bruce Hopkins &lt;<a href="mailto:jbrucehopkins@gmail.com" target="_blank">jbrucehopkins@gmail.com</a>&gt;
wrote:</p>

<p class="MsoNormal">Hi Anthony,<br>
<br>
Many, many apologies to take so long to reply - I failed to notice your
response.  Sorry !<br>
<br>
It seems to be variable.  Most times (on CentOS 5.3) when I start FS it
tells me it is around 1995ms.  Occasionally it is lower (sub 1000ms) and
then does not give a warning.<br>
<br>
Best wishes<br>
<span style="color: rgb(136, 136, 136);">Bruce</span></p>

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<p class="MsoNormal">On 1 March 2010 16:47, Anthony Minessale &lt;<a href="mailto:anthony.minessale@gmail.com" target="_blank">anthony.minessale@gmail.com</a>&gt;
wrote:</p>

<p class="MsoNormal" style="margin-bottom: 12pt;">we are still wary about 5.3 due
to bugs reported in libc.<br>
What number does it say it detected for the gap?<br>
<br>
</p>

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<p class="MsoNormal">On Sun, Feb 28, 2010 at 12:03 PM, Bruce Hopkins &lt;<a href="mailto:jbrucehopkins@gmail.com" target="_blank">jbrucehopkins@gmail.com</a>&gt;
wrote:</p>

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<p class="MsoNormal">OK - I&#39;ve realised I do get the same warning with CentOS
5.3, it just goes past more quickly so I didn&#39;t see it.  Maybe it is just
the hardware ....</p>

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<p class="MsoNormal">On 28 February 2010 15:37, Bruce Hopkins &lt;<a href="mailto:jbrucehopkins@gmail.com" target="_blank">jbrucehopkins@gmail.com</a>&gt;
wrote:</p>

<p class="MsoNormal">Hi,<br>
<br>
I wonder if anyone would be able to advise please:<br>
<br>
When I build FreeSWITCH on yum updated CentOS 5.4, I get a warning when I start
FreeSWITCH that <br>
<br>
&quot;Abnormally large timer gap detected&quot;<br>
&quot;Do you have your kernel timer set to greater than 1kHz?  You may
experience audio problems&quot;.<br>
<br>
I get no such warning if I build on CentOS 5.3, and the test timings it
measures on starting FreeSWITCH do look lower.  All I was doing to upgrade
to Centos5.4 was a yum update on the 5.3 build.<br>
<br>
I guess the warning comes from here: <a href="http://fisheye.freeswitch.org/browse/%7Eraw,r=16409/FreeSWITCH/src/switch_time.c" target="_blank">http://fisheye.freeswitch.org/browse/~raw,r=16409/FreeSWITCH/src/switch_time.c</a><br>

<br>
This is all on pretty low spec hardware - a couple of different Dell optiplex
p4&#39;s I use for testing.<br>
<br>
Does anyone happen to know if I should just stick to Cent)S 5.3, or use 5.4 and
not worry about the warnings, or if there is something I can do to fix the
problem it is warning about.  Perhaps it is just that I shouldn&#39;t use such
crummy hardware?!<br>
<br>
Many thanks in advance<br>
<span style="color: rgb(136, 136, 136);">Bruce</span></p>

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<p class="MsoNormal" style="margin-bottom: 12pt;">_______________________________________________<br>
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<p class="MsoNormal"><br>
-- <br>
Anthony Minessale II<br>
<br>
FreeSWITCH <a href="http://www.freeswitch.org/" target="_blank">http://www.freeswitch.org/</a><br>
ClueCon <a href="http://www.cluecon.com/" target="_blank">http://www.cluecon.com/</a><br>
Twitter: <a href="http://twitter.com/FreeSWITCH_wire" target="_blank">http://twitter.com/FreeSWITCH_wire</a><br>
<br>
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GTALK/JABBER/<a href="mailto:PAYPAL%3Aanthony.minessale@gmail.com" target="_blank">PAYPAL:anthony.minessale@gmail.com</a><br>
IRC: <a href="http://irc.freenode.net" target="_blank">irc.freenode.net</a>
#freeswitch<br>
<br>
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pstn:+19193869900</p>

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_______________________________________________<br>
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<a href="http://www.freeswitch.org" target="_blank">http://www.freeswitch.org</a></p>

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_______________________________________________<br>
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</div>

<p class="MsoNormal" style="margin-bottom: 12pt;"><br>
_______________________________________________<br>
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</div>

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<br clear="all">
<br>
-- <br>
Anthony Minessale II<br>
<br>
FreeSWITCH <a href="http://www.freeswitch.org/" target="_blank">http://www.freeswitch.org/</a><br>
ClueCon <a href="http://www.cluecon.com/" target="_blank">http://www.cluecon.com/</a><br>
Twitter: <a href="http://twitter.com/FreeSWITCH_wire" target="_blank">http://twitter.com/FreeSWITCH_wire</a><br>
<br>
AIM: anthm<br>
<a href="mailto:MSN%3Aanthony_minessale@hotmail.com" target="_blank">MSN:anthony_minessale@hotmail.com</a><br>
GTALK/JABBER/<a href="mailto:PAYPAL%3Aanthony.minessale@gmail.com" target="_blank">PAYPAL:anthony.minessale@gmail.com</a><br>
IRC: <a href="http://irc.freenode.net" target="_blank">irc.freenode.net</a> #freeswitch<br>
<br>
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pstn:+19193869900</p>

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<br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Anthony Minessale II<br><br>FreeSWITCH <a href="http://www.freeswitch.org/">http://www.freeswitch.org/</a><br>ClueCon <a href="http://www.cluecon.com/">http://www.cluecon.com/</a><br>
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