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<div dir="auto">I am using CentOS 6, kernel 3.10 from elrepo.org
kernels (3.10.102-1.el6.elrepo.x86_64).<br>
Asterisk version is 11.21.2 and Asterisk 13.X.X (I can't get it's
version now).<br>
<br>
Is it possible that your network switches' interfaces which are
connected to Hyper-V Server are 100% busy?<br>
It is possible that my installation works well because my Hyper-V
server is not high-load server so it has plenty free CPU, Disk,
Memory, Network resources to give them to Asterisk VM.<br>
<br>
Kseniya, could you try to reserve 100% of virtual CPUs for
Asterisk VM (just to test this configuration)?<br>
<br>
<br>
I am sorry I don't have free hardware and time to test your Ubuntu
16, asterisk 13.1, kernel 4.4.0-104 configuration(<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On 18 Dec 2017 12:09 p.m., "Kseniya
Blashchuk" <<a href="mailto:ksyblast@gmail.com">ksyblast@gmail.com</a>>
wrote:<br type="attribution">
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Dmitry, are you using CentOS? What kernel
version are you using? I will try with the same to see if it
can be also a kernel-related issue.</div>
<br>
<div class="gmail_quote">
<div dir="ltr">пн, 18 дек. 2017 г. в 11:35, Kseniya
Blashchuk <<a href="mailto:ksyblast@gmail.com"
target="_blank">ksyblast@gmail.com</a>>:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Thank you for a quick answer, Dmitry!
<div><br>
</div>
<div>We have tried the settings you suggested but
nothing helped. The machine is running 4.4.0-104
kernel, 4 cores, Intel(R) Xeon(R) CPU E5-2620 v3 @
2.40GHz, clocksource is hyperv_clocksource_tsc_<wbr>page,
timing module is res_timing_timerfd.so. We have also
tried to set 50% Reserve - no luck :(. </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">пн, 18 дек. 2017 г. в 10:49, Dmitriy
Ermakov <<a href="mailto:demonihin@gmail.com"
target="_blank">demonihin@gmail.com</a>>:<br>
</div>
</div>
<div class="gmail_quote">
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<p>Hi, Kseniya!</p>
<p>I have three installations of Asterisk (as
FreePBX but I think it is not important). They
work fine.</p>
<p>I have made some settings in Asterisk and
Hyper-V:</p>
<p>Asterisk: timing interface - timerfd.</p>
<p>Hyper-V:</p>
<ol>
<li>Virtual Machine => Network Adapter =>
Hardware Acceleration => Virtual Machine
Queue - Disable it;</li>
<li>Virtual Machine => Processor => Virtual
Machine Reserve (percentage) - set at least 25%
(if you have 4 virtual cores for your Asterisk).
You can try to set reserve more or less then 25%
- test it and, please, send email here;</li>
<li>Virtual Machine => Integration Services
=> Time synchronisation - enable it.<br>
</li>
</ol>
<p> This settings helped me.</p>
<p>Also check your Linux Kernel version - it must be
3.10 or newer. I saw very bad "timing test"
results on kernel 2.6.32.<br>
</p>
</div>
<div text="#000000" bgcolor="#FFFFFF"> <br>
<div
class="m_1043956196575610213m_8749962311671695405m_-6849995180857981132moz-cite-prefix">On
12/18/2017 10:26 AM, Kseniya Blashchuk wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi all!
<div>Does anybody have experience with asterisk
on Hyper-V? My test setup with Ubuntu 16 and
asterisk 13.1 (ubuntu repo) shows sound
distortion. I have analyzed the RTP flow with
wireshark and I see high skew and delta values
when the traffic leaves the hypervisor,
however everything is okay when a capture is
taken from a VM itself. I have read that there
can be timing problems with Hyper-V. I have
tried to disable time sync with the machine
and tried different clocksources. I have also
tried to change asterisk timing interface to
dahdi (dummy) - nothing helped so far. Hyper-V
version is 12p2.</div>
<div>Does anybody have a working setup with
Hyper-V?</div>
<div><br>
</div>
</div>
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<pre class="m_1043956196575610213m_8749962311671695405m_-6849995180857981132moz-signature" cols="72">--
С уважением, Дмитрий Ермаков</pre>
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Check out the new Asterisk community forum at: <a
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target="_blank">https://community.asterisk.<wbr>org/</a><br>
<br>
New to Asterisk? Start here:<br>
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href="https://wiki.asterisk.org/wiki/display/AST/Getting+Started"
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