<div dir="ltr">No problem, I will try to test with CentOS if I have time </div><br><div class="gmail_quote"><div dir="ltr">пн, 18 дек. 2017 г. в 13:33, Dmitriy Ermakov <<a href="mailto:demonihin@gmail.com">demonihin@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    <p>Ok. I am sorry, I don't have any more ideas(</p>
    <p>Please, send here email with your testing results.<br>
    </p></div><div text="#000000" bgcolor="#FFFFFF">
    <br>
    <div class="m_-7556216269321677894moz-cite-prefix">On 12/18/2017 01:22 PM, Kseniya
      Blashchuk wrote:<br>
    </div>
    <blockquote type="cite">
      <div dir="ltr">To be honest we are a bit afraid to set 100% )),
        but we have tried to set 90% - no luck. I have also tested with
        4.8 and 4.11 kernels - same results. I will try with Centos 6
        and kernel 3.10 to check if something changes. VSwitch shows
        1-2% load on the interfaces, and this host is not overloaded at
        all, so I don't think the VM has some lack of resources.</div>
      <br>
      <div class="gmail_quote">
        <div dir="ltr">пн, 18 дек. 2017 г. в 13:07, Dmitriy Ermakov <<a href="mailto:demonihin@gmail.com" target="_blank">demonihin@gmail.com</a>>:<br>
        </div>
        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div text="#000000" bgcolor="#FFFFFF">
            <div dir="auto">I am using CentOS 6, kernel 3.10 from <a href="http://elrepo.org" target="_blank">elrepo.org</a> 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>
          <div text="#000000" bgcolor="#FFFFFF">
            <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" target="_blank">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_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">
                        <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
                          <div text="#000000" bgcolor="#FFFFFF">
                            <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_-7556216269321677894m_5365412536976143162m_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>
                              <br>
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                              <br>
                            </blockquote>
                            <br>
                          </div>
                          <div text="#000000" bgcolor="#FFFFFF">
                            <pre class="m_-7556216269321677894m_5365412536976143162m_1043956196575610213m_8749962311671695405m_-6849995180857981132moz-signature" cols="72">-- 
С уважением, Дмитрий Ермаков</pre>
                          </div>
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          <br>
          New to Asterisk? Start here:<br>
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          <br>
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      </div>
      <br>
      <fieldset class="m_-7556216269321677894mimeAttachmentHeader"></fieldset>
      <br>
    </blockquote>
    <br>
    <pre class="m_-7556216269321677894moz-signature" cols="72">-- 
С уважением, Дмитрий Ермаков</pre>
  </div>

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<br>
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