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<p style="margin: 0 0 1em 0; color: black;">Just to add my experience, I
have a windows server running as VM on a dedicated server hosted with iweb,
they call it smart server and I have been using freeswitch on it from a
long time now and everything works perfect audio wise so I guess this has
something to do with Linux and the kernel run by Amazon on their VM.</p>
<p style="margin: 0 0 1em 0; color: black;">Correct me if I'm wrong</p>
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<div style="color: black;">
<p
style="color: black; font-size: 10pt; font-family: Arial, sans-serif; margin: 10pt 0;">On
April 18, 2017 8:58:00 PM Anthony Minessale
<anthony.minessale@gmail.com> wrote:</p>
<blockquote type="cite" class="gmail_quote"
style="margin: 0 0 0 0.75ex; border-left: 1px solid #808080; padding-left: 0.75ex;">
<div>In general when a thread about performance or vm turns to lots of
theories. This is a science so we need facts to diagnose and its often not
possible once we get this far down the rabbit hole. To the contrary,
asking about timer test was a good
start!</div><div><br></div><div><br></div><div><br></div><div><br><div
class="gmail_quote"><div>On Tue, Apr 18, 2017 at 11:41 AM Michael Jerris
<<a href="mailto:mike@jerris.com">mike@jerris.com</a>>
wrote:<br></div><blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div
style="word-wrap:break-word">Superstition comment was in regards to tc
malloc, not you.<div><br><div><blockquote
type="cite"></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div>On Apr
18, 2017, at 7:35 AM, David Ponzone <<a
href="mailto:david.ponzone@gmail.com"
target="_blank">david.ponzone@gmail.com</a>> wrote:</div><br
class="m_-8579652609755085387Apple-interchange-newline"></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div>Anthony,</div><div><br></div>Could you
elaborate a little bit more on why I am being superstitious ?<div>Is
timer_test command obsolete ?</div><div>Or is it a way to emphase the fact
that you won’t support FS on VM, anyway
?</div><div><br></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div>Le 17
avr. 2017 à 23:27, Anthony Minessale <<a
href="mailto:anthony.minessale@gmail.com"
target="_blank">anthony.minessale@gmail.com</a>> a écrit :</div><br
class="m_-8579652609755085387Apple-interchange-newline"></blockquote></div></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div>I
believe we may be stumbling into superstition at this
point.<div><br></div></div></div></blockquote></div></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
class="gmail_extra"><div class="gmail_quote">On Fri, Apr 14, 2017 at 6:03
PM, David Ponzone <span><<a href="mailto:david.ponzone@gmail.com"
target="_blank">david.ponzone@gmail.com</a>></span>
wrote:<br></div></div></div></blockquote></div></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
class="gmail_extra"><div class="gmail_quote"><blockquote
class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div
style="word-wrap:break-word">Did you run the timer_test command
?</div></blockquote></div></div></div></blockquote></div></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
class="gmail_extra"><div class="gmail_quote"><blockquote
class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div
style="word-wrap:break-word"><div><div><div
class="m_-8579652609755085387h5"><div><blockquote type="cite"><div>Le 14
avr. 2017 à 23:04, Bilal Dar <<a href="mailto:bilal@rgate-systems.com"
target="_blank">bilal@rgate-systems.com</a>> a écrit :</div><br
class="m_-8579652609755085387m_7398230337600912797Apple-interchange-newline"><div><div>The
issue triggered when I ran out of inodes on the server, even after freeing
inodes things never went back to normal. I was running earlier m3.large
and now moved to m3.2xlarge servers, CPU/memory utilization is
negligible. <div><div><br></div><div><div>Model vCPU Mem (GiB)
SSD Storage (GB) </div><div>m3.large 2 7.5 1 x 32
</div><div>m3.2xlarge 8 30 2 x 80
</div></div><div><br></div><div><br></div><div
class="gmail_extra"><br><div class="gmail_quote">On Fri, Apr 14, 2017 at
1:53 PM, Colin Morelli <span><<a href="mailto:colin.morelli@gmail.com"
target="_blank">colin.morelli@gmail.com</a>></span>
wrote:<br><blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div>Robert,<div><br></div><div>While
I'd love to see VMs provide more stable ground for FS, it's simply
not the best task for a VM. Virtual machines scale well specifically
because you can overprovision them. It would not be nearly as
cost-effective to run VMs if each instance had a guaranteed dedicated slice
of hardware to operate on. While hypervisors are <i>very</i> good at task
prioritization, they're not perfect. If the hypervisor can't
schedule processor time when FS needs it because the CPU cores are
momentarily taken on other tasks, there's not a whole lot FS can do.
This is not an issue with just FS, but with all real-time applications. In
most apps, even large clock skews and bad hypervisors schedulers can go
completely unnoticed. If there's consistent 5-10ms every time you click
to load a web page, you'd probably have no idea. If there's 5-10ms
jitter every time you try to read 20ms of audio, you have <i>really
bad</i> audio. Granted most skews are not that bad, but the effects are
pronounced when you're dealing with data that's real-time in
nature.</div><div><br></div><div>Bilal,</div><div><br></div><div>I have no
idea what AMI you're running, but a very rough "ear test" has
made me fairly confident that I can get better performance running
AmazonLinux AMIs over Ubuntu (and probably many others). It wouldn't
surprise me if AmazonLinux builds a custom kernel that has been tuned to
run better on AWS hardware. I'd say it's at least worth a quick
experiment.</div><div><br></div><div>Best,</div><div>Colin</div></div><div
class="gmail_extra"><br><div class="gmail_quote"><div><div
class="m_-8579652609755085387m_7398230337600912797gmail-h5">On Fri, Apr 14,
2017 at 4:34 PM, Mundkowsky, Robert <span><<a
href="mailto:rmundkowsky@ets.org"
target="_blank">rmundkowsky@ets.org</a>></span>
wrote:<br></div></div><blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><div><div
class="m_-8579652609755085387m_7398230337600912797gmail-h5">
<div lang="EN-US">
<div
class="m_-8579652609755085387m_7398230337600912797gmail-m_-470338840461164024m_-5335504817902696112WordSection1"><p
class="MsoNormal"><a
name="m_-8579652609755085387_m_7398230337600912797_m_-470338840461164024_m_-5335504817902696112__MailEndCompose"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">Michael<u></u><u></u></span></a></p><p
class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p
class="MsoNormal" style="text-indent:0.5in"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">Just
curious, why so many problems with VMs?<u></u><u></u></span></p><p
class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p
class="MsoNormal" style="text-indent:0.5in"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">I
would think most applications need real time clocks that provide consistent
valid data?<u></u><u></u></span></p><p class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p
class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">Bilal,<u></u><u></u></span></p><p
class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p><p
class="MsoNormal" style="text-indent:0.5in"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">you
might try a larger AWS instance to make sure your are getting 100% of the
box; might help some.<u></u><u></u></span></p><p class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<div><p class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)">Robert
<u></u><u></u></span></p>
</div><p class="MsoNormal"><span
style="font-size:11pt;font-family:calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<div>
<div
style="border-style:solid none none;border-top-width:1pt;border-top-color:rgb(225,225,225);padding:3pt 0in 0in"><p
class="MsoNormal"><b><span
style="font-size:11pt;font-family:calibri,sans-serif">From:</span></b><span
style="font-size:11pt;font-family:calibri,sans-serif"> <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>Michael Jerris<br>
<b>Sent:</b> Friday, April 14, 2017 4:25 PM<br>
<b>To:</b> FreeSWITCH Users Help <<a
href="mailto:freeswitch-users@lists.freeswitch.org"
target="_blank">freeswitch-users@lists.freeswitch.org</a>><br>
<b>Subject:</b> Re: [Freeswitch-users] Choppy audio when conferencing 4+
participants<u></u><u></u></span></p>
</div>
</div><div><div
class="m_-8579652609755085387m_7398230337600912797gmail-m_-470338840461164024h5"><p
class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">can you reproduce
the same issue on real hardware? We’ve seen all kinds of weird timing
issues that could account for this running on aws.<u></u><u></u></p>
<div><p class="MsoNormal"><u></u> <u></u></p>
<div>
<blockquote style="margin-top:5pt;margin-bottom:5pt">
<div><p class="MsoNormal">On Apr 14, 2017, at 4:16 PM, Bilal Dar <<a
href="mailto:bilal@rgate-systems.com"
target="_blank">bilal@rgate-systems.com</a>> wrote:<u></u><u></u></p>
</div><p class="MsoNormal"><u></u> <u></u></p>
<div>
<div><p class="MsoNormal">Its an AWS <span
style="font-size:10.5pt;font-family:arial,sans-serif;color:rgb(51,51,51)">m3.2xlarge
instance.</span><u></u><u></u></p>
</div>
<div><p class="MsoNormal"><u></u> <u></u></p>
<div><p class="MsoNormal">On Fri, Apr 14, 2017 at 9:57 AM, Michael Jerris
<<a href="mailto:mike@jerris.com"
target="_blank">mike@jerris.com</a>> wrote:<u></u><u></u></p>
<blockquote
style="border-style:none none none solid;border-left-width:1pt;border-left-color:rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in"><p
class="MsoNormal" style="margin-bottom:12pt">Real hardware or VM?<br>
<br>
> On Apr 14, 2017, at 12:48 PM, Bilal Dar <<a
href="mailto:bilal@rgate-systems.com"
target="_blank">bilal@rgate-systems.com</a>> wrote:<br>
><br>
> I have been struggling with an issue for almost 2 weeks.<br>
><br>
> Our regular calls have no quality issue and looking RTCP statistics
network conditions are perfect. We have normally on peak hr 60 calls and
around 10 conferences.<br>
><br>
> We have noticed that when we have 2 conferences of 4 or 5
participants, audio starts breaking for the users who are on conference.
Regular calls do not experience any quality degradation.<br>
><br>
> I upgraded the server to specs of 30Gig memory and 8 vCPU but still
the issue exists. Common thing I have noticed even during off-peak hrs is
that two 4+ participant call can cause the issue.<br>
><br>
> I have ruled out network & hardware. Last change I made was moved
all users to G.711 from G.722. Now I am not sure what other steps I can
take. Appreciate any suggestions.<u></u><u></u></p>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div><p
class="MsoNormal"><u></u> </p></div></div></div></div></div></div></div></blockquote></div></div></blockquote></div></div></div></div></div></blockquote></div></div></div></div></div></blockquote></div></div></div></blockquote></div></div></div></div></blockquote></div></div></div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
style="word-wrap:break-word"><div><div><blockquote type="cite"><div><div
class="gmail_extra"><div class="gmail_quote"><blockquote
class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div
style="word-wrap:break-word"><div><div><div
class="m_-8579652609755085387h5"></div></div></div></div></blockquote></div></div></div></blockquote></div></div></div></div></blockquote></div></div></div>_________________________________________________________________________<br>
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dir="ltr">-- <br></div><div data-smartmail="gmail_signature"><div
dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Anthony Minessale II
♬ @anthmfs ♬ @FreeSWITCH ♬<div><br><div>☞ <a
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