VoIP Mailing List Archives

[R.Kloosterman at mtel.nl]

Hello Ken, hello all,
I just read about the FreeSWITCH VMware applicance. I'm curious about your experiences with the audio quality on VMWare, so here's a new thread.
I've installed freeswitch on VMware Server for Windows. The IVR audio always plays choppy, while the server itself has no performance issues. The same poor voice quality also goes for Asterisk or Yate, even on a very fast VMware ESX system.
Did you experience the same and/or do you have pointers on how to troubleshoot and fix this?
Thanks,
Remko

[R.Kloosterman at mtel.nl]

Hello Ken, hello all,

I just read about the FreeSWITCH VMware applicance. I'm curious about
your experiences with the audio quality on VMWare, so here's a new
thread.

I've installed freeswitch on VMware Server for Windows. The IVR audio
always plays choppy, while the server itself has no performance issues.
The same poor voice quality also goes for Asterisk or Yate, even on a
very fast VMware ESX system.

Did you experience the same and/or do you have pointers on how to
troubleshoot and fix this?

Thanks,
Remko

-----Oorspronkelijk bericht-----
Van: freeswitch-users-bounces@lists.freeswitch.org
[mailto:freeswitch-users-bounces@lists.freeswitch.org] Namens Ken Rice
Verzonden: donderdag 15 januari 2009 5:05
Aan: freeswitch-users@lists.freeswitch.org;
freeswitch-dev@lists.freeswitch.org
Onderwerp: [Freeswitch-users] Announcing the FreeSWITCH Technology
PreviewVMWare Appliance.

Hey guys,

I'm not trying to start 1 a day releases, Things just happened to fall
that way...

FreeSWITCH + Centos 5.2 rolled into a VMWare appliance that's compatible
with VMWare for Windows, VMWare Player, and VMWare Fusion on the Mac.

Couple of things you need to know. 1) This is a Centos 5.2 X86_64 that
was updated before we started testing it. 2) FreeSWITCH SVN Trunk is
installed and operational. See /etc/motd on the running image for all
the good information.

We'll be unvailing a wiki page for this shortly.

For now you can get the head start by downloading this at
http://files.freeswitch.org/FreeSWITCH-VM1.0.0.zip

Have fun guys!

Ken



_______________________________________________
Freeswitch-users mailing list
Freeswitch-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org

_______________________________________________
Freeswitch-users mailing list
Freeswitch-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org

[krice at suspicious.org]

On 1/15/09 11:01 AM, "Remko Kloosterman" <R.Kloosterman@mtel.nl> wrote:

[msc at freeswitch.org]

If anyone figures this out please post it to this thread. I am working
on a wiki page for the VMWare appliance and I would like to be able to
inform people on how to handle this situation.

Also, IIUC, those running VMWare Fusion on Macs are not experiencing
this, correct? What about those using a hypervisor like ESXi? Any
known issues?

Thanks,
MC

On Thu, Jan 15, 2009 at 9:15 AM, Ken Rice <krice@suspicious.org> wrote:

[d at d-man.org]

I have been running FreeSWITCH on a VM ever since I got involved in the
project. It's been almost a year now. I didn't do anything special - it
works fine. I get audio problems if I go over 10 or 15 simultaneous calls.
This is on the following setup:

VMWare Server 1.0.6 and VMWare Server 2.0 (2.0 sucks, btw </rant>)
Dell Precision 360 (Desktop)
Pentium 4 2.66Ghz
2.5GB RAM (512MB allocated to FS)
Fedora Core 8, 2.6.23.1-42.fc8 stock kernel (a bit old)
7.2K 80GB hard drive

Yes, fancy machine I have, huh?


This is my normal day-to-day workstation as well as my VMWare Server. It
works fine, I got occassional missed heartbeat alerts and timer sync
notices, but they're rare.

- Darren



-----Original Message-----
From: Michael Collins [mailto:msc@freeswitch.org]
Sent: Thursday, January 15, 2009 9:32 AM
To: freeswitch-users@lists.freeswitch.org
Subject: Re: [Freeswitch-users] VMWare voice quality

If anyone figures this out please post it to this thread. I am working on a
wiki page for the VMWare appliance and I would like to be able to inform
people on how to handle this situation.

Also, IIUC, those running VMWare Fusion on Macs are not experiencing this,
correct? What about those using a hypervisor like ESXi? Any known issues?

Thanks,
MC

On Thu, Jan 15, 2009 at 9:15 AM, Ken Rice <krice@suspicious.org> wrote:

[damin at nacs.net]

You'll never fix this. Voice is a latency specific application unless you
figure out how to manipulate time. Any virtualization platform is going to
provide less timing granularity than raw hardware.

[chavpaskov at shaw.ca]

Michael Collins wrote:

[Prometheus001 at gmx.net]

Hello all,

let me also give some experience from the VirtualBox side (Community
Version).

Host machine
==========
AMD X2 64 3800 with 8GB of RAM
OS is a generic Debian 4.0R5 with Kernel 2.6.18-6-amd64
No special parameters in the Kernel.
Started with VirtualBox 1.5 and now on 2.0.x

Client machine (freeswitch)
===========
Ubuntu 8.041
Generic Kernel 2.6.24-18-generic #1 SMP, 1 CPU

Experience:
===========
A single call produces about 20% CPU load. So this is not usefull for
any production environment.
I did not discover any dropouts in a normal call between internal and
external UAs/gateways since 6 months. So for testing purposes its fine.
Voice between User Agents is always fine.
Seldomly I hear choppy voice when announcements are played. After some
minutes these problems go away.

Resume
===========
For testing/development purposes, FS on VirtualBox is fine. For any
productive environment it's not really usable in our environment.

Comparison with Asterisk
=================
Asterisk never worked in this environment:
Choppe voice between UAs and when playing sound. 100% CPU load on a
single call.
==========

Best regards
Peter

Gregory Boehnlein schrieb:

[jsacksteder at gmail.com]

This is a known issue with all virtualization solutions. The realtime
clocks inside the Virtual Machine jitter quite a bit which causes
havoc with the udp media streams. I have never heard of someone using
any VoIP product inside a VM and being happy with the result. To the
best of my knowledge, all the current VM products suffer from this -
Hyper-V, Xen and VMware, VMWare being the worst.

Xen shares access to the system clock with paravirtualized guests
directly, so you might find that to be somewhat better than VMWare.

More here - http://www.vmware.com/pdf/vmware_timekeeping.pdf

The performance of the server is irrelevant. Google for UDP jitter in
combination with VMWare.

On Thu, Jan 15, 2009 at 12:08 PM, Remko Kloosterman
<R.Kloosterman@mtel.nl> wrote:

[jlists at skopis.com]

Michael Collins wrote:

[nicholsonster at gmail...]

I think the problem with changing the CPU's is off your going from a single to multi, or multi to single CPU and not adjusting the kernel from SMP to normal or vise versa?

I've got a nice ESXi farm at the moment (32 cores, 48 gigs of ram) thats running at under 5% usage. Haven't noticed any timing issues yet with FS, but haven't put it under any type of load yet.


Thanks for the release, I'll see if i can get you some feedback.



On Thu, Jan 15, 2009 at 2:23 PM, Chav Paskov <chavpaskov@shaw.ca (chavpaskov@shaw.ca)> wrote: