[Freeswitch-users] Bad sound quality and Abnormally large timer gap 100953 detected!

Fri Jul 29 01:52:36 MSD 2011

Thanks you all! I decided to keep hosting locally instead of upgrading from
VPS to a Dedicated Server and got DSL service with static ip to be able to
log in remotely.
Thanks again,
John

On Thu, Jul 28, 2011 at 8:16 AM, Peter Olsson <
peter.olsson at visionutveckling.se> wrote:

> It all depends really. On some solutions (depending on hypervisor, hardware
> and guest OS) the main problem can be that 20ms is a too short period to
> sleep, in that case a larger frame (ie 40ms) might help out. But mostly the
> problem is that the clock is not accurate enough, and fluxtuates from time
> to time (sometimes 20ms is 10, next round 30 etc).
>
> After my latest testing I've found out that latest ESXi (4.1) works quite
> good, as long as you make sure not to share out more CPU's to the guests
> then you have actual cores on the hardware, and makes sure to use a separate
> NIC for that guest OS. I will summarize the results from my tests on the
> wiki soon, but I'm away for now, and won't get access to all the information
> I need until I get back - after the ClueCon event(!).
>
> If using any kind of cloud environment (like the VPS the original questions
> was about) that's not under your own control, I highly recommend to solve it
> another way. Those solutions are usually to much loaded to get an accurate
> time. However, I do know that using for instance EC2 (xen) has worked for
> some, but that would also require that host to be on Linux (the original
> question was about Windows).
>
> /Peter
> ________________________________________
> Från: freeswitch-users-bounces at lists.freeswitch.org [
> freeswitch-users-bounces at lists.freeswitch.org] f&#246;r Bryan Smart [
> bryansmart at bryansmart.com]
> Skickat: den 28 juli 2011 13:52
> Till: FreeSWITCH Users Help
> Ämne: Re: [Freeswitch-users] Bad sound quality and Abnormally large timer
> gap 100953 detected!
>
> > Peter, thanks for those details.
>
> What sort of trade-offs, if any, are useful to improve audio for
> conferences and IVRs on VMs? Will increasing the interval setting for a
> conference help? What about using larger frames for codecs? I know that
> latency, beyond a point, is a serious quality issue of its own. Still, do
> you know what compromises provide the best improvement?
>
> Bryan
>
> > On 7/28/11, Peter Olsson <peter.olsson at visionutveckling.se> wrote:
> >> I feel I need to explain my last statement a little further :)
> >>
> >> First of all, you can run FS on virtual machines (even though I never
> >> recommend it), but you need to be in control of the virtual environment,
> or
> >> totally trust the ones controlling it.
> >>
> >> There are two basic problems when running on virtual hardware - timing
> and
> >> network I/O. For timing to work you need to make sure that the one
> >> controlling the virtual environment NEVER give out more CPU cores then
> there
> >> are available on the hardware. If they give out more, and your machine
> need
> >> to share resources with another machine, you will be in trouble. As soon
> as
> >> the other virtual machine starts to load the CPU, your machine will get
> bad
> >> timing. Also - usually a one core VM will get better timing then a two+
> core
> >> VM.
> >>
> >> Also, to be safe on the network side, you need your own NIC, that is not
> >> shared with other machines.
> >>
> >> If you feel you can control this, you might be successful with the
> setup, if
> >> you can't control this, you're either lucky (and things work anyway), or
> >> you'll get bad audio.
> >>
> >> Also, just passing RTP for normal call isn't the most critical issue
> (you
> >> don't even have to use a timer there), the most critical timing issues
> will
> >> occur in conferences or when using a local IVR on the machine.
> >>
> >> I've done lots of testing for this in my lab, since many of my customers
> >> wants to run our system (which uses FS for IVR/conferencing) on ESXi
> virtual
> >> hosts, and I've found the above to be quite critical to succeed with
> your
> >> virtual implementation.
> >>
> >> /Peter
> >>
> >> ____________________________
> >> Från: freeswitch-users-bounces at lists.freeswitch.org
> >> [freeswitch-users-bounces at lists.freeswitch.org] f&#246;r Giovanni
> Maruzzelli
> >> [gmaruzz at gmail.com]
> >> Skickat: den 28 juli 2011 09:37
> >> Till: FreeSWITCH Users Help
> >> Ämne: Re: [Freeswitch-users] Bad sound quality and Abnormally large
> timer
> >> gap 100953 detected!
> >>
> >> Hey guys 'n gal,
> >>
> >> the original post is asking for Windows!!!
> >>
> >> -giovanni
> >>
> >>
> >> On 7/28/11, Sam <lakersman2006 at yahoo.com> wrote:
> >>> i forgot to mention that the 50 to 60 calls also are doing majority of
> >>> g729
> >>> transcoding as well which does put th cpu to 85 to 90% full
> utilization.
> >>> So
> >>> don't knock virtual machines.
> >>>
> >>>
> >>>
> >>> ________________________________
> >>> From: Avi Marcus <avi at avimarcus.net>
> >>> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> >>> Sent: Wednesday, July 27, 2011 3:20 PM
> >>> Subject: Re: [Freeswitch-users] Bad sound quality and Abnormally large
> >>> timer
> >>> gap 100953 detected!
> >>>
> >>>
> >>> I'm running FS under Xen provided by Linode. I only run max 10
> concurrent
> >>> channels in production, but an MOH test sounded good through 200
> >>> concurrent
> >>> channels.
> >>> Linode says the CPU is the most underused resource on their systems...
> >>>
> >>>
> >>> -Avi
> >>>
> >>>
> >>> On Thu, Jul 28, 2011 at 12:57 AM, Michael Collins <msc at freeswitch.org>
> >>> wrote:
> >>>
> >>>
> >>>>
> >>>>
> >>>> On Wed, Jul 27, 2011 at 2:24 PM, Sam <lakersman2006 at yahoo.com> wrote:
> >>>>
> >>>> I run Asterisk on a virtual machine and it runs quite well even with
> >>>> approximately 50 to 60 simultaneous callers and tha'ts even with media
> >>>> passing thru it.
> >>>>>
> >>>> That's actually pretty impressive. What version of Asterisk do you
> use?
> >>>> And
> >>>> do you have to continually make sacrifices to the digital gods to keep
> >>>> them appeased? :P
> >>>>
> >>>> -MC
> >>>> _______________________________________________
> >>>> Join us at ClueCon 2011, Aug 9-11, Chicago
> >>>> http://www.cluecon.com 877-7-4ACLUE
> >>>>
> >>>> FreeSWITCH-users mailing list
> >>>> FreeSWITCH-users at lists.freeswitch.org
> >>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >>>> UNSUBSCRIBE:
> http://lists.freeswitch.org/mailman/options/freeswitch-users
> >>>> http://www.freeswitch.org
> >>>>
> >>>>
> >>>
> >>> _______________________________________________
> >>> Join us at ClueCon 2011, Aug 9-11, Chicago
> >>> http://www.cluecon.com 877-7-4ACLUE
> >>>
> >>> FreeSWITCH-users mailing list
> >>> FreeSWITCH-users at lists.freeswitch.org
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> >>> UNSUBSCRIBE:
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> >>
> >> --
> >> Sent from my mobile device
> >>
> >> Sincerely,
> >>
> >> Giovanni Maruzzelli
> >> Cell : +39-347-2665618
> >>
> >> _______________________________________________
> >> Join us at ClueCon 2011, Aug 9-11, Chicago
> >> http://www.cluecon.com 877-7-4ACLUE
> >>
> >> FreeSWITCH-users mailing list
> >> FreeSWITCH-users at lists.freeswitch.org
> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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> >> http://www.freeswitch.org
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Join us at ClueCon 2011, Aug 9-11, Chicago
> >> http://www.cluecon.com 877-7-4ACLUE
> >>
> >> FreeSWITCH-users mailing list
> >> FreeSWITCH-users at lists.freeswitch.org
> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> >> UNSUBSCRIBE:
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> >> http://www.freeswitch.org
> >>
> >
> > --
> > Sent from my mobile device
> >
> > Sincerely,
> >
> > Giovanni Maruzzelli
> > Cell : +39-347-2665618
> >
> > _______________________________________________
> > Join us at ClueCon 2011, Aug 9-11, Chicago
> > http://www.cluecon.com 877-7-4ACLUE
> >
> > FreeSWITCH-users mailing list
> > FreeSWITCH-users at lists.freeswitch.org
> > http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> > UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> > http://www.freeswitch.org
>
>
> _______________________________________________
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>
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