[Freeswitch-users] Choppy VM when using loopback (on Debian lenny)

Anthony Minessale anthony.minessale at gmail.com
Thu Feb 3 21:32:31 MSK 2011 

maybe, but using loopback without the bowout is very costly.
you can also consider hair-pinning a call back to your own box over
SIP for this type of thing.


On Thu, Feb 3, 2011 at 12:28 PM, Dmitry Sytchev <kbdfck at gmail.com> wrote:
> Thanks, I will test tomorrow.
>
> I'm wondering if I could use att_xfer with loopbacks after these patches:D
>
> 2011/2/3 Anthony Minessale <anthony.minessale at gmail.com>:
>> commit fb66abfab4a74055c38cdc67da83e6e0175a4a0b
>> Author: Anthony Minessale <anthm at freeswitch.org>
>> Date:   Tue Feb 1 16:22:36 2011 -0600
>>
>> this is the one you need at a bare minimum.
>>
>> If you are still having problems the most likely cause is ptime
>> mismatch between the 2 ends of the call.
>> you cannot leave loopback in the call path when the legs are not on
>> the same ptime with very good results.
>>
>>
>> On Thu, Feb 3, 2011 at 4:31 AM, Dmitry Sytchev <kbdfck at gmail.com> wrote:
>>> We faced same trouble with FreeSWITCH Version 1.0.head (git-33848eb
>>> 2011-02-01 08-56-26 +0100), the problem persists with loopback
>>> channels. Even if two sip endpoints are bridged via loopback, sound is
>>> choppy.
>>>
>>> We have bridge_early_media=true on loopback channel bridge command and
>>> loopback_bowout=false, loopback_bowout_on_execute=false
>>>
>>> 2011/2/2 Dan Lane <null at invalid.name>:
>>>> This seems to have resolved the issue for us :)
>>>>
>>>> Thanks.
>>>>
>>>> On Tue, Feb 1, 2011 at 8:47 PM, Anthony Minessale
>>>> <anthony.minessale at gmail.com> wrote:
>>>>> Try the latest GIT, I reverted the last patch and tried to solve the
>>>>> problem differently.
>>>>>
>>>>>
>>>>> On Tue, Feb 1, 2011 at 2:11 PM, Dan Lane <null at invalid.name> wrote:
>>>>>> Yes, using 1f1541b our calls that use mod_loopback into mod_conference
>>>>>> are unusable. The audio is choppy and delay increases as time passes.
>>>>>>
>>>>>> I thought it was an issue relating to the default 100Hz kernel on EC2
>>>>>> so I spent some time yesterday putting together a 1000Hz kernel but it
>>>>>> didn't make any difference. In the meantime I've compiled mod_loopback
>>>>>> from 4c5426f and loaded it with my 1f1541b build which eliminates the
>>>>>> issue.
>>>>>>
>>>>>> I haven't added it to Jira yet as I want to spend some time debugging
>>>>>> it (and I also owe you some debug info for FS-2934) but the problem is
>>>>>> definitely there.
>>>>>>
>>>>>> On Tue, Feb 1, 2011 at 3:58 PM, Anthony Minessale
>>>>>> <anthony.minessale at gmail.com> wrote:
>>>>>>> Are you saying you have better results on that version than you do on
>>>>>>> the latest?
>>>>>>> What conditions do you have that cause you trouble, what is the
>>>>>>> endpoint on the other side.
>>>>>>>
>>>>>>> If the last commit to mod_loopback intended to improve audio quality
>>>>>>> actually makes it worse I need to investigate it.
>>>>>>>
>>>>>>>
>>>>>>> On Tue, Feb 1, 2011 at 5:53 AM, Dan Lane <null at invalid.name> wrote:
>>>>>>>> FWIW we've been also been having audio issues with loopback recently
>>>>>>>> on EC2 (with a 1000Hz kernel).
>>>>>>>>
>>>>>>>> We worked around it in the short term by reverting mod_loopback to
>>>>>>>> git-4c5426f during the build process.
>>>>>>>>
>>>>>>>> For anyone else who wants to try this just run "git checkout 4c5426f"
>>>>>>>> in src/mod/endpoints/mod_loopback then build as usual. This is NOT a
>>>>>>>> long term solution though.
>>>>>>>>
>>>>>>>> On Mon, Jan 31, 2011 at 8:02 AM, Øyvind Albrigtsen <oa at estation.dk> wrote:
>>>>>>>>> Thanks for all your feedback. I'll keep on trying and inform you what
>>>>>>>>> worked for me.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Regards
>>>>>>>>> Oyvind
>>>>>>>>>
>>>>>>>>> On 2011-01-29 21:48, Anthony Minessale wrote:
>>>>>>>>>> Everyone should try latest GIT before pondering any further because I
>>>>>>>>>> added a patch like 2 days ago to adress this issue.
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Sat, Jan 29, 2011 at 2:12 PM, Frank Park<frank at telonium.com>  wrote:
>>>>>>>>>>
>>>>>>>>>>> Yeah. I, too, don't see the correlation between the NTP and hw timer..
>>>>>>>>>>> I am not familiar with the timer_test command and what it's measuring, but
>>>>>>>>>>> of the 50 tests it ran, min is 19089 and max is 20713.
>>>>>>>>>>> Frank
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> On Fri, Jan 28, 2011 at 2:33 PM, David Ponzone<david.ponzone at ipeva.fr>
>>>>>>>>>>> wrote:
>>>>>>>>>>>
>>>>>>>>>>>> Frank,
>>>>>>>>>>>> I fail to see the relationship between the hw timer and NTP.
>>>>>>>>>>>> Can you please elaborate ?
>>>>>>>>>>>> David Ponzone  Direction Technique
>>>>>>>>>>>> email: david.ponzone at ipeva.fr
>>>>>>>>>>>> tel:      01 74 03 18 97
>>>>>>>>>>>> gsm:   06 66 98 76 34
>>>>>>>>>>>> Service Client IPeva
>>>>>>>>>>>> tel:      0811 46 26 26
>>>>>>>>>>>> www.ipeva.fr  -   www.ipeva-studio.com
>>>>>>>>>>>> Ce message et toutes les pièces jointes sont confidentiels et établis à
>>>>>>>>>>>> l'intention exclusive de ses destinataires. Toute utilisation ou diffusion
>>>>>>>>>>>> non autorisée est interdite. Tout message électronique est susceptible
>>>>>>>>>>>> d'altération. IPeva décline toute responsabilité au titre de ce message s'il
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>>>>>>>>>>>> message, merci de le détruire immédiatement et d'avertir l'expéditeur.
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Le 28/01/2011 à 19:49, Frank Carmickle a écrit :
>>>>>>>>>>>>
>>>>>>>>>>>> Hi
>>>>>>>>>>>>
>>>>>>>>>>>> On Jan 28, 2011, at 7:39 AM, Øyvind Albrigtsen wrote:
>>>>>>>>>>>>
>>>>>>>>>>>> Hi,
>>>>>>>>>>>>
>>>>>>>>>>>> I'm using latest git-version of Freeswitch, and when I go to voicemail
>>>>>>>>>>>>
>>>>>>>>>>>> when calling a number the sound playback is choppy and it skips some of
>>>>>>>>>>>>
>>>>>>>>>>>> the digits in the number I called.
>>>>>>>>>>>>
>>>>>>>>>>>> What kind of results do you get from timer_test at the fs_cli?  Are you
>>>>>>>>>>>> running on hardware or are you virtualized?  What is your clock source set
>>>>>>>>>>>> to and what are your available clock source options?  See
>>>>>>>>>>>> /sys/devices/system/clocksource/clocksource0/available_clocksource and
>>>>>>>>>>>> /sys/devices/system/clocksource/clocksource0/current_clocksource.  I am
>>>>>>>>>>>> running virtualized with the 2.6.26-2-xen-amd64 and I can get timer_test to
>>>>>>>>>>>> hang at 19998/19999 which works very well for me.  When I was having problem
>>>>>>>>>>>> it was reporting numbers all over the map from 17400 to 22600 with lots of
>>>>>>>>>>>> randomness in between.  I have my clocksource set to jiffies and xen
>>>>>>>>>>>> independent wallclock set to 1.  Of course at that point you need to have
>>>>>>>>>>>> ntp running against a bunch of servers to drive your clock nice and steady.
>>>>>>>>>>>>   I know my set up is probably a lot different than yours but I thought I'd
>>>>>>>>>>>> toss it out there to show that some of the harshest conditions can be dealt
>>>>>>>>>>>> with and don't give up trying.  If you are running on hardware with a cpu
>>>>>>>>>>>> that doesn't have constant_tsc then you might have some problems.  Just play
>>>>>>>>>>>> with the different timer options until you find the one that works.
>>>>>>>>>>>>
>>>>>>>>>>>> HTH
>>>>>>>>>>>> --FC
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> 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
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> _______________________________________________
>>>>>>>>>>>> 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
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>>
>>>>>>>>>>> ----=======================----
>>>>>>>>>>> Frank Park
>>>>>>>>>>> Telonium Communications, LLC
>>>>>>>>>>> frank at telonium.com
>>>>>>>>>>> http://www.telonium.com
>>>>>>>>>>> Follow Us on Twitter: @GetTelonium
>>>>>>>>>>> 404-566-8888 x1001 Office
>>>>>>>>>>> 404-939-4242 Cell
>>>>>>>>>>> ----=======================----
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> _______________________________________________
>>>>>>>>>>> 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
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> _______________________________________________
>>>>>>>>> FreeSWITCH-users mailing list
>>>>>>>>> FreeSWITCH-users at lists.freeswitch.org
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>>>>>>>>> http://www.freeswitch.org
>>>>>>>>>
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> FreeSWITCH-users mailing list
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>>>>>>>> http://www.freeswitch.org
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Anthony Minessale II
>>>>>>>
>>>>>>> FreeSWITCH http://www.freeswitch.org/
>>>>>>> ClueCon http://www.cluecon.com/
>>>>>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>>>>>
>>>>>>> AIM: anthm
>>>>>>> MSN:anthony_minessale at hotmail.com
>>>>>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>>>>>> IRC: irc.freenode.net #freeswitch
>>>>>>>
>>>>>>> FreeSWITCH Developer Conference
>>>>>>> sip:888 at conference.freeswitch.org
>>>>>>> googletalk:conf+888 at conference.freeswitch.org
>>>>>>> pstn:+19193869900
>>>>>>>
>>>>>>> _______________________________________________
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>>>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
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>>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> FreeSWITCH-users mailing list
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>>>>>> http://www.freeswitch.org
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Anthony Minessale II
>>>>>
>>>>> FreeSWITCH http://www.freeswitch.org/
>>>>> ClueCon http://www.cluecon.com/
>>>>> Twitter: http://twitter.com/FreeSWITCH_wire
>>>>>
>>>>> AIM: anthm
>>>>> MSN:anthony_minessale at hotmail.com
>>>>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>>>>> IRC: irc.freenode.net #freeswitch
>>>>>
>>>>> FreeSWITCH Developer Conference
>>>>> sip:888 at conference.freeswitch.org
>>>>> googletalk:conf+888 at conference.freeswitch.org
>>>>> pstn:+19193869900
>>>>>
>>>>> _______________________________________________
>>>>> FreeSWITCH-users mailing list
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>>>>> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
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>>>>>
>>>>
>>>> _______________________________________________
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>>>> http://www.freeswitch.org
>>>>
>>>
>>>
>>>
>>> --
>>> Best regards,
>>>
>>> Dmitry Sytchev,
>>> IT Engineer
>>>
>>> _______________________________________________
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>>>
>>
>>
>>
>> --
>> Anthony Minessale II
>>
>> FreeSWITCH http://www.freeswitch.org/
>> ClueCon http://www.cluecon.com/
>> Twitter: http://twitter.com/FreeSWITCH_wire
>>
>> AIM: anthm
>> MSN:anthony_minessale at hotmail.com
>> GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com
>> IRC: irc.freenode.net #freeswitch
>>
>> FreeSWITCH Developer Conference
>> sip:888 at conference.freeswitch.org
>> googletalk:conf+888 at conference.freeswitch.org
>> pstn:+19193869900
>>
>> _______________________________________________
>> FreeSWITCH-users mailing list
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>> http://www.freeswitch.org
>>
>
>
>
> --
> Best regards,
>
> Dmitry Sytchev,
> IT Engineer
>
> _______________________________________________
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> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
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>



-- 
Anthony Minessale II

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