[Freeswitch-users] Choppy audio when conferencing 4+ participants

Sat Apr 15 04:26:10 MSD 2017

I had a simillar issue, I fixed using tcmalloc

Le 14 avr. 2017 7:15 PM, "Brian West" <brian at freeswitch.org> a écrit :

> The best advice is Amazon Linux.
>
> /b
>
>
> On Fri, Apr 14, 2017 at 6:11 PM, Bilal Dar <bilal at rgate-systems.com>
> wrote:
>
>> I am going to try low latency driver and change frequency
>>
>> https://wiki.freeswitch.org/wiki/Amazon_EC2#Updating_Kernel_
>> Timer_to_1000HZ
>>
>> Any other great ideas for the weekend.
>>
>> On Fri, Apr 14, 2017 at 2:04 PM, Bilal Dar <bilal at rgate-systems.com>
>> wrote:
>>
>>> 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.
>>>
>>> Model   vCPU    Mem (GiB)       SSD Storage (GB)
>>> m3.large        2       7.5     1 x 32
>>> m3.2xlarge      8       30      2 x 80
>>>
>>>
>>>
>>> On Fri, Apr 14, 2017 at 1:53 PM, Colin Morelli <colin.morelli at gmail.com>
>>> wrote:
>>>
>>>> Robert,
>>>>
>>>> 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 *very* 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 *really bad* 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.
>>>>
>>>> Bilal,
>>>>
>>>> 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.
>>>>
>>>> Best,
>>>> Colin
>>>>
>>>> On Fri, Apr 14, 2017 at 4:34 PM, Mundkowsky, Robert <
>>>> rmundkowsky at ets.org> wrote:
>>>>
>>>>> Michael
>>>>>
>>>>>
>>>>>
>>>>> Just curious, why so many problems with VMs?
>>>>>
>>>>>
>>>>>
>>>>> I would think most applications need real time clocks that provide
>>>>> consistent valid data?
>>>>>
>>>>>
>>>>>
>>>>> Bilal,
>>>>>
>>>>>
>>>>>
>>>>> you might try a larger AWS instance to make sure your are getting 100%
>>>>> of the box; might help some.
>>>>>
>>>>>
>>>>>
>>>>> Robert
>>>>>
>>>>>
>>>>>
>>>>> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
>>>>> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Michael
>>>>> Jerris
>>>>> *Sent:* Friday, April 14, 2017 4:25 PM
>>>>> *To:* FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
>>>>> *Subject:* Re: [Freeswitch-users] Choppy audio when conferencing 4+
>>>>> participants
>>>>>
>>>>>
>>>>>
>>>>> 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.
>>>>>
>>>>>
>>>>>
>>>>> On Apr 14, 2017, at 4:16 PM, Bilal Dar <bilal at rgate-systems.com>
>>>>> wrote:
>>>>>
>>>>>
>>>>>
>>>>> Its an AWS m3.2xlarge instance.
>>>>>
>>>>>
>>>>>
>>>>> On Fri, Apr 14, 2017 at 9:57 AM, Michael Jerris <mike at jerris.com>
>>>>> wrote:
>>>>>
>>>>> Real hardware or VM?
>>>>>
>>>>> > On Apr 14, 2017, at 12:48 PM, Bilal Dar <bilal at rgate-systems.com>
>>>>> wrote:
>>>>> >
>>>>> > I have been struggling with an issue for almost 2 weeks.
>>>>> >
>>>>> > 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.
>>>>> >
>>>>> > 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.
>>>>> >
>>>>> > 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.
>>>>> >
>>>>> > 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.
>>>>>
>>>>>
>>>>>
>>>>> ------------------------------
>>>>>
>>>>> This e-mail and any files transmitted with it may contain privileged
>>>>> or confidential information. It is solely for use by the individual for
>>>>> whom it is intended, even if addressed incorrectly. If you received this
>>>>> e-mail in error, please notify the sender; do not disclose, copy,
>>>>> distribute, or take any action in reliance on the contents of this
>>>>> information; and delete it from your system. Any other use of this e-mail
>>>>> is prohibited.
>>>>>
>>>>> Thank you for your compliance.
>>>>> ------------------------------
>>>>>
>>>>> ____________________________________________________________
>>>>> _____________
>>>>> Professional FreeSWITCH Consulting Services:
>>>>> consulting at freeswitch.org
>>>>> http://www.freeswitchsolutions.com
>>>>>
>>>>> Official FreeSWITCH Sites
>>>>> http://www.freeswitch.org
>>>>> http://confluence.freeswitch.org
>>>>> http://www.cluecon.com
>>>>>
>>>>> 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
>>>>>
>>>>
>>>>
>>>> ____________________________________________________________
>>>> _____________
>>>> Professional FreeSWITCH Consulting Services:
>>>> consulting at freeswitch.org
>>>> http://www.freeswitchsolutions.com
>>>>
>>>> Official FreeSWITCH Sites
>>>> http://www.freeswitch.org
>>>> http://confluence.freeswitch.org
>>>> http://www.cluecon.com
>>>>
>>>> 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
>>>>
>>>
>>>
>>
>> _________________________________________________________________________
>> Professional FreeSWITCH Consulting Services:
>> consulting at freeswitch.org
>> http://www.freeswitchsolutions.com
>>
>> Official FreeSWITCH Sites
>> http://www.freeswitch.org
>> http://confluence.freeswitch.org
>> http://www.cluecon.com
>>
>> 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
>>
>
>
>
> --
>
> *Brian West*
> brian at freeswitch.org
>
> *Twitter: @FreeSWITCH , @briankwest*
>
> http://www.freeswitchbook.com
> http://www.freeswitchcookbook.com
>
> Book a phone call (CST) <https://freeswitch.com/appointment>
>
> Allison prompts for FreeSWITCH:
>
> *https://www.gofundme.com/allison-prompts-for-freeswitch*
> <https://www.gofundme.com/allison-prompts-for-freeswitch>
>
> Got Bugs? Report them here <https://freeswitch.org/jira>! | Reddit:
> /r/freeswitch <https://www.reddit.com/r/freeswitch>
>
> *T:*+19184209001 <(918)%20420-9001> | *F:*+19184209002 <(918)%20420-9002>
> | *M:*+1918424WEST (9378)
> *Skype:*briankwest
>
> _________________________________________________________________________
> Professional FreeSWITCH Consulting Services:
> consulting at freeswitch.org
> http://www.freeswitchsolutions.com
>
> Official FreeSWITCH Sites
> http://www.freeswitch.org
> http://confluence.freeswitch.org
> http://www.cluecon.com
>
> 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
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-users/attachments/20170414/af897956/attachment-0001.html 