[Freeswitch-users] Call quality issues

[Michael Collins]

What about the operating system? Same rev, same kernel, same timing?
-MC

On Fri, Apr 29, 2011 at 10:10 AM, Eric Beard <eric at loopfx.com> wrote:

> It seems to be a CPU issue.
>
>
>
> I started from scratch today with a new machine, same exact hardware, and I
> am running 20 calls at less than 1% CPU, with perfect audio quality (same as
> the bad machine before it went bad).
>
>
>
> On the bad machine, 20 calls causes the CPU to be at 20%, and quality is
> shaky.  30 calls and it’s terrible.  Only the freeswitch process is eating
> CPU.
>
>
>
> I have diffed the conf folders and everything is the same.  This is driving
> me nuts.  I have no idea  what I did to that machine to ruin the
> performance.
>
>
>
> -----------------------
>
> *Eric Z. Beard, CTO*
>
> Loop LLC
>
> w (877) 850-2010 x9249
>
> m (727) 776-2768
>
> eric at loopfx.com
>
>
>
> *From:* freeswitch-users-bounces at lists.freeswitch.org [mailto:
> freeswitch-users-bounces at lists.freeswitch.org] *On Behalf Of *Michael
> Collins
> *Sent:* Friday, April 29, 2011 12:57 PM
> *To:* FreeSWITCH Users Help
> *Subject:* Re: [Freeswitch-users] Call quality issues
>
>
>
>
>
> On Thu, Apr 28, 2011 at 2:52 PM, Eric Beard <eric at loopfx.com> wrote:
>
> Hello,
>
>
>
> I ran into some major call quality issues this week, and I’m trying to
> figure out how to troubleshoot things.  I’ve been running FreeSwitch for a
> few weeks, and suddenly a few days ago my call quality dropped drastically.
> I had been running more than 100 concurrent calls, with the CPU at less than
> 20%, but now at 20 concurrent calls, the CPU is still at a little less than
> 20%, and the call quality is bad – any higher and calls go almost completely
> silent.  There is a direct correlation between the number of simultaneous
> calls and call quality.
>
>
>
> I have tested against multiple gateways, same results against each, so it’s
> not an issue with the gateway.
>
>
>
> I have captured packets on the machine and analyzed them with Wireshark.
> It seems like the inbound packets are all fine, no jitter or loss.  But the
> packets being sent by FreeSwitch are degraded.
>
>
>
> One sample call showed:
>
>
>
> Drop by Jitter Buff:158(14.1%) Out of Seq 0 (0.0%) Wrong Timestamp 96(8.6%)
>
>
>
> What is the topology of the network path for the above call? Also, where on
> the LAN/WAN did you capture these packets? Wrong timestamps and 14% dropped
> packets suggests that something on the network is interfering with the
> delivery of these packets in a timely manner.
>
> -MC
>
>
>
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