[Freeswitch-users] Jitter and dropping MOS score

[John Hardiman]

Hi Christoph,

For the CPU part: On linux boxes if a process in top goes over 100% or top shows >1.0 in load, this means that more than one core is occupied. Since you have 16 cores this is fine as you are using 1/16 of your CPU for the FreeSWITCH process. So 200% would be 2 cores fully used etc, etc.

For the Jitter part/dropping MoS, we might need a bit more info, like times or patterns that is happens or even what the MoS drops by and how much jitter is seen. I personally use SNGrep and a combination of Homer/VoIPMonitor to get all of the stuff I need. 

Accurate monitoring will point you in the right direction if there is an issue (Homer 7 is free and really good as a side note)

Thanks,

John.

-----Original Message-----
From: Christoph Russow <russow at emtex.de> 
Sent: 05 October 2021 10:34
To: freeswitch-users at lists.freeswitch.org
Subject: [Freeswitch-users] Jitter and dropping MOS score

Hi all,

we are currently experiencing jitter and dropping MOS score on an increasing amount of calls on our system.

i can't see any increased load on our system (neither CPU nor I/O wise).

Current stats:

~ 15Mbit/s network traffic (on a 1Gbit/s network) load average: 1,10, 0,82, 0,91 (16 core machine) memory used: 2,26GB/16GB

freeswitch at lc1> status
UP 0 years, 12 days, 13 hours, 30 minutes, 24 seconds, 649 milliseconds,
831 microseconds
FreeSWITCH (Version 1.10.1 -release-12-f9990221e6 64bit) is ready
137634 session(s) since startup
218 session(s) - peak 245, last 5min 222
1 session(s) per Sec out of max 30, peak 8, last 5min 2
1000 session(s) max
min idle cpu 0.00/95.37
Current Stack Size/Max 244K/244K

System ist not virtualized.

the only "strange" thing i see is the freeswitch "main"process that consumes (according to htop) >=100% cpu (see attached screenshot).
Can this be the problem? if yes what can i do against it.

if not what are possible bottlenecks i should weed out?

if you need any additional informations to help me sort out this problem please don't hesitate to ask.

Thanks in advance and best regards
Christoph



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EMTEX GmbH
Christoph Russow
Software Engineer

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