VoIP Mailing List Archives

[Jerry.Kendall at Bisho...]

Hello all,

I'm having some interesting problems with our Freeswitch system.

I have found Tim's posting athttps://lists.freeswitch.org/pipermail/freeswitch-users/2012-February/080422.html

It seems very similar but does not help me... Wish it did.


Hardware: Dell R610, dual 6 core Xeon X5680 @ 3.3GHz with 10 Gig of RAM
Network: Dual 10Gig Fiber to 40Gig fabric

Databases: also Dell R610 with dual 10Gig and Mariadb 10.5.9 NO ISSUES - VERY FAST - ULTRA LOW LATENCY



We have 2 different FS systems
1) One acting as an SBC of sorts - process SIP/RTP
2) One acting as a PBX - process SIP/RTP

Providers are connected to SBC (public - context)
PBX (sbc - context) connects to SBC (internal - context)
End Points connect to PBX (device - context)

picographically:

ITSP --- SBC --- PBX --- EndPoints

The machine running FreeSWITCH as an SBC is fine - 50 calls (100 sessions) and near zero load average - CPU idle 98% - ALL GREAT

About 100 devices registered, all NAT'd, approx 50 subscription via BLF buttons
Registration period is maxed to 60 minutes and most devices use the default of 60 minutes

Typically, We see only a few CPS, maybe 5 if it's really busy

All our trunks are SIP. Only using PCMU/8000 codec.

We use MARIADB in the core - as well as for sofia, voicemail, and anything else that can use it.

Config, Directory and dialplan are done using CURL and handled via apache2 on the same server over 127.0.0.1.

I keep hearing about FS systems handling thousands of users on one box.
I'm nowhere near that and it seems to be maxed out.

Freeswitch on both systems is Version 1.10.6-release git 1ff9d0a 2021-03-25 13:16:09Z 64bit

So... The problem

The machine running FreeSWITCH as a PBX seems to be struggling during periods of any usage - even only 1 call (2 channels).

Just a moment ago, load average is 4.5 - CPU Idle is 65% - 8 sessions active - 315 sessions since startup - 45 threads - 8 hours running

The audio seems fine - no complaints reported..
There is a very noticable chocking on the BLFs though... Every few minutes, the BLFs just freeze - yes - freeze... Then they catch up

for example, for testing this, I have programmed a BLF on one phone.

I run manually "luarun /etc/freeswitch/scripts/on.lua *8896@domain.com" - the lights turns red
then after a few seconds,
I run manually "luarun /etc/freeswitch/scripts/off.lua *8896@domain.com" - the light turns green
Sometimes, when I run these manually, the lights take 30 seconds to change - sometimes - usually, under a second.


They change the state of the subscribe target
Here is the LUA script to turn the light ON(RED)

##############################################################
#!/lua

local random = math.random
math.randomseed(os.time())

local function uuid()
local template ='xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'
return string.gsub(template, '[xy]', function (c)
local v = (c == 'x') and random(0, 0xf) or random(8, 0xb)
return string.format('%x', v)
end)
end

local function SendCallDirectorBLFevent()

Uuid = uuid()

local event = freeswitch.Event("PRESENCE_IN")
event:addHeader("proto", "sip")
event:addHeader("event_type", "presence")
event:addHeader("alt_event_type", "dialog")
event:addHeader("Presence-Call-Direction", "outbound")
event:addHeader("from", argv[1])
event:addHeader("login", argv[1])
event:addHeader("unique-id", Uuid )
event:addHeader("answer-state", "confirmed")
event:fire();
end

SendCallDirectorBLFevent()
##############################################################

The issue is the choking on the BLFs and the HIGH load avg for such small amounts of calls on the PBX - the SBC seems fine.

SO.....

I have been trying to resolve this for about a month - looking everywhere I could.
I have monitored the network stats, disk IO stats, cpu usage, processes, etc.... I don't see anything different between the SBC and PBX stats...


I would like the BLFs to show the correct state a little faster (more like half a second, not 10-60 seconds after the event) and would I like to know how to fix the high CPU load on the PBX.

I have confirmed 2 things today:
1) it's not using mod_mariadb as I put back the ODBC and not help
2) this is seems most noticeable when new calls come in. The BLFs pause to 5-8 seconds and continue - there is a noticeable spike in load avg when calls keep coming in for 5 minutes...


Any information that would be helpful?


Thanks,
Jerry


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[Jerry.Kendall at Bisho...]

[krice at freeswitch.org]

just keep in mind registration and blf subs etc count as CPS (sip calls/sec) why not offload that stuff to opensips?
Sent from my iPhone

[Jerry.Kendall at Bisho...]

So, after 3 weeks of trying to get to the bottom of the problem,


it turns out that it was my LUA scripts...


Kill the LUA scripts and the problems all vanished (ran SIPp at 30cps for an hour and no issues).


The lua scripts are very simple, they are used to log selected events in the DB...


So, the next question: why would launching a lua script to save event data in the DB cause such problems....

The lua script is basically:

=====================================

local function CallBack_1(row)
end


local function SaveEventInfo()

local EventName = getSIPHeader("Event-Name")
local EventSubClass = getSIPHeader("Event-Subclass")
local CoreUUID = getSIPHeader("Core-UUID")
local Switchname = getSIPHeader("FreeSWITCH-Switchname")
local Sequence = getSIPHeader("Event-Sequence")
local State = getSIPHeader("Channel-State")
//get a few more headers

Build SQL statement = ......

ConnectDB()
dbh:query(SQL, CallBack_1)
DisconnectDB()

end


if ( EventName == "CHANNEL_CREATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_DESTROY" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_STATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_CALLSTATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ANSWER" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HANGUP" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_EXECUTE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNHOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_BRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNBRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS_MEDIA" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_OUTGOING" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNPARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_APPLICATION" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ORIGINATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UUID" ) then SaveEventInfo()
elseif ( EventName == "CUSTOM" ) then SaveEventInfo()
end
===============================================


Any thoughts?




On 9/24/2021 8:19 PM, Jerry Kendall wrote:

[Jerry.Kendall at Bisho...]

Thanks Ken,

I have actually played with putting Kamailio in between the End Devices and FS but could not get Kamailio to do the REG/SUB and let all other things hit FS...
I could'nt even get the SUBs to work of Kamailio..

I get the REG working but that was all.

Do you have a cfg file that can get me started ? Does anyone ?

Thanks,
Jerry

On 9/26/2021 4:25 PM, Ken Rice wrote:

[krice at freeswitch.org]

Interesting, one thing you might try is just sryup something to listen for these events right from ESL externally. then you dont have to take the fork and spawn a new process for each event.

Sent from my iPhone

[krice at freeswitch.org]

Sorry i dont have a config. However with OpenSips they have this midregister proxy option that eats a lot of the registration load for nat busting. you might read up on that and see if that helps any

Sent from my iPhone

[botelist at gmail.com]

It's possible that it is not the script itself causing the problem, but rather the choice of how to execute it. I'm just throwing stuff at the wall to see if it sticks, but running scripts within the channel/telephony session usually causes problems of various sorts.

Ken's idea of monitoring ESL events eliminates this possibility, if it's doable.

Alternatively, if you could kick off the script in a separate thread/run space that might help. Let the telephony session do its thing and do accounting and other work elsewhere.

This is just generalized advice.


---
John Boteler
Bote Communications



-----Original Message-----
From: FreeSWITCH-users <freeswitch-users-bounces@lists.freeswitch.org> On Behalf Of Jerry Kendall
Sent: Sunday, 26 September, 2021 13:15
To: freeswitch-users@lists.freeswitch.org
Subject: Re: [Freeswitch-users] High CPU usage and Slow BLFs with only 8 channels?

So, after 3 weeks of trying to get to the bottom of the problem,


it turns out that it was my LUA scripts...


Kill the LUA scripts and the problems all vanished (ran SIPp at 30cps for an hour and no issues).


The lua scripts are very simple, they are used to log selected events in the DB...


So, the next question: why would launching a lua script to save event data in the DB cause such problems....

The lua script is basically:

=====================================

local function CallBack_1(row)
end


local function SaveEventInfo()

local EventName = getSIPHeader("Event-Name")
local EventSubClass = getSIPHeader("Event-Subclass")
local CoreUUID = getSIPHeader("Core-UUID")
local Switchname = getSIPHeader("FreeSWITCH-Switchname")
local Sequence = getSIPHeader("Event-Sequence")
local State = getSIPHeader("Channel-State")
//get a few more headers

Build SQL statement = ......

ConnectDB()
dbh:query(SQL, CallBack_1)
DisconnectDB()

end


if ( EventName == "CHANNEL_CREATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_DESTROY" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_STATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_CALLSTATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ANSWER" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HANGUP" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_EXECUTE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_HOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNHOLD" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_BRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNBRIDGE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PROGRESS_MEDIA" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_OUTGOING" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_PARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UNPARK" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_APPLICATION" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_ORIGINATE" ) then SaveEventInfo()
elseif ( EventName == "CHANNEL_UUID" ) then SaveEventInfo()
elseif ( EventName == "CUSTOM" ) then SaveEventInfo()
end
===============================================


Any thoughts?




On 9/24/2021 8:19 PM, Jerry Kendall wrote:

[khorsmann at gmail.com]

Hi List,

the sip proxy Kamailio can also act as mid register you can stack the pieces together, there is not a separate module. 
Here is Fred Posner example:


https://github.com/fredposner/scripts/blob/master/kamailio/mid-registrar.cfg



Kind regards 
Karsten Horsmann 


Ken Rice <krice@freeswitch.org (krice@freeswitch.org)> schrieb am Mo., 27. Sept. 2021, 03:40: