Performance comparison between different versions of Asterisk and different channels. Presentation at Astricon 2017 Online Trainings Complete Asterisk PBX Training Coupon http://bit.ly/2E6U7fP Understanding and Troubleshooting SIP http://bit.ly/2WZKkzy VoIP Design Training Coupon http://bit.ly/2tlLFmG VoIP Hacking Training Coupon http://bit.ly/2X4Pjz7 Quick Start to OpenSIPS Coupon http://bit.ly/2Bt72XJ Books Complete Asterisk Training Paperback and Kindle Book https://amzn.to/2tm7TFb Complete Asterisk Training eBook PDF http://bit.ly/2UUebHG Building Telephony Systems with OpenSIPS http://bit.ly/2SsUt9a Treinamento Online SIP em Profundidade Coupon de Treinamento http://bit.ly/2GpatTq Asterisk Essencial Coupon de Treinamento http://bit.ly/2BzCjs1 Livros: Guia e Configuração do Asterisk Paperback e Kindle https://amzn.to/2S2lwmZ Guia de Configuração do Asterisk eBook PDF http://www.asteriskguide.com

1. Asterisk SIP Channel
Performance
CHAN_SIP VERSUS CHAN_PJSIP

2. Links to Trainings and Books
Online Trainings
Complete Asterisk PBX Training Coupon http://bit.ly/2E6U7fP
Understanding and Troubleshooting SIP http://bit.ly/2WZKkzy
VoIP Design Training Coupon http://bit.ly/2tlLFmG
VoIP Hacking Training Coupon http://bit.ly/2X4Pjz7
Quick Start to OpenSIPS Coupon http://bit.ly/2Bt72XJ
Books
Complete Asterisk Training Paperback and Kindle Book https://amzn.to/2tm7TFb
Complete Asterisk Training eBook PDF http://bit.ly/2UUebHG
Building Telephony Systems with OpenSIPS http://bit.ly/2SsUt9a
Treinamento Online (Português)
SIP em Profundidade Coupon de Treinamento http://bit.ly/2GpatTq
Asterisk Essencial Coupon de Treinamento http://bit.ly/2BzCjs1
Livros
Guia e Configuração do Asterisk Paperback e Kindle https://amzn.to/2S2lwmZ
Guia de Configuração do Asterisk eBook PDF http://www.asteriskguide.com

3. SipPulse
o Softswitch Development
o We use Asterisk as a media server
o We are evaluating to change the architecture and force all calls thru Asterisk
o We are evaluating Asterisk for a distributed PBX system
o Is it good enough or the task?

4. Objectives
o Which SIP channel should I choose?
o Are there significant differences between versions?
o What performance should we expect?

5. Reasons to test
o Is Asterisk good enough for the load required?
o Publish data on channel performance?

6. Cautions
o Do not get in a controversy regarding channels and development
o Adopt a scientific approach, results are results!
o Replicability, Method and Tools available

7. Methodology
o Generate traffic until retransmissions start
o Decrease the traffic until stabilization
o To have a phone call with music on hold to monitor quality
o Same hardware for all tests
o Asterisk restart after each test

8. Failure CriteriaFailure Criteria
Max 5 retransmissions
CPU below 60%
Clear audio while in test
Sustained for at least 5 min
Max 5 retransmissions
CPU below 60%
Clear audio while in test
Sustained for at least 5 min

9. Tests
1. Call to an echo channel, no media
1. Requests per second (CAPS)
2. Call to an echo channel, with media
1. Requests per second (CAPS)
2. Simultaneous calls
3. Register without qualify
1. Registrations per second
4. Register with qualify (OPTIONS)
1. Registrations per second

10. Improvements
Only two
◦ max files=500000 on asterisk.conf
◦ Unnecessary channels unloaded (chan_iax2, chan_skinny....)

11. Test Device
Intel Quad-Core Celeron 2GHz
4 GB RAM
16GB SSD

12. Tools and assumptions
SIPP traffic generator
Average Call Duration 90s
No retransmissions for 300s (5 min)
Minor errors accepted in logs while audio is ok.

13. Test with no media or authentication
Command Line
sipp -s 1000 10.8.1.46:5060 -sn uac -i 10.8.1.46 -d 1000
extensions.conf
[from-internal]
exten=>1000,1,Answer()
exten=>1000,n,Echo()
exten=>1000,n,Hangup()
exten=9000,1,Answer();
exten=9000,n,MusicOnHold()

14. Echo Test without media
295 295 295
510 500
0
100
200
300
400
500
600
Asterisk 11 Asterisk 13 Asterisk 15
chan_sip chan_pjsip

15. ... And the winner is chan_pjsip with * 13.17.2!

16. Echo test with media
Command line
sipp -s 1000 10.8.1.46:5060 -sf sipp_pcap.xml -i 10.8.1.46 -d 90000

17. Echo Test with media calls per second
35 35 35
34 34
33,4
33,6
33,8
34
34,2
34,4
34,6
34,8
35
35,2
Asterisk 11 Asterisk 13 Asterisk 15
chan_sip chan_pjsip

18. Echo Test with Media chan_sip

19. Echo Test with Media chan_pjsip

20. Registration chan_pjsip (1 account)

21. Registrations using chan_sip (1 account)

22. Registrations using chan_sip (4000
accounts)

23. Registrations using pjsip (4000 accounts)

24. CDR issues
o The first version I've used was asterisk certified/13.13-cert6
o No CDRs in csv format
Connected to Asterisk certified/13.13-cert6 currently running on asterisk (pid = 31381)
[Oct 3 10:56:40] NOTICE[31381]: confbridge/conf_config_parser.c:2094 verify_default_profiles: Adding default_menu menu
to app_confbridge
[Oct 3 10:56:41] NOTICE[31381]: cel_custom.c:97 load_config: No mappings found in cel_custom.conf. Not logging CEL to
custom CSVs.
Asterisk Ready.
asterisk*CLI> module show like cdr
Module Description Use Count Status Support Level
app_cdr.so Tell Asterisk to not maintain a CDR for 0 Running core
app_forkcdr.so Fork The CDR into 2 separate entities 0 Running core
cdr_adaptive_odbc.so Adaptive ODBC CDR backend 0 Running core
cdr_custom.so Customizable Comma Separated Values CDR 0 Running core
cdr_manager.so Asterisk Manager Interface CDR Backend 0 Running core
cdr_syslog.so Customizable syslog CDR Backend 0 Not Running core
func_cdr.so Call Detail Record (CDR) dialplan functi 0 Running core
7 modules loaded

25. CDR Issues
o In version 13.17.2, the CDRs were different
asterisk*CLI> module like cdr
No such command 'module like cdr' (type 'core show help module like cdr' for other possible commands)
asterisk*CLI> module show like cdr
Module Description Use Count Status Support Level
app_cdr.so Tell Asterisk to not maintain a CDR for 0 Running core
app_forkcdr.so Fork The CDR into 2 separate entities 0 Running core
cdr_adaptive_odbc.so Adaptive ODBC CDR backend 0 Running core
cdr_csv.so Comma Separated Values CDR Backend 0 Running extended
cdr_custom.so Customizable Comma Separated Values CDR 0 Running core
cdr_manager.so Asterisk Manager Interface CDR Backend 0 Running core
cdr_odbc.so ODBC CDR Backend 0 Running extended
cdr_pgsql.so PostgreSQL CDR Backend 0 Not Running extended
cdr_sqlite3_custom.so SQLite3 Custom CDR Module 0 Not Running extended
cdr_syslog.so Customizable syslog CDR Backend 0 Not Running core
cdr_tds.so FreeTDS CDR Backend 0 Not Running extended
func_cdr.so Call Detail Record (CDR) dialplan functi 0 Running core

26. Undesired CDR, SQLITE2?
root@asterisk:/var/lib/asterisk# sqlite sqlite.db
sqlite
32194|"sipp" <sipp>|sipp|1000|from-internal|SIP/10.8.1.46-
0000341d||Echo||2017-10-02 09:04:55|2017-10-02 09:04:55|2017-10-02
09:05:05|10|10|ANSWERED|DOCUMENTATION||1506945895.13341|
32195|"sipp" <sipp>|sipp|1000|from-internal|SIP/10.8.1.46-0000341e||E^C
SQL error: interrupted
sqlite> select count(*) from ast_cdr;
185659
sqlite>

27. Undesired CDR, SQLITE2?

28. Take Aways, lessons learned
o Stock asterisk is terrible, at least increase the number of max_files in asterisk.conf
oThe new pjsip is faster than chan_sip, performance is not an issue
o Asterisk 13 cert6 is broken when using qualify, use the latest
o Removing the sqlite2 almost doubled the number of calls per second
o Registrations performance decreased in newer versions
o The cause is not the channel, but sqlite3
o Performance is enough for media servers, gateways and even mid-range PBXs
o For multitenant, a middle registrar and a balancer are required