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SIPp: Generate calls of different call-durations

 Feb 11, 2021

You can use <pause> to introduce a delay in SIPp scenarios. Use <pause> between 200 OK and BYE to get required call length.
<pause milliseconds="5000"/> : pause the scenario for 5 seconds.
<pause/> : When this delay is not set, the value of the -d command line parameter is used.
<pause distribution="fixed" value="1000" /> pauses for 1 second.
<pause distribution="uniform" min="2000" max="5000"/> pauses between 2 and 5 seconds.
Find out more on SIPp documentation.

For distributed pauses, GNU Scientific Libraries (gsl) is needed. Install GSL using yum command.

# yum install gsl gsl-devel

Check that GSL is installed and working fine
gsl-randist seed n DIST param1 param2 ...

[root@localhost ~]# gsl-randist 5 10 exponential 45
11.2959
2.55424
92.0641
80.0909
10.421
20.3464
112.883
174.809
30.1605
4.23513
[root@localhost ~]#

Now change directory to sipp folder and install / re-install SIPp

# make clean
# ./configure --with-sctp --with-pcap --with-openssl --with-gsl 
# make

Note that you can omit sctp/pcap/openssl switches as par your requirement.

Here is a scenario xml file where I am using
<pause distribution="normal" mean="60000" stdev="15000"/>
This provides a normal pause with a mean of 60 seconds (i.e. 60,000 ms) and a standard deviation of 15 seconds. The mean and standard deviation are specified as integer milliseconds.

<?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE scenario SYSTEM "sipp.dtd"> <!-- This program is free software; you can redistribute it and/or --> <!-- modify it under the terms of the GNU General Public License as --> <!-- published by the Free Software Foundation; either version 2 of the --> <!-- License, or (at your option) any later version. --> <!-- --> <!-- This program is distributed in the hope that it will be useful, --> <!-- but WITHOUT ANY WARRANTY; without even the implied warranty of --> <!-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the --> <!-- GNU General Public License for more details. --> <!-- --> <!-- You should have received a copy of the GNU General Public License --> <!-- along with this program; if not, write to the --> <!-- Free Software Foundation, Inc., --> <!-- 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA --> <!-- --> <!-- Sipp 'uac' scenario with CDR and Pause --> <!-- ./sipp -i 10.108.60.155 -p 2500 -sf sh/pauseUac-cs1.xml -s 901 -m 1 10.108.60.128:2500 -trace_logs --> <!-- ./sipp -i 10.108.60.155 -p 2600 -sn uas --> <!-- --> <scenario name="Basic Sipstone UAC"> <!-- In client mode (sipp placing calls), the Call-ID MUST be --> <!-- generated by sipp. To do so, use [call_id] keyword. --> <!-- Content-Type: application/sdp --> <send retrans="500"> <![CDATA[ INVITE sip:[service]@[remote_ip]:[remote_port] SIP/2.0 Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch] From: "9876543210"<sip:9876543210@openplatform.xyz>;tag=[pid]9876543210Tag00[call_number] To: sut <sip:[service]@[remote_ip]:[remote_port]> Call-ID: [call_id] CSeq: 1 INVITE Contact: sip:9876543210@[local_ip]:[local_port] P-Asserted-Identity: <tel:9045470697> Max-Forwards: 70 Subject: Performance Test Content-Type: application/sdp Content-Length: [len] v=0 o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip] s=- c=IN IP[media_ip_type] [media_ip] t=0 0 m=audio [media_port] RTP/AVP 0 a=rtpmap:0 PCMU/8000 ]]> </send> <recv response="100" optional="true"> </recv> <recv response="180" optional="true"> </recv> <recv response="183" optional="true"> </recv> <!-- By adding rrs="true" (Record Route Sets), the route sets --> <!-- are saved and used for following messages sent. Useful to test --> <!-- against stateful SIP proxies/B2BUAs. --> <recv response="200" rtd="true"> </recv> <!-- Packet lost can be simulated in any send/recv message by --> <!-- by adding the 'lost = "10"'. Value can be [1-100] percent. --> <send> <![CDATA[ ACK sip:[service]@[remote_ip]:[remote_port] SIP/2.0 Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch] From: 9876543210 <sip:9876543210@[local_ip]:[local_port]>;tag=[pid]9876543210Tag00[call_number] To: sut <sip:[service]@[remote_ip]:[remote_port]>[peer_tag_param] Call-ID: [call_id] CSeq: 1 ACK Contact: sip:9876543210@[local_ip]:[local_port] Max-Forwards: 70 Subject: Performance Test Content-Length: 0 ]]> </send> <nop> <action> <assignstr assign_to="1" value="[timestamp]" /> <assignstr assign_to="2" value="[clock_tick]" /> <!-- Converts the string value in $2 to a double-precision value stored in $3. --> <todouble assign_to="3" variable="2" /> <!-- <log message="clock_tick on ACK is [$3]" /> --> </action> </nop> <!-- This delay can be customized by the -d command-line option --> <!-- or by adding a 'milliseconds = "value"' option here. --> <pause distribution="normal" mean="60000" stdev="15000"/> <!-- The 'crlf' option inserts a blank line in the statistics report. --> <send retrans="500"> <![CDATA[ BYE sip:[service]@[remote_ip]:[remote_port] SIP/2.0 Via: SIP/2.0/[transport] [local_ip]:[local_port];branch=[branch] From: 9876543210 <sip:9876543210@[local_ip]:[local_port]>;tag=[pid]9876543210Tag00[call_number] To: sut <sip:[service]@[remote_ip]:[remote_port]>[peer_tag_param] Call-ID: [call_id] CSeq: 2 BYE Contact: sip:9876543210@[local_ip]:[local_port] Max-Forwards: 70 Subject: Performance Test Content-Length: 0 ]]> </send> <recv response="200" crlf="true"> </recv> <nop> <action> <assignstr assign_to="4" value="[clock_tick]" /> <!-- <log message="clock_tick After BYE is [$4]" /> --> <!-- Converts the string value in $4 to a double-precision value stored in $5. --> <todouble assign_to="5" variable="4" /> <subtract assign_to="5" variable="3" /> <log message="StartTime is [$1],[last_From],[last_To],CallID is [call_id],CallDuration(ms) is [$5]" /> </action> </nop> <!-- definition of the response time repartition table (unit is ms) --> <ResponseTimeRepartition value="10, 20, 30, 40, 50, 100, 150, 200"/> <!-- definition of the call length repartition table (unit is ms) --> <CallLengthRepartition value="10, 50, 100, 500, 1000, 5000, 10000"/> </scenario>

To run this scenario I used following commands
UAC

# ./sipp -i 10.108.60.155 -p 2500 -sf uac-gsl-pause.xml -s 901 -m 11 10.108.60.128:2500 -trace_logs

UAS

# ./sipp -i 10.108.60.128 -p 2500 -sn uas

Call Durations received from above scenario (in seconds)
24.054, 40.841,49.815, 58.683, 59.418, 59.739, 62.013, 71.009, 73.409, 74.966, 85.12

Note: If SIPp is installed without GSL support it will give error like
The distribution 'normal' is only available with GSL..

And following is a csv log file generated for test calls, where last field is call duration

StartTime is 2021-02-10 06:31:37.037606 1612938697.037606,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag007,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704791,CallID is 7-30114@10.108.60.155,CallDuration(ms) is 24054.000000 StartTime is 2021-02-10 06:31:36.935199 1612938696.935199,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag006,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704788,CallID is 6-30114@10.108.60.155,CallDuration(ms) is 40841.000000 StartTime is 2021-02-10 06:31:37.135111 1612938697.135111,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag008,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704794,CallID is 8-30114@10.108.60.155,CallDuration(ms) is 49815.000000 StartTime is 2021-02-10 06:31:36.535084 1612938696.535084,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag002,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704775,CallID is 2-30114@10.108.60.155,CallDuration(ms) is 58683.000000 StartTime is 2021-02-10 06:31:37.237564 1612938697.237564,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag009,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704797,CallID is 9-30114@10.108.60.155,CallDuration(ms) is 59418.000000 StartTime is 2021-02-10 06:31:37.437211 1612938697.437211,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag0011,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704803,CallID is 11-30114@10.108.60.155,CallDuration(ms) is 59739.000000 StartTime is 2021-02-10 06:31:36.439722 1612938696.439722,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag001,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704772,CallID is 1-30114@10.108.60.155,CallDuration(ms) is 62013.000000 StartTime is 2021-02-10 06:31:36.734972 1612938696.734972,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag004,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704782,CallID is 4-30114@10.108.60.155,CallDuration(ms) is 71009.000000 StartTime is 2021-02-10 06:31:37.335106 1612938697.335106,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag0010,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704800,CallID is 10-30114@10.108.60.155,CallDuration(ms) is 73409.000000 StartTime is 2021-02-10 06:31:36.834866 1612938696.834866,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag005,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704785,CallID is 5-30114@10.108.60.155,CallDuration(ms) is 74966.000000 StartTime is 2021-02-10 06:31:36.635008 1612938696.635008,From: 9876543210 <sip:9876543210@10.108.60.155:2500>;tag=301149876543210Tag003,To: sut <sip:901@10.108.60.128:2500>;tag=9299937628567704779,CallID is 3-30114@10.108.60.155,CallDuration(ms) is 85120.000000