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The problem is probably due to the fact the SUT answers too slowly to the REGISTERs: in the registration scenario, the metric for receiving the first 401 for instance is set to 2 seconds(see PX_TRT-REG1). This means that, if the SUT answers in more than 2 seconds, the scenario is considered as a failure.
There are SUT very slow responding to the first REGISTER. In your case, as all the REGISTERs are sent at the same time, if the SUT get stuck for two seconds before being able to answer to the first one, all the registrations will take more than 2 seconds, and all will be considered as failures.
There are two ways to check that those assumptions are correct:
- Reduce the load of the registration (you sent your registrations at 100 cps. Set this for instance to 5 or even to 1, and check whether there is a difference). You can change this in manager.xml (see cps=100)
- Use tcpdump to see the messages exchanged between the test system(s) and the SUT, as well as their timings.
From: rosa rosa [mailto:rosa.ui07@...]
Sent: Thursday, May 26, 2011 5:40 PM
To: Verbeiren, David
Subject: [Sipp-users] sipp ims bench, IHS=100%
i'm a newbie in using IMS Bench,and i get confused with it, so i
really need your explanation and advice..
when i run a scenario with default scenario mix, i always get IHS=100%
for 100 user, i have to run the same scenario about 3 or 4 times, to
decrease the error..
actually my target is only to get all the user registered in my
system, because i just want to see the system behavior in replacing
user to the right scscf..
what should i do to get minimum error in IMS Bench?
i try to look at the error.log but seems nothing error found..
FYI i just gonna use maximum 1000 users..
i attach the manager.log when running 100 user and the error.log
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