13 Jan
2025
13 Jan
'25
2:32 a.m.
I haven't converted this test to native configuration yet. That is my next step to
rule out any general issues. I've never experienced any performance issues like this
before and since this was my first test using KEMI I assumed it was related in some
fashion. I've read through performance optimization related posts and documents that
I've been able to find.
-dan
________________________________
From: Henning Westerholt <hw(a)gilawa.com>
Sent: Sunday, January 12, 2025 03:52
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc: Daniel W. Graham <dan(a)cmsinter.net>
Subject: RE: Performance issues with KEMI
Caution: This email originated from outside of the organization. Do not click links or
open attachments unless you recognize the sender and know the content is safe
Hello Daniel,
I am wondering if your issues are specific to KEMI, e.g. if you’ve also tried the same
script logic with a native cfg and observing similar numbers? If it’s a simple script, you
can maybe just repeat the same test. There were benchmarks done for KEMI some years ago
which only showed a small performance difference.
Or do you have generic performance issues which you just happened to observe in your test
with KEMI? In this case it would be more of a generic performance optimization topic.
Cheers,
Henning
--
Henning Westerholt – https://skalatan.de/blog/
Kamailio services – https://gilawa.com<https://gilawa.com/>
From: Daniel W. Graham via sr-users <sr-users(a)lists.kamailio.org>
Sent: Sonntag, 12. Januar 2025 08:21
To: sr-users(a)lists.kamailio.org
Cc: Daniel W. Graham <dan(a)cmsinter.net>
Subject: [SR-Users] Performance issues with KEMI
Testing out KEMI functionality and running into performance issues. If I exceed 150 calls
per second the network receive queue grows and Kamailio is unable to keep up with requests
and they begin dropping.
KEMI script for testing is just doing a stateless reply to invites.
Using python3s module.
I've played with Kamailio child processes and memory allocations, but there is no
impact. I've also attempted some buffer / memory tweaking at the OS level, again with
no impact. Increasing CPU cores and even running the test on bare metal results in the
same.
Example of receive queue at 150 calls per second -
Netid State Recv-Q Send-Q Local Address:Port
udp UNCONN 337280 0 x.x.x.x:5060
Just wondering if anyone has experienced similar issues or has an example of the
performance they are seeing before I continue down this path.
Thanks,
- dan