14 Jan
2025
14 Jan
'25
8:43 p.m.
Yes, on the same page with all of this. Good to know performance is comparable and I can
focus optimization efforts on non kemi functions.
In this case clickhouse access was needed, so that's where the impact is occurring now
that kemi scripting issues are under control. Performance is continuing to improve.
Thanks Daniel
-dan
________________________________
From: Daniel-Constantin Mierla <miconda(a)gmail.com>
Sent: Monday, January 13, 2025 02:31
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>rg>; Henning
Westerholt <hw(a)gilawa.com>
Cc: Daniel W. Graham <dan(a)cmsinter.net>
Subject: Re: [SR-Users] Re: Performance issues with KEMI
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Hello,
the performance of KEMI was compared when using Kamailio exported functions, in the way
that a function implemented inside Kamailio has pretty much same performance when using it
inside a kemi script or inside native config file. For example, if one uses
KSR.auth.pv_auth_check(...) inside kemi script or pv_auth_check(...) inside kamailio.cfg,
then the performance is very much the same.
Now, if you use a pure python/lua/... library inside your kemi script and it has poor
performances, then of course kamailio is slowed down, it is nothing that can be done by
kamailio code to improve that.
If you need to access database, sqlops functions are also exported to kemi.
To summarize, the goal was that the kemi engine does not add any (or at least not
significant) performance to execute Kamailio-specific functions compared to execution by
native config interpreter.
Cheers,
Daniel
On 13.01.25 03:56, Daniel W. Graham via sr-users wrote:
Native config resulted in over 10k calls per second without any drops.
I made some adjustments to the python config, looks like there was an issue with the way I
had been using return. That is handling almost 10k calls now.
However, when adding in other logic such as database calls using python libraries, back to
a few dozen calls before the queue grows and drops occur.
If performance is expected to be close to native, then I probably need to continue
identifying configuration issues.
-dan
________________________________
From: Daniel W. Graham via sr-users
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Sent: Sunday, January 12, 2025 10:32
To: Henning Westerholt <hw@gilawa.com><mailto:hw@gilawa.com>; Kamailio (SER) -
Users Mailing List
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Cc: Daniel W. Graham <dan@cmsinter.net><mailto:dan@cmsinter.net>
Subject: [SR-Users] Re: Performance issues with KEMI
Caution: This email originated from outside of the organization. Do not click links or
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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@gilawa.com><mailto:hw@gilawa.com>
Sent: Sunday, January 12, 2025 03:52
To: Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Cc: Daniel W. Graham <dan@cmsinter.net><mailto:dan@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@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Sent: Sonntag, 12. Januar 2025 08:21
To: sr-users@lists.kamailio.org<mailto:sr-users@lists.kamailio.org>
Cc: Daniel W. Graham <dan@cmsinter.net><mailto:dan@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
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