23 Mar
2024
23 Mar
'24
5:21 a.m.
The OP mentioned that the load is around 10% at 330cps, so load is not an
issue. Traffic bottleneck can be an issue.
The default udp queue length is not enough for high cps.
And of course, you need to keep a balance between all the variables that
affect traffic :)
-ovidiu
On Fri, Mar 22, 2024 at 15:15 Alex Balashov via sr-users <
sr-users(a)lists.kamailio.org> wrote:
I don't know that I would do that. If your server
isn't coping with the
load, making the kernel receive queue deeper doesn't increase throughput,
it just relocates the queueing -- or rather, adds another layer of
queueing.
Squeeze the balloon in one place, it inflates in another.
-- Alex
On Mar 22, 2024, at 1:05 PM, Ovidiu Sas via
sr-users <
sr-users(a)lists.kamailio.org> wrote:
I assume that you are using udp.
Please increase the length of the udp queue:
https://medium.com/@CameronSparr/increase-os-udp-buffers-to-improve-perform…
Regards.
Ovidiu Sas
On Fri, Mar 22, 2024 at 12:56 Sergio Charrua via sr-users <
sr-users(a)lists.kamailio.org> wrote:
Hi all!
I have been doing some performance tests with Kamailio 5.7.4 and SIPp.
The infrastructure is as follows:3 VMs running on VMWare ESXi running:
UAC on 10.20.0.1 with SIPP-> Kamailio on 10.20.0.5 -> UAS on 10.20.0.3
The Kamailio VM has 6 dedicated vCPU of type Intel(R) Xeon(R) Silver
4216 CPU @
2.10GHz and, 2 NICs and 4Gb RAM and MariaDB 10.6 as DB Backend.,
all running on a HP G380 host with a gazillion CPUs and a googol disk space!
I currently have 3 scripts:
- script #1 stateful with RTJson and simulating requests to routing
engine and
accounting
- script #2 stateful but with just a simple
routing to UAS, no rules, no
DB,
- script #3 stateless with a forward to UAS
With script #3 I can go up to 2000CPS without issues with CPU at 37%!
Above that
value, I get retransmissions everywhere.
On both scripts #1 and #2, the limit is 330CPS
max after which I get a
lot of retransmissions, while CPU/Core usage on Kamailio
server stays below
10%.
So I do not expect this to be a CPU issue.
I could not understand why such (low) results, so I followed this
article found
at
https://www.kamailio.org/docs/openser-performance-tests/#tm-tests-c
and created exact same scenarios, with kamailio script and SIPP
templates
available on the article, hoping for better results.
But I get the same results: between 300 and
330CPS which is far, very
far from the 7000CPS found in the article!
I understand that I'm using VMs and probably the tests made for the
article,
which is pretty old already, were made on physical servers. Still,
I would not expect 95% of lower performance!
Any clue what could be the issue? I suspect NICs, but....
Any tips anyone could share?
Thanks in advance!
Sérgio Charrua
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--
Alex Balashov
Principal Consultant
Evariste Systems LLC
Web: https://evaristesys.com
Tel: +1-706-510-6800
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