[sr-dev] missing SAR messages

[Georgi Rosenov Stefanov]

Hi All,
I am experimenting with Kamailio 5.3.3 as an IMS and I am trying to do load
tests

I am using SIPp to generate SIP.REGISTER and MariaDB and a DIAMETER tool (
seagull)
For now I achieved registrations with "speed" 200 per/sec.
When I send SIP.REGISTER faster(let's say 500 per/sec) I see some SARs
missing, not sent at all.

I start debugging and found that cxdx_send_sar is responsible to creating
SAR message. I put my debug message in it.
The strange thing: there is a mismatch of my debug message (cxdx_send_sar
invocation) and real SAR send over the network.

What is the thing I missing  ?
Is there anything else responsible for SAR creating except  cxdx_send_sar ?
Did someone made similar tests ?
my test machine is Centos 7 with 3.10.0
Intel(R) Core(TM) i7-9700K CPU @ 3.60GHz
16G RAM
During this tests I see kamailio very low CPU usage, even when I push it
with 500/sec
The biggest CPU load is in MariaDB, but I do not have issues with UAR and
MAR
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