[OpenSIPS-Users] TCP Performance profiling

[Pete Kelly]

 I’ll give script trace a try…

loadmodule "proto_tcp.so"
modparam("proto_tcp", "tcp_parallel_handling", 1)
modparam("proto_tcp", "tcp_async", 1)

And

tcp_connect_timeout=100
tcp_connection_lifetime = 3600
tcp_max_connections=512
tcp_max_msg_time=2
tcp_parallel_read_on_workers=yes
tcp_socket_backlog=10
tcp_keepcount=9
tcp_keepidle=120
tcp_keepinterval=60

Although I think it must come from the TCP level as I have been doing some
profiling, and I see things like 180 and 200 taking 10+ seconds, when there
is nothing specified in the reply routes.

It’s calling rtpengine_offer on the INVITE so I wonder if that is causing
backlogs - although the profiling never seems to raise any issues on
INVITE/BYE - it’s only on the replies. Maybe related to transaction
matching or something?

Pete

On 14 Apr 2025 at 10:03:38, Bogdan-Andrei Iancu <bogdan at opensips.org> wrote:

> Hi Pete,
>
> Try the script_trace() function, to see if the delay comes from the script
> level. If not, it means it comes from the TCP layer (maybe related to the
> dispatching of TCP cons between workers)
>
> https://www.opensips.org/Documentation/Script-CoreFunctions-3-5#script_trace
>
> BTW, what are the TCP settings for:
>
> https://www.opensips.org/Documentation/Script-CoreParameters-3-5#tcp_parallel_read_on_workers
>     https://opensips.org/html/docs/modules/3.5.x/proto_tcp.html#idp5528016
>
> Regards,
>
> Bogdan-Andrei Iancu
>
> OpenSIPS Founder and Developer
>   https://www.opensips-solutions.com
>   https://www.siphub.com
>
> On 10.04.2025 23:42, Pete Kelly wrote:
>
> Hello all
>
> I am running some OpenSIPS proxies which are talking to each other
> exclusively in TCP, however when performing some (mild) load tests I am
> seeing some strange behaviour from time to time, which manifests itself as
> what looks like OpenSIPS taking a long time to process SIP requests.
>
> The most obvious issue I am seeing (and confirmed by tcpdump) is when
> OpenSIPS receives an invite but may take anything from 2-8 second to even
> send the 100 Trying!
>
> e.g.
>
> T 2025/04/10 20:28:10.257283 10.3.0.4:48665 -> 10.3.0.12:5080 [A] #4826
>
> INVITE sip:... SIP/2.0.
>
> T 2025/04/10 20:28:12.644355 10.3.0.12:5080 -> 10.3.0.4:48665 [AP] #4955
>
> SIP/2.0 100 Giving it a try.
>
> Is there an obvious route for me to debug this behaviour to try and see
> where the bottleneck may lie ? Can I see somewhere if all of the tcp
> workers are in use for example and it is waiting for a worker?
>
> Pete
>
>
>
>
>
> _______________________________________________
> Users mailing listUsers at lists.opensips.orghttp://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
>
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