[SR-Users] event_route[core:msg-received] native vs kemi/lua

[GG GG]

I use the /misc/examples/kemi/kamailio-basic-kemi.cfg with log disabled. No
log is printed at all, on a Intel(R) Core(TM) i7-2600K CPU @ 3.40GHz.
What's your results ?

# and my lua file
-- Kamailio - equivalent of routing blocks in Lua
--
-- KSR - the new dynamic object exporting Kamailio functions (kemi)
-- sr - the old static object exporting Kamailio functions
--

-- Relevant remarks:
--  * do not execute Lua 'exit' - that will kill Lua interpreter which is
--  embedded in Kamailio, resulting in killing Kamailio
--  * use KSR.x.exit() to trigger the stop of executing the script
--  * KSR.drop() is only marking the SIP message for drop, but doesn't stop
--  the execution of the script. Use KSR.x.exit() after it or KSR.x.drop()
--


-- global variables corresponding to defined values (e.g., flags) in
kamailio.cfg
--FLT_ACC=1

-- SIP request routing
-- equivalent of request_route{}
function ksr_request_route()
        KSR.info("===== request route\n");
end

function ksr_core_received()
        KSR.x.exit();
end

On Tue, Nov 12, 2019 at 4:21 PM Daniel-Constantin Mierla <miconda at gmail.com>
wrote:

> Do you run with high debug value (lot of log messages)? Because I don't
> get similar results to yours. Maybe you can share full kamailio.cfg and lua
> script for both cases.
>
> Cheers,
> Daniel
> On 12.11.19 22:11, GG GG wrote:
>
> Hello,
>
> I removed KSR.x.exit() and I got same results for cpu usage and Recv-Q.
>
> On Tue, Nov 12, 2019 at 3:56 PM Daniel-Constantin Mierla <
> miconda at gmail.com> wrote:
>
>> Hello,
>>
>> can you remove the KSR.x.exit() and test again? It will be the same
>> effect from sip routing point of view, just to see what is the result.
>>
>> Because Lua 'exit' cannot be used, KSR.x.exit() is a workaround relying
>> on error/exception handling with string comparison that I did.
>>
>> However, overall KSR.x.exit() alone has an insignificant effect on a
>> production configuration, based on the tests I did for kamailio 5.2, you
>> can look for more at:
>>
>>   - https://www.kamailio.org/wiki/kemi/performance-tests/5.2.x
>>
>> Cheers,
>> Daniel
>> On 12.11.19 21:28, GG GG wrote:
>>
>> Hi Daniel,
>>
>> For lua example, it's just an error when writing my email... in my config
>> file I have KSR.x.exit();
>> I have not tested a more complex config, but I'm curious about kemi
>> framework and how it works. So before anything else I made a simple test to
>> know the cpu overhead.
>> For this test, I noticed that the Recv-Q of kamailio remains high with
>> kemi/lua, and with the native one remains to 0, with children=1 of course.
>> Next step, is to use a more complex config file.
>>
>> On Tue, Nov 12, 2019 at 3:00 PM Daniel-Constantin Mierla <
>> miconda at gmail.com> wrote:
>>
>>> Hello,
>>>
>>> is it really just 'exit' in the ksr_core_received()? Because that should
>>> shut down kamailio.
>>>
>>> Anyhow, practically with the examples here, you test the difference
>>> between looking up a function and doing exit in native kamailio.cfg and lua
>>> script, which is really marginal comparing with the rest of configuration
>>> file in a usual production deployment. Have you tested with a more complex
>>> set of actions/functions?
>>>
>>> Cheers,
>>> Daniel
>>> On 12.11.19 17:36, GG GG wrote:
>>>
>>> Hi!
>>>
>>> I just made a simple test performance between native script and kemi/lua
>>> with the event_route[core:msg-received] callback.
>>>
>>> # lua script children=1 cpu.process=100%
>>> function ksr_core_received()
>>>   exit;
>>> end
>>>
>>> # native script children=1 cpu.process=70%
>>> event_route[core:msg-received] {
>>>   exit;
>>> }
>>>
>>> # tested with udp 5060, 1000 Mbits/sec
>>> iperf -c 127.0.0.1 -p 5060 -u -b1000m
>>>
>>> I don't know if it's normal and what we should expect from kemi, but I
>>> would like to share this with you. Maybe someone could confirm the
>>> performance difference.
>>>
>>> Have a good day !
>>>
>>> _______________________________________________
>>> Kamailio (SER) - Users Mailing Listsr-users at lists.kamailio.orghttps://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>> --
>>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>>> Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com
>>>
>>> --
>> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
>> Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com
>>
>> --
> Daniel-Constantin Mierla -- www.asipto.comwww.twitter.com/miconda -- www.linkedin.com/in/miconda
> Kamailio World Conference - April 27-29, 2020, in Berlin -- www.kamailioworld.com
>
>
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