[SR-Users] siptrace retransmission's

[Grant Bagdasarian]

Hello Daniel,

I've enabled the debug only for a moment to get a better understanding of Kamailio and what was happening under the hood.

I've done some testing on a newer version of Kamailio (4.3) and didn't see this problem occur. So I'm not sure if it's also software version related.

What else needs to be tuned except for the children parameter?
Are there any guidelines/best practices in configuring the amount of child parameters?

Thanks for your answer!

Regards,

Grant

From: sr-users [mailto:sr-users-bounces at lists.sip-router.org] On Behalf Of Daniel-Constantin Mierla
Sent: Monday, January 11, 2016 5:37 PM
To: Kamailio (SER) - Users Mailing List <sr-users at lists.sip-router.org>
Subject: Re: [SR-Users] siptrace retransmission's

Hello,

I expect that the log message from sip trace means that a retransmission was detected and it is not going to be sent to sipcature server.

Printing the log messages for memory operations (malloc/free) is going to be very costly in terms of performaces, be sure that parameters memlog/memdbg are lower than debug.

Also, depending of the config various tunings may be required for increasing the perormances, such as value of children parameter.

Cheers,
Daniel
On 11/01/16 11:06, Grant Bagdasarian wrote:
Hello All,

I'm load testing Kamailio with siptrace (duplicate) enabled, but for some reason not all SIP messages are arriving at the sip capture server (kamailio instance with sipcapture).
The load is an average of 50 CPS.

I enabled debug 9 and I get the following messages.

<core> [mem/q_malloc.c:369]: qm_malloc(): qm_malloc(0x7fefde4da010, 1274) called from siptrace: siptrace.c: trace_send_hep_duplicate(1615)
<core> [mem/q_malloc.c:439]: qm_free(): qm_free(0x7fefde4da010, 0x7fefde618a88), called from siptrace: siptrace.c: trace_send_hep_duplicate(1659)
<core> [mem/q_malloc.c:439]: qm_free(): qm_free(0x7fefde4da010, 0x7fefde61ee18), called from siptrace: siptrace.c: trace_send_hep_duplicate(1660)
<core> [mem/q_malloc.c:474]: qm_free(): qm_free: freeing frag. 0x7fefde61ede8 alloc'ed from siptrace: siptrace.c: trace_send_hep_duplicate(1615)
<core> [mem/q_malloc.c:369]: qm_malloc(): qm_malloc(0x7fefde4da010, 1271) called from siptrace: siptrace.c: trace_send_hep_duplicate(1615)
<core> [mem/q_malloc.c:439]: qm_free(): qm_free(0x7fefde4da010, 0x7fefde61b488), called from siptrace: siptrace.c: trace_send_hep_duplicate(1659)
<core> [mem/q_malloc.c:439]: qm_free(): qm_free(0x7fefde4da010, 0x7fefde61e880), called from siptrace: siptrace.c: trace_send_hep_duplicate(1660)
<core> [mem/q_malloc.c:474]: qm_free(): qm_free: freeing frag. 0x7fefde61e850 alloc'ed from siptrace: siptrace.c: trace_send_hep_duplicate(1615)
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission
DEBUG: siptrace [siptrace.c:1040]: trace_onreq_out(): retransmission

In siptrace.c I see the following line of code:

                if(ps->flags&TMCB_RETR_F) {
                               LM_DBG("retransmission\n");
                               return;
                }

Does this in fact retransmit the message to the capture server?
Has anyone else load tested kamailio with siptrace on?

I'm using Kamailio 4.1. I'm also using the setflag(..) function in siptrace module to duplicate all forwarded messages to the capture server.

Regards,

Grant




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