[Serusers] TCP high load problems

[Klaus Darilion]

Hi!

Scenario: sipp sends INVITE to ser, ser replies with 404. sipp sends 
3000 INVITEs per second with TCP. sipp + ser on the same machine, 
packets will be snet over loopback device.

Suddenly ser reports a bad message:

Jul 26 16:39:31 t4000 ser[14152]: ERROR:parse_first_line: method not 
followed by SP

Jul 26 16:39:31 t4000 ser[14152]: ERROR:parse_first_line: bad message
  > rtpmap:0 PCMU/8000 087637 IN IP4 83.136.32.91sg: 
message=<p at 83.136.32.91:5066>;tag=6688

Jul 26 16:39:31 t4000 ser[14152]: ERROR: receive_msg: parse_msg failed


Although the message captured looks fine:

INVITE sip:service at 83.136.32.91:5060 SIP/2.0
Via: SIP/2.0/TCP 83.136.32.91:5066;branch=z9hG4bK-6688-0
From: sipp <sip:sipp at 83.136.32.91:5066>;tag=6688
To: sut <sip:service at 83.136.32.91:5060>
Call-ID: 6688-14331 at 83.136.32.91
CSeq: 1 INVITE
Contact: sip:sipp at 83.136.32.91:5066
Max-Forwards: 70
Subject: Performance Test
Content-Type: application/sdp
Content-Length:  135

v=0
o=user1 53655765 2353687637 IN IP4 83.136.32.91
s=-
c=IN IP4 83.136.32.91
t=0 0
m=audio 6002 RTP/AVP 0
a=rtpmap:0 PCMU/8000


Any hints for the problem debugging?

thanks
klaus