[Asterisk-Users] strange performance issue

[Roy Sigurd Karlsbakk]

hi

i just setup a test with asterisk 1.2 to see how many concurrent  
calls it could handle, and I came across something quite strange;  
with ~1000 calls between two asterisk servers, generated with

[looptest]
exten => _X.,1,GotoIf($[ ${EXTEN} > 1000 ]?pickup:dial)
exten => _X.,n(pickup),Answer
exten => _X.,n,Echo
exten => _X.,n(dial),Dial(SIP/looptest/$[ ${EXTEN} + 1])

...ping-pong dialing beween two servers. On one of the servers,  
system- and user load was low and fine, but on the other, system load  
was around 50%(!). After a little headscratching and debugging, i  
found this from oprofile: http://pastebin.ca/39007, and mr Underwood  
asked me if I was seeing excessive network traffic. The box has two  
NICs, and one of them is connected to a 'mirror' port on the cisco  
switch, spewing all traffic from all ports into there. So, yes, I  
keep seeing lots of traffic. But then, problem still persists after  
'ifconfig eth1 down'. I yet haven't had the possibility to unplug the  
cable, as the server is at the server farm, but I'll try tomorrow.

Anyway, given that the problem is directly related to the traffic,  
does anyone know how i can avoid this problem _without_ just  
unplugging the other NICs cable?


Best regards

Roy Sigurd Karlsbakk
roy at karlsbakk.net
---
In space, loud sounds, like explosions, are even louder because there  
is no air to get in the way.