Hi,
I have not tried running IMS Bench SIPP with many IP per SIPP instance.
But the following scenario works for us: one IP per SIPP instance, 4 SIPP
instances, and 25K ports per SIPP instance. Hence you would need 4 IPs (or
virtual IPs). This way you can simulate 100K users per system, each users being
represented with its own IP/port combination.
As mentioned in the doc, as you use many users per system, you might have to
change UDP_HTABLE_SIZE in include/net/udp.h and rebuild the kernel of the
system running the IMS Bench SIPP, for performance reasons.
-Xavier
________________________________
From: Peter Higginson [mailto:plh...@hotmail.com]
Sent: lundi 25 octobre 2010 14:34
To: sougata....@gmail.com
Cc: sipp_users
Subject: Re: [Sipp-users] Fwd: SIPp IMS Bench : Query on Virtual IP Config on
Test System
Sougata,
It is a couple of years since I worked on this. If you want to generate traffic
apparently from 100K real users, then you need to have that traffic appear to
come from 100K different IP addresses. If you are not bothered about emulating
all the IP addresses then there is no problem - SIPp will use a small number of
IP addresses and ports and distinguish the calls using the Call-ID. You can
measure the space used per Call-ID and work out how big a machine you need to
avoid disk swapping. (We needed to go to 1G for 100K calls.)
The problems only come with large numbers of IP addresses. I mentioned some
below and also many devices have a limit of 64K on the size of the ARP table.
We ended up writing our own code to emulate being a router with lots of IP
addresses behind it. That way we only needed a few ARP entries (both for the
test device and the DUT) and we could keep a small indexed table for the IP
addresses.
Hope that helps,
Peter
________________________________
Date: Mon, 25 Oct 2010 12:48:39 +0200
Subject: Re: [Sipp-users] Fwd: SIPp IMS Bench : Query on Virtual IP Config on
Test System
From: sougata....@gmail.com
To: plh...@hotmail.com
CC: sipp-users@lists.sourceforge.net
Hi Peter ,
Can you elaborate a bit more regarding , why i need to be lucky to make this
set-up work?
I have decided to go for 1 IP address per SIPp instance. So as i want to have 2
SIPp instances , i want to have 2 virtual IP's configure on the network
interface card. This 2 SIPp instances needs to generate 100,000 users each.
As stated in my first mail , i have connected both the PC's with Cat 5 cable. I
hope this set-up works.
Btw , how did you solve this issue in your case , as you said being outside of
SIPp.?
Regards ,
Sougata
On Mon, Oct 25, 2010 at 11:52 AM, Peter Higginson
<plh...@hotmail.com<mailto:plh...@hotmail.com>> wrote:
My personal experience with the base SIPp (rather than IMS bench) is that you
will be very lucky to make this work. If you are thinking of multiple
instances, then it is fairly easy to measure the data space per instance (or
per call) and multiply it by the number of instances and see if you have enough
real memory to do that. In either case, each IP address and each UDP port has
an overhead in the OS and they will mount up. We found that Linux just slowed
to a crawl with more than 20K IP addresses and UDP ports in use. There is also
a C library limit (10K from memory) that limits the number of streams per
process (you can recompile the library but we never went there).
We did solve the problem, but outside of SIPp.
Peter
________________________________
Date: Mon, 25 Oct 2010 11:18:00 +0200
From: sougata....@gmail.com<mailto:sougata....@gmail.com>
To: sipp-users@lists.sourceforge.net<mailto:sipp-users@lists.sourceforge.net>
Subject: [Sipp-users] Fwd: SIPp IMS Bench : Query on Virtual IP Config on Test
System
HI All ,
Any SUGGESTION on my this query??
ITS A BIT URGENT..... !!!
Regards ,
Sougata
---------- Forwarded message ----------
From: sougata pal <sougata....@gmail.com<mailto:sougata....@gmail.com>>
Date: Fri, Oct 22, 2010 at 7:23 PM
Subject: [Sipp-users] SIPp IMS Bench : Query on Virtual IP Config on Test System
To: sipp-users@lists.sourceforge.net<mailto:sipp-users@lists.sourceforge.net>
Hi All ,
I want to configure multiple IP address on my Test System which will generate
traffic for near about 200,000 users for my SUT where i have installed
OpenIMSCore. Now as i see the pre-requisites in the IMS Bench SIPp installation
procedure there its written " The actual number of IP addresses to configure
will depend on the transport option you select: a single IP address per SIPp
instance, in which case you need many IP addresses as you'll run SIPp instances
on a same physical system, or multiple IP addresses per SIPp instance in which
case you will want plenty of IP addresses."
Now in my Test System i want to have 2 SIPp instances , each of whom will be
generating 100,000 users traffic.
So , now my question is which transport option will be suitable for me?
Shall i go for 1 IP address per SIPp instance , or i keep only one single SIPp
instance having 100,000 IP addresses?
Secondly , connecting both the Pc's , my TEST SYSTEM and my Desktop running
OPenIMSCore ( SUT) , i am using CAT 5 cable connector. Will that be suitable
for conencting? I have installed 2 separate network adapters for this case in
both the PC's.
Any suggestion on this scenario will be very helpful ,
Regards ,
Sougata
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