Vijay,
It is a long time since I used SIPp but I do remember having similar issues. My
memory is that FD_SETSIZE is compiled into the standard library and limits the
number of FD (file descriptors) you can use. Given a few standard FD your 508
is about right if each call is using two FD.
So the next step is to use multiple processes, each using 1024 FD which will
take you nearer the ulimit, although you will find that each FD (socket in the
network interface) consumes kernel resources and the real limit is lower. The
practical limit was actually different for different kernel builds - eventually
we came to the conclusion that we were fighting the search time to find the
socket in the list of sockets. Recent Linux builds may be better, I don't know.
I did consider rebuilding the standard library to get a bigger FD_SETSIZE but
because that is also the array size passed by select(), I would probably have
to do the kernel as well and gave the idea up.
Peter
From: vg...@ctigroup.com
To: r...@rkd.me.uk
Date: Tue, 28 Jan 2014 22:46:27 +0000
CC: sipp-users@lists.sourceforge.net
Subject: [Sipp-users] rtp for only 508 calls
Hi Rob,
I am using SIPp v3.4-beta2 with rtp stream.
When I am running calls more than 508 say 600 calls I am seeing rtp for only
508 calls and not seeing rtp for the rest of the calls.
I did set the ulimit to more than 1024 as shown below
Ulimit –n 99999
But when running the sipp I see the following
Warning: open file limit > FD_SETSIZE; limiting max. # of open files to
FD_SETSIZE = 1024
Is there any limit in sipp that’s causing the rtp limited to 508 calls?
Regards,
Vijay.
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