[Kamailio-Users] UDP packet loss

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Alex R.S.M

11 Feb 2009 11 Feb '09

4:51 p.m.

Hi, I am performing SIP to SIP performance testing using Kamailio proxy (UAC-Kamailio-UAC). After increasing the load to 300 calls/sec Kamailio begins dropping UDP packets. (250 cps works fine). CPU utilization and network bandwidth looks fine. I think the bottleneck is the Linux UDP buffer size of the proxy server. Here is the proxy server information: $ uname -a Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC 2008 x86_64 GNU/Linux $ sudo sysctl -a | grep net.core.rmem_max net.core.rmem_max = 131071 The question is if I increase the linux UDP buffer size do I need to change any configuartion parameter (like MAX_RECV_BUFFER_SIZE) in Kamailio? Thanks, Alex R _________________________________________________________________ Windows Live™: Keep your life in sync. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022…

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Daniel-Constantin Mierla

11 Feb 11 Feb

5:21 p.m.

Hello, On 02/11/2009 04:51 PM, Alex R.S.M wrote:

...

kamailio autodetects and sets the buffer size to the maximum allowed. What are the number of children you have in config? Do you get any error messages in the syslog? Cheers, Daniel

...

$ uname -a Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC 2008 x86_64 GNU/Linux $ sudo sysctl -a | grep net.core.rmem_max net.core.rmem_max = 131071 The question is if I increase the linux UDP buffer size do I need to change any configuartion parameter (like MAX_RECV_BUFFER_SIZE) in Kamailio? Thanks, Alex R ------------------------------------------------------------------------ Windows Live™: Keep your life in sync. See how it works. <http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022009> ------------------------------------------------------------------------ _______________________________________________ Kamailio (OpenSER) - Users mailing list Users(a)lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users

-- Daniel-Constantin Mierla http://www.asipto.com

Alex R.S.M

5:43 p.m.

hello

...

What are the number of children you have in config?

fork=yes children=4

...

Do you get any error messages in the syslog?

not getting any error message in /var/log/syslog Thanks, Ali

...

Date: Wed, 11 Feb 2009 17:21:46 +0200 From: miconda(a)gmail.com To: alex_rsm(a)hotmail.com CC: users(a)lists.kamailio.org Subject: Re: [Kamailio-Users] UDP packet loss Hello, On 02/11/2009 04:51 PM, Alex R.S.M wrote:

kamailio autodetects and sets the buffer size to the maximum allowed. What are the number of children you have in config? Do you get any error messages in the syslog? Cheers, Daniel

-- Daniel-Constantin Mierla http://www.asipto.com

_________________________________________________________________ Windows Live™: E-mail. Chat. Share. Get more ways to connect. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_allup_explore_022009

Daniel-Constantin Mierla

6:26 p.m.

Hello, On 02/11/2009 05:43 PM, Alex R.S.M wrote:

...

hello

What are the number of children you have in config?

fork=yes children=4

this is a bit low if you want to manage high traffic. Try with children=16 and see how the results are. Cheers, Daniel

...

Do you get any error messages in the syslog?

not getting any error message in /var/log/syslog Thanks, Ali

kamailio autodetects and sets the buffer size to the maximum allowed. What are the number of children you have in config? Do you get any

error

messages in the syslog? Cheers, Daniel > > $ uname -a > Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC

2008

> x86_64 GNU/Linux > > $ sudo sysctl -a | grep net.core.rmem_max > net.core.rmem_max = 131071 > > > The question is if I increase the linux UDP buffer size do I need to > change any configuartion parameter (like MAX_RECV_BUFFER_SIZE) in > Kamailio? > > Thanks, > Alex R > > >

------------------------------------------------------------------------

> Windows Live™: Keep your life in sync. See how it works. >

<http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022009>

> >

------------------------------------------------------------------------

_______________________________________________ Kamailio (OpenSER) - Users mailing list Users(a)lists.kamailio.org http://lists.kamailio.org/cgi-bin/mailman/listinfo/users http://lists.openser-project.org/cgi-bin/mailman/listinfo/users

-- Daniel-Constantin Mierla http://www.asipto.com

------------------------------------------------------------------------ Windows Live™: E-mail. Chat. Share. Get more ways to connect. Check it out. <http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_allup_explore_022009>

-- Daniel-Constantin Mierla http://www.asipto.com

Alex R.S.M

13 Feb 13 Feb

11:17 p.m.

Hi, As I mentioned in my previous email I am performing SIP to SIP performance testing using Kamailio proxy (UAC-Kamailio-UAC). After increasing the load to 300 calls/sec, Kamailio begins dropping UDP packets. (250 cps works fine). CPU utilization and network bandwidth looks fine. - UDP packet size on the Linux server is increased to 8M: net.core.rmem_max = 8388608 - the number of children used in Kamailio config increased to 16: fork=yes children=16 Here is there error I am getting in /var/log/syslog file: Feb 13 15:17:39 lab-linux01 /sbin/kamailio[12014]: ERROR:tm:new_t: out of mem Feb 13 15:17:39 lab-linux01 /sbin/kamailio[12014]: ERROR:tm:t_newtran: new_t failed Feb 13 15:17:39 lab-linux01 /sbin/kamailio[12024]: ERROR:tm:new_t: out of mem Feb 13 15:17:39 lab-linux01 /sbin/kamailio[12024]: ERROR:tm:t_newtran: new_t failed I am using 64M for the memory size (/etc/default/kamailio) # Amount of memory to allocate for the running Kamailio server (in Mb) MEMORY=64 Does it mean I need to increase this value? Thanks,

...

Date: Wed, 11 Feb 2009 18:26:49 +0200 From: miconda(a)gmail.com To: alex_rsm(a)hotmail.com CC: users(a)lists.kamailio.org Subject: Re: [Kamailio-Users] UDP packet loss Hello, On 02/11/2009 05:43 PM, Alex R.S.M wrote:

hello

What are the number of children you have in config?

fork=yes children=4

this is a bit low if you want to manage high traffic. Try with children=16 and see how the results are. Cheers, Daniel

Do you get any error messages in the syslog?

not getting any error message in /var/log/syslog Thanks, Ali

kamailio autodetects and sets the buffer size to the maximum allowed. What are the number of children you have in config? Do you get any

error

messages in the syslog? Cheers, Daniel > > $ uname -a > Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC

2008

------------------------------------------------------------------------

> Windows Live™: Keep your life in sync. See how it works. >

<http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022009>

> >

------------------------------------------------------------------------

-- Daniel-Constantin Mierla http://www.asipto.com

_________________________________________________________________ Windows Live™: Keep your life in sync. http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022…

Daniel-Constantin Mierla

11:24 p.m.

Hello, On 02/13/2009 11:17 PM, Alex R.S.M wrote:

...

Yes, you run out of share memory. Increase the value of MEMORY variable (it translates into -m command line option). Cheers, Daniel

...

Thanks,

hello

What are the number of children you have in config?

fork=yes children=4

this is a bit low if you want to manage high traffic. Try with children=16 and see how the results are. Cheers, Daniel > > > Do you get any error messages in the syslog? > not getting any error message in /var/log/syslog > > > Thanks, > Ali > > > > Date: Wed, 11 Feb 2009 17:21:46 +0200 > > From: miconda(a)gmail.com > > To: alex_rsm(a)hotmail.com > > CC: users(a)lists.kamailio.org > > Subject: Re: [Kamailio-Users] UDP packet loss > > > > Hello, > > > > On 02/11/2009 04:51 PM, Alex R.S.M wrote: > > > Hi, > > > > > > I am performing SIP to SIP performance testing using Kamailio

proxy

> > > (UAC-Kamailio-UAC). After increasing the load to 300 calls/sec > > > Kamailio begins dropping UDP packets. (250 cps works fine). CPU > > > utilization and network bandwidth looks fine. I think the

bottleneck

> > > is the Linux UDP buffer size of the proxy server. Here is the

proxy

> > > server information: > > kamailio autodetects and sets the buffer size to the maximum

allowed.

> > What are the number of children you have in config? Do you get any > error > > messages in the syslog? > > > > Cheers, > > Daniel > > > > > > > > $ uname -a > > > Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC > 2008 > > > x86_64 GNU/Linux > > > > > > $ sudo sysctl -a | grep net.core.rmem_max > > > net.core.rmem_max = 131071 > > > > > > > > > The question is if I increase the linux UDP buffer size do I

need to

> > > change any configuartion parameter (like MAX_RECV_BUFFER_SIZE) in > > > Kamailio? > > > > > > Thanks, > > > Alex R > > > > > > > > > >

------------------------------------------------------------------------

> > > Windows Live™: Keep your life in sync. See how it works. > > > >

<http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022009>

> > > > > > > >

------------------------------------------------------------------------

> > > > > > _______________________________________________ > > > Kamailio (OpenSER) - Users mailing list > > > Users(a)lists.kamailio.org > > > http://lists.kamailio.org/cgi-bin/mailman/listinfo/users > > > http://lists.openser-project.org/cgi-bin/mailman/listinfo/users > > > > -- > > Daniel-Constantin Mierla > > http://www.asipto.com > > > >

------------------------------------------------------------------------

> Windows Live™: E-mail. Chat. Share. Get more ways to connect.

Check it

> out. >

<http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t2_allup_explore_022009>

-- Daniel-Constantin Mierla http://www.asipto.com

------------------------------------------------------------------------ Windows Live™: Keep your life in sync. See how it works. <http://windowslive.com/howitworks?ocid=TXT_TAGLM_WL_t1_allup_howitworks_022009>

-- Daniel-Constantin Mierla http://www.asipto.com

Henning Westerholt

11 Feb 11 Feb

5:22 p.m.

On Wednesday 11 February 2009, Alex R.S.M wrote:

...

I am performing SIP to SIP performance testing using Kamailio proxy (UAC-Kamailio-UAC). After increasing the load to 300 calls/sec Kamailio begins dropping UDP packets. (250 cps works fine). CPU utilization and network bandwidth looks fine. I think the bottleneck is the Linux UDP buffer size of the proxy server. Here is the proxy server information: $ uname -a Linux lab-linux01 2.6.24-19-server #1 SMP Wed Jun 18 14:44:47 UTC 2008 x86_64 GNU/Linux $ sudo sysctl -a | grep net.core.rmem_max net.core.rmem_max = 131071 The question is if I increase the linux UDP buffer size do I need to change any configuartion parameter (like MAX_RECV_BUFFER_SIZE) in Kamailio?

Hi Alex, we're using a bigger rmem_max size, and not increased the MAX_RECV_BUFFER_SIZE. So far we don't have any problems. :-) The UDP receiver buffer is probed during the startup of the server. Cheers, Henning

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Alex R.S.M
Daniel-Constantin Mierla
Henning Westerholt