[SR-Users] 100% CPU usage after NTP date update

Daniel-Constantin Mierla miconda at gmail.com
Thu Oct 22 10:50:17 CEST 2015


can you do 'top' and see what is the pid of the process using a lot of
cpu, then get the backtrace with gdb?

gdb /path/to/kamailio PID
bt full

It will help to see what kamailio is trying to do.


On 22/10/15 10:45, Stefan Kohlhauser wrote:
> Hello everyone!
> Setup:
> I am currently using a Kamailio 4.2.3 on an embedded device (low CPU and RAM). The device is not able to store the current date, so after a reboot its 1. Jan 1970 until NTP updates the date.
> Problem:
> If the date is updated after the Kamailio has started (a leap of 45 years) the Kamailio uses up all the CPU and renders the device useless for a very long time.
> Notes:
> There are no incomming requests at the time. (But the Kamailio is not responsive during that time anyway.)
> Adjusting the internal Kamailio-time seems to take longer when the date update leap is bigger.
> My questions:
> 1) Can I prevent the Kamailio from using up the entire CPU after a date update? Or maybe do the internal ticks-update more gracefully?
> 2) For my better understanding: What happens within the Kamailio after adjust_ticks has updated the internal date?
> Thanks in advance for your help!
> Best regards,
> Stefan
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Daniel-Constantin Mierla
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda
Book: SIP Routing With Kamailio - http://www.asipto.com

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