From owner-freebsd-stable@FreeBSD.ORG  Thu Mar 15 10:13:37 2007
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From: "Emile Coetzee" <freebsd-stable@clarotech.co.za>
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Date: Thu, 15 Mar 2007 12:13:25 +0200
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Subject: Re: Openvpn tap uses 99% cpu time
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Hi Bruce

 

I have run a ktrace as you suggested

 

I put the following in a script /usr/local/sbin/openvpn --daemon --config
/usr/local/etc/openvpn/tapserver.conf  and called it tapserver.sh and then
used

ktrace -d -f openvpn.dump ./tapserver.sh

This captured all the information for the parent PID 1082

 

I then watched top in a second session and identified the PID (1083) of the
openvpn process that was using up the CPU time.

 

I then ran 

ktrace -p 1083 -f openvpn2.dump 

 

This produced no data at all.

 

The dump is fairly large so I have dropped it here:
http://pastebin.com/899318

If required/allowed I can post it to the list.

 

Regards

Emile