When running in a VM:
root@freebsd:/usr/home/jbondc # rsyslogd -v
rsyslogd 7.4.4, compiled with:
        FEATURE_REGEXP:                         Yes
        FEATURE_LARGEFILE:                      Yes
        GSSAPI Kerberos 5 support:              No
        FEATURE_DEBUG (debug build, slow code): No
        32bit Atomic operations supported:      Yes
        64bit Atomic operations supported:      Yes
        Runtime Instrumentation (slow code):    No
        uuid support:                           No

I get 100% CPU usage on every boot, same issue as here:
http://kb.monitorware.com/high-cpu-usage-after-reboot-freebsd-t11973.html

Both on FreeBSD 9.2-RELEASE, and FreeBSD 10-BETA3

It looks like an issue with /dev/console  and rsyslogd, this fixes it:
#*.err;kern.warning;auth.notice;mail.crit        /dev/console

I broke it down to:
kern.warning;auth.notice;mail.crit        /dev/console
*.err                                                                
/var/log/err.log

root@freebsd:/usr/home/jbondc # vi /var/log/err.log
2013-12-10T20:40:29.152512-05:00 freebsd rsyslogd: imudp: cannot set thread 
scheduling policy, pthread_setschedparam() not available

So it looks like rsyslogd tries to write that message as it loads to 
/dev/console and it goes nuts

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