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*		Please read			    *
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There are some known issues with FreeBSD's libpthread 
implementation and APR that can affect throughput at 
high volume. A possible fix is to use libmap.conf to 
remap FreeSWITCH. and its libraries to use libthr 
(the better performance threading library)

/etc/libmap.conf

[freeswitch]
libc_r.so.5 libthr.so.2
libc_r.so.6 libthr.so.2
libpthread.so.1 libthr.so.2
libpthread.so.2 libthr.so.2