Help with improving mysql performance on 6.2PRE

[Jerry Bell]

I have a Dell PE2950 with 2 dual core 3.73Ghz processors and 4G of ram. 
I've looked through some of the lists here and have seen super-smack
results in the 42k qps range on a 2 dual core opteron system.  I'm able to
get up to about 34k with the wide at the back of my server whilest rubbing
the side of it.

Here's what I've done:
built both mysql 5.0 and 5.1 from ports with build_static and
optimazations on.
changed the clock to TSC

added the following to my /etc/libmap.conf file:
[mysqld]
libc_r.so.5             libthr.so.2
libc_r.so.6             libthr.so.2
libthr.so.2             libthr.so.2
libpthread.so.1         libthr.so.2
libpthread.so.2         libthr.so.2

And this is about the best result I get:
2950# super-smack -d mysql select-key-mysql.smack 10 10000
Query Barrel Report for client smacker1
connect: max=200ms  min=0ms avg= 20ms from 10 clients
Query_type      num_queries     max_time        min_time        q_per_s
select_index    200000  0       0       34440.88


Are there any other optimizations I need to do to mysql or freebsd?  I'm
still not 100% convinced that I've done everything I need to use libthr
instead of libpthread.

I expected the 2950 to be a bit closer to the 1.8Ghz opteron discussed
here:
http://article.gmane.org/gmane.os.freebsd.performance/1137/match=mysql
Realistically, there's probably a bit of a performance advantage in the
opteron, but I wouldn't expect it to be that large.

Thanks!

Jerry