em driver testing

[ke han]

According to the 6.2-beta3 announcemetn, there are improvements to  
the em driver.

"The most important of the things that have been worked on is the
driver for em(4). "

I have a Sun X4100 which uses Intel ethernet.  I would like to  
install amd64 6.2beta3 on this server and put it through some tests.
But I have no idea what tests to run or how to run them.
Can someone provide some pointers?  I am happy to post my findings.

thanks, ke han