[u]Server[/u]:
OpenSolaris snv_82 (I upgraded since first post hoping it would help... it 
didn't)
AMD 690v chipset
AMD Athlon 64 X2 4000+
1 GB RAM
Onboard Realtek ethernet (Realtek 8101E, rge driver)
4 500GB Seagate SATA 7200.10 in RAID-Z zpool

[u]Clients[/u]:
Gentoo workstation, kernel 2.6.23
Windows XP MCE 2005

The network is pretty simple, I have a Net BSD router serving up IPs to these 
machines, and they're all sitting on the same 10/100 switch.

I made two snoop logs, but they're pretty big, so I've included links to gzip'd 
versions (the attachment thingy wasn't behaving in Safari).  My procedure for 
generating them was as follows:

First, I started snoop on the server, redirecting the output to my first snoop 
log (snoop1.log).  On the Linux machine, I mounted the CIFS share, then started 
a file copy from the share to my local home directory.  Speed was about 200 
KB/s (a mysterious improvement, but still pathetic).  I let the copy run for 
several seconds, then stopped the snoop.

At this point, I started snoop again, this time redirecting output to my second 
snoop log (snoop2.log).  After starting this snoop, I started a second file 
copy from the share to my local home directory.  The first copy was still going 
when I started the second copy.  As soon as I started the second copy, transfer 
speeds on both copies shot up to about 5 MB/s, saturating my available network 
bandwidth.  I let the second copy finish, and as soon as it had, transfer speed 
on the first copy dropped to about 200 KB/s.  I then stopped snoop.

The first log is about 4 KB compressed, 400 KB uncompressed.  The second is 70 
KB compressed, 9 MB uncompressed.

http://www-personal.ksu.edu/~tcm/snoop1.log.gz
http://www-personal.ksu.edu/~tcm/snoop2.log.gz

I've done a little bit of fiddling with dtrace at work... if someone can give 
me some pointers, I may be able to spit out some more helpful information.  As 
it is, I wouldn't really know where to start.
 
 
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