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From: "Martin Werner" <bsdml@werner.st>
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Date: Mon, 4 Sep 2006 20:22:57 +0200
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Subject: Unusual Network-Performance with outbound traffic
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Hi,

I'm running a FreeBSD 6.0-RELEASE Server with a  

fxp0: <Intel 82559ER Pro/100 Ethernet> port 0x2000-0x203f mem
0xf4120000-0xf4120fff,0xf4100000-0xf411ffff irq 9 at device 8.0 on pci1

and have some rather unusual network performance issue with outbound
traffic. Using fixed IP-Adresses, no special flags set with network
adapters.

Using regular FTP-Client putting data to another server performance is OK
(10,3MB/sec - wire limit)

Using wput with the same file and same target, throughput is 2,7MB/ec

And finally: Using a mount_smbfs mount and cp'ing the data there, we are
down to 184KB/sec

Fetching that file performance is quite OK (Regular FTP-Client: 10MB/sec,
fetch: 6,3MB/sec, cp is at 5,8MB/sec

Some parms' (all at default)

net.inet.tcp.sendspace: 32768
net.inet.tcp.recvspace: 65536
net.smb.version: 103006
net.smb.tcprcvbuf: 65535
net.smb.tcpsndbuf: 65535

Thanks in advance for any hints