ML370 G4 with poor Network Performance and high CPU Load

[rene at reckschwardt.de]

  Hello,

i am new in this Maillist and i use an ML370G4 with FreeBSD 8.1 AMD64. I 
try with netio and TCP. The used Nics are onboard Broadcom 
(PCI-X133Mhz), an Broadcom PCI-X Nic and an intel PCI-X Nic. The CPU 
load is around 35% and the performance like this:

Packet size  1k bytes:  99303 KByte/s Tx,  44576 KByte/s Rx.
Packet size  2k bytes:  72043 KByte/s Tx,  75200 KByte/s Rx.
Packet size  4k bytes:  23280 KByte/s Tx,  66072 KByte/s Rx.
Packet size  8k bytes:  55234 KByte/s Tx,  64470 KByte/s Rx.
Packet size 16k bytes:  82485 KByte/s Tx,  74099 KByte/s Rx.
Packet size 32k bytes:  93133 KByte/s Tx,  74992 KByte/s Rx.

I try the following tuning:

kern.ipc.maxsockbuf=16777216
net.inet.tcp.sendbuf_max=16777216
net.inet.tcp.recvbuf_max=16777216
net.inet.tcp.sendbuf_inc=16384
net.inet.tcp.recvbuf_inc=524288
net.inet.tcp.inflight.enable=0
net.inet.tcp.hostcache.expire=1

but this is not helpfull, the Load goes to 60% and the Performance is 
also poor. How can i prevent this Problem?

thanks for response ré


P.S. the same Computer with Linux runs perfect with Performance and 1-2% 
Load,