LAN network performance issues

[jcv]

Hi - I am seeing some strange IPERF results.. Everything goes through my 
WIFI/GIGABIT router.

For these tests everything is plugged directly into the router via 
Ethernet cable.

My issue is the transfer rate from Windows to FreeBSD.

There are 3 different computers in this lab running 3 different OS.

Here are the results:



FreeBSD as server:

[vic at yeaguy ~] iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------


[  4] local 192.168.1.3 port 5001 connected with 192.168.1.8 port 52505
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.1 sec   157 MBytes  131 Mbits/sec <----- WINDOWS 8.1 as 
client on same LAN/ROUTER




[  5] local 192.168.1.3 port 5001 connected with 192.168.1.12 port 60926
[  5]  0.0-10.0 sec  1.10 GBytes   941 Mbits/sec <------ MACBOOK PRO as 
client on same LAN/ROUTER


Windows as the server:

------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[  4] local 192.168.1.8 port 5001 connected with 192.168.1.3 port 60529
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  1014 MBytes   850 Mbits/sec <--------- Freebsd 10 as 
client on same LAN/ROUTER



[  4] local 192.168.1.8 port 5001 connected with 192.168.1.12 port 60933
[  4]  0.0-10.0 sec  1.08 GBytes   931 Mbits/sec <------ MACBOOK PRO as 
client on same LAN/ROUTER



Macbook Pro as the server:

[  3] local 192.168.1.8 port 52509 connected with 192.168.1.12 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec   823 MBytes   690 Mbits/sec <------ WINDOWS 8.1 as 
client on same LAN/ROUTER

[  3] local 192.168.1.3 port 23190 connected with 192.168.1.12 port 5001
[ ID] Interval       Transfer     Bandwidth
[  3]  0.0-10.0 sec  1016 MBytes   852 Mbits/sec <------ Freebsd 10 as 
client on same LAN/ROUTER


With FreeBSD being the server, Windows transfer to FreeBSD is slow, 
compared to Macbook to FreeBSD transfer..
With Windows as the server, FreeBSD and Macbook to Windows transfer is 
great.
With Macbook as server, Windows and FreeBSD transfer is good.

The only bad transfer is Windows to FreeBSD. Windows transfer to Mac is 
good. Cant really blame Windows for the poor transfer to FreeBSD then. 
Macbook to FreeBSD is outstanding, cant really blame FreeBSD for poor 
receive performance.


I am on version:

FreeBSD 10.0-RELEASE #0 r260789: Thu Jan 16 22:34:59 UTC 2014 
root at snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC