Performance Issue at MS Windows
https://www-304.ibm.com/support/docview.wss?uid=swg21295167
http://support.microsoft.com/kb/951037
Current Status
netsh int tcp show global
Disabling Receive Side Scaling (RSS)
netsh int tcp set global rss=disabled
Disabling TCP Chimney Offload
netsh int tcp set global chimney=disabled
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
b. Add a new DWORD value named DisableTaskOffload and set it to 1.