10G 이상에서 생각해볼 옵션들
1Gbit /Sec 에 근처도 가지 않는다면 모든 옵션을 disable 하고 그 이상의 패킷이 발생하고 이 패킷처리가 특정 cpu core 에 몰린다면 적용 해볼만한 옵션들이다.
TCP Chimney Offload
This feature transfers TCP/IP protocol processing from the CPU to a network adapter during network data transfer.
CPU -> NIC 로 변경
Receive Side Scaling
This feature enables the network load from a network adapter to be distributed across multiple CPUs in a multiprocessor computer.
하나의 Core -> 여러 Core 로 분산
NetDMA
This feature provides services for offloading the memory copy operation that is performed by the networking subsystem to a dedicated direct memory access (DMA) engine when receiving network packets.
패킷수신시 DMA 사용
TOE 란
http://en.wikipedia.org/wiki/TCP_offload_engine
H/W 와 OS 가 동시에 지원해야 함
상태확인
netsh interface tcp show global
netstat -nt | findstr /i offloaded
netstat -nt
Netsh int tcp show chimneystats
Netsh int tcp show chimneystats 3
등등의 조합
상태변경
netsh int tcp set global rss=enabled
netsh int tcp set global rss=disabled
netsh int tcp set global chimney=enabled
netsh int tcp set global chimney=disabled
강제설정변경
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
읽을만한 KB
http://support.microsoft.com/kb/942861/en-us
http://support.microsoft.com/kb/936594/en-us
http://blogs.technet.com/b/wincat/archive/2012/08/27/using-powershell-for-nic-configuration-tasks.aspx
http://sqltouch.blogspot.kr/2013/03/tcp-chimney-offloads-and-sql-server.html
http://blogs.msdn.com/b/sql_protocols/archive/2008/05/20/connectivity-troubleshooting-in-sql-server-2008-with-the-connectivity-ring-buffer.aspx
