Cisco 7008P - SFS InfiniBand Server Switch Manual do Utilizador descarregar pdf (Página 10)

Sources of overhead in Datacenter

Servers

CPU

NIC

System

Memory

TCP

Buffer

Pool

App

Buffer

TCP/IP

h/w

s/w

Kernel

User

40%Transport Processing

Application Context

Switches

Intermediate Buffer

Copying

Sources of Overhead in

Server Networking

40%

20%

CPU

Overhead

Solutions for Overhead in Server Networking

Transport Offload Engine (TOE)

Moves Transport processor cycles to the NIC

Moves TCP/IP protocol stack buffer copies

from system memory to the NIC memory

RDMA

Eliminates intermediate and application buffer copies

(memory bandwidth consumption)

Kernel Bypass – direct user-level access to hardware

Dramatically reduces application context switches

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Cisco 7008P - SFS InfiniBand Server Switch Manual do Utilizador Página 10