Chelsio Communications Chelsio T4, Installation And User Manual

Page: 249 / 511

XIX. Traffic Management
Chelsio T5/T4 Unified Wire for Linux
Page 249
1. Introduction
Traffic Management capabilities built-in to Chelsio T5/T4 CNAs can shape transmit data traffic
through the use of sophisticated queuing and scheduling algorithms built-in to the ASIC
hardware which provides fine-grained software control over latency and bandwidth parameters
such as packet rate and byte rate. These features can be used in a variety of data center
application environments to solve traffic management problems.
Traffic Management features in Chelsio
‘s adapters allows the user to control three main things:

Guarantee low latency in the presence of other traffic

Control max bandwidth that a connection or a flow (a group of connections) can use

Allocate available bandwidth to several connection or flows based on desired levels of
performance
Once the offload transmit traffic shaping classes have been configured, individual offloaded
connections (flows) may be assigned to a traffic shaping class in order to manage the flows
according to the class configuration. The mechanism to accomplish this "flow to class" mapping
assignment is the Connection Offload Policy (COP) configuration system.
1.1. Hardware Requirements
1.1.1. Supported Adapters
The following are the currently shipping Chelsio Adapters that are compatible with the Traffic
Management feature.
T520-BT
T580-CR
T520-LL-CR
T520-CR
T580-LP-CR
T420-CR
T440-CR
T422-CR
T404-BT
T420-BCH
T440-LP-CR
T420-BT
T420-LL-CR
T420-CX