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3: Operating the Adapter Changing the Configuration Troubleshooting Configuration changes for Ethernet devices drivers are made by means of the ethtool(8) command. The ethtool command works with all Linux Ethernet drivers. In general, each feature has a query and a modify variant. If you are wondering whether the current driver and ethtool support a specific feature, attempt to run the query option first, an example is, as follows: # ethtool -a eth0 Pause parameters for eth0: Autonegotiate: on RX: on TX: on This shows the current settings of the pause (or flow control) parameters. You can then change these parameters with the ethtool -A option. As with any system configuration changes, make sure to have a back out strategy, read the most recent documentation for potential changes and pitfalls, and consult with a relevant Linux archives for examples of common usage. The following standard Linux commands are useful with any Ethernet device: • ethtool(8) • ifconfig(8) • ip(8) For more information, see the man page associated with each tool. 18 007-5476-001
Chapter 4 4. Performance Tuning The Network Interface Card (NIC) driver for the SGI 10-Gigabit Ethernet Adapter II allows performance tuning in the following three major areas: • “Load Balancing the Receive Activity Among CPUs” on page 20 • “Latency/Throughput Tuning” on page 20 • “NIC Acceleration Features” on page 21 • “Software (SW) Stack Tuning” on page 21 • “Further Tuning with a Sample Script” on page 22 Note: Many of the tuning techniques described in this chapter require the cxgbtool (8), which can be obtained directly from Chelsio Communications, Inc. See the following website: http://www.service/chelsio.com/ 007-5476-001 19
Page 1 and 2: SGI ® 10-Gigabit Ethernet Adapter
Page 3: Canadian Department of Communicatio
Page 7 and 8: Contents Figures . . . . . . . . .
Page 9: Figures Figure 1-1 SGI 10-Gigabit E
Page 13 and 14: Important Information ! ! About Thi
Page 15 and 16: About This Book • SGI Altix 450 S
Page 17: Product Support Reader Comments Abo
Page 20 and 21: 1: Features and Capabilities Adapte
Page 22 and 23: 1: Features and Capabilities Cablin
Page 24 and 25: 1: Features and Capabilities Copper
Page 27 and 28: Chapter 2 Installing the Adapter 2.
Page 29 and 30: Connecting with a Fiber-Optic Cable
Page 31 and 32: Copper connector Figure 2-2 Connect
Page 33 and 34: Chapter 3 Verifying Functionality 3
Page 35: Verifying That the Adapter Is Prope
Page 39 and 40: The following entry dumps the curre
Page 41 and 42: Glossary acknowledge (Ack) packet T
Page 43 and 44: C Index cabling copper, 6, 12 fiber

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