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Chapter X. FCoE PDU Offload Target

Chelsio T5/T4 Unified Wire For Linux Page 173

3.6. Removing LUNs

Execute the following command to remove the LUNs from the configuration file:

[root@host] # scstadmin –force -clear_config < LUN Config file >

3.7. Performance tuning

For Performance tuning, enable hyperthreading and bind chfcoe workers and irqs to different

CPUs.

For irq binding to work, irqbalance service should be disabled in the system. Follow the steps

mentioned below to do so:

[root@host]# chkconfig --list irqbalance

irqbalance 0:off 1:off 2:on 3:on 4:on 5:on 6:off

[root@host]# chkconfig irqbalance off

[root@host]# service irqbalance stop

Stopping irqbalance: [ OK ]

Examples:

 In this example 16 CPUS are enabled with hyperthreading in a single NUMA node. You

can choose 12 CPUs for workers and remaining (4) for irqs.

If hyperthreading is enabled, use both thread siblings of a core for binding either workers or irqs.

[root@host]# cat /sys/devices/system/cpu/cpu0/topology/threads_siblings_list

0,16

Use both 0 and 16 CPUs for either workers or irqs.

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 459 460

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Chelsio Communications Chelsio T5 Guía de usuario Pagina 173

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