Removing Luns; Performance Tuning - Chelsio Communications Chelsio T5 Installation And User Manual

Chapter X. FCoE PDU Offload Target
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
[root@host]# chkconfig irqbalance off
[root@host]# service irqbalance stop
Stopping irqbalance:
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.
Chelsio T5/T4 Unified Wire For Linux
1:off 2:on 3:on 4:on 5:on 6:off
[ OK ]
Page 173