Dell Emulex Family of Adapters - Manual (Page 873)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
Network Performance Tuning
873
Transmit/Receive Queue Statistics, on page 976.
Turning off auditing and SELinux can improve CPU utilization, and in some cases
increase throughput. You can disable auditing by appending audit=0 in the boot
command line. You can turn off SELinux by specifying selinux=0 in the boot command
line. For example, the following command boots the Linux kernel with the SELinux and
auditing options disabled:
kernel /boot/vmlinux-2.6.18 ro root=/dev/md0 selinux=0 audit=0
You can get better CPU utilization, and in some cases better throughput, by disabling
kernel debug options such as CONFIG_DEBUG_SLAB. This requires you to build the
kernel image and modules. Turning off the firewall and disabling Hyper-Threading
can also improve performance.