Dell Emulex Family of Adapters - Manual (Page 865)

Emulex Drivers Version 10.2 for Linux User Manual P010081-01A Rev. A
3. Configuration
LPFC Driver Performance Tuning
865

restart - The restart command stops the fcauthd daemon and then restarts it.

condrestart - The conditional restart command checks the status of the fcauthd
daemon. If it is running, it issues a stop and then a start command. If the
fcauthd daemon is not running, nothing happens.
lpfc_enable_auth Module Parameter
Use the lpfc_enable_auth module parameter to enable or disable authentication
support. This module parameter can be set when the LPFC driver is loaded to enable or
disable authentication on all Emulex adapters in the system, or it can be set
dynamically after the LPFC driver is loaded to enable or disable authentication for each
port (physical and virtual). The default setting for the lpfc-enable-auth module
parameter is disabled. See “Dynamic FC and FCoE Driver Parameters” on page 826.
Authentication Configuration Parameters
You can configure each port’s authentication parameters using the OneCommand
Manager application. See the latest OneCommand Manager Application User Manual.
Setting Remote and Local Passwords
You can configure each port’s password using the OneCommand Manager application.
See the latest OneCommand Manager Application User Manual.
LPFC Driver Performance Tuning
Overview
The RHEL6.x/SLES11-SPx LPFC drivers include the following configurable parameters
that can enhance performance:

lpfc_fcp_io_channel

lpfc_fcp_io_sched

lpfc_fcp_imax
These features are available through module parameters that are defined in the lpfc
driver as well as sysfs entries defined by the Linux kernel.
In addition, you can use the lpfc_vector_map.sh script to map a specific I/O channel to
a specific CPU. Determination of the mapping of the I/O channel to a specific CPU is
also handled by the driver.
This section provides more information about how the tuning parameters and script
can improve Emulex adapter performance.
lpfc_fcp_io_channel
The lpfc_fcp_io_channel module parameter can be configured at driver load time. It
defines the number of I/O channels supported by the driver. The driver is capable of