Allied Telesis AT-2872SX - page 60

Chapter 4: Installing the Linux Drivers
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modprobe bnx2i en_tcp_dack=0
Default: ENABLED
sq_size
Use the “Configure SQ size” parameter to select the send-queue size for
off-loaded connections. The SQ size determines the maximum SCSI
commands that can be queued. Also, SQ size has a bearing on the
number of connections that can be off-loaded; as QP size increases, the
number of connections supported decreases. With the default values, the
AT-2872SX ExpressCard module can offload 28 connections.
Defaults: 128
Range: 32 to 128
Note
Broadcom validation is limited to a power of 2; for example, 32, 64,
128.
rq_size
Use the “Configure RQ size” parameter to choose the size of
asynchronous buffer queue size per off-loaded connections. The RQ size
is not required to be greater than 16 because it is used to place iSCSI
ASYNC/NOP/REJECT messages and SCSI sense data.
Defaults: 16
Range: 16 to 32
Note
Broadcom validation is limited to a power of 2; for example, 16, 32.
event_coal_div
The Event Coalescing Divide Factor parameter is a performance tuning
parameter used to moderate the rate of interrupt generation by the iscsi
firmware.
Defaults: 1
Valid values: 1, 2, 4, 8
bnx2i_nopout_when_commands_active
The” iSCSI NOOP even when connection is not idle” parameter enables
the offload initiator to send iSCSI NOP-OUT on wire even when the link is
not truly idle. This parameter was introduced to avoid unnecessary