Allied Telesis AT-2973T (NetExtreme II) - Manual (Page 62)

Chapter 5: 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
offloaded 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 offloaded; as QP size increases, the
number of connections supported decreases. With the default values, the
AT-2973SX and AT-2973T adapters 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 offloaded 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