6–Linux Driver Software
Setting Values for Optional Properties
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83840-546-00 N
sq_size
Use th
e sq_size
parameter to choose send queue size for offloaded
connections and SQ size determines the maximum SCSI commands that can be
queued. SQ size also has a bearing on the quantity of connections that can be
offloaded; as QP size increases, the quantity of connections supported
decreases. With the default values, the adapters can offload 28 connections.
Default:
128
Range:
32
to
128
Note that Cavium validation is limited to a power of 2; for example,
32
,
64
, and
128
.
rq_size
Use the
rq_size
parameter to choose the size of asynchronous buffer queue
size per offloaded connections. RQ size is not required greater than 16 as it is
used to place iSCSI ASYNC/NOP/REJECT messages and SCSI sense data.
Default:
16
Range:
16
to
32
Note that Cavium validation is limited to a power of 2; for example,
16
or
32
.
event_coal_div
The
event_coal_div
(event coalescing divide factor) parameter
is a
performance-tuning parameter that moderates the rate of interrupt generation by
the iSCSI firmware.
Default:
2
Valid values:
1
,
2
,
4
,
8
last_active_tcp_port
The
last_active_port
parameter is a status parameter that indicates the last
TCP port number used in the iSCSI offload connection.
Default: N/A
Valid values: N/A
This parameter is read-only.
event_coal_min
The
event_coal_min
parameter controls the minimum rate of interrupt
generation by the iSCSI firmware.
