Dell Broadcom NetXtreme Family of Adapters Betriebsanweisung PDF herunterladen (Seite 155)

User Guide NetXtreme II

September 2013

Broadcom Corporation

Document INGSRVT78-CDUM100-R Setting Values for Optional Properties Page 155

The optional parameter qs_per_cos is used to specify how many queues will share the same CoS. This parameter is

evaluated by the driver up to 3 values of 8 bits each. Each byte sets the desired number of queues for that CoS. The total

number of queues is limited by the hardware limit. For example, set qs_per_cos to 0x10101 to create a total of three queues,

one per CoS. In another example, set qs_per_cos to 0x404 to create a total of 8 queues, divided into 2 CoS, 4 queues in

each CoS.

cos_min_rate

The optional parameter cos_min_rate is used to determine the weight of each CoS for round-robin scheduling in

transmission. This parameter is evaluated by the driver as up to 3 values of 8 bits each. Each byte sets the desired weight

for that CoS. The weight ranges from 0 to 100. For example, set cos_min_rate to 0x101 for fair transmission rate between

2 CoS. In another example, set the cos_min_rate to 0x30201 to give CoS the higher rate of transmission. To avoid using

the fairness algorithm, omit setting cos_min_rate or set it to 0.

Set the multi_mode parameter to 2 as shown below to differentiate the traffic according to the VLAN PRI value.

insmod bnx2x.ko multi_mode=2 pri_map=0x11110000 qs_per_cos=0x404

modprobe bnx2x multi_mode=2 pri_map=0x11110000 qs_per_cos=0x404

Set the multi_mode parameter to 4 as shown below to differentiate the traffic according to the IP DSCP value.

insmod bnx2x.ko multi_mode=4 pri_map=0x22221100 qs_per_cos=0x10101 cos_min_rate=0x30201

modprobe bnx2x multi_mode=4 pri_map=0x22221100 qs_per_cos=0x10101 cos_min_rate=0x30201

BNX2I DRIVER

Optional parameters en_tcp_dack, error_mask1, and error_mask2 can be supplied as command line arguments to the

insmod or modprobe command for bnx2i.

error_mask1 and error_mask2

"Config FW iSCSI Error Mask #", use to configure certain iSCSI protocol violation to be treated either as a warning or a fatal

error. All fatal iSCSI protocol violations will result in session recovery (ERL 0). These are bit masks.

Defaults: All violations will be treated as errors.

CAUTION! Do not use error_mask if you are not sure about the consequences. These values are to be discussed with

Broadcom development team on a case-by-case basis. This is just a mechanism to work around iSCSI implementation

issues on the target side and without proper knowledge of iSCSI protocol details, users are advised not to experiment with

these parameters.

en_tcp_dack

"Enable TCP Delayed ACK", enables/disables TCP delayed ACK feature on offloaded iSCSI connections.

Defaults: TCP delayed ACK is ENABLED. For example:

1 2 ... 150 151 152 153 154 155 156 157 158 159 160 ... 331 332

Keine Kommentare

Dell Broadcom NetXtreme Family of Adapters Betriebsanweisung Seite 155