7–VMware Driver Software
Driver Parameters
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For example, set the
pri_map
parameter to
0x22221100
to map priority 0 and
1 to CoS 0, map priority 2 and 3 to CoS 1, and map priority 4 to 7 to CoS 2. In
another example, set the
pri_map
parameter to
0x11110000
to map priority 0
to 3 to CoS 0, and map priority 4 to 7 to CoS 1.
qs_per_cos
Use the optional parameter
qs_per_cos
to specify the quantity of queues that
will share the same CoS. The driver evaluates this parameter up to three values of
8 bits each. Each byte sets the required quantity of queues for that CoS. The total
quantity 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 eight queues, divided into two CoS, 4 queues in each CoS.
cos_min_rate
Use the optional parameter
cos_min_rate
to determine the weight of each
CoS for round-robin scheduling in transmission. This parameter is evaluated by
the driver, up to three values of eight bits each. Each byte sets the weight for that
CoS. The weight ranges from 0 to 100.
For example, set the
cos_min_rate
parameter to
0x101
for a fair
transmission rate between two CoS. As another example, set the
cos_min_rate
parameter to
0x30201
to give the higher CoS the higher rate
of transmission. To avoid using the fairness algorithm, omit setting the optional
parameter
cos_min_rate
or set it to
0
.
RSS
Use the optional parameter
RSS
to specify the quantity of receive side scaling
queues. For VMware ESXi (5.1, 5.5, 6.0, or 6.5), values for
RSS
can be from
2
to
4
;
RSS=1
disables RSS queues.
max_vfs
Use the optional parameter
max_vfs
to enable a specific quantity of virtual
functions. Values for
max_vfs
can be
1
to
64
, or set
max_vfs=0
(default) to
disable all virtual functions.
enable_vxlan_offld
Use the optional parameter
enable_vxlan_ofld
to enable or disable VMware
ESXi (5.5, 6.0) VXLAN task offloads with TX TSO and TX CSO. For VMware ESXi
(5.5, 6.0),
enable_vxlan_ofld=1
(default) enables VXLAN task offloads;
enable_vxlan_offload=0
disables VXLAN task offloads. (Information about
enabling VXLAN task offloads for ESXi 6.5 was not available at the time of
publication.)
