Intel Ethernet X520 10GbE Dual Port KX4 Mezz User Manual

Parameter Name Valid
Range/Settings
Default Description
LLIPort 0-65535 0 (dis-
abled)
LLIPort configures the port for Low Latency Interrupts (LLI).
Low Latency Interrupts allow for immediate generation of an
interrupt upon processing receive packets that match certain cri-
teria as set by the parameters described below. LLI parameters
are not enabled when Legacy interrupts are used. You must be
using MSI or MSI-X (see cat /proc/interrupts) to successfully use
LLI.
For example, using LLIPort=80 would cause the board to gen-
erate an immediate interrupt upon receipt of any packet sent to
TCP port 80 on the local machine.
CAUTION: Enabling LLI can result in an excessive
number of interrupts/second that may cause problems
with the system and in some cases may cause a ker-
nel panic.
LLIPush 0-1 0 (dis-
abled)
LLIPush can be set to enabled or disabled (default). It is most
effective in an environment with many small transactions.
NOTE: Enabling LLIPush may allow a denial of service
attack.
LLISize 0-1500 0 (dis-
abled)
LLISize causes an immediate interrupt if the board receives a
packet smaller than the specified size.
IntMode 0-2 2
This allows load time control over the interrupt type registered
by the driver. MSI-X is required for multiple queue support.
Some kernels and combinations of kernel .config options will
force a lower level of interrupt support. 'cat/proc/interrupts' will
show different values for each type of interrupt.
0 = Legacy Interrupts.
1 = MSI Interrupts.
2 = MSI-X interrupts (default).
RSS 0-8 1 0 = Assign up to whichever is less between the number of
CPUs or the number of queues.
X = Assign X queue, where X is less than or equal to the max-
imum number of queues. The driver allows maximum sup-
ported queue value. For example, I350-based adapters allow
RSS=8, where 8 is the maximum queues allowed.
NOTE: For 82575-based adapters, the maximum num-
ber of queues is 4. For 82576-based and newer
adapters, it is 8.
This parameter is also affected by the VMDQ parameter in that
it will limit the queues more.
Model 0 1 2 3+
82575 4 4 3 1
82576 8 2 2 2

Intel Ethernet X520 10GbE Dual Port KX4 Mezz Specifications

General

Interface	KX4
Data Rate	10 Gbps
Form Factor	Mezzanine
Data Transfer Rate	10 Gbps
Product Type	Network Adapter
Controller	Intel 82599
PCIe Version	2.0
Virtualization	Yes
Operating Temperature	0°C to 55°C
Jumbo Frames	Supported
Ports	Dual Port