User Manual

Rev 4.60
Mellanox Technologies
17
3.3 Receive Side Scaling (RSS)
Mellanox WinOF Rev 4.60 IPoIB and Ethernet drivers use NDIS 6.30 new RSS capabilities. The
main changes are:
• Supports unlimited number of processors (previously 64)
• Individual network adapter RSS configuration usage
 RSS capabilities can be set per individual adapters as well as global.
To do so, set the registry keys listed below:
 To find the nn value of your HCA from the Device Manager please perform the following
steps:
Step 1. Open Device Manager, and go to System devices.
Step 2. Right click -> properties on Mellanox -ConnectX® card.
Step 3. Go to Details tab.
Table 4 - Registry Keys Setting
Sub-key Description
HKLM\SYSTEM\CurrentControlSet\Con-
trol\Class\{4d36e972-e325-11ce-bfc1-
08002be10318}\<nn>\*MaxRSSProcessors
Maximum number of CPUs allotted. Sets
the desired maximum number of processors
for each interface. The number can be differ-
ent for each interface.
Note: Restart the network adapter when you
change this registry key.
HKLM\SYSTEM\CurrentControlSet\Con-
trol\Class\{4d36e972-e325-11ce-bfc1-
08002be10318}\<nn>\*RssBaseProcNumber
Base CPU number. Sets the desired base
CPU number for each interface. The number
can be different for each interface. This
allows partitioning of CPUs across network
adapters.
Note: Restart the network adapter when you
change this registry key.
HKLM\SYSTEM\CurrentControlSet\Con-
trol\Class\{4d36e972-e325-11ce-bfc1-
08002be10318}\<nn>\*NumaNodeID
NUMA node affinitization
HKLM\SYSTEM\CurrentControlSet\Con-
trol\Class\{4d36e972-e325-11ce-bfc1-
08002be10318}\<nn>\*RssBaseProcGroup
Sets the RSS base processor group for sys-
tems with more than 64 processors.