User Manual

Rev 4.70
Mellanox Technologies
182
*RSS 1 Sets the driver to use Receive Side Scaling (RSS) mode to
improve the performance of handling incoming packets.
This mode allows the adapter port to utilize the multiple
CPUs in a multi-core system for receiving incoming packets
and steering them to their destination. RSS can significantly
improve the number of transactions per second, the number
of connections per second, and the network throughput.
This parameter can be set to one of two values:
• 1: enable (default)
Sets RSS Mode.
• 0: disable
The hardware is configured once to use the Toeplitz
hash function and the indirection table is never changed.
Note: the I/O Acceleration Technology (IOAT) is not func-
tional in this mode.
TxHashDisrtibution 3 Sets the algorithm which is used to distribute the send-pack-
ets on different send rings. The adapter uses 3 methods:
• 1: Size
In this method only 2 Tx rings are used. The send-pack-
ets are distributed, based on the packet size. Packets that
are smaller than 128 bytes use one ring, while the larger
packets use the other ring.
• 2: Hash
In this method the adapter calculates a hash value based
on the destination IP, the TCP source and the destination
port. If the packet type is not IP, the packet uses ring
number 0.
• 3: Hash and size
In this method for each hash value, 2 rings are used: one
for small packets and another one for larger packets.
The valid values are:
• 1: size
• 2: hash
• 3: hash and size
Note: This registry value is not exposed via the UI.
RxSmallPacketBypass 0 Specifies whether received small packets bypass larger
packets when indicating received packet to NDIS. This
mode is useful in bi-directional applications. Enabling this
mode ensures that the ACK packet will bypass the regular
packet and TCP/IP stack will issue the next packet more
quickly.
The valid values are:
• 0: disable
• 1: enable
Note: This registry value is not exposed via the UI.
Value Name Default Value Description