Driver Parameters
(Linux)
This table lists the tunable bnxt_en driver parameters for Linux OS and
describes their functions.
|
|
|
|
FlowControl |
0 to 3
(0=none, 1=RX only,
2=TX only,
3=RX and TX) |
If EEPROM is not detected, default is 3. |
Controls the automatic generation ( TX) and
response ( RX) to Ethernet
PAUSE frames. |
RxDescriptiors |
64 to 4096 |
512 |
Number of receive descriptors allocated by the driver. Increasing this value allows the driver
to buffer more incoming packets. Each descriptor is 16 bytes. A
receive buffer is also allocated for each descriptor and can be
either 2048, 4056, 8192, or 16384 bytes, depending on the MTU
setting. When the MTU size is 1500 or less, the receive buffer size
is 2048 bytes. When the MTU is greater than 1500, the receive buffer
size is either 4056, 8192, or 16384 bytes. The maximum MTU size is
16114. |
RxIntDelay |
0 to 65535
(0=off) |
72 |
Delays the generation of receive interrupts in units of 0.8192 microseconds. Receive interrupt
reduction can improve CPU efficiency if properly tuned for specific
network traffic. Increasing this value adds extra latency to frame
reception and can end up decreasing the throughput of TCP traffic. If the system
is reporting dropped receives, this value might be set too high,
causing the driver to run out of available receive
descriptors. |
TxDescriptors |
80 to 4096 |
256 |
Number of transmit descriptors allocated
by the driver. Increasing this value allows the driver to queue
more transmits. Each descriptor is 16 bytes. |
XsumRX |
0 to 1 |
1 |
A value of 1 indicates that the driver should enable IP checksum offload for received packets
(both UDP and TCP) to
the Ethernet adapter hardware. |
|