Issue 11
© Solarflare Communications 2014
301
Solarflare Server Adapter
User Guide
rx_nodesc_drop_cnt
Number of packets dropped by the network adapter
because of a lack of RX descriptors in the RX queue.
Packets can be dropped by the NIC when there are
insufficient RX descriptors in the RX queue to allocate to the
packet. This problem can occur if the receive rate is very
high and the network adapter is not able to allocate
memory and refill the RX descriptor ring quickly enough to
keep up with the incoming packet rate.
A number of different steps can be tried to resolve this
issue:
1. Disable the irqbalance daemon in the OS.
2. Distribute the traffic load across the available CPU/cores
by setting rss_cpus=cores. Refer to Receive Side Scaling
section.
3. Increase receive queue size using ethtool.
rx_octets
Total number of octets received.
rx_pause_pkts
Number of pause packets received with valid pause
op_code.
rx_pkts
Total number of packets received.
rx_symbol_errors
Count of the number of times the receiving media is non-
idle (the time between the Start of Packet Delimiter and
the End of Packet Delimiter) for a period of time equal to
or greater than minimum frame size, and during which
there was at least one occurrence of an event that causes
the PHY to indicate Receive Error on the MII.
rx_unicst_pkts
Number of unicast packets received.
tx_1024_to_15xx_pkts
Number of packets transmitted where the length is
between 1024 and 15xx bytes. 1518(non VLAN),
1522(VLAN).
tx_128_to_255_pkts
Number of packets transmitted where the length is
between 128 and 255 bytes.
tx_256_to_511_pkts
Number of packets transmitted where the length is
between 256 and 511 bytes.
tx_512_to_1023_pkts
Number of packets transmitted where the length is
between 512 and 1023 bytes.
Table 75: Name sfxge_mac
Parameter
Description