今天在定位网卡丢包情况的时候，由于不太清楚实际环境，猜想有可能驱动几个queue打到了同一个queue去了，导致丢包，但是由于用的驱动直接打了个缺口，将包送到了用户态进行处理，而没有经过内核态，所以以为跟tcpdump以及tshark无法监听一样，但实际上，通过一个ethtool的简单命令，是可以得到信息的
# ethtool -S xge0
NIC statistics:
rx_packets: 46492161059
tx_packets: 6
rx_bytes: 17618855793124
tx_bytes: 468
lsc_int: 1
tx_busy: 0
non_eop_descs: 0
rx_errors: 0
tx_errors: 0
rx_dropped: 0
tx_dropped: 0
multicast: 413997
broadcast: 828557
rx_no_buffer_count: 0
collisions: 0
rx_over_errors: 0
rx_crc_errors: 0
rx_frame_errors: 0
rx_fifo_errors: 0
rx_missed_errors: 1313867353
tx_aborted_errors: 0
tx_carrier_errors: 0
tx_fifo_errors: 0
tx_heartbeat_errors: 0
tx_timeout_count: 0
tx_restart_queue: 0
rx_long_length_errors: 0
rx_short_length_errors: 0
tx_tcp4_seg_ctxt: 0
tx_tcp6_seg_ctxt: 0
tx_flow_control_xon: 0
rx_flow_control_xon: 0
tx_flow_control_xoff: 0
rx_flow_control_xoff: 0
rx_csum_offload_good: 0
rx_csum_offload_errors: 0
tx_csum_offload_ctxt: 0
low_latency_interrupt: 0
alloc_rx_page_failed: 0
alloc_rx_buff_failed: 0
lro_aggregated: 0
lro_flushed: 0
lro_recycled: 0
rx_no_dma_resources: 0
hw_rsc_count: 0
rx_flm: 0
fdir_match: 0
fdir_miss: 0
tx_queue_0_packets: 6
tx_queue_0_bytes: 468
tx_queue_1_packets: 0
tx_queue_1_bytes: 0
tx_queue_2_packets: 0
tx_queue_2_bytes: 0
tx_queue_3_packets: 0
tx_queue_3_bytes: 0
rx_queue_0_packets: 29820640125
rx_queue_0_bytes: 12341613815128
rx_queue_1_packets: 2464849382
rx_queue_1_bytes: 374791298420
rx_queue_2_packets: 8355358699
rx_queue_2_bytes: 832094937421
rx_queue_3_packets: 5851312853
rx_queue_3_bytes: 4070355742155
这里实际上可以获得网卡驱动的信息，这正是我想要的，一共加载了4个queue
# ethtool -S xge0 | grep rx_queue
rx_queue_0_packets: 29820640125
rx_queue_0_bytes: 12341613815128
rx_queue_1_packets: 2464849382
rx_queue_1_bytes: 374791298420
rx_queue_2_packets: 8355358699
rx_queue_2_bytes: 832094937421
rx_queue_3_packets: 5851312853
rx_queue_3_bytes: 4070355742155
这里就是硬件RX的情况，除了-S选项，还有几个也是用的比较普遍的，下面几个是平时用的比较多，需要检查的，接收模块，以及RX，TX，AUTONEG等等，其它的一些选项，搜搜就知道用法了
# ethtool xge0 Settings for xge0: Supported ports: [ FIBRE ] Supported link modes: 1000baseT/Full 10000baseT/Full Supported pause frame use: No Supports auto-negotiation: Yes Advertised link modes: 10000baseT/Full Advertised pause frame use: No Advertised auto-negotiation: Yes Speed: 10000Mb/s Duplex: Full Port: FIBRE PHYAD: 0 Transceiver: external Auto-negotiation: on Supports Wake-on: d Wake-on: d Current message level: 0x00000007 (7) drv probe link Link detected: yes # ethtool -a xge0 Pause parameters for xge0: Autonegotiate: off RX: off TX: off # ethtool -k xge0 Features for xge0: rx-checksumming: on tx-checksumming: off scatter-gather: off tcp-segmentation-offload: off udp-fragmentation-offload: off generic-segmentation-offload: off generic-receive-offload: off large-receive-offload: off rx-vlan-offload: off tx-vlan-offload: off ntuple-filters: off receive-hashing: off
