dropwatch 工具分析网络丢包

yum install dropwatch -y 

[root@VM-80-27-centos ~]# dropwatch -l kas   # 命令1
Initalizing kallsyms db
dropwatch> start  # 命令2
Enabling monitoring...
Kernel monitoring activated.
Issue Ctrl-C to stop monitoring
1 drops at skb_queue_purge+18 (0xffffffff92a42868)
........

[root@VM-80-27-centos ~]# 
[root@VM-80-27-centos ~]# dropwatch -l kas
Initalizing kallsyms db
dropwatch> start
Enabling monitoring...
Kernel monitoring activated.
Issue Ctrl-C to stop monitoring
1 drops at skb_queue_purge+18 (0xffffffff92a42868)
2 drops at unix_dgram_sendmsg+4f8 (0xffffffff92b1b168)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
6 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
4 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
2 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
1 drops at unix_dgram_sendmsg+4f8 (0xffffffff92b1b168)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
2 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
2 drops at unix_stream_connect+2da (0xffffffff92b1b95a)
1 drops at unix_dgram_sendmsg+4f8 (0xffffffff92b1b168)
1 drops at unix_dgram_sendmsg+4f8 (0xffffffff92b1b168)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
4 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
1 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
2 drops at nf_hook_slow+f3 (0xffffffff92a99be3)
^CWaiting for deactivation ack...
Got a stop message
dropwatch>