dropwatch 工具分析网络丢包

原创

隔壁没老王

发布于 2022-08-25 03:18:04

2.4K0

安装

yum install dropwatch -y

两条命令

[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)
........

案例一

iptables 导致丢包，可以通过是否有 nf_hook *** 之类的返回结果来判断

[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>

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