tcp

[heidsoft]

perf stat -ae 'tcp:,sock:'

perf record -ae 'sock:inet_sock_set_state' --call-graph dwarf

perf report

Samples: 20  of event 'sock:inet_sock_set_state', Event count (approx.): 20
  Children      Self  Command  Shared Object      Symbol
+  100.00%     0.00%  python   python2.7          [.] _start
+  100.00%     0.00%  python   libc-2.31.so       [.] __libc_start_main (inlined)
+  100.00%     0.00%  python   python2.7          [.] Py_Main
+  100.00%     0.00%  python   python2.7          [.] PyRun_SimpleFileExFlags
+  100.00%     0.00%  python   python2.7          [.] PyRun_FileExFlags
+  100.00%     0.00%  python   python2.7          [.] PyEval_EvalCode
+  100.00%     0.00%  python   python2.7          [.] PyEval_EvalCodeEx
+  100.00%     0.00%  python   python2.7          [.] PyEval_EvalFrameEx
+  100.00%     0.00%  python   [kernel.kallsyms]  [k] entry_SYSCALL_64_after_hwframe
+  100.00%     0.00%  python   [kernel.kallsyms]  [k] do_syscall_64
+   90.00%    90.00%  python   [kernel.kallsyms]  [k] inet_sk_state_store
+   90.00%     0.00%  python   [kernel.kallsyms]  [k] tcp_set_state
+   70.00%     0.00%  python   [kernel.kallsyms]  [k] tcp_v4_do_rcv
+   60.00%     0.00%  python   python2.7          [.] PyObject_SetAttr
+   60.00%     0.00%  python   python2.7          [.] PyObject_GenericSetAttr
+   60.00%     0.00%  python   python2.7          [.] PyMember_SetOne
+   60.00%     0.00%  python   libc-2.31.so       [.] __GI___close (inlined)
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] syscall_exit_to_user_mode
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] exit_to_user_mode_prepare
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] task_work_run
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] ____fput
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] __fput
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] sock_close
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] __sock_release
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] inet_release
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] tcp_close
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] __tcp_close
+   60.00%     0.00%  python   [kernel.kallsyms]  [k] tcp_rcv_state_process
+   50.00%     0.00%  python   [kernel.kallsyms]  [k] __tcp_transmit_skb
+   50.00%     0.00%  python   [kernel.kallsyms]  [k] ip_queue_xmit
+   50.00%     0.00%  python   [kernel.kallsyms]  [k] __ip_queue_xmit
+   50.00%     0.00%  python   [kernel.kallsyms]  [k] ip_local_out

perf tcp

root@heidsoft-dev:~# perf script
python 12589 [000]  3120.823728: sock:inet_sock_set_state: family=AF_INET protocol=IPPROTO_TCP sport=0 dport=10000 sadd>
        ffffffff84db9a82 inet_sk_state_store+0x52 ([kernel.kallsyms])
        ffffffff84db9a82 inet_sk_state_store+0x52 ([kernel.kallsyms])
        ffffffff84d7718f tcp_set_state+0x8f ([kernel.kallsyms])
        ffffffff84d9673d tcp_v4_connect+0x26d ([kernel.kallsyms])
        ffffffff84db7150 __inet_stream_connect+0xd0 ([kernel.kallsyms])
        ffffffff84db744b inet_stream_connect+0x3b ([kernel.kallsyms])
        ffffffff84c91973 __sys_connect_file+0x63 ([kernel.kallsyms])
        ffffffff84c91a24 __sys_connect+0xa4 ([kernel.kallsyms])
        ffffffff84c91a7a __x64_sys_connect+0x1a ([kernel.kallsyms])
        ffffffff84f6156c do_syscall_64+0x5c ([kernel.kallsyms])
        ffffffff85000099 entry_SYSCALL_64_after_hwframe+0x61 ([kernel.kallsyms])
            7f03512db1d7 __libc_connect+0x147 (inlined)
            55697aac3777 [unknown] (/usr/bin/python2.7)
            55697aac48ca [unknown] (/usr/bin/python2.7)
            55697aa008bd PyEval_EvalFrameEx+0x2e0d (/usr/bin/python2.7)
            55697aa171c5 [unknown] (/usr/bin/python2.7)
            55697a9df106 PyObject_Call+0x46 (/usr/bin/python2.7)
            55697aa7469f [unknown] (/usr/bin/python2.7)
            55697a9df106 PyObject_Call+0x46 (/usr/bin/python2.7)
            55697aa03afc PyEval_EvalFrameEx+0x604c (/usr/bin/python2.7)
            55697a9fbd2d PyEval_EvalCodeEx+0x52d (/usr/bin/python2.7)
            55697a9fb7f9 PyEval_EvalCode+0x19 (/usr/bin/python2.7)
            55697aa2f2a3 [unknown] (/usr/bin/python2.7)
            55697aa2a0da PyRun_FileExFlags+0x8a (/usr/bin/python2.7)
            55697aa29158 PyRun_SimpleFileExFlags+0x168 (/usr/bin/python2.7)
            55697a9c6c7c Py_Main+0x58c (/usr/bin/python2.7)
            7f03511df0b2 __libc_start_main+0xf2 (inlined)

SYN | Synchronization | Used to create a TCP connection -- | -- | -- ACK | Acknowledgment | Used to acknowledge the reception of data or synchronization packets PSH | Push | Instruct the network stacks to bypass buffering URG | Urgent | Indicates out-of-band data that must be processed by the network stacks before normal data FIN | Finish | Gracefully terminate the TCP connection RST | Reset | Immediately terminate the connection and drop any in-transit data

https://www.site24x7.com/learn/linux/tcp-flags.html