like I often want to know "look when I do HTTP requests on port 9772, is it usually fast or slow?"
i really wish i had a command line tool that would give me stats on TCP connection lengths on a given port
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If tcpdump emits a timestamp for each packet, maybe you could hack a solution together with awk or something?
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same! And how long it spends in each state! Let's write one together?
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ummmmm yes that sounds really fun okay
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i wonder if we could do this with tshark and lua
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I found this. It might help? http://yconalyzer.sourceforge.net/#mozTocId661228
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cool thanks!
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good idea, sounds like a new bcc/BPF tool. Can start with tcpconnect.py and add tcp_close(), with timing
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but my servers are not going to have BPF for yeeeeears
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could do it with ftrace or perf, but will be tricky to pull out the port numbers to test. It is doable.
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ftrace of TCP dport is doable, but "+2(%si):u16" is obviously kernel & arch specifichttps://gist.github.com/brendangregg/eebe3455fd8e528bb14d193a93d43b59 …
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ss will get you most of the way there if you pass in the options to enable TCP_INFO. https://github.com/shemminger/iproute2 … in the misc directory
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the thing you really want is called either web100 or web10g, but they're ooooold. For modern kernels, TCP_INFO and Netlink are it.
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`tshark -z conv,tcp,ip.addr==10.1.1.1&&tcp.port=22` fits the bill?
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sorry, ==22 +quote, otherwise your shell may eat the && :)
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here's a tool that I've used for that sort of thing beforehttps://github.com/DanielArndt/flowtbag …
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wireshark can do this，but not a cmd tool
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