Date: Wed, 2 Jul 2014 18:50:34 -0500 From: Bryan Venteicher <bryanv@daemoninthecloset.org> To: freebsd-net@freebsd.org Subject: Add netbw option to systat Message-ID: <CAMo0n6QD7tbObfSihfK8Sqgza-Td%2BSmfLubAcLhrBQBKfM5Fjg@mail.gmail.com>
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Awhile back, DragonlyFlyBSD added a netbw option to systat that I've ported
to FreeBSD and found handy at various times:
netbw Display aggregate and per-connection TCP receive and transmit
rates. Only active TCP connections are shown.
Leading to output such as:
tcp accepts connects rcv 1.192G snd 15.77K rexmit
192.168.10.80:22 192.168.10.20:23103 rcv snd 415.7 [ NTSX ]
192.168.10.80:22 192.168.10.20:46560 rcv 19.80M snd 14.47K [ NTSX ]
192.168.10.80:22 192.168.10.20:60699 rcv snd 886.3 [ NTSX ]
192.168.10.81:5201 192.168.10.51:60844 rcv 293.2M snd [R TSX ]
192.168.10.81:5201 192.168.10.51:60845 rcv 293.5M snd [R TSX ]
192.168.10.81:5201 192.168.10.51:60846 rcv 293.2M snd [R TSX ]
192.168.10.81:5201 192.168.10.51:60847 rcv 292.9M snd [R TSX ]
It uses the sequences number from the 'struct tcpcb' to derive the rates,
which is usually good but certainly not perfect (i.e., don't set the
interval too long).
I'd like to commit this if anybody else thinks they'd find it useful.
http://people.freebsd.org/~bryanv/patches/systat-netbw.patch
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