From owner-freebsd-stable@freebsd.org  Thu Dec 15 12:28:43 2016
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Subject: Re: sonewconn: pcb [...]: Listen queue overflow to human-readable form
To: "Eugene M. Zheganin" <emz@norma.perm.ru>, freebsd-stable@freebsd.org
References: <58528B50.8030600@norma.perm.ru>
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From: Eugene Grosbein <egrosbein@rdtc.ru>
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Date: Thu, 15 Dec 2016 19:28:27 +0700
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On 15.12.2016 19:23, Eugene M. Zheganin wrote:

> but at the time of investigation the socket is already closed and lsof
> cannot show me the owner. I wonder if the kernel can itself decode this
> output and write it in the human-readable form ?

Until that's not implemented, you can monitor "netstat -Lan" output and
continuously save it for later analisys and/or draw graphs.