Re: git: 8e593a1f1432 - main - fortune: fix netstat tip

On Wed, Feb 18, 2026, 11:51 AM John Baldwin <jhb@freebsd.org> wrote:

> On 2/18/26 11:55, Warner Losh wrote:
> > The branch main has been updated by imp:
> >
> > URL:
> https://cgit.FreeBSD.org/src/commit/?id=8e593a1f143203cace2e14bd6629a8ebdf9b47dc
> >
> > commit 8e593a1f143203cace2e14bd6629a8ebdf9b47dc
> > Author:     Warner Losh <imp@FreeBSD.org>
> > AuthorDate: 2026-02-10 14:59:58 +0000
> > Commit:     Warner Losh <imp@FreeBSD.org>
> > CommitDate: 2026-02-18 16:39:28 +0000
> >
> >      fortune: fix netstat tip
> >
> >      netstati <mumble> 8 reports in bytes per second (averaged over 8
> >      seconds) rather than bits per second because it reports the total
> >      in bits over the 8 seconds...
> >
> >      Sponsored by:           Netflix
>
> Eh, I originally thought this too, but the original hint is right.  netstat
> doesn't report a per-second average, just the delta, so when using '8' it
> is showing the number of bytes sent/received in the 8 second interval which
> effectively multiplies the per-second rate by 8, so if it is a constant
> rate you get the bits-per-second as the output.
>
> Relevant code from sidewaysintpr() in if.c:
>
>         fill_iftot(new);
>
>         xo_open_instance("stats");
>         show_stat("lu", 10, "received-packets",
>             new->ift_ip - old->ift_ip, 1, 1);
>         show_stat("lu", 5, "received-errors",
>             new->ift_ie - old->ift_ie, 1, 1);
>         show_stat("lu", 5, "dropped-packets",
>             new->ift_id - old->ift_id, 1, 1);
>         show_stat("lu", 10, "received-bytes",
>             new->ift_ib - old->ift_ib, 1, 0);
>         show_stat("lu", 10, "sent-packets",
>             new->ift_op - old->ift_op, 1, 1);
>         show_stat("lu", 5, "send-errors",
>             new->ift_oe - old->ift_oe, 1, 1);
>         show_stat("lu", 10, "sent-bytes",
>             new->ift_ob - old->ift_ob, 1, 0);
>         show_stat("NRSlu", 5, "collisions",
>             new->ift_co - old->ift_co, 1, 1);
>         if (dflag)
>                 show_stat("LSlu", 5, "dropped-packets",
>                     new->ift_od - old->ift_od, 1, 1);
>         xo_close_instance("stats");
>         xo_emit("\n");
>         xo_flush();
>
> (Note no scaling, just 'new - old')
>

Oh. Damn. I'll revert

-- 
> John Baldwin
>
>