I have been testing this over a very slow (barely ever over 24000 bps due
to a crappy phone line) dial-up link, and as expected, over an idle line
there is no difference (typing in an interactive ssh session seems a
little quicker, but that could just be me). The gain comes when someone is
downloading over the link and I try to type in an interactive ssh
session. (I'm sharing the link with 1 other computer). Without the sysctl
turned on typing in the "interactive" session results in a 10-15 second
wait before anything appears on the screen; but with the sysctl turned on
the wait is 2-3 seconds. I'd say that's pretty good work :-)
Ken
On Mon, 16 Jul 2001, Luigi Rizzo wrote:
> > Cool! We were just commenting that it's too bad dummynet/ALTQ really
> > couldn't help the interactive response for us dial-up users. Anyway, I
>
> i haven't seen the beginning of the thread but surely both altq
> and dummynet can help, with the CBQ/WFQ support.
>
> In the case of dummynet, you can pace incoming traffic as well,
> at your endpoint. This means you act after the bottleneck,
> but the effect is that this way
> you will delay acks, and so slow down the connection eating a lot of
> bandwidth, and in the steady state this keeps the queue very
> short even before the bottleneck.
> Much like what products like packeteer do.
>
> cheers
> luigi
>
> > just tried this on my dial-up connection on a fresh -STABLE but don't
> > really notice any appreciable difference.
> >
> > net.inet.tcp.tcp_send_dynamic_enable: 1
> > net.inet.tcp.tcp_send_dynamic_min: 1024 (tried it with default 4096 too)
> >
> > My ssh response is still about 3 or 4 seconds behind my typing. What
> > should a dial-up user expect?
> >
> > Thanks!
> >
> > Tim
> >
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> >
>
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