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Date:      Fri, 16 Oct 1998 01:21:03 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        Brian Somers <brian@Awfulhak.org>
Cc:        Bruce Evans <bde@zeta.org.au>, current@FreeBSD.ORG, kjc@csl.sony.co.jp
Subject:   Re: Improper sharing of modem bandwidth 
Message-ID:  <199810151721.BAA12300@spinner.netplex.com.au>
In-Reply-To: Your message of "Thu, 15 Oct 1998 08:12:18 %2B0100." <199810150712.IAA00515@woof.lan.awfulhak.org> 

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Brian Somers wrote:
> > >If there was an ioctl to change the usable tty buffer size to less than 
> > >4k, ppp could set it to ``whatever the MTU is'' and get quite a 
> > >reasonable interactive performance gain.
> > 
> > Maybe not.  Kernel ppp doesn't have the 4KB buffer between it and the
> > driver, but its interactive performance is not reasonable when just
> > one scp is using the link.
> 
> But kernel ppp doesn't do any interactive queue jumping does it ?

Yes it does, and has done so from near day one.  However, it's IP_TOS 
based rather than the traditional magic port numbers.

> > Bruce

Cheers,
-Peter




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