[2589] in linux-net channel archive
Re: Wierd FTP rates: incoming/outgoing >>>>>
daemon@ATHENA.MIT.EDU (Eric Schenk)
Fri Apr 19 02:45:28 1996
To: naderr@topaz.cqu.edu.au
cc: linux-net@vger.rutgers.edu
In-reply-to: Your message of "Fri, 19 Apr 1996 01:20:20 EDT."
<199604190520.PAA00239@linuxbox.nse.com.au>
Date: Fri, 19 Apr 1996 02:23:54 -0400
From: "Eric Schenk" <schenk@cs.toronto.edu>
root <root@linuxbox.nse.com.au> writes:
>
>Could someone possibly please explain to me why,
>with ony 12% & %20 packet loss to the hosts
>respectively, it may take over an hour to ftp
>a 200k & a 65k file over to my Uni hosts,
>going via sl0 using dip/slip, while I can ftp
>a 200k file from another host at a different uni,
>further away, that also has a ping reporting of
>20% packet loss, in 5 mins flat via the same port?
>
>that is ... outgoing is slow, incoming is fast? weird?
>
>I'm using kernel 1.3.89 at tis stage.
I recently went and submitted a few patches for the TCP code to
fix some oversights in the code. The first set of these appeared
in 1.3.87. Along with the fixes I tried to get some perforance
improvements by implementing fast retransmits. My first try didn't quite
do the right things, and it has take a few patch levels to get things
settled down. The 1.3.89 kernel has some serious problems with TCP
transmissions if there is any packet loss. These problems should be
fixed by now. Try linux-1.3.91 and see if your problem persists.
If it doesn't let me know so I can look into things further.
-- eric
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Eric Schenk www: http://www.cs.toronto.edu/~schenk
Department of Computer Science email: schenk@cs.toronto.edu
University of Toronto
