Re: network traffic doesn't balence well on recent kernels

Gregory Maxwell (linker@z.ml.org)
Sat, 5 Jun 1999 17:36:02 -0400 (EDT)


On Sat, 5 Jun 1999, Steve Bergman wrote:

> I've noticed this for a long time on my ppp connections. The first ftp
> transfer to get started hogs the bandwidth and subsequent ones get very
> little but very gradually improve. I would much rather have it the
> other way around so that what I am doing *right now* in the forground is
> fast and big ftp transfers get low priority. I really meant to ask
> about this a long time ago, but am just now getting around to it. BTW,
> does the reciever's tcp/ip stack have control over the priority of
> different connections or is that a sender thing only?

Unless I'm terrible off, this is the correct behavior for TCP/IP.

With TCP/IP connections start slow and speed up as they see bandwidth.
If you've already got congestion then the second connection will take
longer to get out of slow start.

Anyone know if there is currently a way with the current TC framework to
identify flows which are 'new' or still in slow-start? If there was you
could bump them to the front of the queue.

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