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List:       kde-devel
Subject:    Re: "Niceness" for network transfers
From:       Rainer Wirtz <rainer.wirtz () gmx ! de>
Date:       2005-02-19 2:01:56
Message-ID: 200502190301.56407.rainer.wirtz () gmx ! de
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Am Freitag, 18. Februar 2005 18:58 schrieb Thiago Macieira:
> Rainer Wirtz wrote:

> >This would leave unsolved the problem of how to find out when there
> > are other transfers that you (read: my application) wants to grant
> > priority. Maybe wondershaper has find a good trick for that. Idealy
> > this would work for non-kde applications as well. I'll have a look.
>
> Huh? If the application doesn't know what it wants prioritised, who
> will?

I want to have kget make the best possible use of the limited bandwidth, 
but when konqueror or firefox request a html-page I want this to be 
handled as fast as possible. When this should be done by kget 
throttling it's read rate from the slave, then kget needs to know 
somehow when there is a http-request pending.
It has to be done on kernel level, this "wondershaper" script is calling 
"tc", which is only available on linux AFAIK and makes use of the 
various QoS features. Maybe kget could make those calls, or a small 
utility with a DCOP interface. Of course this is a question of 
permissions. Sysadmins don't necessary want users to tamper with their 
bandwidth management settings.
Further "wondershaper" is limiting the bandwidth to slightly below the 
interface bandwidth to keep the buffers in the modem and on the ISP 
side empty. I would need to find a way to find out those values, kind 
of autotuning. 
I need to do more reading on this, but I have a direction now.

Rainer
 
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