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From: Ivan Lopez <ivan@askai.net>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] PRIOMAP, SPLIT, DEFMAP usage info + PRIO, TBF and other bugs
Date: Mon, 02 Jul 2001 22:58:32 +0000	[thread overview]
Message-ID: <marc-lartc-99411475111879@msgid-missing> (raw)
In-Reply-To: <marc-lartc-99386571628755@msgid-missing>

On Mon, 02 Jul 2001 17:09:22 -0500
Nikolai Vladychevski <niko@netspace.com.mx> wrote:

> > ness wrote:
> >     experements I understand that it don't prioritize packets AT ALL.
> > (I'll be glad
> >     to hear that I'm wrong...)
> > 
> 
> does not in my tests, I am also looking why ....

i was playing with net/sched/sch_prio.c, trying to analize what it does
and modifying it just for write some crap in syslog and debug

i've done a few tests, ie doing a heavy upload and ping another machine
over internet, putting icmp packets into band 0 of the prio qdisc, and the
rest into band 1, and what i see is that the prio qdisc actually
classifies packets into its bands according to filters you define, and in
fact dequeues first all packets from the bands with the most priority...
but the final result is not as expected, and i have the same delay as if i
don't use any qos... i've tried attaching some different qdisc to the
bands of the prio qdisc: tbf, sfq, just fifos...

it seems to me its that prio does its work just ok, but the problem is
that the networking code is making dequeue the packets more fast than the
link can transmit them, without care about if they are accumulating again
at some point after

-- 

Ivan Lopez de Pedro
aSkAiNeT
Proud member of The Gey Panda Crew
Running Debian Sid GNU/Linux

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  parent reply	other threads:[~2001-07-02 22:58 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-06-30  1:45 [LARTC] PRIOMAP, SPLIT, DEFMAP usage info + PRIO, TBF and other bugs ness
2001-07-02 22:09 ` Nikolai Vladychevski
2001-07-02 22:58 ` Ivan Lopez [this message]
2001-07-02 23:41 ` Nikolai Vladychevski
2001-07-03 16:40 ` Nikolai Vladychevski

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