From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] Transfer rate above the desired (tc+htb)
Date: Wed, 20 Jul 2005 18:56:03 +0000 [thread overview]
Message-ID: <42DE9E43.7@dsl.pipex.com> (raw)
In-Reply-To: <3941d81c0507201042563b5e45@mail.gmail.com>
Alvaro Motta wrote:
> Hi folks.
>
> I started to play with tc+htb last week, and I must confess that this
> thing is really driving me nuts.
>
> All we want to do is control bw, with no borrowing.
>
> In order to get the feeling on this subject, I have setup the
> following test bed.
>
> ---A---B---C---
>
> On B: eth0 connecting A and eth1 connecting C.
>
> The script.
>
> tc qdisc del dev eth0 root
> tc qdisc add dev eth0 root handle 1: htb default 50
> tc class add dev eth0 parent 1: classid 1:1 htb rate 32kbit ceil 32kbit
> tc filter add dev eth0 protocol ip parent 1:0 prio 100 u32 match ip
> src 10.4.0.0/16 match ip dst 0.0.0.0/0 classid 1:1
Should be src 192.168.0.0/24.
Andy.
>
> If I try to transfer a 1M file from C to A:
>
> [root@localpost tmp]# wget 192.168.0.23/1M
> --09:22:32-- http://192.168.0.23/1M => `1M.8'
> Connecting to 192.168.0.23:80... connected.
> HTTP request sent, awaiting response... 200 OK
> Length: 1,024,000 [text/plain]
> 100%[===========>] 1,024,000 183.12K/s ETA 00:00
> 09:22:38 (182.88 KB/s) - `1M' saved [1,024,000/1,024,000]
>
> Wasn't it supposed to be around the 32KB/s?
>
> If I play with the numbers (rateÎil) I get the following results:
> 128k => 404.78 KB/s
> 64k => 337.9 KB/s
> 16k => 68.86 KB/s
> 8k => 31.12 KB/s
> 1k => 3.77 KB/s
>
> I even tried to set the rate to 1kbps in root, but also led to pretty
> much the same results.
>
> With no qdisc, the rate will go close to 1000 KB/s
>
> B machine:
> 2.6.11-1.1369_FC4
> iproute-2.6.11-1
> TC HTB version 3.3
>
> I have no clue on what I am doing wrong. Could anyone browse the above
> script and give me hint?
>
> Thanks in advance,
>
> AL
> _______________________________________________
> LARTC mailing list
> LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/cgi-bin/mailman/listinfo/lartc
>
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next prev parent reply other threads:[~2005-07-20 18:56 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-20 17:42 [LARTC] Transfer rate above the desired (tc+htb) Alvaro Motta
2005-07-20 18:56 ` Andy Furniss [this message]
2005-07-20 20:11 ` Alvaro Motta
2005-07-20 21:11 ` Andy Furniss
2005-07-20 23:14 ` Francisco Pereira
2005-07-24 18:06 ` gypsy
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