From: Alexey Talikov <alexey_talikov@texlab.com.uz>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] a question about TBF
Date: Mon, 03 Jun 2002 04:09:41 +0000 [thread overview]
Message-ID: <marc-lartc-102307748709060@msgid-missing> (raw)
In-Reply-To: <marc-lartc-98939784410792@msgid-missing>
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Increase your burst it value at list MTU i.e 1500 byte
rate=ST*burst (ST system timer 100HZ for intel/amd 1024 for alpha)
rate
burst=------- and burst>MTU
ST
See: Advanced routing HOWTO and for more details
Short Evaluation of Linux's TBF Queueing Discipline. Kurt Wagner 17 May 2001
03.06.2002 7:27:30, Huang Xin Gang <hxgang@csnet4.cs.tsinghua.edu.cn> wrote:
>LARTC£¬hello£¡
>
>I set the command following:
>
>tc qdisc add dev eth0 root tbf rate 100kbit latency 50ms burst 120
>
>and then I send flow with speed of 115.2kbit, and if all the packets sent is only 120bytes,the
above command is useless.
>
>I thinks because the time occupied when sent a packet only 120 bytes is 120*8/(100*1024)<10ms,
>but Linux system produces a tick every 10ms,so every time when a packet only 120 bytes
>is being sent, the "toks" equals to zero always, and this packet can be sent immediately.
>
>all the packets are sent immediately, then the speed is not limited to 100kbit.
>
>How can I deal with this problem?
>
>¡¡¡¡¡¡best regards!
>
>
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡Huang Xin Gang
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡hxgang@csnet4.cs.tsinghua.edu.cn
>¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2002-06-03
>,\x04S
>f¢–)à–+-ü°\x11L)šŠYš?jya¶Ú?þf¢–f§vÏZž_æj)fj?åŠËbú?•ªíps–Lèm¶Ÿ?•ªírŠà
-----------------------------------
mailto:alexey_talikov@texlab.com.uz
BR
Alexey Talikov
FORTEK
-----------------------------------
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prev parent reply other threads:[~2002-06-03 4:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-05-09 8:41 [LARTC] A question about tbf Juergen
2002-06-03 2:26 ` [LARTC] a question about TBF Huang Xin Gang
2002-06-03 2:27 ` Huang Xin Gang
2002-06-03 4:09 ` Alexey Talikov [this message]
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