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From: Thierry Coutelier <Thierry.Coutelier@linux.lu>
To: lartc@vger.kernel.org
Subject: [LARTC] CBQ or HTP accuracy
Date: Wed, 04 Dec 2002 11:00:20 +0000	[thread overview]
Message-ID: <marc-lartc-103899971519055@msgid-missing> (raw)



Hello,

I am rate limiting traffic going to some IP addresses using CBQ
  (and want to change to HTB sometime).

While testing with different packet sizes I found out that I could go above the
   rate limit I set. (even with HTB)

The values I use are: rate: 768kbit  weight 77kbit allot 10000 avpkt 1512
I did not change the cell or other parameters.
My root qdisc is set to 40MBit.

With those values I am able to go up to 840kbit/s with packets sizes of 612 or 1224.
With other values it's less except for very low values.

Changing the allot value (If I understood well allot*weight=max packets per round)
  it only gets worst (tested with 1000 and 50000).

AVPKT is only used for maxidle so it should not change anything ?

What values should I tweak to have the max rate never exeeded and still be able
   to come very near my max-rate using 1460 bytes packets ?

Would HTB be more accruate ?


Thanks for the HELP.

-- 
Thierry Coutelier      /'\ ASCII Ribbon Campaign
http://www.linux.lu    \ / No HTML/RTF in email
.                       ×  No Word docs in email
.                      / \ Respect for open standards


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             reply	other threads:[~2002-12-04 11:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-04 11:00 Thierry Coutelier [this message]
2002-12-04 15:39 ` [LARTC] CBQ or HTP accuracy Stephane Ouellette
2002-12-05 15:34 ` Thierry Coutelier

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