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From: Andy Furniss <andy.furniss@dsl.pipex.com>
To: lartc@vger.kernel.org
Subject: Re: [LARTC] ESFQ not so fair?
Date: Wed, 12 Apr 2006 22:19:33 +0000	[thread overview]
Message-ID: <443D7CF5.1020903@dsl.pipex.com> (raw)
In-Reply-To: <443D5449.20706@uznam.net.pl>

Patrick McHardy wrote:
> Andy Furniss wrote:
> 
>>Corey Hickey changed his esfq to use jhash for dst/src/fw - copy of his
>>announce below.

> 
> Using jhash is a probably a good idea, the "improved" hash is broken
> and will cause reordering in some circumstances:
> 
> return (h - q->dyn_min) * (q->hash_divisor - 1) / q->dyn_range;
> 
> dyn_min, dyn_max and dyn_range, as their name suggests, are adjusted
> dynamically, so the hash function changes whenever one of these values
> changes, resulting in reordering of packets belonging to a single flow.
> 

Oops I thought he did use jhash don't know where I got that from.

Andy.

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  parent reply	other threads:[~2006-04-12 22:19 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-04-12 19:26 [LARTC] ESFQ not so fair? Michał Margula
2006-04-12 21:35 ` Andy Furniss
2006-04-12 21:43 ` Michał Margula
2006-04-12 21:52 ` Patrick McHardy
2006-04-12 22:19 ` Andy Furniss [this message]
2006-04-12 22:24 ` Andy Furniss
2006-04-13  2:46 ` Corey Hickey
2006-04-13 10:58 ` Michał Margula

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