netdev - Re: [IPV4] FIB_HASH : Avoid unecessary loop in fn_hash_dump

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Date:	Fri, 18 Jan 2008 04:30:45 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	dada1@...mosbay.com
Cc:	netdev@...r.kernel.org, Robert.Olsson@...a.slu.se
Subject: Re: [IPV4] FIB_HASH : Avoid unecessary loop in fn_hash_dump_zone()

From: Eric Dumazet <dada1@...mosbay.com>
Date: Wed, 16 Jan 2008 18:19:25 +0100

> I noticed "ip route list" was slower than "cat /proc/net/route" on a machine with a full Internet
> routing table (214392 entries : Special thanks to Robert ;) )
> 
> This is similar to problem reported in commit d8c9283089287341c85a0a69de32c2287a990e71
> 
> Fix is to avoid scanning the begining of fz_hash table, but directly seek to the right offset.
> 
> Before patch :
> 
> time ip route >/tmp/ROUTE
> 
> real    0m1.285s
> user    0m0.712s
> sys     0m0.436s
> 
> After patch
> 
> # time ip route >/tmp/ROUTE
> 
> real    0m0.835s
> user    0m0.692s
> sys     0m0.124s
> 
> Signed-off-by: Eric Dumazet <dada1@...mosbay.com>

Applied, thanks Eric.
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