From: Changli Gao <xiaosuo@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Patrick McHardy <kaber@trash.net>, netfilter-devel@vger.kernel.org
Subject: Re: [PATCH 3/3] nfnetlink_queue: use hash table to speed up entry finding.
Date: Tue, 13 Apr 2010 21:02:49 +0800 [thread overview]
Message-ID: <h2h412e6f7f1004130602sbeba6466w198a600253ad447@mail.gmail.com> (raw)
In-Reply-To: <1271162669.16881.301.camel@edumazet-laptop>
On Tue, Apr 13, 2010 at 8:44 PM, Eric Dumazet <eric.dumazet@gmail.com> wrote:
> Le mardi 13 avril 2010 à 19:06 +0800, Changli Gao a écrit :
>
> Thats theory. And for sparse arrays, that pro might be true.
> In your case, you prealloc all the array, using more ram than vmalloc...
>
> In practice, x86 cpu can access vmalloced() data much faster then
> flex_array_managed data (take a look at all the expensive divides in
> flex code... :'( )
>
> If vmalloc() happens to be slow, it can trivially be extended to use
> huge pages too. It will happen one day, when/if necessary.
>
The current flex_array isn't optimized well. If it is well optimized,
will it be faster than vmalloc()?
--
Regards，
Changli Gao(xiaosuo@gmail.com)
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next prev parent reply other threads:[~2010-04-13 13:03 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-09 4:13 [PATCH 3/3] nfnetlink_queue: use hash table to speed up entry finding Changli Gao
2010-04-09 4:50 ` Eric Dumazet
2010-04-13 10:09 ` Patrick McHardy
2010-04-13 11:06 ` Changli Gao
2010-04-13 12:44 ` Eric Dumazet
2010-04-13 13:02 ` Changli Gao [this message]
2010-04-13 13:09 ` Changli Gao
2010-04-13 13:23 ` Eric Dumazet
2010-04-13 13:25 ` Patrick McHardy
2010-04-15 6:53 ` Changli Gao
2010-04-15 8:23 ` Eric Dumazet
2010-04-15 8:30 ` Changli Gao
2010-04-15 10:36 ` Patrick McHardy
2010-04-15 14:35 ` Changli Gao
2010-04-15 14:40 ` Patrick McHardy
2010-04-15 14:46 ` Patrick McHardy
2010-04-15 15:01 ` Changli Gao
2010-04-15 15:05 ` Patrick McHardy
2010-04-15 15:11 ` Changli Gao
2010-04-15 15:35 ` Patrick McHardy
2010-04-16 13:50 ` Changli Gao
2010-04-16 15:30 ` Patrick McHardy
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