From: Patrick McHardy <kaber@trash.net>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Anand Raj Manickam <anandrm@gmail.com>, netfilter-devel@vger.kernel.org
Subject: Re: Any Performance benchmark on a Million conntracks
Date: Thu, 20 May 2010 16:03:55 +0200 [thread overview]
Message-ID: <4BF5414B.4090609@trash.net> (raw)
In-Reply-To: <1274360664.4046.36.camel@edumazet-laptop>
Eric Dumazet wrote:
> Le jeudi 20 mai 2010 à 18:21 +0530, Anand Raj Manickam a écrit :
>> Hi,
>> Is there any performance bench mark on conntrack response to 1 million
>> conntrack entries in the conntrack table.
>> Since conntrack uses Hashing to lookup the entries i had some doubts
>> on the scalability. Can someone shed some light please?
>
> Question is not about number of conntrack entries in hash table, but
> number of inserts and deletes per second.
>
> For persistent connections, if you use a hash table of one million
> slots, performance will be very good, since the chain length is small.
> Its scalable because each cpu can access conntrack table without locks,
> in parallel.
Actually the recommended hash table size is twice the number of
expected connections since each conntrack is hashed twice :)
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2010-05-20 14:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 12:51 Any Performance benchmark on a Million conntracks Anand Raj Manickam
2010-05-20 13:04 ` Eric Dumazet
2010-05-20 14:03 ` Patrick McHardy [this message]
2010-05-20 17:13 ` Anand Raj Manickam
2010-05-20 17:44 ` Eric Dumazet
2010-05-20 23:43 ` Changli Gao
2010-05-21 2:34 ` Eric Dumazet
2010-05-21 3:06 ` Changli Gao
2010-05-21 14:05 ` Simon Lodal
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4BF5414B.4090609@trash.net \
--to=kaber@trash.net \
--cc=anandrm@gmail.com \
--cc=eric.dumazet@gmail.com \
--cc=netfilter-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.