From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Paweł Staszewski" <pstaszewski@itcare.pl>
Cc: Linux Network Development list <netdev@vger.kernel.org>
Subject: Re: Linux Route Cache performance tests
Date: Mon, 07 Nov 2011 10:08:42 +0100 [thread overview]
Message-ID: <1320656922.2361.1.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC> (raw)
In-Reply-To: <4EB798A5.7000900@itcare.pl>
Le lundi 07 novembre 2011 à 09:36 +0100, Paweł Staszewski a écrit :
> Yes after enabling NUMA I can change rhash_entries on kernel boot.
>
> And what is the most important for big route cahce is rhash_entries
> if route cache size exceed hash size performance will drop 6x to 8x
> So the best settings for route cache are:
> rhash_entries = gc_thresh = max_size
>
> Eric tell me what are the plans for removing route cache from kernel ?
> Because as You see with route cache performance is better
> And without route cache performance is not soo good than with route
> cache enabled but it is stable for all situations even DDOS with 10kk
> random_ips
>
> So for the feature we need to prepare for lower kernel IP forwarding
> performance because of no route cache ?
> Or removing route cache will save some time in IP stack processing ?
>
Obviously, cache removal will be possible only when performance without
it is the same.
Work is in progress, it started a long time ago.
next prev parent reply other threads:[~2011-11-07 9:08 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-06 15:57 Linux Route Cache performance tests Paweł Staszewski
2011-11-06 17:29 ` Eric Dumazet
2011-11-06 18:28 ` Paweł Staszewski
2011-11-06 18:48 ` Eric Dumazet
2011-11-06 19:20 ` Paweł Staszewski
2011-11-06 19:38 ` Eric Dumazet
2011-11-06 20:25 ` Paweł Staszewski
2011-11-06 21:26 ` Eric Dumazet
2011-11-06 21:57 ` Paweł Staszewski
2011-11-06 23:08 ` Eric Dumazet
2011-11-07 8:36 ` Paweł Staszewski
2011-11-07 9:08 ` Eric Dumazet [this message]
2011-11-07 9:16 ` Eric Dumazet
2011-11-07 22:12 ` Paweł Staszewski
2011-11-07 13:42 ` Ben Hutchings
2011-11-07 14:33 ` Eric Dumazet
2011-11-09 17:24 ` [PATCH net-next] ipv4: PKTINFO doesnt need dst reference Eric Dumazet
2011-11-09 21:37 ` David Miller
2011-11-09 22:03 ` Eric Dumazet
2011-11-10 0:29 ` [PATCH net-next] bnx2x: reduce skb truesize by 50% Eric Dumazet
2011-11-10 15:05 ` Eilon Greenstein
2011-11-10 15:27 ` Eric Dumazet
2011-11-10 16:27 ` Eilon Greenstein
2011-11-10 16:45 ` Eric Dumazet
2011-11-13 18:53 ` Eilon Greenstein
2011-11-13 19:42 ` Eric Dumazet
2011-11-13 20:08 ` Eilon Greenstein
2011-11-13 22:00 ` Eric Dumazet
2011-11-14 5:08 ` David Miller
2011-11-14 6:25 ` Eric Dumazet
2011-11-14 15:57 ` Eric Dumazet
2011-11-14 19:21 ` David Miller
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