From: Eric Dumazet <eric.dumazet@gmail.com>
To: Hans Schillstrom <hans.schillstrom@ericsson.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Jesper Dangaard Brouer <jbrouer@redhat.com>,
Jesper Dangaard Brouer <brouer@redhat.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
Christoph Paasch <christoph.paasch@uclouvain.be>,
"David S. Miller" <davem@davemloft.net>,
Martin Topholm <mph@hoth.dk>, Florian Westphal <fw@strlen.de>,
Tom Herbert <therbert@google.com>
Subject: Re: [RFC PATCH 2/2] tcp: Early SYN limit and SYN cookie handling to mitigate SYN floods
Date: Wed, 30 May 2012 10:24:48 +0200 [thread overview]
Message-ID: <1338366288.2760.115.camel@edumazet-glaptop> (raw)
In-Reply-To: <201205301013.10797.hans.schillstrom@ericsson.com>
On Wed, 2012-05-30 at 10:03 +0200, Hans Schillstrom wrote:
> We have this option running right now, and it gave slightly higher values.
> The upside is only one core is running at 100% load.
>
> To be able to process more SYN an attempt was made to spread them with RPS to
> 2 other cores gave 60% more SYN:s per sec
> i.e. syn filter in NIC sending all irq:s to one core gave ~ 52k syn. pkts/sec
> adding RPS and sending syn to two other core:s gave ~80k syn. pkts/sec
> Adding more cores than two didn't help that much.
When you say 52.000 pkt/s, is that for fully established sockets, or
SYNFLOOD ?
19.23 us to handle _one_ SYN message seems pretty wrong to me, if there
is no contention on listener socket.
next prev parent reply other threads:[~2012-05-30 8:24 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-28 11:52 [RFC PATCH 0/2] Faster/parallel SYN handling to mitigate SYN floods Jesper Dangaard Brouer
2012-05-28 11:52 ` [RFC PATCH 1/2] tcp: extract syncookie part of tcp_v4_conn_request() Jesper Dangaard Brouer
2012-05-28 11:52 ` [RFC PATCH 2/2] tcp: Early SYN limit and SYN cookie handling to mitigate SYN floods Jesper Dangaard Brouer
2012-05-29 19:37 ` Andi Kleen
2012-05-29 20:18 ` David Miller
2012-05-30 6:41 ` Eric Dumazet
2012-05-30 7:45 ` Jesper Dangaard Brouer
2012-05-30 8:15 ` Eric Dumazet
2012-05-30 9:24 ` Jesper Dangaard Brouer
2012-05-30 9:46 ` Eric Dumazet
2012-05-30 8:03 ` Hans Schillstrom
2012-05-30 8:24 ` Eric Dumazet [this message]
2012-05-30 11:14 ` Hans Schillstrom
2012-05-30 21:20 ` Rick Jones
2012-05-31 8:28 ` Eric Dumazet
2012-05-31 8:45 ` Hans Schillstrom
2012-05-31 14:09 ` Eric Dumazet
2012-05-31 15:31 ` Hans Schillstrom
2012-05-31 17:16 ` Eric Dumazet
2012-05-28 16:14 ` [RFC PATCH 0/2] Faster/parallel SYN " Christoph Paasch
2012-05-29 20:17 ` Jesper Dangaard Brouer
2012-05-29 20:36 ` Christoph Paasch
2012-05-30 8:44 ` Jesper Dangaard Brouer
2012-05-30 8:50 ` Eric Dumazet
2012-05-30 8:53 ` Christoph Paasch
2012-05-30 22:40 ` Jesper Dangaard Brouer
2012-05-31 12:51 ` Jesper Dangaard Brouer
2012-05-31 12:58 ` Eric Dumazet
2012-05-31 13:04 ` Jesper Dangaard Brouer
2012-05-31 13:10 ` Eric Dumazet
2012-05-31 13:24 ` Jesper Dangaard Brouer
2012-05-30 4:45 ` Eric Dumazet
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