From: David Miller <davem@davemloft.net>
To: eric.dumazet@gmail.com
Cc: hans.schillstrom@ericsson.com, netdev@vger.kernel.org,
ncardwell@google.com, brouer@redhat.com, therbert@google.com
Subject: Re: [PATCH v2] tcp: reflect SYN queue_mapping into SYNACK packets
Date: Fri, 01 Jun 2012 14:23:25 -0400 (EDT) [thread overview]
Message-ID: <20120601.142325.1372147261206298305.davem@davemloft.net> (raw)
In-Reply-To: <1338551270.2760.1505.camel@edumazet-glaptop>
From: Eric Dumazet <eric.dumazet@gmail.com>
Date: Fri, 01 Jun 2012 13:47:50 +0200
> From: Eric Dumazet <edumazet@google.com>
>
> While testing how linux behaves on SYNFLOOD attack on multiqueue device
> (ixgbe), I found that SYNACK messages were dropped at Qdisc level
> because we send them all on a single queue.
>
> Obvious choice is to reflect incoming SYN packet @queue_mapping to
> SYNACK packet.
>
> Under stress, my machine could only send 25.000 SYNACK per second (for
> 200.000 incoming SYN per second). NIC : ixgbe with 16 rx/tx queues.
>
> After patch, not a single SYNACK is dropped.
>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Applied.
prev parent reply other threads:[~2012-06-01 18:23 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-01 11:47 [PATCH v2] tcp: reflect SYN queue_mapping into SYNACK packets Eric Dumazet
2012-06-01 18:23 ` David Miller [this message]
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