linux-kernel - Re: [PATCH 1/3] Kernel interfaces for multiqueue aware socket

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Message-ID: <1292446567.2603.15.camel@edumazet-laptop>
Date:	Wed, 15 Dec 2010 21:56:07 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Fenghua Yu <fenghua.yu@...el.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	John Fastabend <john.r.fastabend@...el.com>,
	Xinan Tang <xinan.tang@...el.com>,
	Junchang Wang <junchangwang@...il.com>,
	netdev <netdev@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] Kernel interfaces for multiqueue aware socket

Le mercredi 15 décembre 2010 à 21:48 +0100, Eric Dumazet a écrit :
> Le mercredi 15 décembre 2010 à 12:02 -0800, Fenghua Yu a écrit :
> > From: Fenghua Yu <fenghua.yu@...el.com>
> > 
> > Multiqueue and multicore provide packet parallel processing methodology.
> > Current kernel and network drivers place one queue on one core. But the higher
> > level socket doesn't know multiqueue. Current socket only can receive or send
> > packets through one network interfaces. In some cases e.g. multi bpf filter
> > tcpdump and snort, a lot of contentions come from socket operations like ring
> > buffer. Even if the application itself has been fully parallelized and run on
> > multi-core systems and NIC handlex tx/rx in multiqueue in parallel, network layer
> > and NIC device driver assemble packets to a single, serialized queue. Thus the
> > application cannot actually run in parallel in high speed.

I forgot to say that your patches are not against net-next-2.6, and not
apply anyway.

Always use David trees for networking patches...


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