Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752901AbZIUQ3I (ORCPT ); Mon, 21 Sep 2009 12:29:08 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751664AbZIUQ3G (ORCPT ); Mon, 21 Sep 2009 12:29:06 -0400 Received: from sous-sol.org ([216.99.217.87]:36283 "EHLO sequoia.sous-sol.org" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751647AbZIUQ3E (ORCPT ); Mon, 21 Sep 2009 12:29:04 -0400 Date: Mon, 21 Sep 2009 09:27:18 -0700 From: Chris Wright To: Stephen Hemminger Cc: Rusty Russell , virtualization@lists.linux-foundation.org, "Xin, Xiaohui" , "kvm@vger.kernel.org" , "mst@redhat.com" , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "hpa@zytor.com" , "mingo@elte.hu" , "akpm@linux-foundation.org" Subject: Re: [RFC] Virtual Machine Device Queues(VMDq) support on KVM Message-ID: <20090921162718.GM26034@sequoia.sous-sol.org> References: <20090901090518.1193e412@nehalam> <200909211637.23299.rusty@rustcorp.com.au> <20090921092130.30984dbd@s6510> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090921092130.30984dbd@s6510> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1041 Lines: 24 * Stephen Hemminger (shemminger@vyatta.com) wrote: > On Mon, 21 Sep 2009 16:37:22 +0930 > Rusty Russell wrote: > > > > > Actually this framework can apply to traditional network adapters which have > > > > just one tx/rx queue pair. And applications using the same user/kernel interface > > > > can utilize this framework to send/receive network traffic directly thru a tx/rx > > > > queue pair in a network adapter. > > > > > > More importantly, when virtualizations is used with multi-queue NIC's the virtio-net > NIC is a single CPU bottleneck. The virtio-net NIC should preserve the parallelism (lock > free) using multiple receive/transmit queues. The number of queues should equal the > number of CPUs. Yup, multiqueue virtio is on todo list ;-) thanks, -chris -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/