Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755986AbZIVKlH (ORCPT ); Tue, 22 Sep 2009 06:41:07 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755963AbZIVKlG (ORCPT ); Tue, 22 Sep 2009 06:41:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57680 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755928AbZIVKlE (ORCPT ); Tue, 22 Sep 2009 06:41:04 -0400 Date: Tue, 22 Sep 2009 13:38:07 +0300 From: "Michael S. Tsirkin" To: Chris Wright Cc: Stephen Hemminger , Rusty Russell , virtualization@lists.linux-foundation.org, "Xin, Xiaohui" , "kvm@vger.kernel.org" , "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: <20090922103807.GA2555@redhat.com> References: <20090901090518.1193e412@nehalam> <200909211637.23299.rusty@rustcorp.com.au> <20090921092130.30984dbd@s6510> <20090921162718.GM26034@sequoia.sous-sol.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090921162718.GM26034@sequoia.sous-sol.org> 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: 1204 Lines: 31 On Mon, Sep 21, 2009 at 09:27:18AM -0700, Chris Wright wrote: > * 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 Note we'll need multiqueue tap for that to help. -- MST -- 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/