From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail144.messagelabs.com (mail144.messagelabs.com [216.82.254.51]) by kanga.kvack.org (Postfix) with SMTP id A387A6B004F for ; Mon, 21 Sep 2009 12:21:35 -0400 (EDT) Date: Mon, 21 Sep 2009 09:21:30 -0700 From: Stephen Hemminger Subject: Re: [RFC] Virtual Machine Device Queues(VMDq) support on KVM Message-ID: <20090921092130.30984dbd@s6510> In-Reply-To: <200909211637.23299.rusty@rustcorp.com.au> References: <20090901090518.1193e412@nehalam> <200909211637.23299.rusty@rustcorp.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Rusty Russell Cc: 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" List-ID: 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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org