From mboxrd@z Thu Jan 1 00:00:00 1970 From: linux_kvm@proinbox.com Subject: suggested vhost link speed settings Date: Sat, 27 Nov 2010 21:26:08 -0500 Message-ID: <1290911168.20434.1407472791@webmail.messagingengine.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "KVM mailing list" Return-path: Received: from out1.smtp.messagingengine.com ([66.111.4.25]:49735 "EHLO out1.smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751029Ab0K1C0K (ORCPT ); Sat, 27 Nov 2010 21:26:10 -0500 Received: from compute1.internal (compute1.nyi.mail.srv.osa [10.202.2.41]) by gateway1.messagingengine.com (Postfix) with ESMTP id 0568416E for ; Sat, 27 Nov 2010 21:26:08 -0500 (EST) Sender: kvm-owner@vger.kernel.org List-ID: Hi list, Being that the virtio interfaces are stated as acheiving 5-8 Gb throughput now with vhost, as opposed to 1Gb without, how should their link speed be defined when the choices are 2500M or 10000M? I have them plotted out to make a 10Gb bond out of a pair, counting on 5Gb max each, which I'm imagining can be acheived without concern based on what I read. If I set them to 'auto-negotiate' will it internally flap between & cause undesirable consequences? I don't want to set them at 2500 in case they ever do need to reach closer to 5 each. I'm not at a point where I can test anything yet, I'm just planning & preconfiguring so far. For the sake of preventing issues down the line I wanted to see if there's a consensus or standard for this scenario and be as sure as possible ahead of time. Thanks, -C