From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shirley Ma Subject: Re: Network performance with small packets Date: Thu, 27 Jan 2011 11:09:00 -0800 Message-ID: <1296155340.1640.34.camel@localhost.localdomain> References: <20110126151700.GA14113@redhat.com> <1296153874.1640.27.camel@localhost.localdomain> <20110127190031.GC5228@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Steve Dobbelstein , kvm@vger.kernel.org To: "Michael S. Tsirkin" Return-path: Received: from e8.ny.us.ibm.com ([32.97.182.138]:33107 "EHLO e8.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751501Ab1A0TJF (ORCPT ); Thu, 27 Jan 2011 14:09:05 -0500 Received: from d01dlp01.pok.ibm.com (d01dlp01.pok.ibm.com [9.56.224.56]) by e8.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id p0RIpMuX030537 for ; Thu, 27 Jan 2011 13:51:23 -0500 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 32CA1728042 for ; Thu, 27 Jan 2011 14:09:04 -0500 (EST) Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p0RJ94xw353248 for ; Thu, 27 Jan 2011 14:09:04 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p0RJ93qs022865 for ; Thu, 27 Jan 2011 17:09:03 -0200 In-Reply-To: <20110127190031.GC5228@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, 2011-01-27 at 21:00 +0200, Michael S. Tsirkin wrote: > Interesting. In particular running vhost and the transmitting guest > on the same host would have the effect of slowing down TX. > Does it double the BW for you too? > Running vhost and TX guest on the same host seems not good enough to slow down TX. In order to gain the double even triple BW for guest TX to local host I still need to play around, so 1K message size, BW is able to increase from 2.XGb/s to 6.XGb/s. Thanks Shirley