From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordon Messmer Subject: Re: Slow TCP performance from Win2k8R2 guests under Linux KVM Date: Mon, 22 Jul 2013 22:24:41 -0700 Message-ID: <51EE1399.4060509@gmail.com> References: <51E47359.4070203@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Yan Vugenfirer Return-path: Received: from mail-pb0-f44.google.com ([209.85.160.44]:56329 "EHLO mail-pb0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755068Ab3GWFYt (ORCPT ); Tue, 23 Jul 2013 01:24:49 -0400 Received: by mail-pb0-f44.google.com with SMTP id uo1so7956693pbc.17 for ; Mon, 22 Jul 2013 22:24:48 -0700 (PDT) Received: from ascension.private.dragonsdawn.net (50-199-12-33-static.hfc.comcastbusiness.net. [50.199.12.33]) by mx.google.com with ESMTPSA id 7sm35554821paf.22.2013.07.22.22.24.47 for (version=TLSv1.1 cipher=RC4-SHA bits=128/128); Mon, 22 Jul 2013 22:24:48 -0700 (PDT) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 07/21/2013 03:32 AM, Yan Vugenfirer wrote: > Can you provide results with iperf or netperf? Actually, iperf seems to operate at expected speeds, while some other applications don't. I'm working on getting a list of some of the affected programs. I believe my users first reported the problem with ftp. I'll follow up as soon as possible. Thanks for the suggestion.