From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from eggs.gnu.org ([2001:4830:134:3::10]:59180)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1VbYqv-0002i9-A1
	for qemu-devel@nongnu.org; Wed, 30 Oct 2013 12:42:49 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1VbYqm-0001zc-Ri
	for qemu-devel@nongnu.org; Wed, 30 Oct 2013 12:42:41 -0400
Received: from mail-qa0-x22e.google.com ([2607:f8b0:400d:c00::22e]:65086)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <paolo.bonzini@gmail.com>) id 1VbYqm-0001zS-NU
	for qemu-devel@nongnu.org; Wed, 30 Oct 2013 12:42:32 -0400
Received: by mail-qa0-f46.google.com with SMTP id j15so3875507qaq.12
	for <qemu-devel@nongnu.org>; Wed, 30 Oct 2013 09:42:32 -0700 (PDT)
Sender: Paolo Bonzini <paolo.bonzini@gmail.com>
Message-ID: <527136F3.2010808@redhat.com>
Date: Wed, 30 Oct 2013 17:42:27 +0100
From: Paolo Bonzini <pbonzini@redhat.com>
MIME-Version: 1.0
References: <CAHuqX+GOd5F9BupakYJCaTvtmPZpc3DeyEY1=LzOfwWYCG959Q@mail.gmail.com>
In-Reply-To: <CAHuqX+GOd5F9BupakYJCaTvtmPZpc3DeyEY1=LzOfwWYCG959Q@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Subject: Re: [Qemu-devel] virtio-net performance on mach-virt.
List-Id: <qemu-devel.nongnu.org>
List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=unsubscribe>
List-Archive: <http://lists.nongnu.org/archive/html/qemu-devel>
List-Post: <mailto:qemu-devel@nongnu.org>
List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help>
List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>,
	<mailto:qemu-devel-request@nongnu.org?subject=subscribe>
To: Giridhar Maruthy <giridhar.maruthy@linaro.org>
Cc: Peter Maydell <peter.maydell@linaro.org>, QEMU Developers <qemu-devel@nongnu.org>, Christoffer Dall <christoffer.dall@linaro.org>

Il 30/10/2013 15:40, Giridhar Maruthy ha scritto:
> Hi All,
> 
> I tried to measure the network performance of guest (mach-virt) with
> virtio-net on an ARM host platform (Samsung exynos). The qemu version
> is 1.6.50.
> 
> I found that with 1GbE NIC on the host, the host iperf gave a speed of
> 847Mbits/sec when a local dhcp server was used as a iperf server.
> 
> But the guest gave a speed of 478Mbits/sec which is around 56% compared to host.
> 
> What is the typical guest network efficiency compared to host with virtio-net?
> Any ideas would be helpful.

Were you using vhost?

Paolo