From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julien Grall Subject: Re: [PATCH v2 00/20] xen/arm64: Add support for 64KB page Date: Mon, 20 Jul 2015 18:54:56 +0100 Message-ID: <55AD35F0.3090706__11750.1756911681$1437415080$gmane$org@citrix.com> References: <1436474552-31789-1-git-send-email-julien.grall@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta14.messagelabs.com ([193.109.254.103]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZHFIe-0004nC-Bh for xen-devel@lists.xenproject.org; Mon, 20 Jul 2015 17:56:24 +0000 In-Reply-To: <1436474552-31789-1-git-send-email-julien.grall@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xenproject.org Cc: wei.liu2@citrix.com, ian.campbell@citrix.com, stefano.stabellini@eu.citrix.com, linux-kernel@vger.kernel.org, david.vrabel@citrix.com, boris.ostrovsky@oracle.com, linux-arm-kernel@lists.infradead.org, roger.pau@citrix.com List-Id: xen-devel@lists.xenproject.org On 09/07/15 21:42, Julien Grall wrote: > Average betwen 10 iperf : > > DOM0 Guest Result > > 4KB-mod 64KB 3.176 Gbits/sec > 4KB-mod 4KB-mod 3.245 Gbits/sec > 4KB-mod 4KB 3.258 Gbits/sec > 4KB 4KB 3.292 Gbits/sec > 4KB 4KB-mod 3.265 Gbits/sec > 4KB 64KB 3.189 Gbits/sec > > 4KB-mod: Linux with the 64KB patch series > 4KB: linux/master > > The network performance is slightly worst with this series (-0.15%). I suspect, > this is because of using an indirection to setup the grant. This is necessary > in order to ensure that the grant will be correctly sized no matter of the > Linux page granularity. This could be used later in order to support bigger > grant. I didn't compute correctly the result. It's -1.5% and not -0.15% sorry. -- Julien Grall