From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: [iGVT-g] VFIO based vGPU(was Re: [Announcement] 2015-Q3 release of XenGT - a Mediated ...) Date: Tue, 02 Feb 2016 08:28:21 +0100 Message-ID: <1454398101.9300.13.camel@redhat.com> References: <569C5071.6080004@intel.com> <569F4C86.2070501@intel.com> <56A6083E.10703@intel.com> <1453757426.32741.614.camel@redhat.com> <56A72313.9030009@intel.com> <56A77D2D.40109@gmail.com> <1453826249.26652.54.camel@redhat.com> <1453844613.18049.1.camel@redhat.com> <1453846073.18049.3.camel@redhat.com> <1453847250.18049.5.camel@redhat.com> <1453848975.18049.7.camel@redhat.com> <56A821AD.5090606@intel.com> <1453864068.3107.3.camel@redhat.com> <56A85913.1020506@intel.com> <1453911589.6261.5.camel@redhat.com> <56A9AE69.3060604@intel.com> <1453994586.29166.1.camel@redhat.com> <56AB12CC.5000402@intel.com> <56AB27AA.80602@intel.com> <1454093405.23148.13.camel@redhat.com> <1454332246.10168.47.camel@redhat.com> <1454363095.10542.10.camel@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8BIT Cc: Jike Song , Yang Zhang , "igvt-g@lists.01.org" , qemu-devel , "kvm@vger.kernel.org" , Paolo Bonzini To: Alex Williamson Return-path: Received: from mx1.redhat.com ([209.132.183.28]:59742 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753515AbcBBH2X convert rfc822-to-8bit (ORCPT ); Tue, 2 Feb 2016 02:28:23 -0500 In-Reply-To: <1454363095.10542.10.camel@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Hi, > Alternatively can the vgpu > driver copy it to a private buffer and hardware can execute from that? Copying is an option, but given the size execbuffers can have this comes with a noticeable performance difference. cheers, Gerd From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42157) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQVO0-0007c7-9Q for qemu-devel@nongnu.org; Tue, 02 Feb 2016 02:28:29 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aQVNw-0005mY-A7 for qemu-devel@nongnu.org; Tue, 02 Feb 2016 02:28:28 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42588) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aQVNw-0005mU-4p for qemu-devel@nongnu.org; Tue, 02 Feb 2016 02:28:24 -0500 Message-ID: <1454398101.9300.13.camel@redhat.com> From: Gerd Hoffmann Date: Tue, 02 Feb 2016 08:28:21 +0100 In-Reply-To: <1454363095.10542.10.camel@redhat.com> References: <569C5071.6080004@intel.com> <569F4C86.2070501@intel.com> <56A6083E.10703@intel.com> <1453757426.32741.614.camel@redhat.com> <56A72313.9030009@intel.com> <56A77D2D.40109@gmail.com> <1453826249.26652.54.camel@redhat.com> <1453844613.18049.1.camel@redhat.com> <1453846073.18049.3.camel@redhat.com> <1453847250.18049.5.camel@redhat.com> <1453848975.18049.7.camel@redhat.com> <56A821AD.5090606@intel.com> <1453864068.3107.3.camel@redhat.com> <56A85913.1020506@intel.com> <1453911589.6261.5.camel@redhat.com> <56A9AE69.3060604@intel.com> <1453994586.29166.1.camel@redhat.com> <56AB12CC.5000402@intel.com> <56AB27AA.80602@intel.com> <1454093405.23148.13.camel@redhat.com> <1454332246.10168.47.camel@redhat.com> <1454363095.10542.10.camel@redhat.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 Subject: Re: [Qemu-devel] [iGVT-g] VFIO based vGPU(was Re: [Announcement] 2015-Q3 release of XenGT - a Mediated ...) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Alex Williamson Cc: Yang Zhang , "igvt-g@lists.01.org" , Jike Song , "kvm@vger.kernel.org" , qemu-devel , Paolo Bonzini Hi, > Alternatively can the vgpu > driver copy it to a private buffer and hardware can execute from that? Copying is an option, but given the size execbuffers can have this comes with a noticeable performance difference. cheers, Gerd