From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [GIT PULL] AlacrityVM guest drivers for 2.6.33 Date: Wed, 23 Dec 2009 14:48:35 +0200 Message-ID: <4B3211A3.1090202@redhat.com> References: <4B1D4F29.8020309@gmail.com> <87637zdy9g.fsf@basil.nowhere.org> <4B30E654.40702@codemonkey.ws> <200912221701.56840.bzolnier@gmail.com> <4B30F214.80206@codemonkey.ws> <20091223065129.GA19600@elte.hu> <20091223101340.GC20539@basil.fritz.box> <4B31EF65.6070000@redhat.com> <20091223121431.GF20539@basil.fritz.box> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Ingo Molnar , Anthony Liguori , Bartlomiej Zolnierkiewicz , Gregory Haskins , kvm@vger.kernel.org, Andrew Morton , torvalds@linux-foundation.org, "linux-kernel@vger.kernel.org" , netdev@vger.kernel.org, "alacrityvm-devel@lists.sourceforge.net" , Chris Wright To: Andi Kleen Return-path: In-Reply-To: <20091223121431.GF20539@basil.fritz.box> Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 12/23/2009 02:14 PM, Andi Kleen wrote: >> http://www.redhat.com/f/pdf/summit/cwright_11_open_source_virt.pdf >> >> See slide 32. This is without vhost-net. >> > Thanks. Do you also have latency numbers? > No. Copying Chris. This was with the tx mitigation timer disabled, so you won't see the usual atrocious userspace virtio latencies, but it won't be as good as a host kernel implementation since we take a heavyweight exit and qemu is pretty unoptimized. > It seems like there's definitely still potential for improvement > with messages<4K. But for the large messages they indeed > look rather good. > There's still a lot of optimization to be done, but I hope this proves there is nothing inherently slow about virtio. -- error compiling committee.c: too many arguments to function