From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH] don't call adjust_vmx_controls() second time Date: Mon, 31 Aug 2009 16:52:14 +0300 Message-ID: <4A9BD58E.3050302@redhat.com> References: <20090827154130.GR30093@redhat.com> <4A96B297.5090003@redhat.com> <1251405750.9683.110.camel@twinturbo.austin.ibm.com> <4A9A3F7D.1000009@redhat.com> <4A9BCA96.8060505@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Gleb Natapov , kvm@vger.kernel.org To: Andrew Theurer Return-path: Received: from mx1.redhat.com ([209.132.183.28]:5595 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751010AbZHaNwO (ORCPT ); Mon, 31 Aug 2009 09:52:14 -0400 In-Reply-To: <4A9BCA96.8060505@linux.vnet.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: On 08/31/2009 04:05 PM, Andrew Theurer wrote: >> How does it compare to the other hypervisor now? > > > My original results for other hypervisor were a little inaccurate. > They mistakenly used 2 vcpu guests. New runs with 1 vcpu guests (as > used in kvm) have slightly lower CPU utilization. Anyway, here's the > breakdown: > > CPU percent more CPU > kvm-master/qemu-kvm-87: 50.15 78% > kvm-next/qemu-kvm-87: 37.73 34% > Much better, though still a lot of work to do. >>>> 25278 1.5214 vmlinux-2.6.31-rc5-autokern1 native_write_msr_safe >>>> 12278 0.7390 vmlinux-2.6.31-rc5-autokern1 native_read_msr_safe >> >> This will be reduced to if we move virtio to kernel context. > > Are there plans to move that to kernel for disk, too? We don't know if disk or net contributed to this. If it turns out that vhost-blk makes sense, we'll do it. -- error compiling committee.c: too many arguments to function