From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takuya Yoshikawa Subject: Re: [PATCH-v2 0/4] KVM: dirty logging optimization Date: Thu, 25 Nov 2010 18:48:27 +0900 Message-ID: <4CEE30EB.80600@oss.ntt.co.jp> References: <20101122144055.f5e36522.yoshikawa.takuya@oss.ntt.co.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, takuya.yoshikawa@gmail.com To: avi@redhat.com, mtosatti@redhat.com Return-path: Received: from serv2.oss.ntt.co.jp ([222.151.198.100]:32824 "EHLO serv2.oss.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751934Ab0KYJpy (ORCPT ); Thu, 25 Nov 2010 04:45:54 -0500 In-Reply-To: <20101122144055.f5e36522.yoshikawa.takuya@oss.ntt.co.jp> Sender: kvm-owner@vger.kernel.org List-ID: (2010/11/22 14:40), Takuya Yoshikawa wrote: > === I'm going to do additional measurements this weekend. - Especially with NPT. If you have any request about which cases you want to see, please let me know! Thanks, Takuya > Test > > - On core 2 duo machine (without EPT) > => just because there was already test environment. > - 1GB RAM for the guest > - Workloads: > x11perf for frame buffer test > "find /" loop for live-migration test > > - Time was measured by rdtscll > kvm mask: our method > kvm orig: original method > > > a) Frame buffer > --------------------------------------------------------------- > > kernel: [ 5584.954209] kvm: nr_dirty_pages/npages = 8/4096 > kernel: [ 5584.954240] kvm mask: time(tsc) = 9485 > > kernel: [ 5992.185125] kvm: nr_dirty_pages/npages = 7/4096 > kernel: [ 5992.185389] kvm orig: time(tsc) = 444724 > > 45 times faster > > --------------------------------------------------------------- > > kernel: [ 5588.330585] kvm: nr_dirty_pages/npages = 80/4096 > kernel: [ 5588.330623] kvm mask: time(tsc) = 16688 > > kernel: [ 5996.183982] kvm: nr_dirty_pages/npages = 80/4096 > kernel: [ 5996.184275] kvm orig: time(tsc) = 495551 > > 30 times faster > > --------------------------------------------------------------- > > kernel: [ 5578.156641] kvm: nr_dirty_pages/npages = 195/4096 > kernel: [ 5578.156690] kvm mask: time(tsc) = 27335 > > kernel: [ 5985.109688] kvm: nr_dirty_pages/npages = 195/4096 > kernel: [ 5985.109820] kvm orig: time(tsc) = 194530 > > 7 times faster > > --------------------------------------------------------------- > > kernel: [ 5605.821017] kvm: nr_dirty_pages/npages = 375/4096 > kernel: [ 5605.821077] kvm mask: time(tsc) = 35049 > > kernel: [ 6014.627767] kvm: nr_dirty_pages/npages = 375/4096 > kernel: [ 6014.628190] kvm orig: time(tsc) = 702737 > > 20 times faster > > --------------------------------------------------------------- > > kernel: [ 5573.551459] kvm: nr_dirty_pages/npages = 576/4096 > kernel: [ 5573.551532] kvm mask: time(tsc) = 46718 > > kernel: [ 5981.486862] kvm: nr_dirty_pages/npages = 576/4096 > kernel: [ 5981.487036] kvm orig: time(tsc) = 210385 > > 5 times faster > > --------------------------------------------------------------- > > > > b) Live-migration (1GB RAM) > --------------------------------------------------------------- > > kernel: [ 5011.599573] kvm: nr_dirty_pages/npages = 52/261888 > kernel: [ 5011.599624] kvm mask: time(tsc) = 33712 > > kernel: [ 4297.465401] kvm: nr_dirty_pages/npages = 50/261888 > kernel: [ 4297.465918] kvm orig: time(tsc) = 894593 > > 25 times faster > > --------------------------------------------------------------- > > kernel: [ 5009.045842] kvm: nr_dirty_pages/npages = 120/261888 > kernel: [ 5009.045940] kvm mask: time(tsc) = 50575 > > kernel: [ 4295.438092] kvm: nr_dirty_pages/npages = 106/261888 > kernel: [ 4295.438427] kvm orig: time(tsc) = 525140 > > 10 times faster > > --------------------------------------------------------------- > > kernel: [ 5016.914031] kvm: nr_dirty_pages/npages = 251/261888 > kernel: [ 5016.914160] kvm mask: time(tsc) = 78750 > > kernel: [ 4297.265937] kvm: nr_dirty_pages/npages = 260/261888 > kernel: [ 4297.266411] kvm orig: time(tsc) = 782446 > > 10 times faster > > --------------------------------------------------------------- > > kernel: [ 5015.717535] kvm: nr_dirty_pages/npages = 526/261888 > kernel: [ 5015.717697] kvm mask: time(tsc) = 130137 > > kernel: [ 4295.370101] kvm: nr_dirty_pages/npages = 596/261888 > kernel: [ 4295.370589] kvm orig: time(tsc) = 644805 > > 5 times faster > > --------------------------------------------------------------- > > kernel: [ 5011.693010] kvm: nr_dirty_pages/npages = 1029/261888 > kernel: [ 5011.693177] kvm mask: time(tsc) = 219863 > > kernel: [ 4295.760635] kvm: nr_dirty_pages/npages = 1025/261888 > kernel: [ 4295.761078] kvm orig: time(tsc) = 767333 > > 3 times faster > > --------------------------------------------------------------- > > kernel: [ 5014.805403] kvm: nr_dirty_pages/npages = 2219/261888 > kernel: [ 5014.805676] kvm mask: time(tsc) = 454314 > > kernel: [ 4302.186712] kvm: nr_dirty_pages/npages = 1982/261888 > kernel: [ 4302.191418] kvm orig: time(tsc) = 2294187 > > 5 times faster > > --------------------------------------------------------------- > > kernel: [ 5015.305794] kvm: nr_dirty_pages/npages = 4143/261888 > kernel: [ 5015.306291] kvm mask: time(tsc) = 847175 > > kernel: [ 4302.068376] kvm: nr_dirty_pages/npages = 3835/261888 > kernel: [ 4302.069456] kvm orig: time(tsc) = 1855105 > > 3 times faster > > --------------------------------------------------------------- > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html