From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Perf regression of netperf compared Xen 4.4 to origin/master Date: Wed, 2 Jul 2014 12:52:00 -0400 Message-ID: <20140702165200.GA3044@laptop.dumpdata.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="Nq2Wo0NMKNjxTN9z" Return-path: Received: from mail6.bemta3.messagelabs.com ([195.245.230.39]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1X2NlR-00017M-3l for xen-devel@lists.xenproject.org; Wed, 02 Jul 2014 16:52:09 +0000 Received: from acsinet21.oracle.com (acsinet21.oracle.com [141.146.126.237]) by userp1040.oracle.com (Sentrion-MTA-4.3.2/Sentrion-MTA-4.3.2) with ESMTP id s62Gq444017112 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 2 Jul 2014 16:52:05 GMT Received: from userz7022.oracle.com (userz7022.oracle.com [156.151.31.86]) by acsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id s62Gq3Gm028428 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 2 Jul 2014 16:52:04 GMT Received: from abhmp0010.oracle.com (abhmp0010.oracle.com [141.146.116.16]) by userz7022.oracle.com (8.14.5+Sun/8.14.4) with ESMTP id s62Gq1mn002121 for ; Wed, 2 Jul 2014 16:52:02 GMT Content-Disposition: inline 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 List-Id: xen-devel@lists.xenproject.org --Nq2Wo0NMKNjxTN9z Content-Type: text/plain; charset=us-ascii Content-Disposition: inline The test is pretty silly. I've 14 guests, and I make each guest run netperf against the other. I start with 1 pair, then 2 pairs, then up to 7. Each guest is 768 MB, runs in a RAMdisk and just has one vif. The box is a SuperMicro X8DB8+ with two E5520 and 12GB of RAM. The netperf runs for a minute. The guests are PVHVM and I am using qemu-upstream. The guest configs are: builder='hvm' disk = [ 'file:/mnt/lab/bootstrap-x86_64/root_image.iso,hdc:cdrom,r'] memory=768 boot='d' vcpus=1 serial='file:/var/log/xen/console-g-vm0.log' vnclisten='0.0.0.0' name='g-vm0' on_crash='preserve' # IP is 192.168.102.90 vif = [ 'mac=00:0f:4b:01:01:00, bridge=switch' ] .. and naturally the ip, name and MAC change for each guest. The kernel for both the guest and domain 0 is the same - no configuration change. The Xen is built without debug=y. When doing this test under Xen 4.4: 0, 8823.14, 8823.14, 8823.14, 8823.14 1, 9645.67, 4822.84, 4085.88, 5559.79 2, 11725.3, 3908.44, 2652.09, 4698.15 3, 12199.3, 3049.83, 1473.95, 3631.93 4, 12223.2, 2444.64, 1023.48, 2887.83 5, 11733.4, 1955.57, 909.66, 3057.11 6, 11927.7, 1703.95, 1187.29, 1933.76 7, 11623.8, 1452.97, 538.11, 2228.21 And when doing it under 'master' branch: 0, 8478.57, 8478.57, 8478.57, 8478.57 1, 7663.38, 3831.69, 3427.70, 4235.68 2, 8381.77, 2793.92, 1977.75, 3242.46 3, 8165.55, 2041.39, 1373.43, 2294.48 4, 7742.64, 1548.53, 763.08, 2065.43 5, 7691.87, 1281.98, 626.85, 1784.72 6, 8337.06, 1191.01, 626.98, 1847.55 7, 8074.8, 1009.35, 384.84, 1380.00 I am going to start a bit of git bisection to figure this out but if somebody has some ideas on where/when to concentrate I would appreciate the help. --Nq2Wo0NMKNjxTN9z Content-Type: image/png Content-Disposition: attachment; filename="network.png" Content-Transfer-Encoding: base64 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