From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nathan March Subject: Snmp cpuRawIdle showing double Date: Tue, 05 Apr 2011 14:10:16 -0700 Message-ID: <4D9B8538.8070908@gt.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org Posted this to xen-users back in Oct (http://www.gossamer-threads.com/lists/xen/users/186768), but just confirmed that I'm still seeing this behavior on 4.1. Polling the UCE-SNMP-MIB::ssCpuRawIdle counter results in a total that's double the actual number of cpu's on the system, so for example: nms ~ # snmpwalk -v 2c -c 'XXX' xen1 1.3.6.1.4.1.2021.11.53 && sleep 60 && snmpwalk -v 2c -c 'XXX' xen1 1.3.6.1.4.1.2021.11.53 UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 1313274 UCD-SNMP-MIB::ssCpuRawIdle.0 = Counter32: 1324862 (1324862 - 1313274) / 6000 * 100 = 193% This is polling a dom0 restricted to 1 core using "dom0_max_vcpus=1 dom0_vcpus_pin=true", both proc/cpuinfo and top show only 1 core. I also see the issue on the domU's, the domU's are running a stock kernel which does not exhibit this behavior on physical hardware. This is using stock xen 4.1 with the xen/stable-2.6.32.x kernel, using net-snmp 5.4.3-r6. Anyone have any insight here or info on how I might be able to debug this further? I'm not even sure where to look beyond this. Thanks! - Nathan -- Nathan March Gossamer Threads Inc. http://www.gossamer-threads.com/ Tel: (604) 687-5804 Fax: (604) 687-5806