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[Xen-devel] CPU Usage Discrepancies
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] CPU Usage Discrepancies |
| From: | "Pradeep Vincent" <pradeep.vincent@xxxxxxxxx> |
| Date: | Fri, 2 Mar 2007 15:42:48 -0800 |
| Delivery-date: | Fri, 02 Mar 2007 15:41:57 -0800 |
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I see serious discrepancies between Cpu usage as reported by /proc/stat on Xen3 virts and Cpu usage as reported by the hypervisor via "xm" tool (cpu_time). The problem exists on Intel and AMD platforms - 1 Vcpu and multiple Vcpu slots - 1 Physical CPU and multiple Physical CPU hosts. The skew is pronounced with workloads that "sleep-wake-sleep-wake" at a high frequency while workloads that hog the CPU don't exhibit this problem as much. Anybody seen this ? Any insights ? http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=882 has all the details. - Pradeep Vincent _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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