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[Xen-devel] CPU usage for credit2
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] CPU usage for credit2 |
| From: | Yuehai Xu <yuehaixu@xxxxxxxxx> |
| Date: | Thu, 23 Sep 2010 09:48:10 -0400 |
| Cc: | George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, xen-tools@xxxxxxxxxxxxxxxxxxx, yhxu@xxxxxxxxx |
| Delivery-date: | Thu, 23 Sep 2010 06:49:01 -0700 |
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Hi, Suppose 2 VMs both of which just has a single VCPU share a single PCPU, if I run CPU intensive program in both of the VMs, the percentage of CPU usage from xentop is almost 100% for both of the VMs. I got confusing because since 2 VCPU shares a single PCPU, the percentage for each one should be around 50%, which is the result if I change the scheduler from credit2 to credit. Does it because credit2 change something or is this a bug for xentop or credit2? Thanks, Yuehai _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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