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[Xen-users] Real CPUs (Dual Core) vs. VCPU count in HVM DomU
| To: | xen-users <xen-users@xxxxxxxxxxxxxxxxxxx> |
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| Subject: | [Xen-users] Real CPUs (Dual Core) vs. VCPU count in HVM DomU |
| From: | George Lenzer <George.Lenzer@xxxxxxx> |
| Date: | Tue, 28 Aug 2007 10:47:00 -0400 |
| Delivery-date: | Thu, 30 Aug 2007 02:45:27 -0700 |
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I have a server with two dual core Xeon CPUs. So the real CPU count is
two, but with the dual cores it's four and that's what 'top' and 'cat
/proc/cpuinfo' reflect. So when configuring a Xen HVM domain, should I
set the VCPU count to 2 (equal to the number of physical processors in
Dom0) or, should I set it to 4 (equal to the number of cores in Dom0)?
I am currently running with VCPUs set to 2 and things seem to be working
much better (faster) than when it was set to 4. However, it's kind of
weird to read /proc/cpuinfo and see two CPUs listed as dual core, but
only have two CPUs... The DomU HVM domain will be used for a high
traffic groupware server (Zimbra) which means high network and disk
I/O. So I suspect CPU performance should be up to snuff to keep up in
HVM. Any ideas?
-- George Lenzer Computer and Networking Specialist Cleveland Public Library Automation Department Office: (216)623-2981 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users |
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