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Re: [Xen-devel] Xen CPU limit?
| To: | "Martin Lukasik" <martin.lukasik@xxxxxxxxxxxxx>, "Pasi Kärkkäinen" <pasik@xxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Xen CPU limit? |
| From: | "Jan Beulich" <JBeulich@xxxxxxxxxx> |
| Date: | Tue, 30 Mar 2010 08:16:26 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 30 Mar 2010 00:16:16 -0700 |
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>>> Pasi Kärkkäinen<pasik@xxxxxx> 29.03.10 17:49 >>> >I think the number of virtual cpus (vcpus) per guest is (was) 32, >and now in Xen 4.0.0 you can have up to 64 vcpus per guest. I don't think the tools are up to anything beyond 32 yet. The (64-bit) hypervisor allows up to 8192 vCPU-s iirc (but that's a truly theoretical limit, as Dom0 or a guest likely won't be able to bring up that many due to there only being 4096 event channels; current Linux requires 5-6 of them per vCPU for IPIs and timer vIRQ). Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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