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Re: [Xen-devel] Hyperthreading
| To: | Pete Zaitcev <zaitcev@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Hyperthreading |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Tue, 30 May 2006 08:13:50 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Tue, 30 May 2006 00:19:14 -0700 |
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On 29 May 2006, at 23:22, Pete Zaitcev wrote: Does the guest OS need to detect hyperthreading? One would think that the hypervisor decides what to schedule on what CPU, and the job of the guest is not to be too smart for its own good. So, my first reaction was to comment detect_ht() altogether. Fedora Core 5 has the code in detect_ht(), though I have no idea what the results of this are on HT CPUs, if they match the reality. We fake out core and sibling maps in our own drivers/xen/core/smpboot.c. identify_cpu() is called only for the first VCPU, mainly to get common info like CPU make and model and features. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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