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Re: [Xen-devel] Native hypercall basics using int 82
| To: | Andrew Lyon <andrew.lyon@xxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Native hypercall basics using int 82 |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Wed, 17 Dec 2008 12:24:12 +0000 |
| Cc: | hnrkssn hnrkssn <hnrkssn@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 17 Dec 2008 04:24:27 -0800 |
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| Thread-topic: | [Xen-devel] Native hypercall basics using int 82 |
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On 17/12/2008 11:46, "Andrew Lyon" <andrew.lyon@xxxxxxxxx> wrote: > How is it enabled in the open source edition? I cannot find any documentation. Add 'viridian=1' to your domain config file. > And how does it improve performance? APIC accesses are done via emulated MSRs rather than emulated mmio cycles, which is a teeny bit faster. Also we implement spin-wait notofications, so a vcpu can be descheduled rather than spin. There's others also we could implement but it's not clear it would be a win for us. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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