Re: [Xen-devel] VMX-preemption timer

[Tim Deegan <Tim.Deegan@xxxxxxxxxx>]

At 16:10 +0100 on 24 Apr (1240589435), OK wrote:
> At 15:47 +0100 on 24 Apr (1240588035), OK wrote:
> > Hi everybody!
> > I am new in Xen and have a problem.
> > I use Intel-VT processor, Xen 3.3.0 (built from sources) and hvm-domain 
> > Windows Vista. I read in Intel Software Developer Manual about 
> > VMX-preemption timer. I want to cause periodic VM-exits and use this 
> > feature to do it. But I can't find preemption timer in Xen source codes. 
> > For example, there is not preemption timer among vmx exit reasons in 
> > \include\asm-x86\hvm\vmx\vmx.h. Does anybody know about VMX-preemption 
> > timer support in Xen?
> 
> This feature's not used (or needed) by Xen.
> 
> Thanks. But does Xen have any "timer"-feature  to initiate periodic exits 
> (period about 5-10 minutes)?

Xen has a general per-CPU timer system that you could use for that; 
look at the functions in xen/include/xen/timer.h

Cheers,

Tim.

-- 
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Citrix Systems (R&D) Ltd.
[Company #02300071, SL9 0DZ, UK.]

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