This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


Re: [Xen-devel] VMX-preemption timer

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



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

Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>