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Re: measuring x86 idle time?



On Fri, May 09, 2008 at 04:11:46PM -0500, David Young wrote:
> On Fri, May 09, 2008 at 04:59:58AM +0000, Michael van Elst wrote:
> > dyoung%pobox.com@localhost (David Young) writes:
> > 
> > >In NetBSD, is there a way to measure the amount of time that an x86 CPU
> > >has spent executing no instructions since boot?  I.e., idle time spent
> > >in hlt?  If I have to hack the kernel to do it, that's ok.
> > 
> > sysctl kern.cp_time ?
> 
> Thanks.  That appears to be in 1/hz units.  The numbers add to the uptime
> and everything! :-)
> 
> Looks like my system is mainly idle, just as I suspected.
> 
> Are there virtual hosting services that will not bill me for the time
> that my NetBSD/i386/amd64/xen system is idle?

I think the hypervisor will take care of that kind
of accounting anyway.

But really, the hard part could be convincing a
Xen-based VPS provider to even run !Linux domUen.
Also, VPSes aren't usually billed this way.

        Jonathan Kollasch

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