RE: [Xen-devel] [PATCH 0/4] ACPI: Backport to make dom0 throttling works with MSR

[Ian Pratt <Ian.Pratt@xxxxxxxxxxxxx>]

> This patchset backport a series of T-State patches from kernel upstream
> to make dom0 ACPI throttling works with MSR( Fixed H/W). Meanwhile, it
> enable THERM_CONTROL MSR write for dom0 even cpufreq=xen.

On modern CPUs, is the TSC invariant to T-state throttling? If so, which 
generation did this start happening?

On server/desktop systems I believe that T-state throttling is intended to be a 
rare event usually due to bad system thermal design. Is this the case with 
laptops, or would we expect to see more? Do any of the forthcoming "turbo" 
modes change this?

Thanks,
Ian

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