Re: [PATCH] ACPI / idle: override c-state latency when not in conformance with s0ix

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On Tue, May 11, 2021 at 6:59 PM Rafael J. Wysocki <rafael@xxxxxxxxxx> wrote:
>
> On Tue, May 11, 2021 at 5:21 PM Limonciello, Mario
> <Mario.Limonciello@xxxxxxx> wrote:
> >
> > > Well, if find_deepest_state() looked at the target residency instead
> > > of the exit latency, this would work I suppose?
> >
> > Unfortunately I don't think this would help - from an OEM system the following
> > target residency values:
> >
> > # cat /sys/devices/system/cpu/cpu0/cpuidle/*/residency
> > 0
> > 2
> > 800
> > 700
>
> But this means that not just S0ix, but cpuidle in general doesn't work
> correctly on those systems and the latency quirk doesn't help here.
>
> Well, it looks like the driver needs to sort the C-states table, then.

But that wouldn't help, because the 700 us idle state is in fact deeper, right?

Are the values just swapped or are they completely bogus?



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