Re: [PATCH] ACPI: processor_idle: Skip dummy wait for processors based on the Zen microarchitecture

[Rafael J. Wysocki]

On Thu, Sep 22, 2022 at 5:36 PM Borislav Petkov <bp@xxxxxxxxx> wrote:
>
> On Thu, Sep 22, 2022 at 05:21:21PM +0200, Rafael J. Wysocki wrote:
> > Well, it can be forced to use ACPI idle instead.
>
> Yeah, I did that earlier. The dummy IO read in question costs ~3K on
> average on my Coffeelake box here.

Well, that's the cost of forcing something non-default.