Messages in this thread | | | Date | Thu, 14 Aug 2014 22:51:43 +0200 | From | Peter Zijlstra <> | Subject | Re: [RFC 0/3] Experimental patchset for CPPC |
| |
On Thu, Aug 14, 2014 at 03:57:07PM -0400, Ashwin Chaugule wrote: > > > What is CPPC: > ============= > > CPPC is the new interface for CPU performance control between the OS and the > platform defined in ACPI 5.0+. The interface is built on an abstract > representation of CPU performance rather than raw frequency. Basic operation > consists of:
Why do we want this? Typically we've ignored ACPI and gone straight to MSR access, intel_pstate and intel_idle were created especially to avoid ACPI, so why return to it.
Also, the whole interface sounds like trainwreck (one would not expect anything else from ACPI).
So _why_? [unhandled content-type:application/pgp-signature] | |