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[cyring]

Getting a "115500" 7-zip score using a Desktop Ryzen 3950X / ArchLinux...

[cyring]

Trying various hints did not make a difference.
But I noticed that the MONITOR/MWAIT power overhead is barely the same as Core C6 state (CC6) d...

[cyring]

It's a nice move from AMD; using Zen architectures, having the number of cycles elapsed in deep idle states like Core and Package C6, (Intel is providing...

[cyring]

CPUID 0xb on Zen! Hum, won't make that bet to get the APIC ID...

[cyring]

Moving forward is good thing but I fear they will have tremendous non-regression tests !...

[cyring]

What Intel had successfully provided:

• HWP
• EEO
• R2H

This AMD ACPI CPPC implementation is not at best and depends on BIOS/UEFI manufacturers.
...

[cyring]

It happens with previous architectures, legacy P-State mode could trigger Turbo frequency a bit higher than HWP.

HWP enabled, you can also...

[cyring]

Thanks for these.

[cyring]

What about the kernel boot log

[cyring]

x86/msr: add AMD CPPC MSR definitions
Those registers are not even in PPR yet.

Thank you AMD...

[cyring]

During your Linux tests, have a closed look on the C-States plan and the boosted ratios among those P and E core families.

Also the resulting...

[cyring]

Can the kernel boot log be shared ?
Also topology of Cores, PCI, MC and so on ...

[cyring]

Those would have been done more than a year ago if the AMD specifications were more than a preview of Registers subset.
The old way, BKDG for Zen...

[cyring]

Idle states are most of important

[cyring]

Hope this patch won't prevent drivers to remap those first megabyte addresses ...