Re: [PATCH 0/2] turbostat: Improve support for AMD Zen CPUs (RAPL, CPUID)

From: Rafael J. Wysocki
Date: Wed Jul 18 2018 - 05:44:40 EST


On Wednesday, July 18, 2018 3:36:40 AM CEST Calvin Walton wrote:
> Based on the documentation provided in AMD's Open-Source
> Register Reference For AMD Family 17h Processors:
> https://support.amd.com/TechDocs/56255_OSRR.pdf
>
> I've added support for reading Cores and Package energy usage from AMD's
> "RAPL" MSRs. In order to correctly detect the AMD processor generation,
> I've also had to update the CPUID code to handle AMD's extended family
> field.
>
> Here's some example output from my (idle) Ryzen 3 2200G test system:
>
> turbostat version 17.06.23 - Len Brown <lenb@xxxxxxxxxx>
> CPUID(0): AuthenticAMD 13 CPUID levels; family:model:stepping 0x17:11:0 (23:17:0)
> CPUID(1): SSE3 MONITOR - - - TSC MSR - -
> CPUID(6): APERF, No-TURBO, No-DTS, No-PTM, No-HWP, No-HWPnotify, No-HWPwindow, No-HWPepp, No-HWPpkg, No-EPB
> CPUID(7): No-SGX
> RAPL: 364 sec. Joule Counter Range, at 180 Watts
> cpu2: POLL: CPUIDLE CORE POLL IDLE
> cpu2: C1: ACPI FFH INTEL MWAIT 0x0
> cpu2: C2: ACPI IOPORT 0x414
> cpu2: cpufreq driver: acpi-cpufreq
> cpu2: cpufreq governor: schedutil
> cpu0: MSR_RAPL_PWR_UNIT: 0x000a1003 (0.125000 Watts, 0.000015 Joules, 0.000977 sec.)
> Core CPU Avg_MHz Busy% Bzy_MHz TSC_MHz IRQ C1 C2 C1% C2% CorWatt PkgWatt
> - - 33 2.20 1485 3500 5073 1263 3694 2.75 95.12 0.03 3.29
> 0 0 33 2.20 1483 3500 1213 354 886 2.96 94.89 0.01 3.29
> 1 1 25 1.67 1474 3500 907 197 682 1.55 96.80 0.01
> 2 2 33 2.24 1478 3500 1674 450 1175 4.16 93.70 0.01
> 3 3 40 2.67 1501 3500 1279 262 951 2.33 95.07 0.01
>
>
> Calvin Walton (2):
> turbostat: Read extended processor family from CPUID
> turbostat: Add support for AMD Fam 17h (Zen) RAPL
>
> tools/power/x86/turbostat/turbostat.c | 184 ++++++++++++++++++++++----
> 1 file changed, 156 insertions(+), 28 deletions(-)
>
>

CC to linux-pm@xxxxxxxxxxxxxxx pretty please!