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

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Date:   Wed, 18 Jul 2018 11:42:55 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Calvin Walton <calvin.walton@...stin.ca>
Cc:     linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 0/2] turbostat: Improve support for AMD Zen CPUs (RAPL, CPUID)

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@...nel.org>
> 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@...r.kernel.org pretty please!